How to get pixel values in matrix form?

I am using the following code to obtain the values of an image which are greater than 80 using 3X3 window scanning :

clc

clear all

close all

X=imread('Test.jpg');

iwn=rgb2gray(X);

ind = 0 ;

for ind1 = 1:3

for ind2 = 1:3

if iwn(ind1,ind2)>80

ind = ind + 1 ;

pix_cor(ind,1) = ind1 ;

pix_cor(ind,2) = ind2 ;

%disp([pix_cor(ind,1) pix_cor(ind,2)])

X=pix_val(iwn(pix_cor(ind,1),pix_cor(ind,2)));

disp(X);

end

end

end

In command window X is displayed as

83

82

84

while in the workspace X is displayed as X=84

but I want X as an array i.e X=[83,82,84] in the workspace.

Please help me in achieving this

[KALYAN ACHARJYA]

Those pixels are less than 80, what you do.?

Answer 1

[KALYAN ACHARJYA]

I am using the following code to obtain the values of an image which are greater than 80

Just do the following one:

image1=imread('Test111.jpg');
grayImage=rgb2gray(image1);
mask=grayImage>80;
result_pixels=grayImage(mask)

[Avinash Bhatt]

this code is displaying all the values greater than 80 in the command window whereas only one value in the workspace which is the last value

[KALYAN ACHARJYA]

@Avinash Which pixel value you are looking for? No in workspace it shows the size of result_pixels. Doble click on the file you get the all pixels value which are greter than 80 in variables file.

Is it clear?

Answer 2

[Avinash Bhatt]

Sir,

This is the snapshot of what I am trying to do

when I am invoking for loop for extracting the pixels greater than 80 then in command window I have

83

82

84

while in workspace I get only 84 but I need the result in matrix as X=[83 82 84] for further processing

[KALYAN ACHARJYA]

Are you folloing my code or yours? In my code there id no for loop? I have written the code as per your question description. Share the code, which you have tried.

You have one image? Please note its alreadt in matrix form

Select only those pixels greter than 80

Then extracting the those pixels only which are greater than 80. Now the result cant have the same size matri, because you thrown all those elemnts which having less than 80.

Therefore you get the result in matrix (vector) having size 13878x1.

You can reshape the matrix.

Hope its helps!