Image data of each image is different, that the resolution of the camera in the mobile terms each rose and the value of a color in a photograph different in each picture. Make it uneven.
Each image data are different. The resolution of the camera mobile phones roll each different and the color in the picture is taken differently. Made uneven
The data each picture is different. The resolution of the camera in a cell phone each machine and different values of colors in each different image photography, uneven.