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How would I get pixels information based on a selection using GIMP (or any other software)?

For example, just like in PS I want to select a specific region of the image and have information about its pixels (and if can, compare it with another table/values/image selection)

Thanks.

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    Hi. Welcome to GDSE. What specific kind of pixel information? Do you mean the pixel dimensions of the selection? If so, click Windows > Dockable Dialogs > Pointer – Billy Kerr Feb 23 '20 at 14:35
  • @BillyKerr I want to export a remap table (pixels map) to a file, how? – user149088 Feb 24 '20 at 13:42
  • Do you mean the Colormap dialog? Windows > Dockable Dialogs > Colormap. – Billy Kerr Feb 24 '20 at 13:51
  • @BillyKerr could be. Actually i want to export the colors to a .txt file. What i'm interested in is their values in hex (or anything at all!) – user149088 Feb 24 '20 at 13:54
  • I've added an answer now that you have clarified what you actually want. – Billy Kerr Feb 24 '20 at 14:21
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Assuming you have an image in Indexed colour mode*:

  1. Click Windows > Dockable Dialogs > Palettes

  2. Find the "Colormap of image" you are currently working on

  3. Right click it and choose Export as > Text File

The resulting text file will contain all the colours in the palette in hexadecimal.

enter image description here

*Note: If the image isn't in Indexed colour, convert it by clicking Image > Mode > Indexed.

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  • Thanks so much!, but i don't understand. i opened the palette panel and i don't see the selection. – user149088 Feb 24 '20 at 14:35
  • There is no "selection". The palette contains all the colours in the entire image. If you wanted just a small portion, I think you'd need to convert the mode to RGB: Image > Mode > RGB, crop the image to just the part you want to analyse, then do Image > Mode > Indexed, then find the palette and export it as text. Once finished you could just undo all the changes (Ctrl+Z) to reverse the crop, etc. – Billy Kerr Feb 24 '20 at 14:37
  • YES!!! that's what i needed, thank you so much! – user149088 Feb 24 '20 at 14:43
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In Gimp

  • The Histogram dialog will tell you most everything you want to know about the pixels in the selection (or the whole layer if there is no selection). You can also obtain the count of pixels in a given value range.

  • The Pointer dialog will tell you the pixel value for the pixel under the pointer using various color models (RGB, HSV, LCh, LAB...)

  • The Sample points dialog does a similar thing simultaneously for up to four pre-positioned points.

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  • Is there a way to save the selection as pixel data? – user149088 Feb 24 '20 at 13:44
  • What do you mean by "pixel data"? or is this the real question? – xenoid Feb 24 '20 at 14:33
  • i'm really sorry for asking twice for same purpose. But i would like to keep the question in here – user149088 Feb 24 '20 at 14:36

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