Image comparison

Question

0.00/5 (No votes)

See more:

I have two images of BMP format. Need to compare the two and identify
the diffrence.

Content of image can slightly vary, height and width of image for comparison can be of different size.

Specifically looking for an ActiveX component or a DLL as the solution need to be integrated.

Not looking at file comparison. Comparison is needed specifically between two image files. The result highlight where the differences are in the image that is called for comparison.

If possible, the result should reflect in terms of percentage of success.

Posted 4-Mar-10 1:01am

chenchal

Updated 4-Mar-10 22:26pm

v2

Add a Solution

3 solutions

Add a Solution

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Teuz · Answer 1 · 2010-03-04T01:07:00

Solution 1

Bitmaps are simple (no compression etc) just check out the file structure and compare the images byte by byte.

Also, to check before comparing byte by byte, if bitmaps are the same I would calculate their hashes.

Posted 4-Mar-10 1:07am

Teuz

Updated 4-Mar-10 1:16am

v2

Eugen Podsypalnikov · Answer 2 · 2010-03-04T01:14:00

Solution 2

Any two buffers could be compared by memcmp(..)

(of course after the comparing their effective lengths) :)

Posted 4-Mar-10 1:14am

Eugen Podsypalnikov

DX Roster · Answer 3 · 2010-03-04T01:27:00

there is an built function available in .net for compare image that both are same or not...

or try following link

<a href="http://www.catenary.com/howto/compare.html">http://www.catenary.com/howto/compare.html</a>[<a href="http://www.catenary.com/howto/compare.html" target="_blank" title="New Window">^</a>]

<a href="http://www.theprogrammersweblog.com/2009/08/toggle-and-compare-images-using.html">http://www.theprogrammersweblog.com/2009/08/toggle-and-compare-images-using.html</a>[<a href="http://www.theprogrammersweblog.com/2009/08/toggle-and-compare-images-using.html" target="_blank" title="New Window">^</a>]

<a href="http://search.cpan.org/~avif/Image-Compare-0.2/Compare.pm">http://search.cpan.org/~avif/Image-Compare-0.2/Compare.pm</a>[<a href="http://search.cpan.org/~avif/Image-Compare-0.2/Compare.pm" target="_blank" title="New Window">^</a>]

Image comparison

3 solutions

Solution 1

Solution 2

Solution 3

Add your solution here

Preview 0

Image comparison

3 solutions

Solution 1

Solution 2

Solution 3

Add your solution here

Preview 0

Existing Members

...or Join us