undefined function or method 'ocr' for input arguments of type 'unit8'

I am trying to recognize a letter inside the image, I read a .png file and wrote the code as

ocrResults=ocr(im,roi);

i got the error as follows undefined function or method 'ocr' for input arguments of type 'unit8' how could i fix the problem

[John D'Errico]

You MIGHT get that error for uint8 arguments. unit8 arguments are something that will be more difficult to solve.

[Sean de Wolski]

@John, probably the individual typo that I've made the most.

Answer 1

[Sean de Wolski]

ocr was released in the Computer Vision System Toolbox in R2014a so if you are on an older release or don't have CVST, you will have to upgrade.

Answer 2

[Azzi Abdelmalek]

Try

ocrResults=ocr(double(im),roi);

[kishore kumar]

i tried that one, i got the same error but instead unit8 i got double.