Analysis of the replacement filter ("Stretching to fit" the replacement Law of the study) of the third

Filter

The displacement filter has several options when making a permutation. The substitution ratio is better understood, after selecting (extending to fit), there are two more options in the undefined area: repeat edge pixels and retrace.

An undefined range is an area other than a selection.

Let's do an experiment on the red channel first.

Make a replacement chart:

Displacement diagram:

Red channel:

Green channel:

Blue channel:

Gradient selection bar for red channel creation

1. Create a new file 400x400 a vertical segment on the diagram

2. Replacement ratio 10% Time replacement Result:

3. Replacement ratio 30% Time replacement Result:

4. Replacement ratio 50% Time replacement Result:

5. Replacement ratio 80% Time replacement Result:

6. Replacement ratio 100% Time replacement Result:

The relationship between the horizontal moving direction of the pixel and the value of the channel grey Order:

Red channel gray level (vertical direction)

Pixel movement and displacement proportional correlation-undefined zone-repeat edge pixel-change rule (undefined region, outside of selection)

Pixel movement and displacement proportional correlation-undefined region-retrace-change rule (undefined area, area outside of selection)

Here we have only experimented with the red channel, and from the above two graphs, we have an image understanding and understanding of the concept of undefined region-repeat edge pixel (and retrace).

The green channel also has a similar change in relationship. Interested friends can do their own experiments.

The analysis of the displacement filter ("Stretching to fit" the law of substitution) ended here. You are welcome to put forward your valuable opinions.

Due to the author's limited information on the filter, the research method is single, there may be omissions, but also invited industry experts and P friends to criticize!

Related reading: An analysis of displacement filters ("Stretching to fit" the study of Substitution law) bis