Hi I am trying to execute HOG features from an image..

When i try to run the program.. mygradient requires more input arguments..!!! I tried to add.. I=imread('121.jpg'); before function statement..It says you cannot add nested functions here.. How to input the image for my function?? please help.

function [Fx,Fy]=mygradient(I) %correctig gradient on edges I=imadjust(I); [hcol,hrow]=size(I); temp= ones(hcol+2,hrow+2); temp(2:1+hcol,2:1+hrow)=I(:,:);

Fx=filter2([1;0;-1],temp); Fx=Fx(3:hcol,3:hrow); Fy=filter2([1;0;-1]',temp); Fy=Fy(3:hcol,3:hrow);

[Image Analyst]

http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup

Answer 1

[Image Analyst]

You can't have a function following a script in the same m-file. If your script is called test.m then you need to have

function test()

as the first line. It is okay to have two functions in the same m-file, but not a script and a function. Adding the function line converts your script into a function.

Answer 2

[Dima Lisin]

There is a built-in function for extracting hog features in the Computer Vision System Toolbox called extractHOGFeatures.

[SRIVATHSA PRADHAN]

Thank you very much Lisin..I was able to extract features of an image.