Generating content data for a video file
First Claim
1. A method for generating content data for a video file, the video file comprising a video sequence and the content data for characterizing the video sequence, wherein the method comprises the steps:
- determining at least one face containing image by scanning at least a part of the video sequence for face containing images, each face containing image containing at least one representation of a face;
generating at least one picture containing the face based on the determined at least one face containing image;
cropping the at least one picture by removing an area of the picture which does not contain the representation of the face; and
assigning the at least one picture to the content data of the video file,wherein the step of generating at least one picture comprises;
determining for each face containing image a percentage area covered by the representation of the face, the percentage area indicating a relative amount of area of the image covered by the representation of the face as compared to an entire area of the image; and
generating the at least one picture based on the determined at least one face containing image and on the corresponding percentage area.
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Accused Products
Abstract
A method for generating content data for a video file (200) is provided. The video file (200) comprises a video sequence and the content data (201) for characterizing the video sequence. According to the method, at least one face containing image (204, 205, 207, 209, 212) is determined by scanning at least a part of the video sequence for face containing images. Each face containing image contains at least one representation of a face. Based on the determined face containing image a picture containing the face is generated and assigned to the content data (201) of the video file (200).
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Citations
16 Claims
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1. A method for generating content data for a video file, the video file comprising a video sequence and the content data for characterizing the video sequence, wherein the method comprises the steps:
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determining at least one face containing image by scanning at least a part of the video sequence for face containing images, each face containing image containing at least one representation of a face; generating at least one picture containing the face based on the determined at least one face containing image; cropping the at least one picture by removing an area of the picture which does not contain the representation of the face; and assigning the at least one picture to the content data of the video file, wherein the step of generating at least one picture comprises; determining for each face containing image a percentage area covered by the representation of the face, the percentage area indicating a relative amount of area of the image covered by the representation of the face as compared to an entire area of the image; and generating the at least one picture based on the determined at least one face containing image and on the corresponding percentage area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for generating content data for a video file, the video file comprising a video sequence and the content data for characterizing the video sequence, wherein the method comprises the steps:
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determining at least one face containing image by scanning at least a part of the video sequence for face containing images, each face containing image containing at least one representation of a face; generating at least one picture containing the face based on the determined at least one face containing image; cropping the at least one picture by removing an area of the picture which does not contain the representation of the face; assigning the at least one picture to the content data of the video file, wherein the step of generating at least one picture comprises; generating one picture based on a face containing image which represents the largest number of faces.
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10. A device comprising:
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a video access unit adapted to access a video file, the video file comprising a video sequence and content data for characterizing the video sequence; a face detection unit coupled to the video access unit, the face detection unit being configured to determine at least one face containing image by scanning at least a part of the video sequence for face containing images, each face containing image containing at least one representation of a face; and a processing unit coupled to the face detection unit, the processing unit being configured to generate at least one picture containing the face based on the determined at least one face containing image, to crop the at least one picture by removing an area of the picture which does not contain the representation of the face, and to assign the at least one picture to the content data of the video file, wherein the processing unit is configured to determine for each face containing image a percentage area covered by the representation of the face, the percentage area indicating a relative amount of area of the image covered by the representation of the face as compared to an entire area of the image, and generate the at least one picture based on the determined at least one face containing image and on the corresponding percentage area. - View Dependent Claims (11)
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12. A device comprising:
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a video access unit adapted to access a video file, the video file comprising a video sequence and content data for characterizing the video sequence; a face detection unit coupled to the video access unit, the face detection unit being configured to determine at least one face containing image by scanning at least a part of the video sequence for face containing images, each face containing image containing at least one representation of a face; and a processing unit coupled to the face detection unit, the processing unit being configured to generate at least one picture containing the face based on the determined at least one face containing image, to crop the at least one picture by removing an area of the picture which does not contain the representation of the face, and to assign the at least one picture to the content data of the video file, wherein the at least one picture is generated based on a face containing image which represents the largest number of faces.
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13. A method for generating content data for a video file, the video file comprising a video sequence and the content data for characterizing the video sequence, wherein the method comprises the steps:
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determining at least one face containing image by scanning at least a part of the video sequence for face containing images, each face containing image containing at least one representation of a face; generating at least one picture containing the face based on the determined at least one face containing image; assigning the at least one picture to the content data of the video file; and reducing a resolution of the at least one picture to a resolution which is lower than a resolution of the corresponding face containing image, wherein the step of generating at least one picture comprises; determining for each face containing image a percentage area covered by the representation of the face, the percentage area indicating a relative amount of area of the image covered by the representation of the face as compared to an entire area of the image; and generating the at least one picture based on the determined at least one face containing image and on the corresponding percentage area.
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14. A method for generating content data for a video file, the video file comprising a video sequence and the content data for characterizing the video sequence, wherein the method comprises the steps:
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determining at least one face containing image by scanning at least a part of the video sequence for face containing images, each face containing image containing at least one representation of a face; generating at least one picture containing the face based on the determined at least one face containing image; assigning the at least one picture to the content data of the video file; and reducing a resolution of the at least one picture to a resolution which is lower than a resolution of the corresponding face containing image, wherein the step of generating at least one picture comprises; generating one picture based on a face containing image which represents the largest number of faces.
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15. A device comprising:
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a video access unit adapted to access a video file, the video file comprising a video sequence and content data for characterizing the video sequence; a face detection unit coupled to the video access unit, the face detection unit being configured to determine at least one face containing image by scanning at least a part of the video sequence for face containing images, each face containing image containing at least one representation of a face; and a processing unit coupled to the face detection unit, the processing unit being configured to generate at least one picture containing the face based on the determined at least one face containing image, to assign the at least one picture to the content data of the video file, and to reduce a resolution of the at least one picture to a resolution which is lower than a resolution of the corresponding face containing image, wherein the processing unit is configured to determine for each face containing image a percentage area covered by the representation of the face, the percentage area indicating a relative amount of area of the image covered by the representation of the face as compared to an entire area of the image, and generate the at least one picture based on the determined at least one face containing image and on the corresponding percentage area.
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16. A device comprising:
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a video access unit adapted to access a video file, the video file comprising a video sequence and content data for characterizing the video sequence; a face detection unit coupled to the video access unit, the face detection unit being configured to determine at least one face containing image by scanning at least a part of the video sequence for face containing images, each face containing image containing at least one representation of a face; and a processing unit coupled to the face detection unit, the processing unit being configured to generate at least one picture containing the face based on the determined at least one face containing image, to assign the at least one picture to the content data of the video file, and to reduce a resolution of the at least one picture to a resolution which is lower than a resolution of the corresponding face containing image wherein the at least one picture is generated based on a face containing image which represents the largest number of faces.
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Specification