Isolating individual numbers from image for OCR

Question

The method to perform character recognition for single digits its pretty easy. But this is when the image only contains ONE digit.

When the image contains multiple digits, we can't use the same algorithm since the entire bitmap is different. How do we process the image to split it, so we can "modularise" the OCR operation on each of the individual digits?

Answer 1

Follow the following steps:

1. Load the image.
2. Select the digits ( By contour finding and applying constraints on area and height of letters to avoid false detections). This will split the image and thus modularise the OCR operation you want to perform.
3. A simple K - nearest neighbour algorithm for performing the identification and classification.