difference image between two frames

[NicoVB]

How do you make a difference image between two frames...

 

i have one frame: an empty tennis court

 

another frame: a tennis court with a player

 

 

I want to get the difference ==> so the player should be visible alone now

in fact (all the pixels value from frame 2) - (all the pixels value from frame 1)

 

but how to do this??

 

thanks in advance

nico

[divil]

I think you'll have to go through the pixels checking. If you do this with pointers in C# it should be lightning fast. Check out the BitmapData class if you haven't already.

[NicoVB]

How do you make up then the new DIFFERENCE image?? (if you have all the values)

[ThePentiumGuy]

hey dude,

im not too sure whether you can do this in VB/C#, but on my TI-89 graphing calculator you can:

 

 

if you can somehow "Xor" 2 bitmaps/images (Xor is like an And or an Or) maybe it'll do it for you, but i highly doubt you can do this in .net

 

something like this:

 

playerstandingallaloneImage = tenniscourtImage Xor tenniscourtwithplayerImage

 

dont quote me on this(by the way if this method *does* work but it doesnt acheive theright results, try And or Or...

 

but dude im really not sure,

Pent