I used HOG and SVM to train and classify the charaters or numbers for OCR. Everything seems very good, I can get a label value after prediction, but as we know, I used multiclass for the charaters and numbers, such as,
number 0 label value (20)
number 1 label value (21)
number 2 label value (22)
......
character A label value (31)
character B label value (32)
......
When I used findContours to get a contour without chaarcters or numbers inside, I still got a value from prediction, 20 or something. What is the problem?