US 2014/0212033 A1 · IMAGE COMPRESSION MEHTOD, IMAGE COMPRESSION DEVICE AND MOBILE TERMINAL

Abstract

The present invention provides an image compression method, comprising: determining non-edge portions of an image to be compressed by performing an image edge detection on the image to be compressed; dividing each of non-edge portions into a plurality of connected domains of pixels according to color similarity of the pixels in the non-edge portion, wherein each of the connected domains of pixels is composed of a pixel selected during the division into the connected domains of pixels and the pixels similar in color to and continuously adjacent to the selected pixel; setting the color of each of the connected domains of pixels to be the color of the selected pixel; merging the colors of a plurality of divided connected domains of pixels according to similarity of the colors of the connected domains of pixels; and compressing the image to be compressed by using the merged colors. According to the method, the number of colors used for image compression can be determined according to the characteristics of the image, thus the file size of the compressed image can be effectively reduced with the display effect thereof kept substantially unchanged.

Claims12

Dependent claims

An image compression method, comprising steps of:

determining non-edge portions of an image to be compressed by performing an image edge detection on the image to be compressed;
dividing each of the determined non-edge portions into a plurality of connected domains of pixels according to color similarity of the pixels in the non-edge portion, wherein each of the connected domains of pixels is composed of a pixel selected during the division into the connected domains of pixels and the pixels similar in color to and continuously adjacent to the selected pixel;
setting the color of each of the connected domains of pixels to be the color of the pixel selected during the division into the connected domains of pixels;
merging the colors of a plurality of divided connected domains of pixels according to similarity of the colors of the connected domains of pixels, wherein the connected domains of pixels having similar colors will be merged into one connected domain of pixels having a same color;
and
compressing the image to be compressed by using the merged colors.

3 more elements

An image compression device, comprising:

a non-edge portion determining unit for determining non-edge portions of an image to be compressed by performing an image edge detection on the image to be compressed;
a connected-domain-of-pixels dividing unit for dividing each of the determined non-edge portions into a plurality of connected domains of pixels according to color similarity of the pixels in the non-edge portion, wherein each of the connected domains of pixels is composed of a pixel selected during the division into the connected domains of pixels and the pixels similar in color to and continuously adjacent to the selected pixel;
a color setting unit for setting the color of each of the connected domains of pixels to be the color of the pixel selected during the division into the connected domains of pixels;
a color merging unit for merging the colors of a plurality of divided connected domains of pixels according to similarity of the colors of the connected domains of pixels, wherein the connected domains of pixels having similar colors will be merged into one connected domain of pixels having a same color;
and
a compressing unit for compressing the image to be compressed by using the merged colors.

3 more elements

Dependencies are inferred from the claim text.

Image compression mehtod, image compression device and mobile terminal

Life of this patent

Image compression mehtod, image compression device and mobile terminal

Life of this patent

Abstract

Claims12