Script to produce B&W image with a colour cast

[david]

After Tim's writing of my luminosity script, I decided to attempt a script of my own.



Having selected a foreground colour in GIMP, running the script produces a black and white image with an overlay of the foreground colour (which does not colour true blacks or whites, only the grey tones) and an overlay created from threshold which can emphasise black and white. Both of these can be adjusted by changing the opacity of the layers.

The script can be found under: Python-Fu/Desat with Colour Cast...

As always comments and criticism welcome!

david.

EDIT: Script has been modified to allow colouring of greyscale images (amended version below)

[Pat625]

Thank you David. I will try it but not immediately as some problems Have developed with my computer.

[Steve Reid]

Thanks for this script David, a useful addition to my scripts folder
I'm always interested in reading scripts to see how others think and code

I'm still using gimp 2.8 so had to tweak a couple of lines. Your script worked as in your description on RGB and RGBA images but not GRAYSCALE images

The line of code "RGB*, GRAY*" in the register allows the script to run on GRAYSCALE images, is it meant to on gimp 10, if so to what ends

More often than not the PF Option (PF_COLOUR, "colour", "colour", (255, 0, 0)), would be used to get the script to ask for colour input rather than setting the foreground colour before running, Not a criticism, it's the coders choice

welcome to the addictive world of scripting

steve

[Issabella]

David, Congrats! You have become a creator of codes.
Thanks for your script, it works great and makes it so easy to use.
My first try. I used foreground colour 090985

[david]

Steve Reid,

Thanks for your comments - you spotted my mistake!!!

Script has now been amended in first entry of thread (above) to permit colouring of greyscale images.

david.

[Issabella]

My other try, using a different colour.
Thanks David.

[david]

Issabella,

Looking at your images - did you select a foreground colour before running the script? Because both your photographs are totally black and white.

Using the selected colour I get this result. (This is before any adjustment to the opacity of the layers.)

david.

[Issabella]

David, thanks again for your help. Yes, you were right I didn't apply your script correctly. Sorry.
My other try.

[Issabella]

I'm not able to upload my images. It seems to have changed the layout of the forum, is it correct for you all or it is only for me? Thanks.

[Steve Reid]

Not only you Issabella, forum looks different and I can't upload images either

steve