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### Given the 4 corners of two QR codes on a photographed sheet of paper, can we get a deskewed rectangular image?

The solution is to use an "homography" / aka "projective transformation" (see this PDF, page 16). Here is a working code showing how to do it with Python + OpenCV.
• 1,207

1 vote

### Corner detector vs feature detector

A couple of confusions here. Features refer to some form of lower dimensional descriptors that explain a (potentially local) region of interest. They are useful in converting the appearance into ...
• 5,225
1 vote

### Detect grid corner

Threshold the image to convert into binary image. Check whether it is a corner or not by dilating with these kernels separately on corners detected by corner detection. E_1 = \begin{bmatrix}0 & ...

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