GIMP :: Colour To Alpha Colour Picker
Jul 26, 2013
Windows 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?
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Jul 20, 2012
I have recently upgarded from the 2.6 version to the 2.8, and I have serious issues with the colour picker. Every time I use the dropper to select the colour I want to use from a picture, it ALWAYS comes out as black, never as the colour I want to use (for touching up, etc).
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Jul 19, 2011
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.
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Jun 29, 2013
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?
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Jan 28, 2012
Any method to transform all the pixel of a colour similar to X(in RGB values) to X ?
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Jun 24, 2011
I 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.
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Aug 21, 2013
Why won't my colour picker appear?
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Dec 11, 2012
I am using PhotoShop CS5 and can’t select colours using the colour picker on different layers.This used to work but now I can only select the colours from the same layer?
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Jul 10, 2004
My colour pciker doesnt show the full range of colours in the side bar anymore like it used to. It only shows a small range unless I click on the edge in the main colour selection window then it shows the next range. How do I reset this back to the default?
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Jul 13, 2007
I have 2 Macs with Photoshop and one of them has the colour picker set to a "different" look. The colour field and colour sliders on my main 'puter are "normal" having a full spectrum of colour. But the other one shows only a narrow range of colour. Well, there is the whole gamut of colour but it is shown in a weird way. I've been through the preferences and nothing addresses this issue. The attached jpg has the weird picker on the left.
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Oct 20, 2011
When I want to use the "Eyedrop" tool to pick up the RGB value of a colour, and zoom in to pick up an individual pixel, the pixels change in colour to go with the shades of the picture. Is there anyway to expand the range of the tool to a greater pixel range to get the basic idea of what the value of the colour is?
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Jan 30, 2008
I use the alt button when using the brush in photoshop to quickly switch between the brush and colour picker, and it usually switches the colour i have chosen to the foreground colour so I can use the colour I picked with the brush.
but I think I pressed something or I'm not sure and it stopped doing that and I've restarted my computer and photoshop numerous times and it won't change.
what happens now is when I use the alt while using the brush the colour picker selects the colour but selects the colour for the background colour and leaves the foreground colour unchanged. =(
today I found if I click on the colour picker icon and click on a colour it'll select that colour for the background colour, but if I have the colour picker as my selcted tool and press alt and click it will set it as my foreground colour.
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Oct 2, 2013
Colour picker disappear all of the sudden?
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May 20, 2011
I was just trying to get a specific colour on a shader and the colour picker froze the UI completely.
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Nov 3, 2013
Recently, I started using Adobe Illustrator and watched many tutorials for the basics of it (coming from Photoshop) but one thing that I'm not too comfortable with is the gradient tool in Illustrator compared to the one in Photoshop.
I keep reading that the only way to adjust the colours is to either use the colours in the swatches or the mini colour slider but is there a way to choose the colours like you can in Photoshop?
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Jun 6, 2013
I've just updated my Photoshop (CS6) but now whenever I use it I can’t bring up the colour picker panel. When I try, Nothing happens and everything is else is disabled- I can’t click on tools, or layers, or anything from the dropdown menus. I can't even minimize or quit the program!I’ve restarted photoshop several times, restarted my computer and this still happens every time I click on the colour swatch to bring up the picker.
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Aug 10, 2013
When you convert a document into cmyk the colour picker still shows rgb. How do you pick colours using cmyk? Has it converted the pixel values into cmyk or has it kept it as rgb and somehow is converting these rgb values into cmyk for the screen?
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Dec 19, 2011
I have copied some colour negatives using my digital camera. What is the best procedure for removing the orange base colour of the film prior to converting them to positives?
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Jun 18, 2013
Whenever I create a new colour in the colour swatches it only stays there for a couple of actions while working on a project. I understand from others that once they create a colour it stays there. Why can't I get that to happen?
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Aug 11, 2013
How do I see the object selected change colour dynamically as I adjust the colour sliders?
It seems the object only changes colour when I release the slider. But I want to see it dynamically change, so I can find the colour that works best without "hit or miss" - "trial and error" behaviour.
Yes... I'm aware some of you spend hours in colour programs creating a palette to work with. Good for you.
I'm just wanting to do it LIVE. Dynamically. In 2013. In Illustrator.
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May 21, 2013
I am using CS6 and the Replace Colour Tool no longer allows me to replace multiple colours when I select the + . So when I have the panel open and I highlight the +, I used to then be able to click on several spots in my image and all of the colours that are in those spots are added to the selected colours that will be changed by using the sliders.
But now, when I use the + it has exactly the same effect as not using it - I can only choose one colour or an other, I can't add.....I want to reset this to the original way that this works.
Currently I have to open the panel, change one variation of a colour, save it, then re-open the panel and do it again (and again and again) until all the colour variations I am trying to remove are are changed. I know I also have the 'fuzziness' slider, but it does not give enough control.
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Aug 17, 2012
I'm just started using inventor 2013 (from 2010) & the way colours/materials are applied has completely changed so I'm learning again from scratch.
Here's my issue: A customer has sent a casting to me in Parasolid format. When I open it, all the unmachined surface are blue & look a bit garish. However, the colours of the machined faces are ok & I wish to keep them.
So, I want to chage all the surfaces that are blue - I can use the picker & select all the blue faces seperately (by holding CTRL down & select each face one be one) but this is a pain & takes ages (there are over 200 faces)
I can see & edit the blue color in the manager but how do I tell Inventor to replace all - can it be done?
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Jul 16, 2013
I use EdHarvey's colour tint tool and it changes colour of the whole image, I'm looking for something similar but it only changes selected colour, so that the image is left with mutiple colour scheme rather than just one, any addon that can do this?
From this example, you can see the figure on the right is in a brownish colour scheme, what tool can I use in order to make it's colour scheme blue like the figure on the left?
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Jun 11, 2012
[gradient tool] I double-clicked the colour stop , but the colour swatch doesn't come outI hv tried a couple of times in CS 5 and also CS 6.
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Aug 19, 2013
I am designing a T Shirt for my ski club.I have taken an image from a banner (made in illustrator, full colour image attached) and I want to devide into a 3 colour image for the t shirt (I am only allowed 3 colours for printing).The colours I want to use are black, white and purple. The colour of the t shirt is a light blue.I want to then put the purple logo on top of the white and black too.So I'm after a black and white grunge background with a punchy purple logo on the top.All of this should be on a tranparent or, for design purposes, light bue (same as T Shirt colour) background.
how to split a full colour image into using only 3 (4 including transparent/light blue background) exact colours.
If I were going to black and white I might convert to grey scale and then paint areas to fully white or fully black using an overlay brush I don't think this works for me for more than just black and white though.
I have attached two of my attempts where I used the colour range selection and level adjustments. Niether was really successful though (one does not use the right colours or number of colours but looks quite cool).
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Aug 10, 2013
I will like to find out the colour code for the background colour on a particular web address. Unfortunately I am new here so not allowed to post links so will say this as creatively as possible. the address is theregentlagos (with the usual prefix beginning with w and suffix beginning with c for all websites). I am referring to the colour where the menu items like logo, home, brands etc are on.
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Feb 25, 2004
I've been asked to convert an image to 2 colour for printing. I have the image as a full colour CMYK layout (with layers), but the whole thing needs to be converted to 2 colour. I have the pantone reference numbers for the 2 colours it is to be converted to. I am familiar with the hue/saturation tool, but this just seems to convert it to one colour, and you have no fine control over the exact colour you want.
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Jul 28, 2012
copy specific fill colour so that it can be filled in as stroke colour in other compound path. I attached 2 screen shots as below. I want to copy the blue olour to replace he red stroke.colour.
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Sep 12, 2013
I have photographed some colour negatives in RAW. Any outline of a process as to how to convert these to positives using Lightroom v5. I have tried and failed!
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Jun 4, 2013
I would like to be able to select a colour like you can in photoshop. The swatches are very limited. I would like to select it from the colour 'wheel', where you can move up and down the slider to select the value and then move over the circle to select your colour? Or where can I find a huge swatch of colours?
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May 23, 2013
Adobe Colour Management Print defaults seems to be assigning RGB meta to B&W pages and incurring Colour Print charges for B&W prints.I can manually change the print colour management to Printer managed on a per print basis instead of the default adobe colour managed which "cures" the issue but I do not seem to be able to save that setting as the default.
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