Template Matching Using OpenCV in Python

Question

I am a newbie in Image Processing and learning about Template Matching by getting some help from OpenCV documentation, but I didn\'t understand some lines of the code.
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Answer 1

Threshold = 0.8 works according to lightness on the image you are working on. If lights are proper on your image then threshold > 0.8 will work but mostly in camera images brightness varies so lightness > 0.65 can work. To match more points you have to reduce your threshold value.