Hi, I have generated matrix of RGB values form image. How I can use elements of same matrix in same program for further operations?

Hi, with basic function, I have obtained pixel value in RGB format in matrix. I want to use different row values in same program.

[Simon]

Hi!

Can you show what you did so far? What do you want to do now? Of course you can use the rows of your matrix in the same program. What exactly is your problem?

[Shrikanth]

I have used impixel function to generate a matrix. This matrix will contain m by 3 values. 3 values are for red, green and blue respectively ranging from 0-255. I have tried to export these values in seperate xls file and import seperate cell value but didn't worked...

[Simon]

So the question is about xls reading/writing?

Actually, if you write and read again xls files, you should get the same data. Have you example files? Can you give your matlab code (only the part you have problems with) to reproduce what didn't work?

[Shrikanth]

well not exactly in problem with reading xls files. it was a way i tried....

The code is as follows;

I = imread ('C:\work\xyz.jpg'); P = impixel(I)

_This returned matrix as below;_

P =

   253   248   216
   255   222    33
   255   170     3
   246   110     2
   228    59    36

Now, i want to take just say values from very first row; i.e. r=253, g=248 & b=216 for comparision with other scaling unit.

Answer 1

[Image Analyst]

See the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

Probably the easiest way, though some people don't like it, is to just declare your variable global in all functions that need to access it. There are more complicated ways though and they are in the FAQ.