Method and Arrangement for creating a high-resolution still picture
DC CAFCFirst Claim
1. A method of creating a high-resolution still picture, comprising the steps of:
- receiving a sequence of lower-resolution pictures;
estimating motion in said sequence of lower-resolution pictures with sub-pixel accuracy; and
creating the high-resolution still picture from said sequence of lower-resolution pictures and said estimated motion;
wherein the method comprises the steps of;
subjecting the sequence of pictures to motion-compensated predictive encoding, thereby generating motion vectors representing motion between successive pictures of said sequence;
decoding said encoded pictures; and
creating the high-resolution picture from said decoded pictures and the motion vectors generated in said encoding step.
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Litigations
1 Petition
Accused Products
Abstract
A method and arrangement is disclosed for creating a high-resolution still picture. A sequence of lower-resolution pictures is subjected to motion-compensated predictive encoding, preferably by an MPEG encoder producing an IPPP. sequence of encoded pictures. The relatively small differences between successive pictures, which are due to motion of the image sensor or motion in the scene, become manifest in motion vectors with sub-pixel accuracy. The high-resolution picture is then created from the decoded pictures and the motion vectors generated by the encoder. The invention is particularly applicable in electronic still picture cameras with a storage medium. The MPEG encoder takes care of data compression, and the decoder also allows playback of the original moving video sequence.
56 Citations
10 Claims
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1. A method of creating a high-resolution still picture, comprising the steps of:
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receiving a sequence of lower-resolution pictures;
estimating motion in said sequence of lower-resolution pictures with sub-pixel accuracy; and
creating the high-resolution still picture from said sequence of lower-resolution pictures and said estimated motion;
wherein the method comprises the steps of;
subjecting the sequence of pictures to motion-compensated predictive encoding, thereby generating motion vectors representing motion between successive pictures of said sequence;
decoding said encoded pictures; and
creating the high-resolution picture from said decoded pictures and the motion vectors generated in said encoding step. - View Dependent Claims (2, 3, 4)
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5. An arrangement for creating a high-resolution still picture, comprising:
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means (1) for receiving a sequence of lower-resolution pictures;
means for estimating motion in said sequence of lower-resolution pictures with sub-pixel accuracy; and
means (5) for creating the high-resolution still picture from said sequence of lower-resolution pictures and said motion vectors;
wherein the arrangement further comprises;
an encoder (2) for subjecting the sequence of pictures to motion-compensated predictive encoding, including a motion estimator (24) for generating motion vectors representing motion between successive pictures of said sequence;
a decoder (4) for decoding said encoded pictures;
the creating means (5) being arranged to create the high-resolution picture from said decoded pictures and the motion vectors generated by the encoder (2). - View Dependent Claims (6, 7, 8, 9)
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10. An arrangement for creating a high-resolution still picture, comprising:
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means for receiving a sequence of lower-resolution pictures in the form of motion-compensated predictively encoded pictures and motion vectors representing motion between successive pictures of said sequence;
a decoder (4) for decoding said encoded pictures; and
means (5) for creating the high-resolution picture from said decoded pictures and the received motion vectors;
wherein the creating means include means (53,54) for recursively adding, in the high-resolution domain, a current decoded picture to a previously created picture, said previously created picture being subjected to motion compensation (55) in accordance with the motion vector which is associated with the current decoded picture.
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Specification