The contrast adjustment is good method to change the image properties to get a better visual appearance. When contrast is intensified, some principles of  human eye perception are considered - the darkness/brightness ratio and saturation increase. As more as contrast is increased, more data are overridden, so the quality of image can't be recovered later.

Contrast

Picture data:

Reduced on

14%

Resampling process

Anti-alias

Compression

30 steps

 

Original image data:

Type

fine JPEG

Resolution

2560*1800

File size

1506 KB

Image size/72dpi

903 x 677 mm

Focus

200 mm

Aperture

9,5

Shutter time

1/30 sec

ISO

100

WB

sun

Color

0

Intensity

0

Contrast

-3

Sharpness

Normal