Image motion vector detecting device and swing correcting device

• US 5,237,405 A
• Filed: 05/15/1991
• Issued: 08/17/1993
• Est. Priority Date: 05/21/1990
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Akahori, Hiroshi, Morimura, Atsushi, Egusa, Yo
• Primary Examiner(s): Peng, John K.
• Application Number:
  US07/700,519
• Time in Patent Office: 825 Days
• Field of Search: 358/105, 358/136, 358/135
• US Class Current: 348/208.1
• CPC Class Codes: G06T 2207/10016 Video; Image sequence
• CPC Class Codes: G06T 7/215 Motion-based segmentation
• CPC Class Codes: G06T 7/223 using block-matching
• CPC Class Codes: H04N 19/51 Motion estimation or motion compensation
• CPC Class Codes: H04N 19/527 Global motion vector estimation
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/6811 based on the image signal
• CPC Class Codes: H04N 23/682 Vibration or motion blur correction
• CPC Class Codes: H04N 5/145 Movement estimation for video coding H04N19/51

Abstract

An image motion vector detecting device has a part for determining correlation values in specific deviation in each detecting region of disposed plural detecting regions in a screen, a part for determining a time variation value of the correlation values, a part for determining a motion vector in each detecting region from the correlation values, a part for judging a reliability of the motion vector in each detecting region by using the correlation values and the time variation value, and a part for determining a motion vector of an entire screen by using the motion vector of each region on the basis of the judged reliability.

Claims

1. An image motion detecting device, comprising:

means for determining a motion vector in each detecting region of disposed plural detecting regions in a screen,

judging means for determining a judgment result having a meaning from true to false, from each one of two or more pieces of reliability judgment information which is obtained by using a correlation value in said each detecting region,

judgment value converting means for converting the judgment result having a meanining from true to false into a binary judgment value of true or false, and

means for determining a motion vector of said screen by using the motion vector of each region on the basis of the binary judgment value of each detecting region.

2. An image motion detecting device according to claim 1, wherein the means for determining the motion vector in each detecting region includes:

means for determining a correlation value in a specific deviation in each of the detecting regions in the screen; and

means for determining a time variation value of the correlation values;

wherein the means for determining the motion vector in each detecting region uses the correlation values from the detecting regions; and

wherein the judging means includes means for judging a reliability of the motion vector in each detecting region by using the correlation values and the time variation value.

3. An image motion detecting device according to claim 1, wherein the means for determining the motion vector in each detecting region includes means for determining a correlation value of motion vectors among the plural detecting regions;

wherein the judging means includes means for judging a reliability of the motion vector in each detecting region by using the correlation values; and

means for changing a judgment condition of the means for judging the reliability based on the correlation values.

4. An image motion detecting device according to claim 3, wherein said means for changing a judgment condition changes the judgment condition to be less severe when the correlation of the motion vectors among the plural detecting regions is high.

5. An image motion detecting device according to claim 1, wherein the means for determining the motion vector in each detecting region includes means for determining a correlation value in a specific deviation in each of the detecting regions in the screen;

and

wherein the means for determining the motion vector in each detecting region uses the correlation values; and

wherein the judging means includes means for judging a reliability of the motion vector in each detecting region by using a value of the motion vector in the detecting region, or the correlation value, or the combination of the motion vector value and the correlation value; and

wherein the motion detecting device further includes;

still state judging means for judging a still state of the motion vector for each detecting region by using the motion vector;

means for leading out a final judgement result from the still state judging means and the means for judging the reliability; and

wherein the means for determining the motion vector of the screen uses the final judgment result obtained by the means for leading out the final judgment result.

6. An image motion detecting device according to claim 1, wherein the means for determining the motion vector in each detecting region includes means for determining a correlation value in a specific deviation in each of the detecting regions in the screen;

wherein the means for determining the motion vector in each detecting region uses the correlation values from the detecting regions;

wherein the judging means includes means for judging a reliability of the motion vector in each detecting region by using a value of the motion vector in the detecting region, or the correlation value, or the combination of the motion vector value and the correlation value,

wherein the motion detecting device further includes;

minimum judging means for judging which motion vector has a relatively small value among the motion vectors of the detecting regions;

means for leading out a final judgement result from the minimum judging means and the means for judging the reliability; and

wherein the means for determining the motion vector of the screen uses the final judgment result obtained by the means for leading out the final judgment result.

7. An image motion detecting device according to claim 1, wherein the image motion detecting device further includes:

state judging means which judges a state of the motion vector of the detecting regions based on a value of the motion vector in the detecting region, or the correlation value, or a combination of the motion vector value in the detecting region and the correlation value, wherein the state judging means is a reliability judging means for judging a reliability of the motion vectors in the detecting regions based on the motion vector value or the correlation value or a combination of the motion vector value and the correlation value.

8. An image motion detecting device according to claim 1, wherein the means for determining the motion vector in each detecting region includes means for determining a correlation value in a specific deviation in each of the detecting regions in the screen;

wherein the judging means includes means for judging a reliability of the motion vector in each detecting region by using a motion vector value, or the correlation value, or a combination of the motion vector value and the correlation value; and

weighting processing means for determining the motion vector for the entire screen from weight coefficients set in each detecting region and the motion vector of the detecting regions which are judged to be reliable by the means for judging the reliability.

9. An image motion detecting device according to claim 1, wherein the means for determining the motion vector in each detector region includes means for determining a correlation value in a specific deviation in each of the detecting regions in the screen;

wherein the means for determining the motion vector in each of the detecting regions uses the correlation values; and

wherein the judging means includes means for judging a reliability of the motion vector in each detecting region by using a motion vector value in the detecting region, or the correlation value, or the combination of the motion vector value in the detecting region and the correlation value;

wherein the image motion vector detecting device further includes classifying means for classifying the motion vectors of the detecting regions which are judged to be reliable by the means for judging the reliability, wherein the motion vectors in each detecting region are classified into groups on the basis of their magnitude, their direction or their differential value;

camera shake group judging means for selecting one of the groups classified by the classifying means; and

wherein the means for determining the motion vector of the screen bases its determination on the motion vector of the group selected by the camera shake group judging means.

10. An image swing correcting device comprising:

image signal memory means or CCD for at least one field, and

an image motion vector detecting device as defined in claim 1.

wherein a reading position of the image signal memory means or CCD is controlled on the basis of the motion vector detected by the image motion vector detecting device.