A tiny libary that can read/write/edit .BMP files from disk
It was a lib that can create bmp file, and print in it.
these is some demo with this lib:
it also contain some basic image processing functions.
I use a picture from pixiv by (ˉ﹃ˉ)EM1234 as following:
I have transform it to a bmp file named test.bmp,
Use this lib, I have made the following images:
In mathematics convolution is a mathematical operation on two functions to produce a third function.
As picture can treated as a function, we can run convolution operation on a picture, and this will produce magical effect
Firstly, let's try a Gaussian function, the Matrix(convolution core) is:
| 1.0 | 4.0 | 7.0 | 4.0 | 1.0 | ||
| 4.0 | 16.0 | 26.0 | 16.6 | 4.0 | ||
| 7.0 | 26.0 | 41.0 | 26,0 | 7.0 | ||
| 4.0 | 16.0 | 26.0 | 16.6 | 4.0 | ||
| 1.0 | 4.0 | 7.0 | 4.0 | 1.0 | ||
and this matrix produce this picture:
and then, let's try a matrix like this:
| -1.0 | -1.0 | 0.0 | ||
| -1.0 | 0.0 | 1.0 | ||
| 0.0 | 1.0 | 1.0 | ||
easily to find that this matrix will produce a gray picture, just like a sculpture:
a matrix like this will stress the edge of the picture:
| 0.0 | -1.0 | 0.0 | ||
| -1.0 | 5.0 | -1.0 | ||
| 0.0 | -1.0 | 0.0 | ||
To make a color inverse, you can use a matrix with the summary small than zero:
