Background Removal refers to the removal of the background or the backdrop of the picture wherein the object/objects are placed. While removing the background, the entire background or merely parts of the background we desire can be removed.
Prior to the popularity of digital cameras and photo editing software the method of removing the background from an image was an intensely arduous process.
In years past background removal was performed in a darkroom with the required ambient conditions which typically included proper room temperature. The film would be placed in working chemical solvent and had to be monitored constantly. Overexposure of the film to the solution would typically result in an increase in background blur and decrease in resolution.
Now, background removal is done with any digital photo editing software like GNU Image Manipulation Program, or GIMP. GIMP is a special type of graphics editing application that is able to support some types of object-oriented (or vector) graphics.
While it is not strictly imperative that your choice of digital photo editing software be able to support all types of object-oriented graphics, the main advantage in using GIMP is that it allows for easy vector to raster conversion.
Other popularly used raster graphics editors and digital photo editors will also work just fine. Most digital photo editors have a number of plug-ins which can modify the background in different ways. Plug-ins are computer programs with highly specific purposes. Most sophisticated photo editing programs use special purpose plug-ins and will perform background editing and removal based on different criteria.
Objects without backgrounds can be used in several different ways. They can be placed in a new backdrop and in different situational contexts. For eg.: a couch in furniture showroom could have the furniture showroom replaced with an office. The object can be moved around any which way and it's alignment w.r.t the new background can also be changed.
The great thing about an object without a background is that it maintains all its properties like shape and size, but becomes more flexible to individual usage.
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