Texture replacement in video sequences and images
First Claim
1. A method comprising:
- identifying a region of interest belonging to a portion of a frame in a video sequence comprising a set of frames;
performing regional segmentation of the region of interest and removing a texture of the region of interest from each respective frame of the set of frames within the video sequence;
representing a color frame in the region of interest by a set of two-dimensional planes in a YUV color space;
converting original frames from the YUV color space into an RGB color space to yield RGB color frames;
synthesizing replacement texture based on an evaluation of color characteristics of the RGB color frames utilizing an angular map and a modulus map of color vectors of the RGB color frames;
modifying the replacement texture by applying a set of constraints to the replacement texture, wherein the set of constraints is selected based on a dominant orientation of the replacement texture, and wherein the set of constraints comprises at least an overall color and a color saturation, to yield a new texture;
inserting the new texture into each respective frame of the set of frames in the video sequence; and
encoding the video sequence containing the new texture to yield an encoded video sequence.
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Abstract
Systems and methods for reducing bit rates by replacing original texture in a video sequence with synthesized texture. Reducing the bit rate of the video sequence begins by identifying and removing selected texture from frames in a video sequence. The removed texture is analyzed to generate texture parameters. New texture is synthesized using the texture parameters in combination with a set of constraints. Then, the newly synthesized texture is mapped back into the frames of the video sequence from which the original texture was removed. The resulting frames are then encoded. The bit rate of the video sequence with the synthesized texture is less than the bit rate of the video sequence with the original texture. Also, the ability of a decoder to decode the new video sequence is not compromised because no assumptions are made about the texture synthesis capabilities of the decoder.
57 Citations
17 Claims
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1. A method comprising:
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identifying a region of interest belonging to a portion of a frame in a video sequence comprising a set of frames; performing regional segmentation of the region of interest and removing a texture of the region of interest from each respective frame of the set of frames within the video sequence; representing a color frame in the region of interest by a set of two-dimensional planes in a YUV color space; converting original frames from the YUV color space into an RGB color space to yield RGB color frames; synthesizing replacement texture based on an evaluation of color characteristics of the RGB color frames utilizing an angular map and a modulus map of color vectors of the RGB color frames; modifying the replacement texture by applying a set of constraints to the replacement texture, wherein the set of constraints is selected based on a dominant orientation of the replacement texture, and wherein the set of constraints comprises at least an overall color and a color saturation, to yield a new texture; inserting the new texture into each respective frame of the set of frames in the video sequence; and encoding the video sequence containing the new texture to yield an encoded video sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system comprising:
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a processor; and a computer-readable storage medium having instructions stored which, when executed by the processor, result in the processor performing operations comprising; identifying a region of interest belonging to a portion of a frame in a video sequence comprising a set of frames; performing regional segmentation of the region of interest and removing a texture of the region of interest from each respective frame of the set of frames within the video sequence; representing a color frame in the region of interest by a set of two-dimensional planes in a YUV color space; converting original frames from the YUV color space into an RGB color space to yield RGB color frames; synthesizing replacement texture based on an evaluation of color characteristics of the RGB color frames utilizing an angular map and a modulus map of color vectors of the RGB color frames; modifying the replacement texture by applying a set of constraints to the replacement texture, wherein the set of constraints is selected based on a dominant orientation of the replacement texture, and wherein the set of constraints comprises at least an overall color and a color saturation, to yield a new texture; inserting the new texture into each respective frame of the set of frames in the video sequence; and encoding the video sequence containing the new texture to yield an encoded video sequence. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A computer-readable storage device having instructions stored which, when executed by a computing device, result in the computing device performing operations comprising:
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identifying a region of interest belonging to a portion of a frame in a video sequence comprising a set of frames; performing regional segmentation of the region of interest and removing a texture of the region of interest from each respective frame of the set of frames within the video sequence; representing a color frame in the region of interest by a set of two-dimensional planes in a YUV color space; converting original frames from the YUV color space into an RGB color space to yield RGB color frames; synthesizing replacement texture based on an evaluation of color characteristics of the RGB color frames utilizing an angular map and a modulus map of color vectors of the RGB color frames; modifying the replacement texture by applying a set of constraints to the replacement texture, wherein the set of constraints is selected based on a dominant orientation of the replacement texture, and wherein the set of constraints comprises at least an overall color and a color saturation, to yield a new texture; inserting the new texture into each respective frame of the set of frames in the video sequence; and encoding the video sequence containing the new texture to yield an encoded video sequence. - View Dependent Claims (17)
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Specification