Montage Lz Technologies (chengdu) Co., Ltd.

Chia Chen Chang

Zhimin Qiu

Chengqiang Liu

Ke Wu

Mengchi He

Binxuan Sun

This application relates to a method and a device for changing a dynamic range of luminance of an image. The method comprises: extracting luminance statistical information of at least a portion of pixels of a frame to be processed, wherein the frame to be processed has an original dynamic range of luminance; clustering the at least a portion of pixels into pixel groups divided by multiple luminance flag values based on the luminance statistical information of at least a portion of pixels, wherein each of the pixel groups includes a predetermined number of pixels, and pixels of each two adjacent pixel groups are divided by one of the multiple luminance flag values; and generating a conversion mapping relationship based on the multiple luminance flag values such that the frame to be processed is converted into a target frame with a target dynamic range of luminance based on the conversion mapping relationship, wherein the conversion mapping relationship associates original luminance values in the original dynamic range of luminance with target luminance values in the target dynamic range of luminance.

Method and device for changing a dynamic range of luminance of an image

The present application discloses a method of interpolating an image including a pixel array formed of multiple pixels. The method includes: determining a position of an interpolation point relative to the pixel array; determining weights of an edge direction of the pixel array at the position of the interpolation point in a plurality of preset edge directions based on pixel values of a plurality of pixels adjacent to the interpolation point; selecting, for each preset edge direction, one or more corresponding pixel sub-arrays covering the interpolation point from the pixel array to calculate an interpolation pixel value of the interpolation point; calculating a weighted interpolation pixel value of the interpolation point based on the weights of the edge direction of the pixel array at the position of the interpolation point in the preset edge directions and the interpolation pixel value of the interpolation point corresponding to each preset edge direction.

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Chengdu, China

Chia Chen Chang