error - Undefined function 'extractHOGFeatures' for input arguments of type 'double and Undefined function 'detectMSERFeatures' for input arguments of typ ,

even if the Image processing toolbox is already installed then why unable to access the below functions.Undefined function 'extractHOGFeatures' for input arguments of type 'double Undefined function 'detectMSERFeatures' for input arguments of type 'uint8'. Requesting help - Thanks

Answer 1

[Steve Eddins]

These functions are in the Computer Vision System Toolbox.