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Digital Image Processing

How to write programs in Visual Basic to do the following intensity transformations:
1) Image negatives
2)Contrast stretching
3)Gray level slicing
4)Bit plane slicing
5)Histogram equalization
6)Low pass spatial filtering using 3*3 mask

CJ_S

You will need to use the API. You will need to write code that can examine each and every single pixel, and the pixels around it. I have done quite some digital image processing in C++, and can show you a simple sample in C++. (The functions are mainly the same as in VB, you will just need to add the appropriate API functions).

If you want I can send you an email with the sample...the code is in C++ though which is better for digital image processing in my opinion. I have the sample at home...

regards,
CJ

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inthedark

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inthedark

All you need now are the algorithms for:

2)Contrast stretching
3)Gray level slicing
4)Bit plane slicing
5)Histogram equalization
6)Low pass spatial filtering using 3*3 mask

The net is probably the best source for a solution to this:

e.g.

http://www.ph.tn.tudelft.nl/Courses/FIP/noframes/fip-istogram.html

inthedark

But CJ_S is right that C would be better for this job.

slider115

Check out this book:

Visual Basic Graphics Programming (2nd Ed), Hands-On Applications and Advanced Color Development, Rod Stevens

It has tons of algorithms (easy to advanced), including most of the one's you are looking for.

J

Emmiediana

ASKER

To all that have posted their comments regarding my question on digital image processing..thanx a lot!!
Anyway..i still need your help....:)

To CJ,
Could you please send me those codes in C++?? :)
I'm really looking forward to view the codes and study them...

To inthedark,
Thanx for the VB codes...
I've tried it out ...and now i got some ideas to do the other intensity transformations...
(Anyway,frankly speaking...i still find it difficult..
anyone can help me??? :) )
btw...thanx for the url address....

To slider 115,
thanx for suggesting me the book..:)

CJ_S

I tried sending them to you yesterday at work. But I got it returned... so I have send another email saying that your mailbox was probably full. I don't know whether you have replied yet, but i will see that on monday.... or else, give me your email addy again (which can take 1.2 MB)

Regards,
CJ

inthedark

In the previous example to make the image monochrome:

red = (reg+green+blue)/3
green=red
blue=red

col = RGB(red, green, blue)

Sounds like a fun project.