Image processing apparatus for regional image enhancement and image processing method using the same

摘要

An image processing apparatus for adjusting the luminance of a target pixel of an image is provided. The target pixel includes original pixel data and corresponds to a mask value. The image processing apparatus includes a luminance detection unit, a luminance compensation unit and a mapping unit. The luminance detection unit generates an original luminance value according to the original pixel data. The luminance compensation unit adjusts the original luminance value according to a non-linear function to generate a compensated luminance value. The mapping unit generates adjusted pixel data according to the compensated luminance value. The non-linear function at least includes a first monomial function, which has a base part associated with an inverse value of the original luminance value and an exponent part associated with the mask value.

主权项

1. An image processing apparatus, for adjusting a luminance of a target pixel of an image, the target pixel comprising original pixel data and corresponding to a mask value, the image processing apparatus comprising:
a luminance detection unit, for generating an original luminance value according to the original pixel data; a luminance compensation unit, for adjusting the original luminance value according to a non-linear function to generate a compensated luminance value; and a mapping unit, for generating adjusted pixel data according to the compensated luminance value; wherein the non-linear function at least comprises a first monomial function, which has a base part associated with an inverse value of the original luminance value and an exponent part associated with the mask value, and the luminance detection unit, the luminance compensation unit and the mapping unit are implemented by hardware.