find the X-Y coordinate of the white pixels of the grayscale image using c#

[learningthings]

Hi!

I have a grayscale image in my pictureBox. I want to box up the white pixels in the image using the rectangle. Can anyone teach me how to write the code. Thanks in advance ..

Best regards,

[ddanbe]

What do you mean by I want to box up the white pixels in the image using the rectangle. ?
Coordinates start in the upper left corner with (0,0).
Y coordinates increase by moving down.
X coordinates increase by moving left.

[sknake]

Do you mean you want to draw a rectangle around area that have all-white pixels? This will work OK if the areas are in fact only rectangular but I highly suspect you will find jagged edges with white pixels. How should that be handled?

[learningthings]

What do you mean by I want to box up the white pixels in the image using the rectangle. ? Coordinates start in the upper left corner with (0,0). Y coordinates increase by moving down. X coordinates increase by moving left.

Thanks for the reply and apologize for my poor English language :)

Box up mean indicate with rectangles where the white pixels of the image are.

I have a gray-scale image in the pictureBox and I want to draw a rectangle on the white pixels of the image. Now my problem is i don't know how to get the X-Y coordinate and size of the white pixels of the image for drawing the rectangle on them. As i m a beginer in programming, could you guide me how can i write it in c#. Thanks in advance.

best regards,

[sknake]

Check out this thread:
http://www.daniweb.com/forums/thread215149.html

It does basically the same thing but uses a screen shot instead of a bitmap file. You can just change that section of the code out then it shows you how to find a pixel. After you have a working version of that code then post it up here and we'll go from there!

[learningthings]

Do you mean you want to draw a rectangle around area that have all-white pixels? This will work OK if the areas are in fact only rectangular but I highly suspect you will find jagged edges with white pixels. How should that be handled?

Yes, I want to draw rectangles around area that have all-white pixels of the image. The white pixels will be within the rectangle. How can i write it in c#. Thanks a lot for the reply.

Best Regard,

[sknake]

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