Gimp

Gimp is free and open-source raster graphics editor available for Windows, Linux, macOS, and more operating systems. Since it is open-source and free software, you can change its source code and distribute modified software. It provides sophisticated tools to all categories of people whether you are a graphic designer, video editor, photographer, or scientist. It can work with all image formats such as JPEG, PNG, SVG, PSD, BMP.

Features:

There are various tools in Gimp to perform image editing.

• Selections and paths:
  Selection tools in GIMP include a circular and rectangular selection tool, select by color tool, scissors select tool, fuzzy select tool and free select tool. GIMP has a quick mask mode where you can use a brush to paint a selected area.

• Image editing:
  There are various tools like pencil, airbrush, eraser that are used to edit images in GIMP. Clone tool is used to copy pixels using a brush. Blur and sharpen tool is used to blurs and sharpens using brush. Dodge tool is used to make target pixels lighter or darker using brush. Healing brush is used to copy pixels from an area and also corrects tone and color. It provides smart tools that use complex algorithms to do things which would be time-consuming and impossible without it.

• Layers, layer masks and channels:
  Image in GIMP consist of many layers which is stored in a stack. Each layer is made up of many channels. Each layer is made up of many channels. There are 3 or 4 channels, each having a red, green and blue channel in an RGB image.

  Hacking:

  GNOME Foundation hosts all code repositories of GIMP and uses git as its revision control system.

• gimp- It is the GIMP application itself.

• gimp-help- It is the GIMP user manual.

• gimp-web - It is repo for GIMP website.

  On IRC which is the GIMP channel and/or the relevant mailing lists, new contributors should firstly introduce themselves.

  Reference:

  wikipedia