Image processing review and finishing (3. Image difference)

Puzzle points for image interpolation:

Never understand, the difference need not consider the circular boundary or the 0 boundary or something, but finally found that, think wrong, we need to consider is the pixel point between the pixels of the pixel value should have, so say, all the parameters have.

The main problems of image difference are:

1. Singular pixel-point processing
2. Image Amplification

One-dimensional linear difference value:

One-dimensional three-time difference value:

bilinear interpolation:

Double cubic difference (more difficult)

The objective function of the double cubic difference:

So there are 16 variables, so the partial differential, the whole differential, the value of itself is counted in

Image processing review and finishing (3. Image difference)