Compore two image and color the difference

[loranz83]

Hi all!!

I have i problem.

I want create with labview a rudimental video surveillance software wirth camera balser 602f ieee394.

Now, i want compare 2 picture, A and B and create an other image C whit the different pixel are red.

Example: in image A i have a table. In image B i have a table with a pen on the table.

I want an image C  with the pen totaly red colored (different pixel).

Can i use machine vision to create this app?? Please help me!!

[BruceAmmons]

Sure.  Store the initial image as a reference.  For each new image, use absolute subtract to take the difference between the two images.  Use a fixed threshold value that will ignore noise, and maybe do a little processing to clean up the resulting binary image (such as erode, fill, etc.).  Display the image using the binary palette.

Bruce

[loranz83]

Could you post an example please?? 

I have try but the resukt is wrong...

[wbadry]

Can you post samples of your image?

[loranz83]

I have resolved, thank you very mutch work fine!! It's possible color only a part of image, for example using roi?? I want select only a little part of image, for example the center, and make in that part the control of different pixel... I post here the program where i want add the roi function! Thanks all for help!