Patent ID: 11972594
Assignee: SHARP KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 0:
1. An image processing apparatus comprising:
a color distribution degree deriver that derives a color distribution degree that is a distribution degree of pixel values of respective sets of pixel data included in input image data;
a photograph area ratio deriver that derives a photograph area ratio that is a ratio of photograph area pixel data forming a photograph area associated with the pixel data;
a color uniformity area ratio deriver that derives a color uniformity area ratio that is a ratio of color uniformity area pixel data forming a color uniformity area where the pixel values are defined as being uniform to the pixel data; and
a determiner that determines whether to perform either an index color process by performing a compression process using a lossless compression method after performing a color reduction process on the input image data or a full-color process by performing a compression process using a lossy compression method without performing the color reduction process on the input image data based on the color distribution degree, the photograph area ratio, and the color uniformity area ratio, wherein
the determiner further determines to perform the index color process only when the color distribution degree is less than a first reference value, the photograph area ratio is less than a second reference value, and the color uniformity area ratio is more than a third reference value.