go-filter

go-filter

What is it?

The project allows clients to send files to a server which process them (by applying filters) and then send them back to the clients.

Filter List

• nullify
• copy or identity
• invert
• grayscale filters :
  • grayScaleAverage
  • grayScaleLuminosity
  • grayScaleDesaturation
  • (to learn more about grayScaleFilters click here
• noiseReduction (a.k.a blur), parameters :
  • radius=int (default=1) : larger is blurrier (e.g.: noiseReduction radius)
• edges return an image with different color for edges and gap :
  • radius=int (default=1) : smaller gives sharper edges (e.g.: radius=2)
  • threshold=float64 (default=1000) : threshold for the detection of edges (e.g.: threshold=500 )
  • dist=string (default=euclidean) : function used to compute color distance in RGBA color space available functions :
    • dist=euclidean
    • dist=norm1
  • edge_color=(R,G,B,A) [warning : no spaces] (default=BLACK=[0,0,0,255])
  • gap color=(R,G,B,A) [warning : no spaces] (default=TRANSPARENT_WHITE=[255,255,255,0]) when the color is not well defined, it will keep the originals colors

to use a filter with arguments, simply give filter arg1=value arg2=value .... Every argument has a default value that will be used if custom value is not provided by the user e.g.: edges radius=5 threshold=1000 dist=euclidean edge_color=(100,100,100,75) gap_color=(10,10,10,100) will run an edge detection filter with a radius of 5, a threshold of 1000, the norm euclidean, and a chosen edge color & gap color

Building project

git clone https://github.com/mxyns/go-filter cd go-filter go build

Launching

If you want to launch the server mode you have to use the -s (or -s=true) flag, otherwise the client mode is launched by default.

Server Mode

It should be noted :

Common flags :

• -a (string, default = 127.0.0.1) : the address of the server
• -P (string, default = tcp) : the protocol you want to use
• -p (int, default = 8887) : the port of the server
• -t (string, default = 10s) : the time after client connection crash
• -l (string, default = "panic") : the level of debug, logrus has seven log levels: Trace, Debug, Info, Warn, Error, Fatal, and Panic
• -f (boolean, default = true) : the custom formatter for the message in the terminal
• -d (boolean, default = true) : clear go-tcp files target directory and go-filter's outDir(used by server) on close
• -o (string, default = "panic") : change the temporary output directory. be sure it exists. won't be created automatically

Server specific flags :

• -r (int, default = 1) : number of image processing routines
• -scvert (int, default = 5) : vertical slice count per image
• -schor (int, default = 5) : horizontal slice count per image

Client Mode

You can use all of the server's common flags, as well as :

• -i (string, default = "") : the path of the image you want to use
• -fl (string, default = "copy") [requires -i] : the list of filters you want to apply on your image Using -i will put the client in "direct mode". It will immediately send a request to the server using the values provided and close after reception of the result. Omitting -i will put the client in "interactive mode", sequentially asking for the input file path (e.g.: ./path/to/file.png), the filter list you want to apply (e.g.: filter1 filter2 ...)

Dependencies

• go-tcp
  • which requires logrus