Image editing is used to alter the images whether they are digital or traditional analogue photographs. Some times traditional analog image editing is also known as photo retouching. Graphic software programs are the primary tools used to manipulate, transform and enhance image and these tools include vector graphic editors, raster graphic editors and 3D modelers. Many image editing programs are used to create computer art from scratch.
Computer image editing software offers features which are are used to correct the color hue, brightness imbalances and sharpness adjustments, zoom features and automatic cropping of the image. With the image editing software the size of the image can be reduced and the storage space can be saved as the image file formats use data compression.
Image editing software offers many features like selecting the parts of the images to be manipulated, maximum flexibility for the users due to the layers, alteration of image size, cropping the image, and so on. By the use of image editing software image histograms can be created, and they also provide algorithms to add or remove noise in an image, removal of unwanted elements in the image, changing of image colors and altering of an image by rotating in any direction and to any degree. Some image editors also allow the distortion of the image by which the quality of the image can be improved. Photographers with the use of image editing software can select and merge the images, in addition to slicing of images. Image editors have a list of special effects that can be added to the images, they also provide the features to manipulate the gamma value of the images. Pixels per inch variable stored in the image file controls the print size and quality of digital images.