psychology & perception;

In methods of lossy compression, human psychology and perception is an important factor. This is because in lossy compressions, very little of the information from a file is still there. Without the deception of how the human eye perceives the difference of information, the file would be very noticeably different from the original. Without our minds to 'fill in the blanks', we would recognise the errors and inconsistencies in a lossy compression.