Resize image

<http://s1197.photobucket.com/albums/aa426/kodalibk/?action=view&current=RGBimage.png>

Hi,This is Nick.I found this pic some where in older posts.I had a pic same like this.I wanted to selct a pixel of size 100*100 or 50*50.

I have to do A) Define Mask size (Y*Y) square input in the code I used. B) Within each area,identify Blank area(white zone)-Brown Infill material (white in picture)-green identify shallow pores -yellow Rock-Blue.

Please give me one example or sample code to solve it.

Thank you, Nick

[Image Analyst]

I see red, brown, white, and dark gray. I don't see yellow, green, or blue. Are you saying that you want a binary image where white and brown are true (white, 1) and the rest of the colors are false (black, 0)?

[Nick ALan]

@ Image Analyst I wanted to select a pixel of size 50*50 and I have to apply colors for the picture which is similar like i am said before.I have to apply brown (white Blank area),White material as green,Shallow pores as yellow and Rock as blue.I have to apply these colors to the picture and I use the Mask size(50*50) in my code.Help me to apply these colors to it.

Answer 1

[Walter Roberson]

Y = 50;

findwhite = @(block) block(:,:,1) == block(:,:,2) & block(:,:,1) == block(:,:,3) & block(:,:,1) ~= 0;

whitefound = blkproc(basaltIMG, [Y,Y], @findwhite);

This uses the color definition that white is not black (all 0's) and that white has equal red, green, and blue values. A pixel with RGB of (1,1,1) will be identified as white, and a pixel with RGB of (255,255,254) will be identified as not white.

If you have your own private definition of "white" then implement it instead.

[Nick ALan]

@ Walter ROberson Thank you............