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Extract symbols from an image

Hi, I'm working on an android app that make some image processing by using opencv , I made a grayscale image, then Canny edge detection Like this photo : image description Now i need to get every symbol from this equation in a picture alone, How can i do that ?

Extract symbols from an image

Hi, I'm working on an android app that make some image processing by using opencv , I made a grayscale image, then Canny edge detection Like this photo : image description

Now i need to get every symbol from this equation in a picture alone, How can i do that ?