What is Image Compression?

All file for digital pictures store relevant information relating to brightness, contrast, position and color of the level of pixels that are supporting image creation. What compression system actually does is reordering as well as rationalizing the technique in which the information storage takes place. The end result is nothing but the file that is being optimized and lowered in size. Large amount of space can be saved by making proper identification of textures, brightness and color aligned within the images. Storage of the patterns at one time helps in its further usage where you can use the reference and perform rest of the tasks in an image. The process of recognition of pattern and file optimization is recognized as compression.

Process of Compression and Decompression are also referred as CODEC. It contains below mentioned 3 stages:

1. Algorithm is used for compressing the original image for the purpose of optimizing the file.

2. The version of tile that comes out is the one to be stored on your website or hard drive, wherever you require.

3. Compressed file that is the output is decompression available for editing or viewing.

If the decompressed output is exactly what the original file is even after decompression then the process is referred as ‘Lossless’. And if few of the information is lost during the way then is can called as ‘Lossy’. Lossless systems generally result in reducing the file up to 60% of the real size whereas less that 1% is the amount for reduction in lossy compression.

Lossless and Lossy Image Compression

Photoshop is one such software that supports colors and formats of images in the best possible manner. Generally due to the colors and size, the files of images are comparatively heavier. Simply by looking with naked eye, the structure might not be reflected whereas after comparisons, you can easily see the difference especially while being used during word processing. Any text document with around 100 pages length will be less than 1% size of any file containing digital photograph of say 8 X 10inches. This much larger size of file doesn’t work anywhere in the industry. Although, this is the current scenario but the need was left quite afterward when the industry people understood the problem and came up with the solution to assist photographers in alleviating their need, who kept on buying big hard drives.
Anywhere within the industry, images with heavy size cannot be used especially on the websites and even for printing. It gets noticeable while comparing them with the digital files.

Comparisons in pictures enable the use to squeeze the larger sized image files to smaller. Quality sometimes reduces by this whereas in one system, loss of quality in picture can be attained – that is by ‘lossless compression’. The other one, ‘lossy compress’ enables saving greater space on the prices of lowering down few image details. Both situations are helpful for improving quality and performance and reducing errors.