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Simple Desktop Application for projecting RGB values from an image

Posted on 2008-10-03
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Last Modified: 2013-12-14
I have  a programming trouble can you help me with this ?
 
I need a small graphical user interface which asks for a input which is an image (jpeg or bmp) and we need to supply it with an image.
It would calculate the RGB values for all the pixels and average (Some kind of mean; purpose is to confirm with an uniform value) and
it would look up in a table (the type of table is up to us it can be a text based, two coloumn or a comma separated file what ever)
and project the value(float or int) as the output.

Any idea or help
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Question by:thirst4truth
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6 Comments
 
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Assisted Solution

by:jvulliet
jvulliet earned 400 total points
ID: 22638579
Hello,

are you in unmanaged C++ or managed C++ (.NET)?

If you are in C++ .NET check the following code snippet to calculate average of image.
 OpenFileDialog^ odlg = gcnew OpenFileDialog();
 odlg->Filter = "Image Files|*.bmp;*.jpg";
 if (odlg->ShowDialog() == System::Windows::Forms::DialogResult::OK) 
 {
	 System::Drawing::Bitmap bitmap = gcnew System::Drawing::Bitmap(odlg->FileName);
	 long sumr = 0;
	 long sumg = 0;
	 long sumb = 0;
	 
	 for (int i = 0; i < bitmap.Width;i++) 
	 {
		 for (int j = 0; j < bitmap.Height; j++) 
		 {
			 Color color = bitmap.GetPixel(i,j);
			 
			 //Process the pixel here
			 Byte r = color.R;
			 Byte g = color.G;
			 Byte b = color.B;
 
			 sumr += r;
			 sumg += g;
			 sumb += b;
		 }
	 }
 
	 long totalpixel = bitmap.Width * bitmap.Height;
	 Byte avgred = Convert::ToByte(sumr / totalpixel);
	 Byte avggreen = Convert::ToByte(sumg / totalpixel);
	 Byte avgblue = Convert::ToByte(sumb / totalpixel);
 }

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Author Comment

by:thirst4truth
ID: 22639530
I am using un managed c++ then.

Well how to complie this peice of code?

How to give image as an input?
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by:jvulliet
jvulliet earned 400 total points
ID: 22640894
Just to know, which compiler and development environment are you using?

and what api are you using for user interface as well (MFC, Qt, Gtk...)?
Some of those have built in classes for images.
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Author Comment

by:thirst4truth
ID: 22641334
Iam using visual studio to complie it.

i dont know abt api

sorry for i have only intermediate knowledge in this subject
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Assisted Solution

by:jvulliet
jvulliet earned 400 total points
ID: 22658553
Which version of visual studio (6.0, 2003, 2005, 2008) are you using?

If you show me a little code example you use just to create a form I should be able to see which api you use (considering you use visual studio should be mfc or winforms, but just to make sure), then make you a little project which works.
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Accepted Solution

by:
thirst4truth earned 0 total points
ID: 22678155
Hello jvulliet

   i attached a screen shot of what i am using
as far as i know it is : Microsoft Visual Studio Express Edition 2008

thank You
cpp.JPG
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