Could i reverse the color of object with background ?

i want to ask, could i change the color ( reverse ) the background color with the object color ?

for example :

<a>[URL=http://imageshack.us/photo/my-images/8/ricef.png/][IMG]http://img8.imageshack.us/img8/101/ricef.png[/IMG][/URL]</a>

Uploaded with [URL=http://imageshack.us]ImageShack.us[/URL]

Answer 1

[Walter Roberson]

Sure. If your image data is in the range 0 to 1, replace each pixel value by 1 minus the pixel value. If your image data is in the range 0 to 255, replace each pixel value by 255 minus the pixel value (but make sure the output is the right data class.)

[danny agus]

hmm

i have tried this code

I2 = I - background

which is the background is black color

and the I = original image

and the color is averaged

how i can replace the pixel ?

i replace it one by one ?

or can i do it with one step ?

i already fix the image

u can see the image