Method and device for detecting transitions in a video sequence, method and device for coding, computer program products and corresponding storage means
First Claim
1. A method for detecting transitions in a video sequence, the method comprising detecting an abrupt transition including the following steps, for each image It−
- 2k included in said video sequence and with a processing time rank t−
2k;
calculation of a first distance D(It−
k), between an image It−
k and a reference image for said image It−
k, which precedes said image It−
k in the video sequence;
calculation of a second distance D(It−
2k), between an image It−
2k and a reference image for said image It−
2k, which precedes said image It−
2k in the video sequence;
calculation of a third distance D(It−
3k), between an image It−
3k and a reference image for said image It−
3k, which precedes said image It−
3k in the video sequence;
calculation of a criterion C′
indicating whether said second distance D(It−
2k) is significantly greater than the largest of the first and third distances, D(It−
k) and D(It−
3k);
decision, according to said criterion C′
, on the belonging of the image It−
2k to an abrupt transition.
8 Assignments
0 Petitions
Accused Products
Abstract
Method and apparatus for detecting transitions in a video sequence, which include detecting an abrupt transition including, for each image It−2k included in said video sequence and with a processing time rank t=2k: calculating a first distance D(It−k), between an image It−k and a reference image for said image It−k, which precedes said image It−k in the video sequence; calculating a second distance D(It−2k), between an image It−2k and a reference image for said image It−2k, which precedes said image It−2k in the video sequence; calculating a third distance D(It−3k), between an image It−3k and a reference image for said image It−3k, which precedes said image It−3k in the video sequence; calculating a criterion C′ indicating whether said second distance D(It−2k) is significantly greater than the largest of the first and third distances, D(It−k) and D(It−3k); deciding, according to said criterion C′, on the belonging of the image It−2k to an abrupt transition.
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Citations
19 Claims
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1. A method for detecting transitions in a video sequence, the method comprising detecting an abrupt transition including the following steps, for each image It−
- 2k included in said video sequence and with a processing time rank t−
2k;
calculation of a first distance D(It−
k), between an image It−
k and a reference image for said image It−
k, which precedes said image It−
k in the video sequence;
calculation of a second distance D(It−
2k), between an image It−
2k and a reference image for said image It−
2k, which precedes said image It−
2k in the video sequence;
calculation of a third distance D(It−
3k), between an image It−
3k and a reference image for said image It−
3k, which precedes said image It−
3k in the video sequence;
calculation of a criterion C′
indicating whether said second distance D(It−
2k) is significantly greater than the largest of the first and third distances, D(It−
k) and D(It−
3k);
decision, according to said criterion C′
, on the belonging of the image It−
2k to an abrupt transition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- 2k included in said video sequence and with a processing time rank t−
-
14. A computer program product downloadable from a communication network and/or recorded on a computer-readable medium and/or executable by a processor, which includes program code instructions for detecting an abrupt transition including the following steps, for each image It−
- 2k included in a video sequence and with a processing time rank t−
2k, when said program is run on a computer;
calculating a first distance D(It−
k), between an image It−
k and a reference image for said image It−
k, which precedes said image It−
k in the video sequence;
calculating a second distance D(It−
2k), between an image It−
2k and a reference image for said image It−
2k, which precedes said image It−
2k in the video sequence;
calculating a third distance D(It−
3k), between an image It−
3k and a reference image for said image It−
3k, which precedes said image It−
3k in the video sequence;
calculating a criterion C′
indicating whether said second distance D(It−
2k) is significantly greater than the largest of the first and third distances, D(It−
k) and D(It−
3k);
deciding, according to said criterion C′
, on the belonging of the image It−
2k to an abrupt transition; and
outputting an indication whether the image It−
2k belongs to the abrupt transition. - View Dependent Claims (15)
- 2k included in a video sequence and with a processing time rank t−
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16. A storage device, which is entirely or partially removable, and computer readable, wherein the storage device comprises a set of stored instructions executable by a computer in order to detect an abrupt transition including the following steps, for each image It−
- 2k included in a video sequence and with a processing time rank t−
2k;
calculating a first distance D(It−
k), between an image It−
k and a reference image for said image It−
k, which precedes said image It−
k in the video sequence;
calculating a second distance D(It−
2k), between an image It−
2k and a reference image for said image It−
2k, which precedes said image It−
2k in the video sequence;
calculating a third distance D(It−
3k), between an image It−
3k and a reference image for said image It−
3k, which precedes said image It−
3k in the video sequence;
calculating a criterion C′
indicating whether said second distance D(It−
2k) is significantly greater than the largest of the first and third distances, D(It−
k) and D(It−
3k);
deciding, according to said criterion C′
, on the belonging of the image It−
2k to an abrupt transition; and
outputting an indication whether the image It−
2k belongs to the abrupt transition. - View Dependent Claims (17)
- 2k included in a video sequence and with a processing time rank t−
-
18. A device for detecting transitions in a video sequence, the device comprising:
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means for calculating a first distance D(It−
k), between an image It−
k and a reference image for said image It−
k, which precedes said image It−
k in the video sequence;
means for calculating a second distance D(It−
2k), between an image It−
2k and a reference image for said image It−
2k, which precedes said image It−
2k in the video sequence;
means for calculating a third distance D(It−
3k), between an image It−
3k and a reference image for said image It−
3k, which precedes said image It−
3k in the video sequence;
means for calculating a criterion C′
indicating whether said second distance D(It−
2k) is significantly greater than the largest of the first and third distances, D(Ilk) and D(It−
3k); and
means for deciding, according to said criterion C′
, on the belonging of the image It−
2k to an abrupt transition. - View Dependent Claims (19)
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Specification