IMAGE PROCESSING CIRCUIT AND IMAGE PROCESSING METHOD
First Claim
1. An image processing circuit, comprising:
- a full search engine, which executes a full search to generate a sum of sum of absolute difference (SAD) distribution according to a reference image and a current image, wherein the SAD distribution comprises a plurality of sums of absolute differences; and
a frame rate conversion (FRC) engine, which generates an interpolated image according to the reference image, the current image and a plurality of the control parameters, wherein the FRC engine determines whether the number of sums of absolute differences larger than the smallest threshold is equal to 1 when partial of the sums of absolute differences is smaller than the smallest threshold, the current image comprises a good scene when the number of sums of absolute differences is equal to 1, the current image comprises a periodic scene when the number of sums of absolute differences is larger than 1, the FRC engine determines whether the sum of absolute differences is larger than an average pixel level (APL) when the sum of absolute differences is not smaller than the smallest threshold, the current image comprises a flash scene when the sum of absolute differences is larger than the APL, the current image comprises a bad scene when the sum of absolute differences is not larger than the APL, and the FRC engine adjusts the at least one of the control parameters according to the good scene, the periodic scene, the flash scene or the bad scene.
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Abstract
An image processing circuit and an image processing method are provided. The image processing circuit comprises a full search engine and a frame rate conversion (FRC) engine. The full search engine executes a full search to generate a sum of sum of absolute difference (SAD) distribution according to the reference image and the current image. The FRC engine analyzes a scene characteristic from the current image according to SAD distribution. The FRC engine adjusts at least one of the control parameters according to the scene characteristic. The FRC engine generates an interpolated image according to the reference image, the current image and the control parameters.
27 Citations
31 Claims
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1. An image processing circuit, comprising:
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a full search engine, which executes a full search to generate a sum of sum of absolute difference (SAD) distribution according to a reference image and a current image, wherein the SAD distribution comprises a plurality of sums of absolute differences; and a frame rate conversion (FRC) engine, which generates an interpolated image according to the reference image, the current image and a plurality of the control parameters, wherein the FRC engine determines whether the number of sums of absolute differences larger than the smallest threshold is equal to 1 when partial of the sums of absolute differences is smaller than the smallest threshold, the current image comprises a good scene when the number of sums of absolute differences is equal to 1, the current image comprises a periodic scene when the number of sums of absolute differences is larger than 1, the FRC engine determines whether the sum of absolute differences is larger than an average pixel level (APL) when the sum of absolute differences is not smaller than the smallest threshold, the current image comprises a flash scene when the sum of absolute differences is larger than the APL, the current image comprises a bad scene when the sum of absolute differences is not larger than the APL, and the FRC engine adjusts the at least one of the control parameters according to the good scene, the periodic scene, the flash scene or the bad scene. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An image processing circuit, comprising:
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a full search engine, which executes a full search to generate a sum of sum of absolute difference (SAD) distribution according to a reference image and a current image; and a frame rate conversion (FRC) engine, which generates an interpolated image according to the reference image, the current image and a plurality of the control parameters, and adjusts an update vector used in a three-dimensional recursive search (3DRS), a SAD coring or a quantity of candidate motion vectors according to the SAD distribution. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An image processing method, comprising:
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executing a full search to generate a sum of sum of absolute difference (SAD) distribution according to a reference image and a current image, wherein the SAD distribution comprises a plurality of sums of absolute differences; analyzing a scene characteristic from the current image according to the SAD distribution; adjusting at least one of the control parameters according to the scene characteristic; and generating an interpolated image according to the reference image, the current image and the control parameters. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification