Method and apparatus for visually optimized rate control
AssigneeEastman Kodak Company
InventorsChris W. Honsinger, Majid Rabbani, Paul W. Jones
Life of this patent
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Abstract
A method selecting a quality parameter for use in compressing a digital image, the method comprises the steps of creating a plurality of quantizer parameter sets, each having a corresponding quality parameter; compressing the digital image with the plurality of quantizer parameter sets for providing a corresponding plurality of compressed file sizes; creating a rate-distortion curve from the plurality of quantizer parameter sets and the corresponding compressed file sizes; providing a maximum and minimum quality parameters; providing a target compressed file size; and selecting a quality parameter based on the rate distortion curve, the maximum and minimum quality parameters and the target compressed file size.
Claims8
A method selecting a quality parameter for use in compressing a digital image, the method comprising the steps of:
- (a) creating a plurality of quantizer parameter sets, each having a corresponding quality parameter;
- (b) compressing the digital image with the plurality of quantizer parameter sets for providing a corresponding plurality of compressed file sizes;
- (c) creating a rate-distortion curve from the plurality of quantizer parameter sets and the corresponding compressed file sizes;
- (d) providing a maximum and minimum quality parameters;
- (e) providing a target compressed file size;
- and,
- (f) selecting a quality parameter based on the rate distortion curve, the maximum and minimum quality parameters and the target compressed file size.
Dependencies are inferred from the claim text.