IMAGE PROCESSING APPARATUS, PROGRAM, METHOD AND IMAGE CAPTURING SYSTEM

摘要

PROBLEM TO BE SOLVED: To extend a dynamic range by performing gradation conversion processing and to effectively reduce noise of an image signal subjected to the gradation conversion processing.

SOLUTION: This image processing apparatus includes: a first gradation-conversion-characteristics calculating unit that divides inputted image signals into a plurality of areas and calculates first gradation conversion characteristics for each of the divided areas; a gradation conversion unit that performs gradation conversion on each of the areas of the image signals by using the first gradation conversion characteristics; a filter processing and reduction processing unit 201 that generates a plurality of band signals having mutually different frequency bands by multi-resolution conversion processing from the image signals subjected to the gradation conversion; a second gradation-conversion-characteristics calculating unit 19 that respectively calculates second gradation conversion characteristics associated with the individual band signals from the first gradation conversion characteristics; an NR processing unit 204 that performs processing for noise reduction on the individual band signals by using the second gradation conversion characteristics; and an adding unit 206 that combines the respective band signals subjected to the processing for noise reduction.

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