Search found 5 matches

by RichardB
Monday 19th March 2018 10:30am
Forum: General
Topic: Individual color values of a pixel?
Replies: 8
Views: 1134

Re: Individual color values of a pixel?

Thanks again to everyone. And particular thanks to Gianluigi for his solution (exactly what I was after!) and to vuott for posting it here.

-RB
by RichardB
Friday 16th March 2018 8:43pm
Forum: General
Topic: Individual color values of a pixel?
Replies: 8
Views: 1134

Re: Individual color values of a pixel?

Thanks for everyone's help. I'm away from my computer at the moment but I'll test out your suggestions when I'm back home.

-RB
by RichardB
Friday 16th March 2018 3:21am
Forum: General
Topic: Individual color values of a pixel?
Replies: 8
Views: 1134

Individual color values of a pixel?

Hi folks: How do I extract the integer values for each color of an image pixel? If I have an image called "test_image", and can read each pixel as "test_image[x,y]", how can I extract the integer value for each of the red, green and blue channels for that pixel? (The documentation is a bit vague on ...
by RichardB
Monday 05th March 2018 10:41pm
Forum: General
Topic: Image manipulation
Replies: 7
Views: 997

Re: Image manipulation

Hi all, and thank you for the welcome. I really appreciate everyone's help, and special thanks to steve - that looks like the sort of solution I've been chasing. Unfortunately I'm at work at the moment, so I won't be able to test out your code example until I go home. I'll let you know how it turns ...
by RichardB
Monday 05th March 2018 12:14pm
Forum: General
Topic: Image manipulation
Replies: 7
Views: 997

Image manipulation

Hi folks. I'm trying to write a piece of code to perform some image manipulation - specifically, to mathematically subtract one image from another, and display the result. (The program aims to show changes in ground movement over time using aerial or satellite images.) I'm not having much luck in fi...