Patent ID: 11941789
Assignee: GOPRO, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 8:
9. An image processor, comprising:
a first unit configured to capture an image;
a second unit configured to divide the image into blocks and perform image processing against each of the blocks, wherein, for a given block of the blocks, the second unit performs the image processing by:
separating low frequency information of the given block and high frequency information of the given block;
performing multiple tone control against the low frequency information of the given block based on a gain curve computed for the given block and based on results of a bilinear interpolation performed between the given block and one or more blocks adjacent to the given block within the image;
performing local tone mapping against the high frequency information of the given block using an edge preservation filter; and
producing a processed block based on results of the multiple tone control and results of the local tone mapping,

wherein a processed image is produced based on the processed block and based on other processed blocks produced by the second unit,
wherein a resolution of the multiple tone control is increased based on a size of the edge preservation filter, and
wherein increasing the resolution of the multiple tone control compensates for an effect on medium frequency information of the image by the local tone mapping.