HOG Descriptor function Error

Hi can any one help me i am running the function HOG but getting an error which is

??? Input argument "Im" is undefined.

Error in ==> HOG at 11 [L,C]=size(Im); % L num of lines ; C num of columns

you can find the function from the link below. http://www.mathworks.com/matlabcentral/fileexchange/index?term=tag%3A%22i+run+your+code%22

[Walter Roberson]

More directly, http://www.mathworks.com/matlabcentral/fileexchange/28689-hog-descriptor-for-matlab

[Algorithms Analyst]

they didnot solve it.

[Algorithms Analyst]

My dear this is still not working for grascale image how to call it ?

Answer 1

[Walter Roberson]

How are you invoking the code? Are you passing in a grayscale image

Im = rgb2gray( imread('YourFile.jpg') );
hog(Im)

[Algorithms Analyst]

Thank you for your response..I am applying the function on a rgb image but I am not finding any result and getting the error

here is my code A=imread('lena.bmp'); X=HOG(A); imshow(X) when I apply the function imshow the window appears but no results..Solve it plz..Its very urgent or can we apply it on a video clip?thanks

[Algorithms Analyst]

give me some suggestions Mr walter.

[Walter Roberson]

The function is not defined for RGB images. Read the first line of the code where it says "grayscale".

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency