Image identification method, electronic device, and computer program product

Patent metadata

Field	Value
Publication number	US-9466123-B2
Application number	US-201614994210-A
Country	US
Kind code	B2
Filing date	Jan 13, 2016
Priority date	Feb 4, 2013
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

An image identification method, an electronic device with image identification function and a computer program product executing the image identification method with a software program are provided. The image identification method comprises steps of: proceeding texture feature extraction on a color source image to obtain a plurality of texture parameters; proceeding color feature extraction on a color source image to obtain a plurality of color momentums; and weighting the plurality of texture parameters and the plurality of color momentums to obtain an image identification parameter corresponding to the color source image.

First claim

What is claimed is:

1. An electronic device with image identification function, comprising:
a storage unit configured to store a color source image in memory;
texture determination circuitry, electrically connected to the storage unit, configured to perform texture feature extraction on the color source image to obtain a plurality of texture parameters;
color determination circuitry, electrically connected to the storage unit, configured to perform texture feature extraction on the color source image to obtain a plurality of color momentums; and
identification circuitry, electrically connected to the texture determination circuitry and the color determination circuitry, configured to weight the plurality of texture parameters and the plurality of color momentums to obtain an image identification parameter corresponding to the color source image and to output the image identification parameter to the storage unit, wherein weights corresponding to the plurality of texture parameters and weights corresponding to the plurality of color momentums are adjusted according to size of the color source image.

2. The electronic device according to claim 1 , wherein the texture determination circuitry comprises:
a gray-level transformation circuitry, electrically connected to the storage unit, for converting the color source image to a gray-level source image;
a discrete cosine conversion circuitry, electrically connected to the gray-level transformation circuitry, for performing discrete cosine transformation on the gray-level source image to generate at least one block transformation matrix; and
a texture feature capturing circuitry, electrically connected to the discrete cosine conversion circuitry, for obtaining the plurality of texture parameters according to the at least one block transformation matrix.

3. The electronic device according to claim 2 , wherein the texture determination circuitry further comprises:
a block division circuitry, electrically connected to the gray-level transformation circuitry and the discrete cosine conversion circuitry, for dividing the gray-level source image into at least one gray-level block.

4. The electronic device according to claim 3 , wherein the discrete cosine conversion circuitry performs discrete cosine transformation on each of the at least one gray-level block for respectively generating the at least one block transformation matrix.

5. The electronic device according to claim 2 , wherein the texture determination circuitry further comprises:
an accumulation circuitry, electrically connected to the texture feature capturing circuitry and the identification circuitry, for accumulating the at least one block transformation matrix to obtain an image transformation matrix, wherein the image transformation matrix comprises a plurality of accumulated converting values.

6. The electronic device according to claim 5 , wherein the at least one block transformation matrix comprises a plurality of converting values, the accumulation circuitry sums up a converting value at a first position of a first block transformation matrix and a converting value at the first position of a second block transformation matrix, and the image transformation matrix is obtained by repeating the above process on converting values at the first position of each block transformation matrix and repeating the above process on converting values at each position of each block transformation matrix.

7. The electronic device according to claim 5 , wherein the image transformation matrix is divided into a smooth texture area, a vertical texture area, a horizontal texture area, a slashed texture area, and a high-frequency area, and the identification circuitry obtains the plurality of texture parameters according to the smooth texture area, the vertical texture area, the horizontal texture area, and the slashed texture area.

8. The electronic device according to claim 7 , wherein the identification circuitry weights the plurality of texture parameters according to a smooth texture weight corresponding to the smooth texture parameters, a vertical texture weight corresponding to the vertical texture parameter, a horizontal texture weight corresponding to the horizontal texture parameter, and a slashed texture weight corresponding to the slashed texture parameter.

9. The electronic device according to claim 1 , wherein the color determination circuitry comprises:
a chromaticity conversion circuitry, electrically connected to the storage unit, for performing chromaticity conversion on the plurality of color pixels respectively to obtain a plurality of chromaticity pixels;
a mapping circuitry, electrically connected to the chromaticity conversion circuitry, for mapping the plurality of chromaticity pixels onto a chromaticity plane;
a pixel accumulated circuitry, electrically connected to the mapping circuitry, for calculating number of the plurality of chromaticity pixels corresponding to positions on the chromaticity plane; and
a color characteristic capturing circuitry, electrically connected to the pixel accumulated circuitry and the identification circuitry, for obtaining the plurality of color momentums according to the plurality of combinations of chromaticity densities and the number of the plurality of chromaticity pixels corresponding to the positions on the chromaticity plane.

10. The electronic device according to claim 9 , wherein the chromaticity conversion circuitry converts the plurality of color pixels represented by a prime color representation method into the chromaticity pixels represented by a chromaticity representation method according to the chromaticity transformation matrix.

Assignees

• Wistron Corp

Inventors

• Liao Po-Hsuan

Classifications

• G06V10/56 Primary

  relating to colour · CPC title

• G06V10/50

  by performing operations within image blocks; by using histograms, e.g. histogram of oriented gradients [HoG]; by summing image-intensity values; Projection analysis · CPC title

• G06T7/401

  Physics · mapped topic

• G06T2207/20021

  Dividing image into blocks, subimages or windows · CPC title

• G06K9/4661

  Physics · mapped topic