An alternative to green screen – keying with alpha channel mask Now, we want the black background to stay and the white letters to disappear in order to be able to see the video images. A channel in this context is the grayscale image of the same size as a color image, made of just one of these primary colors. This is done by selecting Layer → Tranparency → Add Alpha Channel. Associated and unassociated alpha. xcf is gimps internal format, and as such its really complicated, so its not surprising that image magick only has cursory support for it. Notice there is an alpha channel transparency around the shape of the butterfly. Command+click on the alpha channel’s thumbnail (or select the Alpha channel and click the little dashed circle at the bottom of the channels dialog “Load channel as selection”) Choose Layer > Layer Mask > Reveal Selection. The above command "gdal_translate" takes only the first 3 bands of the image and creates a new one called "ortho_new. Click 'Save'. It has been challenging before expressing transparencies from video on the web, because video formats/containers that support alpha channels like animation or png video do not play nicely in browsers. 9k Followers, 810 Following, 1,969 Posts - See Instagram photos and videos from Alphachanneling (@alphachanneling). I am assuming I cant do the following inside of Paint. The fourth-most widely used channel is the Alpha Channel. An alpha channel is a type of mask. If a texture does not contain an alpha channel, connecting the 'alpha' channel to something, while not technically illegal, will always result in zero (black). Create, view, edit, and extract icons, cursors, and bitmaps. You shoot a set of overlapping photographs of a scene from a single location, and Image Composite Editor creates a high-resolution panorama incorporating all your images at full resolution. Corel® Painter™ 12. The RGBA button enables saving the alpha channel and is only visible if the image format supports alpha. If image is grayscale, tuple. ] Introduction. I'd guess that Accurender will be replaced at some point with Mental Ray. For instance, an image from a standard digital camera will have a red, green and blue channel. It's a follow-up to my post about converting between the image formats used by Office and the. The alpha channel can be supplied either via a separate PNG image (called a mask) or, for PNGs, an internal alpha channel can be used directly. A bitmap image is positioned over objects in preparation for creating an alpha channel mask. Unity reads that as alpha. Alpha channel shown in black, on the right A 24-bit truecolor file contains three channels of color information: red, green, and blue, or RGB. When you add an alpha channel, PNGs allow for up to 64 bits per channel. At texture save time, or asset baking time, or even load time, multiply each non-alpha channel by alpha. Editing the Alpha Channel Now that you have an "editable" alpha channel layer, go to the "Layers" menu and delete the original alpha channel layer so that the only layer left is the new one you just created. It goes without saying that you need a professional image editing application to create a picture with alpha channels. No Alpha – No Alpha channel will be saved. PNGs can have index color transparency (one color) or alpha transparency (multiple levels) useful for smooth shadow transitions over other images. Check top quality image masking service here. rgb = InputTexture. How can I do that?. Differentiate between objects and the alpha channel(s). Method 2: Colour to Alpha. Or share a video link showing these steps, if any. Grayscale with Alpha Channel. I did it, but the result is weird. Place an image with an alpha channel over a background This text is visible through the transparent image. Add Alpha Channel: An alpha channel is automatically added into the Channel Dialog as soon as you add a second layer to your image. Image Sequences with Alpha Channels. TIFF and PNG do. Many video and image file formats also support an additional alpha channel, which contains information defining areas of transparency. If used on a picture with a mask, it simply returns a copy of the current mask. As brothers of Sigma Alpha Epsilon, we strive to reach the highest standards of friendship, scholarship, leadership, and service throughout our lives. It specifies how the pixel's colors should be merged with another pixel when the two are overlaid, one on top of the other. Download premium images you can't get anywhere else. This is done by selecting Layer → Tranparency → Add Alpha Channel. 2+ of GIF Movie Gear supports just about the full APNG 0. I use arnold in c4d to render a massive images together with cloner, but the edges looks not right and really hard. Transparency (Alpha-Channel) In computer graphics, alpha channel represents transparency information of an image on a per-pixel basis. Actual image and expected output: Opened image:. To do so, we need to click on the fourth tab “ Effects ” directly above the Media Pool and select “ Video Effects “. If the image does not have an alpha channel, the alpha value of each pixel is assumed to be 1. If you don't need a video file, image formats with alpha channels can easily be used to create sequences when imported into your NLE. If you are interested in a detailed definition of a what is an alpha channel I got one from techopedia. This format not only allows transparent pixels, but semi-transparent pixels as well. Masks can be thought of as selections using some or all of the 256 available levels of gray, instead of a selection outline. The syntax of imread() function contains a second argument whose default value is cv2. Unlike GIF, which requires a particular color to be designated fully transparent, PNG allows the transparency of all pixels to take any value from fully transparent though partial transparency to full opacity. I have an image sequence with alpha channels. All the tools that work with grayscale images work with a mask, including vector tools. Click Delete Alpha Channel in Image menu. Image Sequences with Alpha Channels. Alpha channel An alpha channel, representing transparency information on a per-pixel basis, can be included in grayscale and truecolor PNG images. png with existing transparent alpha channel background. Create a new Surface that shares pixel data directly from the string buffer. Is there a simple way to add an alpha channel to an existing BufferedImage? Not for the general case. An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(). No matter whether you are new or experienced in Adobe Photoshop. I am assuming I cant do the following inside of Paint. The support post ‘FPDF error: Alpha channel not supported: when trying to load invoice’ is closed to new replies. To export an image with alpha transparency, you must have an alpha channel. To make an image transparent, it’s necessary to add an alpha channel to it. The RGBA button enables saving the alpha channel and is only visible if the image format supports alpha. Alpha is a type of data, found in 32-bit bitmap files, that assigns transparency to the pixels in the image. We're now using the EXR file's alpha channel as the background's alpha channel. Toggle navigation Image Abyss Alpha Coders. tif ortho_new. I did it, but the result is weird. 398 457 42. Some image formats support alpha or mask channels. Both images must have the same size and mode. Invert selection hit delete. To Create a 3 channel image of 400x200, you can use the following code. merge() to add the alpha channel to the given RGB image, but first you need to split the RGB image to R, G and B channels, as per the documentation: Python: cv2. Find alpha channel stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. 28 nanometers, deep in the red end of the visible light spectrum. The result produces a 32 BPP (Bit Per Pixel) transparent image. Alpha channel is stored in a separated plane (AlphaChannel). This channel is essentially no different than an RGB or CMYK channel, with 256 shades of gray representing the image areas. This will isolate the red channel, and your deep-sky image will appear black and white. WebPJS - Google's new image format WebP for not supported browsers (with alpha-channel) 07/04/2017 Libwebp JavaScript v0. Add an opacity channel to your project 2. Learn more about alpha. Make a selection in your image. Maybe you can comment on why matplotlib methods need to not save any alpha channel. (png with alpha channel trans) *What I want when I insert the picture is for the grass page background to show around the ball. An alpha channel is a grayscale channel where white represents areas of 100 percent opacity (solid), gray regions represent translucent areas, and black represents 0 percent opacity (transparent). Create a new channel from the transparency. Hello, I got two images source an alphaSource and I want to transfer the alphachannel of the alphasource to the source; So far I've gotten so far: using (var alphaReader =. In the Layer menu, select Transparency and then 'Add Alpha channel'. Photoshop's Bevel and Emboss works predictably: 1) Compute a distance transform in a temporary 8-bit single channel image. tif from the book's DVD. Watch full episodes, specials and documentaries with National Geographic TV channel online. net dictionary. Select a destination image in the Document drop-down menu (pop-up menu on the Mac). seems every time the clock, video or ticker updated, all the items on the screen went blank. On Wednesday 27 Mar 2013 23:21:33 you wrote: > Well I have to add that my suggested macro does not export > semi-transparency, but leaves the process of shadow-blending to > PowerPoint. The alpha channel of an ARGB image defines its transparency when it is composited with a second image. If an image contains an alpha channel, each image pixel is represented additionally by a numerical value which specifies the opacity of that pixel. In the first method, click on the Layer option at the top. Photoshop has one other type of channel: alpha channels. For instance, an image from a standard digital camera will have a red, green and blue channel. Actual image and expected output: Opened image:. To complicate matters further, we can add more channels. IMREAD_COLOR. Any help would be appreciated. To export an image with alpha transparency, you must have an alpha channel. Unfortunately not, but I believe this is ‘in the works’ – it’s a computationally intensive feature for browsers to support. Having the Real-Time Preview window for the Oxygen-III image open next to the Hydrogen-Alpha image also allows the user to visually gauge the brightness between both, for both their background and their nebulosity. In geographic information systems, channels are often referred to as raster bands. If an alpha channel is used in an image, there are two common representations that are available: straight (unassociated) alpha, and premultiplied (associated) alpha. You can create a new alpha channel and then use painting tools, editing tools, and filters to create a mask from the alpha channel. The image "only_alpha_channel. HOW TO CREATE AN ALPHA CHANNEL TO MASK OUT AREAS OF AN IMAGE : Stitched panorama images are often marred by the accidental presence of unwanted features. In InDesign the alpha channel works fine, so I know there is no problem with the image / alpha channel per se. VscorpianC 6,926 views. This will show the alpha channel of the current image. Channel letters can be mounted directly to the façade of the building or monument wall, known as a flush mount, or they can be mounted to a raceway. I have a Image with transparent part in it. Alpha channels are extra channels that are saved within a document. This is pre-release software and is supported by the ARM Team. In fact, if it is true that the image you have linked above is the same exact image you are using in your project, then that image DOES NOT have an alpha channel at all. How can I do that?. Create, Edit, Save, and Convert your images using this online image editor. To copy from A channel to ImageEn Alpha channel, call SynchronizeRGBA( True ); If UpdatePixelFormat is true, the PixelFormat will be set to ie24RGB. Or share a video link showing these steps, if any. This extra channel, the alpha channel, isn't visible but acts as a mask to make certain areas of the image transparent in software that recognizes alpha channels. I just love my boy girl hippity hop fanfics I come up with! I don't own ALL of them. Whether your business is early in its journey or well on its way to digital transformation, Google Cloud's solutions and technologies help chart a path to success. Make a selection in your image. Step 2: Add Alpha Channel. 3d small people driving the small car. Premultiply. If your image was premultiplied by color then defringe or remove black white matte but if it was not you dont need to do thism. Alpha channel support¶. ApplyMask Method. Alpha channel Informations Author: Valentin Schmidt License: FPDF Description This script allows to use images (PNGs or JPGs) with alpha channels. All colored image formats hold values for red, green and blue channels that make up the entire color spectrum, but certain formats offer the ability to retain an additional layer of transparency or “alpha channel” that is built into the file. Use form above to pick an image file or URL. The grey checkboard-like pattern shows the transparency of the image. Step 4: Again, in the Layer panel, right-click on the original image and select Add Alpha Channel. x extension is required. Download alpha channel stock photos. The problem appears when a certain image containing the alpha channel cannot be rendered by the software application that does not recognize the alpha channel. Before using image based transparency in Blender it's important to make sure textures have an "alpha channel", are in a format supporting the feature - typically rgb(a) TGA, BMP, TIF or similar, and that Blender can use said image. Image Overlay Using Transparency By Steve Eddins, MathWorks When we need to look at two images together—for example, to compare the input and output of a particular image processing operation, or to compare different images of the same scene—overlaying one image on top of the other is often more effective than viewing the images side-by-side. Click Delete Alpha Channel in Image menu. However, before you create a mask, you can save the current mask to an alpha channel in the image so that it can be reused. The key to Lens Blur is an alpha channel, a channel in the Channels palette that you use to control where and how strongly the filter will be applied. Have a question about this support post? Create a new support post in our support forums and include a link to this existing support post so we can help you. Images of all sizes and qualities welcome. Download alpha channel stock photos. I'm not familiar with Twitch channel settings but mae there is some other file format that can give you alpha channel f. But wait, the alpha should be inverted to work the way we want it to! There's no effect that'll simply do that for us, but luckily, there's an animation preset that does exactly what we want. Alpha channels are masks through which you can display images. Adelaide police say two men turned up to a victim's house with an eftpos machine. Glasses PNG alpha channel clipart images (pictures) with transparent background. PNG images can contain alpha (transparency) information. When it has one it should not be bolded. The Alpha Channel is this nifty storage area in your image's file for non-visible picture elements. Converts foreground image to premultiplied alpha format. I eventually succeeded in doing this and felt that a tutorial might help others who have not yet ventured into this area. Image Sequences can be used in vMix to create seamless looping animations with alpha channel. This is not valid in combination with bit value 1. If a source file with an alpha channel was imported without the alpha channel, the only way to restore it is to reimport, with. Alpha is a type of data, found in 32-bit bitmap files, that assigns transparency to the pixels in the image. I've tried that, but that seems to bake the alpha channel into the colour channels, then remove the alpha channel. In this exercise I'll show you how to save Alpha Channels along with your image…file here inside Photoshop. This will run much faster than pygame. Only the mesial face was interrogated. I have 3 images on my UI that are set at 0. Use form above to pick an image file or URL. The data inside an image may take on a variety of values depending on if the image is binary, grayscale, RGB, CMYK, includes an alpha channel, etc. Storing a Selection Mask as an Alpha Channel. Uses image's background color, and fully transparent pixels are transparent. Have a question about this support post? Create a new support post in our support forums and include a link to this existing support post so we can help you. A channel in this context is the grayscale image of the same size as a color image, made of just one of these primary colors. I've Googled and gotten lots of things about how to lock, but nothing on how to undo it. Sigma-Aldrich is a leading Life Science and High Technology company. If you are interested in a detailed definition of a what is an alpha channel I got one from techopedia. This can be done with the "RGB to Montage" plugin. In this post, I want to talk about how to add an alpha channel to RGB image and show it using the Pillow package. I have an image sequence with alpha channels. then came back I had to abandon the alpha channel idea and use just four image zones to encase the video with the images to look same a alpha channel. This is problematic because I have to use a 1 transparency value to retain my rgb channels. HOW TO CREATE AN ALPHA CHANNEL TO MASK OUT AREAS OF AN IMAGE : Stitched panorama images are often marred by the accidental presence of unwanted features. If an image contains an alpha channel, each image pixel is represented additionally by a numerical value which specifies the opacity of that pixel. It is suspected that Alpha Lupi is the beginning of a Viral Marketing Campaign (VMC) and possibly an Alternate Reality Game (ARG) designed to market the official public announcement of. mask_channel The channel the alpha mask video is played on. Maybe you can comment on why matplotlib methods need to not save any alpha channel. TGA) that has an ALPHA CHANNEL. Channel letters can be mounted directly to the façade of the building or monument wall, known as a flush mount, or they can be mounted to a raceway. Saving masks and alpha channels. PNG do only save transparency and not an alpha channel. When you add an alpha channel, PNGs allow for up to 64 bits per channel. Choose Select→Save Selection. 00 over 60 frames, or about 2 seconds, to the Set Alpha node. 398 457 42. This text is visible through the transparent image. [tvOS] Leaving empty app icon layer generates an image with alpha channel in the build. "Alpha" (real name unknown) is a main character and an antagonist first encountered in Issue 132 of Image Comics' The Walking Dead. How to change the Alpha channel of an image? Windows and Windows phone apps , Windows Phone Development > Developing Universal Windows apps. To draw by using the active color selection and leave the alpha value of the image in place, clear the Draw checkbox of the Alpha channel, and then draw. Alpha channels define a selection in black, white, and varying shades of gray pixels. Images with alpha-channel abstract: The tutorial describes how you can enable image processing with alpha-channels in blender. ” Some people say it is “opacity” (the opposite of transparency), but since the default is generally for a pixel to be fully opaque (that is, an image without an alpha channel will sim. with seeThru. If the active layer is the background layer and if you have not added an Alpha channel before (then the layer name is in bold letters in the Layer Dialog), the command is grayed out, inactive. At every pixel of the image, we need to combine the foreground image color (F) and the background image color (B) using the alpha mask (). Is there a simple way to add an alpha channel to an existing BufferedImage? Not for the general case. I am working with texture file so basically that layer is a data as the color channel, not something I am using to modifie my files. For colored images, each pixel is represented as an array containing Red, Green and Blue channels. 0, a copy of the second image is returned. It is used to determine how a pixel is rendered when blended with another. I use arnold in c4d to render a massive images together with cloner, but the edges looks not right and really hard. This can be done with the "RGB to Montage" plugin. Unlike GIF, which requires a particular color to be designated fully transparent, PNG allows the transparency of all pixels to take any value from fully transparent though partial transparency to full opacity. This allows the alpha channel to be represented more accurately than DXT5, but with less subtle transitions. Any help would be appreciated. x extension is required. To determine if an image has an alpha channel, look at the Format field in Image Information on the Image Import Options dialog before importing or at the Image field on the Object Info palette for a selected image. Where there is black, it is perfectly clear, like a transparent PNG. This works fine if loaded as a single file for each of them. All slides are detailed for GPU forensic image assessment. Is there a simple way to add an alpha channel to an existing BufferedImage? Not for the general case. Check out 🎆 Strucid (Alpha). (For example, if channel is "sprite", mask_channel defaults to "sprite_mask". And finally combine RGB channels and Alpha Channels together. If you aren't familiar with handling alpha channels, this is how to do it: 1. EECS Department, Northwestern University, Evanston,. In the example above, the alpha channel of the swirl image is ignored. I have 3 images on my UI that are set at 0. …Now you'll note that I'm still working along in the toolman. This will be the alpha channel. The Alpha Channel is this nifty storage area in your image's file for non-visible picture elements. Then, use the slider bar to adjust the percentage of transparency. Instead, a time node introduces a factor from 0. (Save a file with an alpha channel). Care to shed any light as to how I can accurately sample an image with an alpha channel?. (Save a file with an alpha channel). Find alpha channel stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. This will show the alpha channel of the current image. and different files alltogether, it's all the same problem. Now go to Channels tab and press on the Save selection as channel Icon - to create Alpha Channel from the selection. Select the form, and set its width and height equal to the width and height of the image. Best Answer: If it's disabled, that means there already exists an alpha channel on that layer. 32-bit graphics systems contain four channels — three 8-bit channels for red, green, and blue (RGB) and one 8-bit alpha channel. Alpha Manipulation, more commonly known as Chroma Key compositing is an effect that changes the background of the picture to a different background the editor may want. …I have unsaved changes as indicated by this asterisk outside of the parentheses…here in my Title tab. Open your file in an image editing software (gimp, photoshop, etc), delete the black background to make it transparent and save it again in a format that supports an alpha channel (JPG files do not support alpha, PNG, TIFF, OpenEXR do). Swizzling means to change the order of the color channels in a texture. Encapsulated PostScript. VscorpianC 6,926 views. Pull it gently down to the desired. A closed form alpha matting solution [20] can help to describe each edge segment in a unified way by alpha channel. bBlendOp The alpha-blending function for source and destination bitmaps, a global alpha value to be applied to the entire source bitmap, and format information for the source bitmap. Link to this page Print: Loading Sky Maps. If your image was premultiplied by color then defringe or remove black white matte but if it was not you dont need to do thism. You can export a file from Premiere Pro that includes an alpha channel (transparency). Now, I want to remove that transparent part from the Image and then copy it to another image I can directly copy the Image with transparency to another image but in performance perspective it may not be good idea. Related Images: isolated woman alpha mask silhouette digital art 250 Free images of Alpha. I have a list of instances that contain a cv::Mat image and a cv::Mat alpha/mask channel. Alpha=255 entspricht „nicht transparent“. Similar to the method proposed by Johannes, it also results in a one- plane RGB (or grayscale) image, not in layers that could be modified after using the plugin. To mask to an image's alpha channel: Position the image you want to use as the grayscale mask over the objects that are to be masked. putalpha(value) # set alpha to given value or im. Can't Make Home Games? Edit Image Gallery. Then, when I imported the file into photoshop, I would be able to select the outline of he object that was 'buffered' in the channels menu, and the alpha channel selection for that. At least Photoview creates an alpha channel that can be saved out along with the colored image. I am just wondering how to make filters such as glare override the alpha channel of an image? If I render an object, then go to the compositor and use an ‘Alpha Over’ filter to put the object over a background image, th…. I have applied a decal - a PNG file with Alpha/transparency channel - to a component and have enabled "use decal image alpha channel". I use extract band function (with parameter "1 1 1 2") in function chain of image service and it returns 4 bands as i want. That is fine for stencil and soft edged stencil work, but one can imagine a more complicated alpha channel that would be better served by JPEG. Try selecting two Channels at once. Fortunately, Photoshop makes it easy to merge alpha channels. It’s one of the millions of unique, user-generated 3D experiences created on Roblox. On Wednesday 27 Mar 2013 23:21:33 you wrote: > Well I have to add that my suggested macro does not export > semi-transparency, but leaves the process of shadow-blending to > PowerPoint. It doesn't preserve the alpha channel if I load a PNG file with alpha and then save it back out. GIF format supports transparency, it is a basic transparency type that does not use the alpha channel and should be avoided when attempting to save images containing alpha-based transparency. 3d small person standing next to a trash can. Hi, I am new to Unity. One of my helpers, Manic1265 owns one with Zeena and me, Here's the first fanfics I ever had published involving a ship between me and Neptune and me and zeena!. jpg" shows the resulting image as you would normally save it as png or jpg. In InDesign the alpha channel works fine, so I know there is no problem with the image / alpha channel per se. The alternative is importing your composition into After Effects which can take way too much time. Jpeg does not. When I try to sample a pixel, the alpha is always 255 or 100% opaque which is clearly not right. However, when attempting to render all the frames into any sort of movie sequence (. If image is grayscale, tuple. An eficient and simple Alpha Channel video, so just put your video bellow this one in editing timeline, and got it!. This works fine if loaded as a single file for each of them. Let's disable Eye Icon and. These images are actually 24 bit images that contain an alpha channel which makes them 32 bit format. In the case of FLV files, including the alpha channel just requires making sure that the Encode Alpha Channel box is checked. Alpha Channel Masking. In some applications an object may appear to be similar to an alpha channel but they really are two different things. In itself, the alpha channel is just a gray level image1. Command+click on the alpha channel’s thumbnail (or select the Alpha channel and click the little dashed circle at the bottom of the channels dialog “Load channel as selection”) Choose Layer > Layer Mask > Reveal Selection. The Cloud Alpha headset builds upon HyperX’s foundation of signature award-winning comfort with premium red memory foam, expanded headband and softer, more pliable leatherette. Alpha Channel Smoke vector images, illustrations, and clip art Browse 1 alpha channel smoke stock illustrations and vector graphics available royalty-free, or start a new search to explore more great stock images and vector art. Then, use the slider bar to adjust the percentage of transparency. Type the following in the command line (terminal): gdal_translate -b 1 -b 2 -b 3 ortho_old. Before using image based transparency in Blender it's important to make sure textures have an "alpha channel", are in a format supporting the feature - typically rgb(a) TGA, BMP, TIF or similar, and that Blender can use said image. View, download, comment, and rate - Wallpaper Abyss. Note: If at this point you get a messsage saying "No Alpha Channel available", you will need to create one. Note that the time curve is exponentially-shaped, so that the overall blackness will fade in slowly and then accelerate toward the end. Alpha Channel. However if I load them as an image sequence into a video layer/group, the alpha channel is gone. eTC-PCT 3D reconstruction of advanced decay. The benefits of our SR algorithm are three-fold: (1) By integrating the soft edge smoothness measure into an ob-jective function, the length of all image level lines can be. Use form above to pick an image file or URL. Here is image from Alienware Alpha R2 Review, posted by Dietmar Schlüter, on June 07, 2017, image size: 95kB, width: 1500, height: 1000, Alpha Wolves, Alpha Girls. Download alpha channel stock photos. Have a question about this support post? Create a new support post in our support forums and include a link to this existing support post so we can help you. Open demo of JPG with alpha channel. Images of all sizes and qualities welcome. However if the image already has an alpha channel present and enabled, it will do nothing. So, let’s do it. i'm creating some isometric images of buildings 'hovering' in space - no background. How can you tell if your image has an alpha channel?. Independent access to color and alpha channels. Switch to the channels palette. Adelaide police say two men turned up to a victim's house with an eftpos machine. create('#select', {mask:'#myMask'}); results in:. Memes, something to host, it's all great! Alpha Coders uses cookies for user experience, advertising. Image Sequences can be used in vMix to create seamless looping animations with alpha channel. Follow these simple steps for exporting graphics or elements with a transparent background (alpha channel) in After Effects. This tutorial shows how to easily create images that contain an alpha channel for creating partially transparent textures in game engines and 3d software. However if the image already has an alpha channel present and enabled, it will do nothing. getAlpha(), but all pixels have the alpha value 255. Unintuitively, alpha = opaqueness, so alpha = 1 means fully opaque while alpha = 0 means fully transparent. Command+click on the alpha channel’s thumbnail (or select the Alpha channel and click the little dashed circle at the bottom of the channels dialog “Load channel as selection”) Choose Layer > Layer Mask > Reveal Selection. However, you can create alpha channels to store multiple masks in an image. Color to Alpha. However, in early releases both -channel a and -channel o actually set opacity. How could I export that into a tiff file in order to import it into photoshop to work with it?. Choose Select→Save Selection. In graphics, an alpha channel is a portion of each pixel's data that is reserved for transparency information. Image (a) is the final blended image obtained by blending the overalay image using the alpha mask. The result produces a 32 BPP (Bit Per Pixel) transparent image. This image is not opened correctly, possibly due to alpha channel. After reading so much about creating alpha channel effects, you may have an urge to create a few pictures yourself. tif from the book's DVD. In programmer speak, this would be premultiplied and non-premultiplied alpha. An alpha channel is a type of mask. An alpha channel is a mask that is applied to the entire image (all layers) rather than a single layer. Very helpful for put trees in architecture projects, simple, and fast in the renders. So what is an alpha channel in Photoshop? Essentially, it's a component that determines the transparency settings for certain colors or selections. The alpha value is an integer from 0 to 255, 0 is fully transparent and 255 is fully opaque.