JPGE Images

   uses
      jpeg;

   var
     jpg_file : TJpegImage;

   load the JPG image in this JpegImage and the convert to Bitmap using Bitmap.Assign(JPG_file) method. Now you have 2 Bitmaps which have Canvas propery and you can compare them.

    The other way is to compare the size, the headers, etc. but this don't guarantee you anything.

There are many algorithms for this purpos. it depends on your destination
(I mean your app usage) some of them compares RGB colors. it's a fast and trustable method. they compared the amount of each color not the pixeles and not the position of them. they also after getting the ture result from this test , they will test a little amount of pixels and their positions.

mbprogrammer,
I need a fast method! Could you post some codes how to do theat?


k4hvd77

have a look at here is good : http://www.catenary.com/howto/comparator.html

thank you mbprogrammer ;)


k4hvd77