number of pixels versus y-axis of an image

I have a binary image and want to plot the graph like this and find out the standard deviation of the image. how can i do this?

[Image Analyst]

You need to explain what those profiles/plots represent.

[Jorge Mario Guerra González]

Yes, try to explain in a better way what your question is.

Answer 1

[Image Analyst]

I have no idea what your plots mean or what pixels they are counting, but to get the standard deviation of a gray scale image, do this.

stDev = std2(grayImage);