Getting the pixel color of X,Y on an image

[richh]

I have an image that is 400, 400 and I am trying to get the color of the pixel at 200,200. I have been searching through the dictionary for a way to do this and now I am stumped.

thoughts on what i can use?

[Dixie]

Hi Rich...

Put this into the script of your image ... and, err... move the mouse around..

Code: Select all

on mouseWithin
   put item 1 of the mouseLoc - item 1 of the topLeft of me into X
   put item 2 of the mouseLoc - item 2 of the topLeft of me into Y
   
   put the mouseColor into thePixColor
   
   put X & "," & Y  && "/" && thePixColor
end mouseWithin

be well

Dixie

[kray]

I have an image that is 400, 400 and I am trying to get the color of the pixel at 200,200. I have been searching through the dictionary for a way to do this and now I am stumped.

thoughts on what i can use?

There are two ways - the shortcut (which only works if the image is visible, on screen, and not obscured by anything) and the more complex way:

Shortcut: Move the cursor to that location programmatically and then ask for the mouseColor:

Code: Select all

put the mouseLoc into tOldLoc
set the mouseLoc to globalLoc((the left of img 1+200),(the top of img 1+200))
put the mouseColor into tColor -- you'll use this, it's an RGB value
set the mouseLoc to tOldLoc

Complex: Examine the imageData:
See this tip for info on how to do that.

[richh]

I am very appreciative with how fast you both got back to me and I will take some time looking at your example code and trying to implement.

I will keep you both posted with how I make out.

thank you again

[jmburnod]

Hi Richh,

For an other way, you can look at the imagedata entry of the LC dictionary
(Poor frenchie, It is difficult for me to explain in English)

All the best

Jean-Marc