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Which method will be called for descriptor matching with the following code matcher = cv2.DescriptorMatcher_create(2) ?

Question

Which method will be called for descriptor matching with the following code

matcher = cv2.DescriptorMatcher_create(2)
``` ?
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Solution

The method that will be called for descriptor matching with the following code matcher = cv2.DescriptorMatcher_create(2) is the Brute-Force matcher (BFMatcher).

Here's a step-by-step explanation:

  1. cv2.DescriptorMatcher_create(2) is a function in OpenCV that creates a descriptor matcher object.

  2. The argument 2 corresponds to the type of matcher to be created. In OpenCV, there are three types of matchers: Brute-Force matcher (BFMatcher), FlannBased matcher, and BruteForce-Hamming matcher. They are represented by the numbers 1, 2, and 3 respectively.

  3. Therefore, cv2.DescriptorMatcher_create(2) creates a Brute-Force matcher.

  4. The Brute-Force matcher is a simple descriptor matcher that matches the descriptors in the first set with the descriptors in the second set using a simple distance calculation.

  5. After creating the matcher, you can use the match() or knnMatch() methods to match the descriptors.

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