JP2008017209A5

JP2008017209A5 -

Info

Publication number: JP2008017209A5
Application number: JP2006186972A
Authority: JP
Filing date: 2006-07-06
Publication date: 2009-08-20
Anticipated expiration: 2026-07-06

Claims

A motion vector detection device that detects a motion vector using processing target image data and a plurality of reference image data,
First matching error between the first image data having a first block size in the processing target image data is minimized, the first block in the first reference image data among the plurality of reference image data First motion vector detecting means for determining second image data having a size and detecting a first motion vector based on the first image data and the second image data;
The first image data is divided into a plurality of third image data having a second block size smaller than the first block size, and the plurality of third image data is calculated based on the first matching error that is minimized. First extraction means for extracting a plurality of second matching errors corresponding to each of the image data;
First determination means for determining a third block size used for motion vector detection using the plurality of reference image data based on the plurality of second matching errors extracted by the first extraction means. A motion vector detection apparatus comprising:

If the third block size matches the first block size,
The first motion vector detection means further detects the first motion vector using reference image data other than the first reference image data using the first block size. The motion vector detection device according to claim 1.

The first determining means determines the third block size to be the first block size when a second matching error larger than a first threshold is present among the plurality of second matching errors. The motion vector detection device according to claim 1, wherein the block size is determined according to a predetermined condition.

When the third block size is smaller than the first block size and larger than the second block size,
Fifth image having a fourth third matching error between the image data is the smallest, the in the plurality of reference image data a third block size having the third block size in the processed image data 4. The apparatus according to claim 1, further comprising second motion vector detecting means for determining data and detecting a second motion vector based on the fourth image data and the fifth image data. The motion vector detection device according to any one of the above.

When the third block size is the second block size,
5 having a fourth third matching error between the image data is the smallest, the second block size in the first reference image data having the second block size in the first image data Second motion vector detection means for determining a second motion vector based on the fourth image data and the fifth image data;
The fourth image data is divided into a plurality of sixth image data having a fourth block size smaller than the second block size, and the plurality of sixth image data are calculated based on the third matching error that is minimized. Second extraction means for extracting a plurality of fourth matching errors corresponding to each of the image data;
Second determination means for determining a fifth block size used for motion vector detection using the plurality of reference image data based on the plurality of fourth matching errors extracted by the second extraction means. motion vector detection device according to any one of claims 1 to 3, further comprising and.

When the fifth block size matches the second block size,
The second motion vector detection means further detects the second motion vector using reference image data other than the first reference image data using the second block size. The motion vector detection device according to claim 5.

The second determining means determines the fifth block size to be the second block size when there is a fourth matching error larger than a second threshold among the plurality of fourth matching errors. The motion vector detection device according to claim 5, wherein the block size is determined according to a predetermined condition.

If the fifth block size does not match the second block size,
An eighth image having the fifth block size in the plurality of reference image data, in which a fifth matching error with the seventh image data having the fifth block size in the processing target image data is minimized. 8. The apparatus according to claim 5, further comprising third motion vector detecting means for determining data and detecting a third motion vector based on the seventh image data and the eighth image data. The motion vector detection device according to any one of the above.

The first block size is a block size of 16 pixels × 16 pixels,
The second block size is a block size of 8 pixels × 8 pixels,
The fourth block size, the motion vector detecting apparatus according to any one of claims 5 to 8, characterized in that a block size of 4 × 4 pixels.

A motion vector detection method for detecting a motion vector using processing target image data and a plurality of reference image data,
First matching error between the first image data having a first block size in the processing target image data is minimized, the first block in the first reference image data among the plurality of reference image data A first motion vector detection step of determining second image data having a size and detecting a first motion vector based on the first image data and the second image data;
The first image data is divided into a plurality of third image data having a second block size smaller than the first block size, and the plurality of third image data is calculated based on the first matching error that is minimized. A first extraction step of extracting a plurality of second matching errors corresponding to each of the image data;
A first determination step of determining a third block size used for motion vector detection using the plurality of reference image data based on the plurality of second matching errors extracted in the first extraction step. A motion vector detection method comprising:

A computer program for causing a computer to execute the motion vector detection method according to claim 10 .

A computer-readable storage medium storing the computer program according to claim 11 .