Image processing apparatus and image processing method

摘要

An image processing apparatus includes a gain calculation unit that calculates a gain for each of a plurality of pixels of an image signal, respectively, and an addition unit that adds the gain for each pixel to the corresponding pixel of the plurality of pixels of the image signal. The gain calculation unit includes a first order differential operation unit that calculates a first value from first order differential of the image signal for each of the plurality of pixels and second order differential operation unit that calculates a second value from a second order differential of the image signal for each of the plurality of pixels, and calculates the gains for each pixel based on the first and second values for each pixel.

主权项

1. An image processing apparatus comprising:
a gain calculation unit that calculates a gain for each of a plurality of pixels of an image signal; and an addition unit that adds the gain for each pixel to the corresponding pixel of the plurality of pixels of the image signal, wherein the gain calculation unit includes a first order differential operation unit that calculates a first value for each of the plurality of pixels from one of an average value or a maximum value of absolute values of first order differential values of a target pixel and at least one adjacent pixel of the image signal and a second order differential operation unit that calculates a second value for each of the plurality of pixels from one of an average value or a maximum value of absolute values of second order differential values of the target pixel and the at least one adjacent pixel of the image signal, wherein the gain for each pixel is calculated based on the first and second values for each pixel.