METHOD AND DEVICE FOR IMAGE PROCESSING BY IMAGE DIVISION

• US 20130101216A1
• Filed: 10/18/2012
• Published: 04/25/2013
• Est. Priority Date: 10/19/2011
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Eum, Nak Woong, CHO, Seunghyun
• Granted Patent: US 8,958,642 B2
• Time in Patent Office: Days
• US Class Current: 382/173
• CPC Class Codes: H04N 19/00 Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
• CPC Class Codes: H04N 19/132 Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
• CPC Class Codes: H04N 19/156 Availability of hardware or computational resources, e.g. encoding based on power-saving criteria
• CPC Class Codes: H04N 19/174 the region being a slice, e.g. a line of blocks or a group of blocks
• CPC Class Codes: H04N 19/182 the unit being a pixel
• CPC Class Codes: H04N 19/436 using parallelised computational arrangements
• CPC Class Codes: H04N 19/88 involving rearrangement of data among different coding units, e.g. shuffling, interleaving, scrambling or permutation of pixel data or permutation of transform coefficient data among different blocks

Abstract

Disclosed are a method and a device for processing an image by using image division capable of simultaneously minimizing deterioration of an image quality due to an error in a transmission line and further improving compression efficiency in performing compression and restoration of an image signal by using multiple processors. The method of processing an image by using image division according to an exemplary embodiment of the present disclosure includes dividing an image frame into multiple subblocks having a predetermined pixel size; constituting multiple macroblocks by sampling respective pixels positioned at an identical position within a predetermined number of subblocks; and constituting multiple slices by dividing the multiple macroblocks based on the positions of the sampled pixels within the subblock.

Claims

1. A method of processing an image by using image division, comprising:

dividing an image frame into multiple subblocks having a predetermined pixel size;

constituting multiple macroblocks by sampling respective pixels positioned at an identical position within a predetermined number of subblocks; and

constituting multiple slices by dividing the multiple macroblocks based on the positions of the sampled pixels within the subblock.

2. The method of claim 1, further comprising:

encoding the multiple slices in parallel by using multiple image encoding processors; and

generating a bit stream by combining the encoded data.

3. The method of claim 2, wherein in the encoding, information on positions of the pixels constituting each of the slices within the subblock is recorded in a header of the slice.

4. The method of claim 1, wherein the macroblock has a 16×

16 pixel size.

5. A method of processing an image by using image division, comprising:

dividing an image frame into multiple subblocks having a predetermined pixel size;

calculating an average value of pixels of each of the multiple subblocks; and

constituting one average value slice with pixels having the average value.

6. The method of claim 5, further comprising:

generating a bit stream by encoding the average value slice.

7. The method of claim 5, further comprising:

constituting multiple macroblocks by sampling respective pixels positioned at an identical position within a predetermined number of subblocks; and

constituting multiple slices by dividing the multiple macroblocks according to the positions of the sampled pixels within the subblock, the multiple slices being constituted of difference value by calculating a difference value between pixels included in each of the multiple slices and pixels included in the average value slice.

8. The method of claim 7, further comprising:

encoding the average value slice and the multiple slices constituted of the difference values in parallel by using multiple image encoding processors; and

generating a bit stream by combining the encoded data.

9. The method of claim 8, wherein in the encoding, information on positions of the pixels constituting each of the slices within the subblock is recorded in a header of the slice.

10. A device for processing an image by using image division, comprising:

an image divider configured to divide an image frame into multiple subblocks having a predetermined pixel size, constitute multiple macroblocks by sampling respective pixels positioned at an identical position within a predetermined number of subblocks, and constitute multiple slices by dividing the multiple macroblocks according to positions of the sampled pixels within the subblock;

a multi processor comprising multiple image encoding processors configured to encode the multiple slices in parallel; and

a data combiner configured to generate a bit stream by combining the encoded data.

11. The device of claim 10, wherein the image divider calculates an average value of the pixels of each of the multiple subblocks and further constitutes one average value slice with pixels having the average value.

12. The device of claim 11, wherein the image divider calculates a difference value between the pixels included in each of the multiple slices and pixels included in the average value slice to constitute the multiple slices with the difference values.

13. The device of claim 12, wherein the multiple image encoding processors encode the average value slice and the multiple slices constituted of the difference values in parallel.

14. The device of claim 10, wherein the multiple image encoding processors record information on positions of the pixels constituting each of the slices within the subblock in a header of the slice in the encoding.