Whenever I try to use the 'Colour to Alpha' tool, while it works on most of the image, I always get little white dots left behind, and have to spend ages use the eraser tool to get rid of them.
View 6 RepliesI had a .JPEG of a leaf photographed against a white background. When I went to turn that white background into a transparent alpha channel, it seemed to work okay....except for the fact that when I then went to select the new alpha channel via the Fuzzy Select Tool, it wasn't selecting all these newly transparent pixels.
View 6 Replies View RelatedWindows 7 and Gimp 2.8.2 in single window mode.
I am trying to to use Colour to Alpha by picking a specific colour from an image. But I can't get the colour picker to work.
The image has an alpha channel.
I choose Colour to Alpha, then click on the From swatch. The Colour to Alpha Colour Picker window appears. I click on the eyedropper. But when I move the eyedropper over the image, the cursor changes to the previous tool that was used. For example, if I used the zoom tool, the eyedropper changes to zoom as the cursor leaves the Colour to Alpha Colour Picker window, and zoom becomes active.
How do I pick a colour from the image?
1.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 2.8.4 Windows 7 64-bit
Using the native GIMP rotate function to rotate a rectangular image about its center (for instance) the corners of the image which are exposed by the rotation are set to RGB 0x000000 with an alpha value of 0.so that these areas are transparent.
If the same operation is performed as a GEGL operation the corners have RGB values of 0x000000 but alpha values of 255 - i.e. they are solid black.
Is there a setting to cause GEGL to use alpha values of 0 for these pixels? This also applies to GEGL operations such as shear.
I wish to impose an image on to another. a foreground image onto a background image. Hence for the foreground image I need the background (of the front image) to be transparent (alpha) which Ive done following this tutorial: [URL] .....
Note: the back colour is pure white (#FFFFFF)
However the issue arises that one of the people in the image is wearing a light blue shirt, hence when i follow the tutorial, it makes his shirt semi-transparent.
After much looking around i found this in the docs: [URL] ........
Which states: "It will attempt to preserve anti-aliasing information by using a partially intelligent routine that replaces weak color information with weak alpha information. In this way, areas that contain an element of the selected color will maintain a blended appearance with their surrounding pixels. "
However I dont want this, what i wish to happen is that anything is pure white is changed to alpha, and anything NOT pure white is left as is.
Hence it my understanding through the document quote above, the solution is to disable this ant-aliasing function as described in the quote
How can i do this?
the link to the pics [URL]
how do i get rid of white pixels in the background
I am using the threshold tool to create a stencil. I first used the Quick Selection tool to cut out the objects I wanted and then tried to use the Threshold tool to create a black and White Only image.
However, for some reason, especially on the edges of the objects, the threshold tool left some grey marks, instead of black and white.
I tried using the threshold tool again, but not all of the grey marks were removed
I need to create an outline map for another application. The world is demarcated into areas, separated by black lines. The map must only have black & white pixels.
Some questions about using GIMP for this.
1. Is there a tool I can use to make every non-white pixel black?
2. Is there a tool I can use to eliminate isolated pixels of the wrong color (that is for me a black pixel with all neighbors white or vice versa)?
3. Is there a tool I can use to make the black lines thinner? It is desirable in my application to have the lines be only 1 pixel wide
I rebuilt my line on white background from Rich2005 and Ofnuts. My latest version is darker, smoother higher res and wider (see attached).
The problem now are stray pixels, many of them unattached to the line itself. I spent a lot of time with an eraser, but still haven't gotten them all. THERE MUST BE A BETTER WAY!
I found this excellent link on the subject. [URL] RobA even has a script to do what I want. However, I don't think it is GIMP 2.8 compatible, as I can't seem to find it to run it.
For quite some time I've been trying to find the best way to remove a white background from images. I've checked out the sticky thread on this forum and as my image isn't of great quality and because it features quite a lot of white that won't apply.
Recently I found this tutorial which is supposed to work great (as seen in the comments). However, I think that because of a GIMP update that won't apply anymore somehow. I was hoping you guys might know what was causing it.
Everything works well until I get to step 7, where I have to select to Alpha. There it selects just the outlines, but my selection includes inner parts of the image, not just the background. And then after I invert and delete, the white that remains still has transparent parts that show up on the upper layer. So, am I doing something wrong with the Alpha to Selection, is that tutorial updated or is there a better way to remove the background from ie. a logo with just one background colour which isn't of great quality.
I'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.
i am trying to just colour her lips in
View 1 Replies View Relatedhow to change a colour or black and white photo to sepia
View 1 Replies View RelatedMy image is in grayscale though it's recognised as RGB. It contains structures in white which I would like to fill with a colour. So basically, I'd like for all the white in the image to show up as e.g. red.
How do I do that? I'm guessing it must be possible to have a red layer and somehow this will then fill the white, but I'm getting confused with background and foreground filling options and I don't know which transparency options I have to choose.
While trying to use cloning tool, it would leave a trail of white & would not clone the designated area! If I buy the full version, I don't want my money waisted on a program that doesn't work properly!
View 4 Replies View RelatedIs there some good way to do this when there are subjects that have many small features, sure as leaves or bird feathers? I have tried different selection methods and feathering, but always wind up with halos or sudden changes at the boundary, that necessite huge amount of detail work to get rid of,
View 27 Replies View Related2 days on GIMP. I need to adjust the clone tool so it's 1080 pixels vertical and about 20 pixels wide. I googled and searched, but I can't seem to find the right phrasing.
View 19 Replies View RelatedI am creating an image, mostly text and color. I want to create words with letters that have been turned cw and ccw, alternating. After that, I plan to flood fill the words. Unfortunately, I get some white inside where I flood filled.
View 14 Replies View RelatedI have a PNG image and like to edit the alpha mask. As there's no separate alpha layer inside the PNG image, but all pixels have a certain alpha value, I'd like to extract that with Photoshop. How can I do that?
View 4 Replies View RelatedIf I covert a font or shaped image under Bitmaps=>Convert to Bitmaps, I get a white solid background. In Corel x5 this would be a clear background. Also I can no longer Cover to Bitmap a photo then open with bitmap editor to create rectangles or ovals with clear faded edges. These are items I use all the time. How do I achieve this now. Also x6 will not save in x5 version. It will warn me of potencial problems then fail.
View 4 Replies View Relatedi made a animated Gif (Gimp 2.8) but there is something wrong.
i made an escalator with 2 persons on it, they move up the stairs in 12 steps.i made 12 different .XCF's for every step one.
Before converting to animated gif i make the XCF's 1 layer each.when i use the option FILTER > ANIMATION > OPTIMIZE (difference)the animated gif leaves black lines when the persons move (see picture attachment) the export file is very small so that's ok
When i use FILE > EXPORT > (=export as a animated gif) with the option delete previous frame, then the animated Gif looks fine. but the size is 5x bigger than when converting the first option ( i understand why)
how get rid of the black lines ??
I've managed to pixelate an image down to 128x128 pixels and have the amount of colours to 64.
However, I'm trying to get it that when I select a coloured pixel that all the other pixels of that colour are highlighted.
The magic wand seems to be the sort of tool I need but it highlights all colours/pixels that are similar; I want all pixels that have the exact RGB as the pixel selected.
My first real bump on the road is making realistic leaves on trees and bushes. I do not mean really realistic, but more cartoon style but good enough that it looks good. To give a idea of what I mean, look here.
When I try this I try with a paintbrush, but with a larger circle brush the result is to smooth and with a 1px brush it is to small?
I have just begun using Illustrator CS6. I have a very simple image (.png file) that I would like to annotate with some arrows and some text. This file is what I guess you would consider a raster image (no vector graphics) that has a very limited color range. It has less than ten basic colors plus a gradient fill (shades of gray) in a few places.
I want to use illustrator to annotate this image with some lines with arrows and some text, but first, there are a few stray lines that I would like to eliminate. For example, there is a black line that I would like to "erase" by replacing all the black pixels in this line with white pixels. I tried to do this by selecting the "Paint Brush" tool and then selecting white as both my fill and my stroke color. After doing this, I position the cursor over the pixels I want to change but the cursor appears as a circle with a line through it, and it doesn't do anything.
Ive been looking through various tutorials on how to create a mask that leaves the detail of the hair of the subject in
It seems all the tutorials I have looked at choose a subject with jet black hair, invert it, and hey presto, job done
Unfortunately, all my kids have got fair hair, and no matter what I try, find it almost indistinguishable from the background
How to do this, cos im losing my mind trying to paint strands of hair in and having the result look like Ive cut the image out of a magazine with a pair of left handed scissors (im right handed!)
Basically whilst using a tablet to draw the outline, i want to fill in the space with a colour. however, this leaves a pixellated edge around the fill, resulting in the piece looking far from perfect. how can i get around this without having to hand fill each individual pixel? is there any way to turn the sensitivity on my tablet off on the tool so that i just draw thick black lines instead of ones that get lighter around the edges?
i have included an example.
I have a project that requires a watercolor illustration to merge with a colored (imaged) background, so I need the white of the illustration to drop out. This isn't a Magic Wand, Select Color Range, or any 'selection' issue like that. I need a sophisticated color-to-alpha plugin that will render the white (or any color, I suppose), to transparent. Needs to be Mac compatible... seen some for Windows, but can't use them.
View 9 Replies View RelatedAny method to transform all the pixel of a colour similar to X(in RGB values) to X ?
View 7 Replies View RelatedI am working on a website that has existing template images. One of these in particular has a predominate blue background colour, specifically #0a2a35 (195 81 21 [HSV], 10 42 53 [RGB], 81 21 0 79 [CMYK]). I want to transform this colour to an orange colour, #be5d27 (21 79 75 [HSV], 190 93 39 [RGB], 0 51 79 25 [CMYK]). At the same time, I want to change the lighter and darker blue accent colours of the image to become variations of the orange colour.
I have tried several things already, and one method that almost worked for me was using the "Colorize" tool to match the HSV values of the blue colour to orange colour. It almost works except the RGB values don't quite match up.
png texture with alpha channel but the transparency seems to be white.
How do I let the transparency in the png texture look through to the background?(alpha blend)