how to do horizontal projection histogram of an image

Can any one tell me how to do horizontal projection histogram of an image

Answer 1

[Rik]

You mean something like this?

 A=imread('pout.tif');%load image
 A=mean(A,1);%get the mean (or use sum or max) -  these convert the data to double
 histogram(A)%generate histogram

[DB]

Thank you sir ,

I got histogram but how to project the horizontal projection of an image particularly this image

can you please tell me how to do it ....?

[Rik]

There are 3 possibilities for a horizontal projection: a mean, a maximum value and a sum. The mean and the sum differ only in magnitude (and both convert your data to double). The projection convert your 2D image to a 1D signal, so you can use something like bar(A) or plot(A).