IMAGE PROCESSING DEVICE AND METHOD
First Claim
Patent Images
1. An image processing device comprising:
- a decoding unit configured to decode a bit stream encoded in a unit having a hierarchical structure, and generate an image;
a filtering unit configured to perform a filtering operation on the image generated by the decoding unit; and
a filter adjustment unit configured to adjust a parameter of the filtering unit so as to perform a strong filtering operation on a boundary between a current region to be processed in the image generated by the decoding unit and a neighboring region adjacent to the current region, when a difference value between a quantization parameter of the current region and a quantization parameter of the neighboring region is larger than a threshold value.
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Abstract
The present technique relates to image processing devices and methods for enabling more appropriate removals of block distortions. When the difference between the quantization parameter QPc of a current region C and the quantization parameter QPN of a neighboring region N is determined to be larger than a predetermined threshold value, a deblocking filter adjusts the deblocking filtering operation so that stronger filtering is performed on a boundary between the current region and the neighboring region. This disclosure can be applied to image processing devices, for example.
26 Citations
18 Claims
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1. An image processing device comprising:
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a decoding unit configured to decode a bit stream encoded in a unit having a hierarchical structure, and generate an image; a filtering unit configured to perform a filtering operation on the image generated by the decoding unit; and a filter adjustment unit configured to adjust a parameter of the filtering unit so as to perform a strong filtering operation on a boundary between a current region to be processed in the image generated by the decoding unit and a neighboring region adjacent to the current region, when a difference value between a quantization parameter of the current region and a quantization parameter of the neighboring region is larger than a threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An image processing method comprising:
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generating an image by decoding a bit stream encoded in a unit having a hierarchical structure; when a difference value between a quantization parameter of a current region to be processed in the generated image and a quantization parameter of a neighboring region adjacent to the current region is larger than a threshold value, adjusting a filter parameter so as to perform a strong filtering operation on a boundary between the current region and the neighboring region; and performing the filtering operation on the generated image, the image generating, the parameter adjusting, and the filtering operation being performed by an image processing device.
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17. An image processing device comprising:
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a filtering unit configured to perform a filtering operation on a locally decoded image when an image is encoded; a filter adjustment unit configured to adjust a parameter of the filtering unit so as to perform a strong filtering operation on a boundary between a current region to be processed in the image and a neighboring region adjacent to the current region, when a difference value between a quantization parameter of the current region and a quantization parameter of the neighboring region is larger than a threshold value; and an encoding unit configured to perform encoding in a unit having a hierarchical structure by using a predicted image that is the image subjected to the filtering operation.
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18. An image processing method comprising:
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adjusting a filter parameter so as to perform a strong filtering operation on a boundary between a current region to be processed in an image and a neighboring region adjacent to the current region, when a difference value between a quantization parameter of the current region and a quantization parameter of the neighboring region is larger than a threshold value; performing the filtering operation on a locally decoded image when the image is encoded; and performing encoding in a unit having a hierarchical structure by using a predicted image that is the image subjected to the filtering operation, the parameter adjusting, the filtering operation, and the encoding being performed by an image processing device.
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Specification