Template Matching in OpenCV

• Template Matching is a method for searching and finding the location of a template image in a larger image.
• It is one of the simplest forms of object detection, where a template is basically slided over the reference image to find if there is a match.
• OpenCV provides a function to find matches, known as

    cv2.matchTemplate()

Reference image

Template image

Comaparison of different template matching methods

• OpenCV offers various types of methods that aid in template matching, their working can be observed as follows

Method	Template Matching
cv2.TM_CCOEFF
cv2.TM_CCOEFF_NORMED
cv2.TM_CCORR
cv2.TM_CCORR_NORMED
cv2.TM_SQDIFF
cv2.TM_SQDIFF_NORMED

• Among the above mentioned methods, we can clearly say that cv2.TM_CCORR doesn't provide an accurate match

Author

Rohini Rao