METHOD AND DEVICE FOR GENERATING DEPTH IMAGE USING REFERENCE IMAGE, METHOD FOR ENCODING/DECODING DEPTH IMAGE, ENCODER OR DECODER FOR THE SAME, AND RECORDING MEDIUM RECORDING IMAGE GENERATED USING THE METHOD
First Claim
1. A depth image generating method comprising:
- a step (a) of obtaining a depth image at a viewpoint and setting the obtained depth image to a reference image;
a step (b) of applying a 3D warphing method to the reference image and predicting and generating a depth image at a specific viewpoint; and
a step (c) of removing a hole that exists in the predicted and generated depth image.
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Abstract
The present invention relates to a method and device for generating a depth image, a method for encoding/decoding the depth image, an encoder/decoder for the same, and a recording medium recording an image generated by the method, which are related to a depth image encoding method that can effectively reduce a bit generation rate using a reference image obtained by at least one camera and improve encoding efficiency. A depth image generating method according to an embodiment of the invention includes a step (a) of obtaining a depth image at a viewpoint and setting the obtained depth image to a reference image; a step (b) of applying a 3D warphing method to the reference image and predicting and generating a depth image at a specific viewpoint; and a step (c) of removing a hole that exists in the predicted and generated depth image.
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Citations
21 Claims
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1. A depth image generating method comprising:
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a step (a) of obtaining a depth image at a viewpoint and setting the obtained depth image to a reference image; a step (b) of applying a 3D warphing method to the reference image and predicting and generating a depth image at a specific viewpoint; and a step (c) of removing a hole that exists in the predicted and generated depth image. - View Dependent Claims (2, 3, 4, 5, 6, 21)
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7. A depth image generating device comprising:
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a depth image storage unit that obtains a depth image at a viewpoint and stores the obtained depth image as a reference image; a depth image prediction unit that applies a 3D warphing method to the reference image and predicts and generates a depth image at a specific viewpoint; and a hole removing unit that removes a hole that exists in the depth image predicted and generated by the depth image prediction unit. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An encoding method using a depth image at a specific viewpoint, the depth image being generated using the following steps:
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a step (a) of obtaining a depth image at a viewpoint and setting the obtained depth image to a reference image; a step (b) of applying a 3D warphing method to the reference image and predicting and generating the depth image at a specific viewpoint; and a step (c) of removing a hole that exists in the predicted and generated depth image. - View Dependent Claims (14, 15, 19, 20)
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16. An encoder comprising:
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an image prediction unit that performs inter-prediction and intra-prediction; an image T/Q unit that transforms and quantizes a prediction sample that is obtained by the image prediction unit; an entropy coding unit that encodes image data quantized by the image T/Q unit; and a depth image generating unit that generates a depth image at a specific viewpoint by the image prediction unit, wherein the depth image generating unit includes; a depth image prediction unit that applies a 3D warphing method to a reference image using a depth image at a viewpoint as the reference image and predicts and generates a depth image at a specific viewpoint; and a hole removing unit that removes a hole that exists in the depth image predicted and generated by the depth image prediction unit. - View Dependent Claims (17, 18)
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Specification