Check color of pixel and around it

djevazi

How to check the color of pixel and the color of pixels around this first pixel? For example i want to check mouseX and mouseY pixel color, and all the pixels colors which are located on the certain radius from mouseX and mouseY.

GoToLoop

Not exactly you're asking for, but this old forum thread got an example of circular image cropping: ~:>
https://forum.Processing.org/two/discussion/5618/crop-image#Item_26

djevazi

I will read this, thanks

kfrajer

If your image is loaded PImage object, after you display the image you can call loadPixels() and then you can get access to those pixels directly.

https://processing.org/reference/PImage.html

https://processing.org/reference/loadPixels_.html

You could also use the get() function. Check the argument options for this function:

https://processing.org/reference/get_.html

You could use color c = get(x,y) to obtain the color at pixel (x,y) or you could do:

PImage cImg=img.get(mouseX-1,mouseY-1,3,3)

to get a section of the image where you could then do the color checking. There are some examples in the video library under capture. Are you familiar with accessing the provided examples of installed libraries?

Kf