Simple image editor (simge) is a program which provides images editing, manipulating and filtering. Program has been written in C language. However for image compression and decompression purposes some python code has been used.
Program requires incoming dependencies:
- linux operating system with gcc compiler (e.g. windows subsytem for linux),
- python 3.8 with python3.8-dev package installed,
- python Pillow library.
To install simge on Debian based distro run install.sh file with super-user privilages. If you want install dependencies manually (e.g. in python venv) run compile.sh script which only compiles simge - then install remaining dependencies manually.
General command structure to run simge is simge [options]... <file_in> <file_out>.
Output file extension must be specified to let simge know which image compression alghoritm use for output file. Running simge without options decompress input file and then compress data with compression alghoritm specified by extension into output file.
Options order is relevant. For example running simge with options -r180 -p100,100,200,200 (rotate then crop) is not equivalent to running program with options -p100,100,200,200 -r180 (crop then rotate).
| Option | Argument | Argument values | Decription |
|---|---|---|---|
| --rotate (-r) | angle | {90, 180, 270} | Rotates image by angle. |
| --mirror (-m) | axis | {x, y} | Mirrors image to the axis. |
| --symmetric (-s) | side | {l, u, r, d} | Reflects image side symmetric. |
| --resize (-n) | dimension | 'new_width[,new_height]' | Resizes image. Resizes both sides with new_width if new_height is not given. |
| --crop (-p) | coordinates | 'start_x,start_y,final_x,final_y' | Crops image. |
| --binary (-b) | method | {n, r} | Converts image to binary. |
| --grayscale (-g) | - | - | Converts image to grayscale. |
| --sepiascale (-e) | - | - | Converts image to sepiascale. |
| --switch (-w) | channels | '---', where each '-' in {R, G, B, 0} | Switch or disable image's RGB channels. |
| --lightness (-l) | value | <-255, 255> | Sets image lightness. |
| --contrast (-c) | value | <0, 360> | Sets image contrast. |
Some of options argument's values has other equivalent values (e.g. {l, u, r, d} == {left, up, right, down}). Using that values is supported by simge. All of these values can be found in main.c file.
Input image:
| Command | Output |
|---|---|
simge -r180 -g ex/lenna.jpg ex/lenna_r180_g.jpg |
 |
simge -sr -wGBR ex/lenna.jpg ex/lenna_sr_wgbr.jpg |
 |
simge -c250 -n300 ex/lenna.jpg ex/lenna_c250_n300.jpg |
 |
simge -l-100 -p20,20,150,200 ex/lenna.jpg ex/lenna_l-100_p20,20,150,200.jpg |
 |
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