horizontal and vertical projection of an image

Question

I am doing a project on image forgery detection in MatLab software. But I am new to both image processing and matlab.

Now I have to calculate horizontal and vertical projection of an image . How to do it in matlab?

I have used

ver=imfilter(edge1,[1 0 -1])

and

hor=imfilter(edge1,[1 0 -1]')

where edge1 is an edge image.

But i am not sure if it is right or not. Edge detection algorithm is based on the standard deviation. I have not used built in edge detection function. I have implemented standard deviation based edge detection.Can anybody help me on this . I need to know this very immediately. Thanks. Expecting your answers........

Answer 1

What is image projection? I think using and edge detector is NOT correct.

If I remember correctly image project is an "histogram over horizontal or vertical way of grayscale level".

If you need a projection of the edges you developed the first step.

Then, I think you have to sum over rows or columns the grayscale of image.

sum(image,1)

sum(image,2) 

here the projection of my photo (apologize fro my futility :)