Method and system for adaptive quantization layer reduction in image processing applications
AssigneeSamsung Electronics Co., Ltd.
InventorsZhi Zhou, Yeong-Taeg Kim
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Abstract
A method and a system for adaptively (dynamically) reducing quantization layer reduction for removing quantization artifacts in quantized video signals is provided. Adaptively reducing quantization layer reduction involves detecting if a selected pixel in a quantized image belongs to a ramp area in each of multiple pre-defined directions, dynamically selecting a quantization level for each of the pre-defined directions based on the corresponding detection results, and refining the pixel based on the selected quantization levels.
Claims47
A method of processing a quantized input image, comprising the steps of:
- detecting if a selected pixel in the quantized image belongs to a ramp area in each of multiple pre-defined directions;
- dynamically selecting a quantization level for each of the pre-defined directions based on the corresponding detection results;
- and
- refining the pixel based on the selected quantization levels.
An image processing system for processing a quantized input image, comprising:
- a detector that is configure to detect if a selected pixel in the quantized image belongs to a ramp area in each of multiple pre-defined directions;
- a quantization level calculator that is configured to dynamically calculate a quantization level for each of the pre-defined directions based on the corresponding detection results;
- and
- a refining module that is configured to refine the pixel based on the selected quantization levels.
Dependencies are inferred from the claim text.