Patent ID: 8768054
Filing Date: 2014-07-01
Classification: G06T,H04N

Abstract:
1. An image processing device comprising: a component separation unit which separates an original image signal into a plurality of components including a first component and a second component obtained after the first component is separated from the original image signal, wherein the first component is a skeleton component of the original image signal and contains a gently varying component and an edge component, and wherein the second component is a residual component obtained after the first component is separated from the original image signal and contains texture components and noise; a tone conversion signal level acquisition unit which obtains a signal level of one of the first component and the original image signal; a tone conversion coefficient setting unit which sets a tone conversion coefficient to be applied during tone conversion based on the signal level of the one of the first component and the original image signal obtained by the tone conversion signal level acquisition unit, and not based on a signal level of the second component; a tone conversion unit which performs tone conversion processing on the first component using the tone conversion coefficient; a noise reduction signal level acquisition unit which obtains the signal level of the first component; a parameter setting unit which obtains a noise distribution corresponding to the signal level of the first component, and sets a noise reduction processing parameter corresponding to the obtained noise distribution; and a noise reduction processing unit which reduces a noise of the second component using the noise reduction processing parameter and the tone conversion coefficient.