ghsv1.xcf (Size: 118.57 KB / Downloads: 237)
I made a color pixel degrayscaler tool for Gimp in 3.0.2/. It finds basic colors (R,G,B,C,M,Y) in hue,saturation & value of pixels prior to grayscale conversion
by looking at value of grayscale pixels & matching them to non-grayscaled pixels in above mentioned colors so they can checked for RGB & LCH channel values.



Gimp Color Pixel Degrayscaler Tool

What It Does

Finds basic colors (R,G,B,C,M,Y) in hue,saturation & value of pixels prior to grayscale conversion/full
color desaturation by looking at value of grayscale pixels & matching them to non-grayscaled/non-desaturated
pixels in above mentioned colorsfor checking the RGB & LCH channel values,plus how to colorize grayscale images using this tool.

File Format

Image is in XCF format.

How To Use

Download or save file,then open in Gimp  as XCF under the ghsv1.xcf file name (grayscale,hue,saturation,value for short)
After opening in Gimp,make two duplicate images & close original. Select second duplicate
image,click Image & convert to grayscale,copy grayscale duplicate & paste it
as layer in place to first duplicate image. Zoom to 1600%,scroll fully up
then fully left with eye on background copy layer off. Use horizontal
& vertical position scales in image window (top & left edges) & in bottom left of image window,
pixel position numbers with px selected. Image should appear as shown as follows:
Beginning at 0 vertical position,grayscale value stripe,(gray value of 0 to 255)followed by two hue stripes,
RGBCMY stripes for saturation,RGBCMY stripes for value. Color picker tool should be set
to example,foreground color with use info window checked. Use select by color &
click on position (horizontal image scale) of grayscale stripe value pixel matching
the position to locate value of pixel in your grayscale image as shown after
selecting background copy as highlighted. Make certain that select by color tool
is set to composite & threshold set to 0.0 with other options such as antialiasing
for example unchecked before doing above. Scroll right until highlighted selection areas
in stripes are seen.(ex.91,3 referring to horizontal & vertical positions
of selected areas) & select background layer if you're colorizing your grayscale image
after converting it to RGB,then use color picker in the mentioned highlighted selection areas.

Colorizing with Gimp Color Pixel Degrayscaler Tool


I devised a way to colorize grayscale images after duplicating & converting them to RGB.
It uses a checkerboard pattern in a 3 by 3 pixel image. Use File,New & set the vertical
& horizontal number of pixels to 3. Zoom to 1600% & scroll to upper left corner.
The three rows in the checkerboard pattern is follows: top row: RGB,
middle row:GBR,bottom row:BRG. Don't forget to set pencil/brush tool to pencil & pixel size to 1 for each of the nine pixels in the pattern.
You can copy the pixel colors from the top row with the color picker,then pencil, & use it with the pencil
for the middle & bottom rows of pixels. Next,set the ellipse/rectangle tool to rectangle & draw a 3 by 3 pixel
square around the pattern. Copy it then use the pattern image in edit to transfer it to the highlighted selection
areas in the RGB converted duplicate of the grayscale image you're coloring. To begin coloring the mentioned grayscale image,
zoom to 1600% as before & again scroll to the upper left corner & select the first pixel with select by color
& use the pattern image in edit as above. This is for Gimp 3 but can be used in the 2.10 versions.
To  separately change the red,green & blue pixels in the pattern,for example, click with color select on the red
pixels in the mentioned checkerboard using "Use select by color & click on position(horizontal image scale)..."
as above in the tool image & repeat the procedure for the green & blue pixels in the checkerboard. (forgot to mention
you need to use bucket fill set on fill whole image/selection when separately changing the red,green & blue pixel colors
in the checkerboard.


I hope someone can speed up this coloring procedure by automating what parts of it can be automated & doing things manually
for the rest of it. This is not an AI tool. For example I uploaded a solid red image converted to grayscale & some AI's,even online don't properly convert the image
to the correct color for R255,G0,B0 values.

some  "eye" symbols, indicating a layer is visible, have a background. what does it mean. how do i get rid of it?

can i change the line widths in all the layers within a group layer? 

for example, if i select a group layer and then select pencil and change the pencil width, will all the lines within the group layer change?
if not what do i do so that i can change all the lines in a set of layers?

thank you

I have a Jpeg of a line drawing. There are blue and red lines. I want to fill in the blue sections and change all the lines red and blue to black so I can make a Cricut cut file from it. Is there an easy way to do it?? I know it's a broad question....

I've attached the JPEG...


Jeff

Attached Files

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'lo everyone!

I'm new here, but not new to Gimp and I can use it to do a great many things.  But, one thing I've never learned to do is to manipulate a texture so that one or more sides / edges align with existing curves. 

I know how to align one to freely drawn curve, but not how to align one with a curve that is already defined so that I can match it without distorting the texture. 

The specific application, at the moment, is to add an edge of lace around the bottom of a dress.  The curve is part of a UV map for a dress for a 3d avatar, so it will be seen on all sides and needs to align well with the bottom of the dress fabric so it will look right from all angles.

Can anyone walk me through doing that, if it's possible?

Hi everyone,
I have an original photo and need it converted in the style of Shepard Fairey but to a more colourised version. 
Can anyone provide me with a simple step by step guide, PLEASE?
I would be most grateful. 
Thank you.

I'm on GIMP 3.0.2 on Windows 10. Whenever I use the File-Open or File-Export dialogs, the files and folders are intermixed and sorted counter-alphabetically. When I try to fix it by applying alphabetical sorting, it resets back to unsorted the next time the dialog is opened. Is this a bug?

i try to place guide lines in centimeters (cm) or millimeters (mm) but that doesn't work
i have been working with gimp for a long time on an amateur basis but i never knew how to set it. yes on precent but not on mm or cm
how can this be solved?
software of gimp is 3.0. 2 and runs on a windows 11

Hey hello. I've been using gimp 2.10.2 for a very long time. Just recently now updated to 3.0.2.

When used to work with older version, I used to paste lots of sub-images into the main one, to then right click in any empty space from main image to keep modifying pixels or adding up more sub-images, but here in v3.0.2 after pasting first sub-image, I get some small black lines which indicate to be the limit from new recently made "layer".

In v2.10.2 I didn't use to have this problem. Its not like there were made new "layers" when posting new pixels or sub-images to main image. I know there is a command named as "Merge down", but would like to know if there is some option to keep the same old behavior I used to have in older GIMP version.
It would be tedious to be pressed Merge down each time to add up a new sub-image to each one of the files that have to modify.

Dont know if its called other way around to make it automatic, so sorry about ignorance and thanks a lot in advance.

Hi, I am in GIMP 3.0.2 on mac book, works perfectly, I need to add to a selection, the search says To add to a selection in GIMP, hold down the Shift key while making a new selection with any of the selection tools, and the new selection will be added to the existing one.
I hold Shift and nothing happens, I think these searches are not made for mac. Thank you