US 2018/0007332 A1 · HIGHLIGHT RECOVERY IN IMAGES

Abstract

Embodiments of the present disclosure relate to highlight recovery of a high-resolution image using a single low-resolution image captured at a lower exposure. An example apparatus includes a hue target circuit that receives an input image at a high-resolution including at least one pixel with a clipped color channel. For example, the input image is a Blue sky image with a pixel having clipped Blue channel. The hue target circuit also receives a set of candidate hue maps having a pixel resolution lower than the high-resolution of the input image. The hue target circuit generates a target hue value for the at least one pixel using the pixel information of the set of candidate hue maps. The apparatus also includes a hue recovery circuit that generates a recovered version of the input image by adjusting hue information of the clipped color channel based on the generated target hue.

Claims20

Dependent claims

An apparatus, comprising:

a hue target circuit to:
receive a first image at a first resolution comprising a pixel with hue information having a clipped color channel;
receive a plurality of candidate hue maps at a second resolution lower than the first resolution;
and
generate a target hue for the pixel based on the plurality of candidate hue maps;
and
a hue recovery circuit to generate a recovered version of the first image by adjusting the hue information of the pixel based on the generated target hue.

4 more elements

Dependencies are inferred from the claim text.

Highlight recovery in images

Life of this patent

Highlight recovery in images

Life of this patent

Abstract

Claims20