Is there anyway vb.net can use to extract image feature?

[TeiUKei]

I am working on a project that try to extract image color features. I wonder if vb.net can use to perform the function. If that is possible, can anybody tell me how to do it with any sample code?

[Lost User]

There are articles on here telling you how to do this. Christian Graus has done some very good articles (in C#) on how to access images pixel by pixel and apply filters etc. However this involves using pointers so is not really suitable for VB (take a look though as they are useful and show you the idea behind how you would go about doing what you want - the algorithms and methods at least). Check this thread: http://www.codeproject.com/script/comments/forums.asp?msg=2216444&forumid=1649&mode=all&userid=2578352#xx2216444xx There are picture box controls as well but they are not very flexible - check out msdn for info though as they may do what you need. Take a two step approach here - look at how to access the picture at a low level and then look at what you want to do once you know how to do this. Dan

[Dave Kreskowiak]

Of course, this all depends on what you mean by "extract image ... feature"??

A guide to posting questions on CodeProject[^]
Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
     2006, 2007

[TeiUKei]

Thanks 1st of all, what i mean by 'extract image color feature' is to extract the color information of the specific pixel. For example, the pixel of (20,30) of an 800x600 images which contain RGB value = 123 192 134. Once i specify the pixel, then the corresponding value will be given.

[Dave Kreskowiak]

Have you tried the Bitmap objects GetPixel method??

A guide to posting questions on CodeProject[^]
Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
     2006, 2007