公开(公告)号：US20240380994A1

公开(公告)日：2024-11-14

申请号：US18195208

申请日：2023-05-09

Applicant: CISTA SYSTEM CORP.

Inventor： Yang-Ting CHOU ,  Zhaojian LI

IPC: H04N25/57 ,  G06T5/00 ,  G06T5/10 ,  G06T5/50 ,  H04N25/11 ,  H04N25/62

Abstract: This application describes method and apparatus for HDR+ using M×N-cell sensors. An example apparatus includes a plurality of pixel groups, each pixel group having M×N pixels configured with color filters of a same color such that the M×N pixels in each pixel group capture a same color. M and N are integers greater than one, and each pixel is represented by a first number of bits. The example apparatus further include one or more processors configured to: capture, through the plurality of pixel groups, a plurality of frames of a scene using a short-exposure setting; merge the plurality of frames into an HDR image; and perform tone mapping on the HDR image to reduce a dynamic range of the super-pixels of the HDR image into a low dynamic range (LDR) image, wherein each pixel in the LDR image is represented with the first number of bits

公开(公告)号：US20240193736A1

公开(公告)日：2024-06-13

申请号：US18077166

申请日：2022-12-07

Applicant: CISTA SYSTEM CORP.

Inventor： Yang-Ting CHOU ,  Zhaojian LI

IPC: G06T5/50 ,  G06T5/00 ,  G06T7/20

CPC classification number: G06T5/50 ,  G06T5/002 ,  G06T5/009 ,  G06T7/20 ,  G06T2207/10024 ,  G06T2207/20021 ,  G06T2207/20076 ,  G06T2207/20208 ,  G06T2207/20221

Abstract: This application describes methods and systems for High Dynamic Range (HDR) image fusion on Low Dynamic Range (LDR) images that avoid ghosting effect. An example method may start with detecting a plurality of motion pixels on the plurality of LDR images. For each of the motion pixels, a plurality of pixel values may be obtained. Each pixel value represents a brightness of the pixel in the corresponding LDR image. The method may then construct a fusion tensor comprising a plurality of dimensions respectively corresponding to the plurality of exposure settings. Each motion pixel may be mapped to the fusion tensor based on the plurality of the pixel values of the motion pixel to obtain a fusion weight. The fusion weights of the motion pixels may provide guidance to the HDR fusion on the LDR images.

公开(公告)号：US20240087128A1

公开(公告)日：2024-03-14

申请号：US17940891

申请日：2022-09-08

Applicant: CISTA SYSTEM CORP.

Inventor： Yang-Ting CHOU ,  Zhaojian LI

IPC: G06T7/11 ,  G06T3/40 ,  G06T5/20 ,  G06T7/90

CPC classification number: G06T7/11 ,  G06T3/4015 ,  G06T5/20 ,  G06T7/90

Abstract: This application describes systems and methods for detecting depth in deep trench isolation with semiconductor devices using test key transistors. An method comprises: capturing, by an image sensor, an image; generating a plurality of chrominance channels by converting the image into luminance-chrominance space; performing homogeneous region segmentation on the plurality of chrominance channels to generate one or more regions of interest in the plurality of chrominance channels; and projecting the regions of interest onto eigen-illuminant images to determine gray color pixels on the image, wherein the eigen-illuminant images are generated via performing a machine learning algorithm on a training set of images captured by the image sensor.