Image processing method, image processing apparatus, program of image processing method and recording medium recording program of image processing method

• US 20070147691A1
• Filed: 12/07/2006
• Published: 06/28/2007
• Est. Priority Date: 12/07/2005
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Ozaki, Koji
• Granted Patent: US 7,848,582 B2
• Time in Patent Office: Days
• US Class Current: 382/233
• CPC Class Codes: H04N 19/40 using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
• CPC Class Codes: H04N 19/48 using compressed domain processing techniques other than decoding, e.g. modification of transform coefficients, variable length coding [VLC] data or run-length data motion estimation in a transform domain H04N19/547; processing of decoded motion vectors H04N19/513
• CPC Class Codes: H04N 19/60 using transform coding

Abstract

An image processing method for decoding input encoded image data, which has undergone encoding processing by a predetermined format, image processing the decoded image data, and encoding the image-processed data to create output encoded data includes repeating the process of decoding, image processing and encoding processing and outputting the image data in image processing units subject to the image processing; and sorting the encoded data obtained from the repeated processing step and creating the output encoded data in an order defined by the format of the output encoded data for performing encoding processing on one picture plane. In this case, the repeated processing step includes decoding the input encoded data in the image processing units and outputting image data, image processing the decoded image data in the image processing units, and encoding processing the image-processed data in encoding processing units.

Claims

1. An image processing method for decoding input encoded image data, which has undergone encoding processing by a predetermined format, image processing the decoded image data, and encoding the image-processed data to create output encoded data, the method comprising:

repeating the process of decoding, image processing and encoding processing and outputting the image data in image processing units subject to the image processing; and

sorting the encoded data obtained from the repeated processing step and creating the output encoded data in an order defined by the format of the output encoded data for performing encoding processing on one picture plane,

wherein the repeated processing step includes;

decoding the input encoded data in the image processing units and outputting image data;

image processing the decoded image data in the image processing units; and

encoding processing the image-processed data in encoding processing units.

2. The image processing method according to claim 1, wherein the decoding and encoding steps are performed by alternately using an encoding/decoding section that decodes the input encoded data and encodes the image-processed data.

3. The image processing method according to claim 1, wherein the repeated processing step includes recording and holding predetermined data detected by the encoding processing step so as to be available in a later encoding processing step, the image processing method further comprising:

obtaining the predetermined data, which, depending on the recording and holding step, may not be held so as to be available in the later encoding processing step;

the predetermined data being data to be transmitted with a difference value between a current encoding processing unit and an immediately preceding encoding processing unit;

the encoding processing step including creating the encoded data based on the predetermined data recorded in the recording and holding step and a previous processing in the repeated processing step; and

the previous processing in the repeated processing step including;

decoding the input encoded data relating to the previous data and outputting decoded previous image data;

image-processing the decoded previous image data; and

encoding processing the image-processed previous image data in encoding processing units and detecting the previous data obtained by the previous processing in the repeated processing step.

4. The image processing method according to claim 3, wherein the predetermined data is DC value data of the encoding processing unit.

5. The image processing method according to claim 1, wherein

the output encoded data is data on an image resulting from rotation of the image based on the input encoded image data;

and

the repeated processing step rotates the image based on the input encoded image data by rotating the image in the image processing units, encoding processing units or intermediate processing units between the image processing units and the encoding processing units and then sorting the encoded data in the sorting step.

6. The image processing method according to claim 1, wherein the output encoded data is data on an image resulting from partial extraction of the image based on the input encoded image data.

7. The image processing method according to claim 1, wherein:

the encoding processing step includes creating the encoded data by variable-length encoding processing and detecting the amount of generated codes for each of the encoding processing units; and

the sorting step includes sorting the encoded data in the encoding processing units based on the amounts of generated codes detected by the encoding processing step.

8. An image processing apparatus for decoding input encoded image data, which has undergone encoding processing by a predetermined format, image processing the decoded image data, and encoding the image-processed data to create output encoded data, the apparatus comprising:

a repeated processing section operable to repeat the process of decoding, image processing and encoding processing and outputting the image data in image processing units subject to the image processing; and

a sorting section operable to sort the encoded data obtained from the repeated processing section and to create the output encoded data in an order defined by the format of the output encoded data for performing encoding processing on one picture plane,

wherein the repeated processing section includes;

a decoding section operable to decode the input encoded data in the image processing units and to output image data;

an image processing section operable to image process the decoded image data in the image processing units; and

an encoding section operable to encoding process the image-processed data in encoding processing units.

9. A program for causing computing processing means to execute an image processing method for decoding input encoded image data, which has undergone encoding processing by a predetermined format, image processing the decoded image data, and encoding the image-processed data to create output encoded data, the method comprising:

repeating the process of decoding, image processing and encoding processing and outputting the image data in image processing units subject to the image processing; and

sorting the encoded data obtained from the repeated processing step and creating the output encoded data in an order defined by the format of the output encoded data for performing encoding processing on one picture plane,

wherein the repeated processing step includes;

decoding the input encoded data in the image processing units and outputting image data;

image processing the decoded image data in the image processing units; and

encoding processing the image-processed data in encoding processing units.

10. A recording medium recorded with a program for causing computing processing means to execute an image processing method for decoding input encoded image data, which has undergone encoding processing by a predetermined format, image processing the decoded image data, and encoding the image-processed data to create output encoded data, the method comprising:

repeating the process of decoding, image processing and encoding processing and outputting the image data in image processing units subject to the image processing; and

sorting the encoded data obtained from the repeated processing step and creating the output encoded data in an order defined by the format of the output encoded data for performing encoding processing on one picture plane,

wherein the repeated processing step includes;

decoding the input encoded data in the image processing units and outputting image data;

image-processing the decoded image data in the image processing units; and

encoding processing the image-processed data in encoding processing units.