Sir, how to find area & coordinates of white pixels in binary image?

How to find area & coordinates of white pixels in binary image?

[KSSV]

Attach image....have a look on find, regionprops.

[hemanth kumar.v]

I wanted to crop those white pixels & i did with the help of find function.. thanks sir

Answer 1

[Image Analyst]

To get all the rows and columns of the white pixels, you can do

[rows, columns] = find(binaryImage);

You'll get two vectors and a given index will give you the same pixel. For example to get the row and column of the 37th pixel, you can do

r = rows(37)
c = columns(37)

If you want to use x,y terminology, you can do

[y, x] = find(binaryImage);

because rows are y and columns are x.

To crop you can do

row1 = min(rows);
row2 = max(rows);
col1 = min(columns);
col2 = max(columns);
binaryImage = binaryImage(row1:row2, col1:col2);