GIMP :: B&W Image To Alpha Channel
Mar 21, 2012I have a B&W images. It's actually in RGB but all shades are gray. I would like to create an alpha channel whose values equal the brightness of each pixel. How do I do that?
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GIMP :: How To Add Alpha Channel To Image
Jul 24, 2011Thought I'd try Gimp on my new laptop instead of Photoshop. I'm making graphics for a game.
I needed to add an alpha channel to an image and edit it, including pasting into the alpha channel from the clipboard. Easiest thing in the world on Photoshop, but seems utterly impossible on Gimp.
I've looked at a few threads that discuss editing the alpha channel, and they make it sound like rocket science. Notable, most seem to involve juggline multiple other images and then following convoluted pasting operations to get anything down. Or using layer "Masks" which, as best I can see, are impossible to paste into (and I couldn't find how to convert these masks to alpha channels either.)
As it stands, I've failed to get anything onto an alpha channel at all, except some scribble that showed up in the tiny side icon but couldn't be seen in the main image.
I'm new to Gimp, and I'm hoping I've just missed something. What is the straight forward way to edit the alpha channel (drawing on it, pasting into it from the clipboard), and seeing the results at the same time. I've tried everything intuitive and nothing works.
GIMP :: Make Alpha Channel From Another Image?
Jul 27, 2011I have an existing (grayscale) image that I want to make into the alpha channel for another image.
View 11 Replies View RelatedGIMP :: Make Grayscale Image Into Alpha Transparency Channel
Oct 21, 2012Is there any way I can directly make a grayscale image into an alpha transparency channel?
I mean, NOT involving selection? Because selection by color to layer mask,is really difficult what I need to do the selection threshold.
Why is it easy to turn an alpha channel into a grayscale image but not the reverse?
GIMP :: Creating 32bit PNG Image With Alpha-channel Transparency
Dec 15, 2011I already have an image file in png format..which I want to use as an application launcher icon for my android application.
The android specifies image with following properties for the launcher icon(Will need 4 different image to support different screen size in mobile devices)
Launcher icons should be 32-bit PNGs with an alpha channel for transparency. The finished launcher icon dimensions corresponding to a given generalized
Screen density are shown in the table below.
1. 36 * 36 px
2. 48 * 48 px
3. 72 * 72 px
4. 96 * 96 px
I would like to create 4 png files(with specifications mentioned above) from the already existing image file. How do I do that in GIMP.
I am completely novice to image editing(Never touched any image editing software before) and not sure how to achieve this in GIMP.
GIMP :: Define Alpha Channel Color - Making Image Transparent
Apr 20, 2012There seems to be tons of threads on how to make a transparent image, but I haven't been able to fine one to do one specific thing.
How do I set the alpha channel to be black? I want to have a black background on a png file, but I need the black to be transparent to things behind it on a webpage.
GIMP :: Add One Image To Alpha Channel Of Other Image
Jun 6, 2011In short, I have two images open in Gimp. I need to add one the images to the alpha channel of the other image. How do I go about doing this? I was able to add an alpha channel but beyond that I am lost.
This bit will only make sense to 3D modelers. I have 3D model that I'm importing into a the Unity 3D game engine. One of the material shaders makes use of specularity maps. Normally the specularity map would reside in the alpha channel of the RGBA diffuse image, but due to file sizes, all these are released as separate jpegs. The idea is to make some parts of the 3D model more glossy as far as I know. The only way to do this is to add this specular image to the alpha channel of the diffuse image, and then the game engine can work its magic, making the skin look realistic.
GIMP :: How To Add Alpha Channel To 24 Bit PNG
Aug 12, 2013I have a 24bit PNG image to be used as a texture in my little game. I want to blend this texture with other colors which require it to have an extra alpha channel. I did some search online and tried some methods including add another layer and add transparency to the image, but neither worked(after I exported the image to png and reopened it, it still only contains 24 bits for every pixel).
View 4 Replies View RelatedGIMP :: 2.6 - How To Add Alpha Channel
Jul 17, 2013I'm using 2.6. How do I add an Alpha Channel?
I can't find it in the selections.
GIMP :: Invert Alpha Channel
Jul 12, 2013Is there an easy way in GIMP to invert the alpha channel of an image? Transparent should be opaque, opaque should be transparent, almost transparent should be almost opaque, etc.
View 4 Replies View RelatedGIMP :: Edit Only Alpha Channel
Nov 9, 2011I'm trying to create an image which emulates a solar corona (it's basically just a blurry circle). It's as easy as making one brush stroke in gimp, but my problem is that i can't get all the channels to be correctly set.
Ultimately i just want to edit the alpha channel, NOT the RGB ones. They should all be pure white, or 255, 255, 255. But for some reason, no matter how much masking or color selection or clicking only the alpha channel and not the RGB ones or anything that i do, i cannot keep the RGB white while editing the alpha channel, every stroke that affects alpha seems to invariably affect the other three.
How can i edit ONLY the alpha channel?
GIMP :: Adding Alpha Channel Grayed Out?
Mar 7, 2013My link but when I get to the part where it says to add the alpha channel - add alpha channel is greyed out in gimp.
I'm using Gimp 2.6 - windows xp.
GIMP :: Direct Editing Of Alpha Channel
Mar 21, 2012Is it possible to directly edit the alpha channel? I need to edit it for a 3D model I've made, and its showing up as too shiney (The engine is looking at the alpha for reflectivity).
However, I have yet to see a way to edit the alpha channel directly.
GIMP :: Add Different Information Into Each Channel Including Alpha
Feb 26, 2013Basically I need to be able to add different information into each channel including the alpha without the image being transparent at all.
Not to compare at all, but in photoshop i could work solely in the alpha channel without the RGB channels visible, then enabling the RGB channels would allow me to see the entire image without any transparency.
Basically, i want to be able to use the alpha channel for things other than transparency. For storing different masks in each channel for use in shaders.
GIMP :: Alpha Channel Automatic Setting?
Mar 8, 2013I know how to add alpha channel to each layer individually and manually but is there a way to have an alpha channel added to each new layer automatically?
I'm using 2.8.2
GIMP :: Unable To Unlock Alpha Channel
Dec 18, 2013I started using gimp yesterday to remove backgrounds out of images for my website so have done it fine.
But now I clicked on something which reduced the toolbox dialog box to not be as large - ie it does not show you pixels size etc if you select pencil tool now.
Also I open an image and lasso it - then click the quick mask but the pencil tool is not adding any more to the area - it wont draw over or anything. The lock alpha button is on in the layers panel and I cant unlock it.
GIMP :: Set All Pixels Below A Level As Alpha Channel
Jul 22, 20131.I am working on a project where I need to set all pixels below a level as alpha channel, is there a quick way to achieve this? The level can be both set a prior or adjusted dynamically, the second way is preferred. Right now my workflow includes:1. duplicate layer.
2. use color level in duplicate layer, in menu COLOR -> LEVEL.
3. add alpha mask to original layer
4. copy duplicate layer into the alpha mask of the original.
5. delete duplicate layer.
6. If result is not ok then return to 1.As you can see this workflow is a headache, specially point 6 which is often achieved.
GIMP :: Copy / Paste Alpha Channel - Texturing
May 18, 2013I have some textures, and i am trying to pack them into texture atlas. All of them are RGBA png's generated with PIL (Python Image Lib). I am opening all of them in gimp and copy-pasting them into their new place in texture atlas.
But i have noticed something strange, i am storing specular map in alpha channel of my diffuse textures, and emission value in alpha channel of normal textures.
The problem is, that GIMP does not copy pixels with 0 alpha value into clipboard. So, when i am trying to copy a normal map from source to atlas, and if emission value is 0, then GIMP is not copying anything, i am getting empty layer pasted into my atlas, if there are 0 alpha value pixels in diffuse map they are not copied to destination, even selection outline shows that there are no pixels in places where specular is set to 0.
GIMP :: Bucket Fill Effect On Alpha Channel
Dec 17, 2010I have a PNG logo that has anti-aliased letters on a transparent background. In other words, all pixels are white (for example) and either 0% transparent (in the letters) or semi-transparent (in the anti-aliasing). The rest of the image is transparent.
What I'm trying to do is take change the color of the logo. Bucket fill in normal mode changes the alpha value of the semi-transparent pixels to 0% transparent when applying the color--so I loose the anti-aliasing. I did manage to get what I want with bucket fill mode Darken only, but this only works for certain colors on certain other colors (I can change white to any other color, but not vice versa).
Is there a straightforward way to fill a color while keeping the alpha channel intact? I tried all the modes, and also modifying the Fill transparent areas, but don't really understand them to figure out if one does this in the general case.
GIMP :: Put A Pattern Around Object That Needs Alpha Channel In The Middle
Apr 7, 2013I'm trying to put a pattern around an object that needs alpha channel in the middle, but when I make a new layer and add the pattern, then select the area and use "Color to Alpha" it doesn't work. The pattern in that area is only turn slightly darker, not alpha channel.
View 1 Replies View RelatedGIMP :: Using Selection Deleting To Transparency Via Alpha Channel
Dec 12, 2012I have removed the background from a photo using selection deleting to transparency via alpha channel. My dog was left. I then exported to png. When I try to upload the dog to use in a label, (Open Office), the back ground turns to white.
What am I doing wrong?
3ds Max :: Alpha Channel Not Cutting Out Image?
Nov 6, 2012I'm using Xfrog trees (first time, and quite new to 3ds max design 2011).
The leaves are images laid onto planes. The leaf has a white background and is precreated to be transparent etc.....
In theory i should be able to import the tree, render and everything should work. it's not working. The tree renders with the white background to the leaves
Is there a setting i'm missing, maybe in the render setup?
AutoCAD Certified Professional
Win 7 Pro 64bit, Dell Precision M6500
Paint.NET :: Use One Image As Alpha Channel Of Another
Feb 12, 2013How do I take say the black and white version of an image and use the final grey scale value as the alpha value for that pixel on the original? Is this possible to do easily?
If not, what's the hard way?
GIMP :: How To Perform Basic Editing Of Alpha Channel Layer
Dec 26, 2012For years I've been using various image editors, often in combination. That is, I do simple stuff as copy / paste and repositioning of elements in one editor and subsequently open the image in a more advanced editor for proper paintwork. Currently I'm using the Gimp for the latter. Color layers work brilliantly. However, I have big problems with my alpha channel--I've found no way to edit it within Gimp and I've found no way to import a revised version that I've edited in another image editor. There must be solutions to both challenges.
The editing I require is piece-of-cake in basic image editors--I simply want to move a transparent region a bit to the left. That should be a simple rectangle selection and then shoving it (mouse or arrow keys) to where I want it. Alternatively I could import my edited alpha channel image as I'm used to doing in other editors. Well, the Gimp will accept the image as a layer all right but I haven't succeeded in making the Gimp import my grayscale image as an alpha channel. I get a grayscale non-transparent layer instead.
So, I've got a perfectly good alpha channel that needs a minor tweak. It loads as intended in Gimp. How to perform basic editing of this alpha channel layer or tell me how to import a revised version and tell Gimp that this image should be interpreted as an alpha channel?
GIMP :: Batch Process - Decompose Alpha Channel And Save
Nov 6, 2013I have a series of images with alpha channels what I want to separate out from the images and save as a new file with a filename suffix.
For example I have a series of folders containing thousands of images:
These files are filename.dds files (I already have the .dds plugin to read them but you could use .png for example).
I load the image, goto Colours - > Components - > Decompose :
In the dialogue I enter color model : Alpha, tick decompose to layers - > OK
I then export the file as filename_a.jpg
Is there a way to batch this process for the 1000's of images I have?
GIMP :: How To Make Black And White Alpha Channel For A Video Game
Jan 31, 2013I'm trying to make a texture for a model in a video game, and I want some of it to be transparent. This is done by editing a text file that tells the model to use the textures alpha channel. things in the alpha channel that are white are transparent and things that are black aren't.
But I don't really know how to edit the textures alpha. Here is a video I've seen that explains how to make one in photoshop: [URL]......
How to do exactly what he does in gimp? whenever i duplicate one of the rgb layers, it isn't black and white like it is in ps. i'm also not sure how to have it turn into the alpha.
Photoshop :: What Does Controls Quality Within Image By Using Alpha Channel Mean
Oct 2, 2012simple terms the following options in the JPEG2000 dialogue box :
-Wavelet Integers and Float. Explain wavelet in idot proof terms? What is the difference between the two types of wavelets?
-Tile size. What does it refer to when it says Tile? What's a tile in this instance?
-Region of Interest. What does "controls the quality within the image by using an alpha channel" mean?
Paint.NET :: Black And White Image - Use As Alpha Channel
May 17, 2011I was simply wondering the best means in Paint.Net to use a black and white image and use it as the alpha channel of my image, with white being opaque and black being fully transparent. I looked through the plugins on the site and didn't see anything that seemed to resemble what I was after.
View 2 Replies View RelatedPhotoshop :: Alpha Channel Issue For Making Transparent Image
Jul 2, 2005I have an image and i'd like to turn that into a transparent gif/png file for a website (has a changing bg color at random). The thing is i don't know how do this, and could use some help. What I tried so far is that I add to the original image an alpha channel which is the original image inverted, but that did not show me the checkered bg.
Anyway I added a faked impression of what i want to achieve. Thanks for any tips on how to make this work.
Photoshop :: Add An Alpha Layer Or Alpha Channel To A Bitmap And Save In BMP Format
Jan 7, 2008im trying to add an alpha layer or alpha channel to a bitmap and save in BMP format.
I am using Photoshop 6.
Photoshop :: Alpha Channel :: Make An Alpha Tga File?
Jul 23, 2005can someone tell me the easiers way to make an alpha tga file? Photoshop 7 can done alpha when i save to tga 32 bits, but in CS we have to do it manually...
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