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Raspberry Pi By Example by Arush Kakkar, Ashwin Pajankar

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Arithmetic operations on images

In this section, we will take a look at the various arithmetic operations that can be performed on images. Images are represented as matrices in OpenCV. So, arithmetic operations on images are the same as arithmetic operations on matrices. Images must be of the same size in order to perform arithmetic operations with images, and these operations are performed on individual pixels .cv2.add() method is used to add two images, where images are passed as parameters.

The cv2.subtract() method is used to subtract one image from another.

Note

We know that subtraction operation is not commutative; so, cv2.subtract(img1,img2) and cv2.(img2,img1) will yield different results, whereas cv2.add(img1,img2) and cv2.add(img2,img1) ...

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