公开(公告)号：US11651495B2

公开(公告)日：2023-05-16

申请号：US17123228

申请日：2020-12-16

Applicant: REALTEK SEMICONDUCTOR CORP.

Inventor： Yang-Ting Chou ,  Tsung-Hsuan Li ,  Shih-Tse Chen

IPC: G06T5/00 ,  G06T5/20 ,  G06T7/00 ,  G06T7/11 ,  G06T7/90

CPC classification number: G06T7/11 ,  G06T5/008 ,  G06T5/20 ,  G06T7/0002 ,  G06T7/90 ,  G06T2207/10024 ,  G06T2207/30168

Abstract: A method and a system for image correction are provided. The system includes an image processor that performs the method for image correction when receiving an input image. In the method, an overexposed area within the image is determined. The channel values of pixels in the overexposed area are applied with corresponding weights. An automatic white balance process is performed on the channel values of pixels in the overexposed area according to an expectation of low saturation in the overexposed area. Besides a first channel value of each of the pixels, a second channel value and a third channel value of the pixel can be estimated according to the channel values of periphery pixels. A correction value overexposed of the first channel value of the current pixel can be calculated according to the corresponding weights of the pixels in the overexposed area.

公开(公告)号：US11645734B2

公开(公告)日：2023-05-09

申请号：US15931914

申请日：2020-05-14

Applicant: REALTEK SEMICONDUCTOR CORP.

Inventor： Yang-Ting Chou ,  Tsung-Hsuan Li ,  Shih-Tse Chen

IPC: G06T3/40 ,  G06T5/20 ,  H04N23/84

CPC classification number: G06T3/4015 ,  G06T5/20 ,  H04N23/843 ,  G06T2207/20004 ,  G06T2207/20032 ,  H04N2209/046

Abstract: A circuitry for image demosaicing and contrast enhancement and an image-processing method thereof are provided. The circuitry includes a storage device that is used to temporarily store an image and is jointly used by circuits that perform color restoration and brightness reconstruction. The circuitry includes a color restoration circuit for performing image interpolation and a global mapping circuit that performs mapping to obtain brightness of an image according to restored red, green and blue information of every pixel. Further, an edge texture feature decision circuit is provided to obtain each pixel's directionality for color restoration. A brightness estimation circuit utilizes green information of the pixels as the brightness for an area. After that, a color image with the color restoration and brightness reconstruction is outputted.