Image processing methods and image processing apparatuses

Patent metadata

Field	Value
Publication number	US-10123024-B2
Application number	US-201515304514-A
Country	US
Kind code	B2
Filing date	Mar 12, 2015
Priority date	Apr 18, 2014
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

Image processing methods and image processing apparatuses are provided. The image processing method comprises: determining at least one region of interest in an image; determining a parameter of interest of pixels in the image at least according to distribution of the at least one region of interest in the image; determining target positions of the pixels according to the parameter of interest of the pixels and a reduction ratio; and obtaining, according to the target positions of the pixels, a reduced image corresponding to the image. A proportion occupied by pixels of each region in a reduced image after compression is determined according to a degree of interest of a user in each region in an image, to cause a region appreciated by the user to be presented with high quality during restoration, and facilitate image processing after compression.

First claim

What is claimed is:

1. A method, comprising:
determining, by a system comprising a processor, at least one region of interest in an image;
determining parameters of interest for pixels within the image at least according to a distribution of the at least one region of interest in the image;
determining target positions for the pixels according to the parameters of interest for the pixels and a reduction ratio; and
generating, according to the target positions of the pixels, a reduced image corresponding to the image.

2. The method of claim 1 , wherein the determining the parameters of interest for the pixels within the image at least according to the distribution of the at least one region of interest in the image comprises:
determining the parameters of interest for the pixels according to the distribution of the at least one region of interest in the image and distribution information of the pixels in the image.

3. The method of claim 2 , wherein the distribution information of the pixels in the image comprises:
first position information of the pixels relative to the at least one region of interest.

4. The method of claim 2 , wherein the distribution information of the pixels in the image comprises:
second position information of the pixels relative to the boundary of the image.

5. The method of claim 1 , wherein the determining the target positions for the pixels according to the parameters of interest for the pixels and the reduction ratio comprises:
obtaining a first change trend parameter of the parameter of interest of the pixels according to the parameter of interest of the pixels.

6. The method of claim 5 , wherein the determining the target positions for the pixels according to the parameters of interest for the pixels and the reduction ratio comprises:
determining a first movement direction and a first movement amplitude of the pixels according to the first change trend parameter.

7. The method of claim 6 , wherein the determining the target positions for the pixels according to the parameters of interest for the pixels and the reduction ratio comprises:
determining a second movement direction and a second movement amplitude of the pixels according to the reduction ratio.

8. The method of claim 1 , further comprising:
determining the reduction ratio.

9. The method of claim 8 , wherein the determining the reduction ratio comprises:
determining the reduction ratio according to the distribution of the at least one region of interest in the image.

10. The method of claim 1 , wherein the generating the reduced image corresponding to the image comprises:
merging, by performing down sampling processing, at least two pixels that have the same target position in the image.

11. The method of claim 10 , wherein the merging the at least two pixels that have the same target position in the image comprises:
merging the at least two pixels according to the parameter of interest of the at least two pixels.

12. The method of claim 11 , wherein the merging the at least two pixels according to the parameter of interest of the at least two pixels comprises:
corresponding to the parameter of interest of a pixel in the at least two pixels being determined to be larger than the parameter of interest of another pixel in the at least two pixels, using the pixel having the larger parameter of interest as a pixel after merging.

13. The method of claim 1 , further comprising:
generating the parameter of interest of pixels in the reduced image.

14. The method of claim 13 , further comprising:
storing or outputting the parameter of interest of the pixels in the reduced image.

15. The method of claim 13 , further comprising:
generating a second change trend parameter of the parameter of interest of the pixels in the reduced image according to the parameter of interest of the pixels in the reduced image.

16. The method of claim 15 , further comprising:
storing or outputting the second change trend parameter.

17. The method of claim 1 , further comprising:
storing or outputting the reduced image.

18. An apparatus, comprising:
a processor, coupled to a memory, that executes or facilitates execution of executable modules, comprising:
a region of interest determining module configured to determine at least one region of interest in an image;
a parameter determining module configured to determine parameters of interest for pixels within the image at least according to distribution of the at least one region of interest in the image;
a target position determining module configured to determine target positions for the pixels according to the parameters of interest for the pixels and a reduction ratio; and
a reduced image generating module configured to obtain, according to the target positions of the pixels, a reduced image corresponding to the image.

19. The apparatus of claim 18 , wherein the parameter determining module is further configured to:
determine the parameters of interest for the pixels according to the distribution of the at least one region of interest in the image and distribution information of the pixels in the image.

20. The apparatus of claim 18 , wherein the target position determining module comprises:
a trend parameter generating unit configured to obtain a first change trend parameter of the parameter of interest of the pixels according to the parameter of interest of the pixels.

21. The apparatus of claim 20 , wherein the target position determining module comprises:
a first determining unit configured to determine a first movement direction and a first movement amplitude of the pixels according to the first change trend parameter.

22. The apparatus of claim 21 , wherein the target position determining module further comprises:
a second determining unit configured to determine a second movement direction and a second movement amplitude of the pixels according to the reduction ratio.

23. The apparatus of claim 18 , wherein the executable modules further comprise:
a ratio determining module configured to determine the reduction ratio.

24. The apparatus of claim 23 , wherein the ratio determining module comprises:
a first ratio determining unit configured to determine the reduction ratio according to the distribution of the at least one region of interest in the image.

25. The apparatus of claim 18 , wherein the reduced image obtaining module comprises:
a down sampling unit configured to merge, by performing down sampling processing, at least two pixels that have the same target position in the image.

26. The apparatus of claim 25 , wherein the down sampling unit comprises:
a first subunit configured to merge the at least two pixels according to the parameter of interest of the at least two pixels.

27. The apparatus of claim 26 , wherein the first subunit is further configured to:
in response to the parameter of interest of a pixel in the at least two pixels being determined to be larger than the parameter of interest of other pixels in the at least two pixels, using the pixel as the pixel after merging.

28. The apparatus of claim 18 , wherein the executable modules further comprise:
a parameter obtaining module configured to generate parameters of interest for pixels within the reduced image.

29. The apparatus of claim 28 , wherein the executable modules further com

Assignees

• Beijing Zhigu Ruituo Tech Co Ltd

Inventors

• Du Lin
• Ding Dayong

Classifications

• H04N19/132

  Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking · CPC title

• H04N19/17 Primary

  the unit being an image region, e.g. an object · CPC title

• H04N19/162

  User input · CPC title

• H04N19/167

  Position within a video image, e.g. region of interest [ROI] · CPC title

• H04N19/59

  involving spatial sub-sampling or interpolation, e.g. alteration of picture size or resolution · CPC title