How to find out height of the charcter image where the pixel value not wqual to zero?

Hi

How to find the minimum and maximum position of pixel value that is not equal to zero? ie, I want to find out height of the character image when we segment the image into lines.How to solve this.Help me please...

Answer 1

[Matt J]

 [i,~]=find(image);

 height = min(i)-max(i) + 1;