Draw a straight line on a gray image and calculate the sum of the gray values on the straight line

Draw a straight line on a gray image and calculate the sum of the gray values on the straight line

[KSSV]

What have you attempted?

[tao wang]

Before, I exported the gray image into the form of matrix, calculated which points a straight line passed, and then accumulated the gray values of these points

Answer 1

[Jan]

This is a job fpr improfile .

[tao wang]

Thank you. I'll try