公开(公告)号：WO2020023675A1

公开(公告)日：2020-01-30

申请号：PCT/US2019/043309

申请日：2019-07-24

Applicant: MAGIC LEAP, INC.

Inventor： SCHUCK, Miller Harry, III ,  ZHANG, Lei ,  GROSSMANN, Etienne Gregoire ,  SHAH, Nukul Sanjay ,  ZOHAR, Ohad ,  ZITO, Robert ,  MORLEY, Nicholas Ihle ,  SCHAEFER, Jason ,  JIA, Zhiheng ,  BROWY, Eric C. ,  CAPPS, Marshall Charles ,  TANAKA, Kazunori ,  VESOM, Grace ,  MONOS, John

IPC: G01J3/46 ,  G02B27/01 ,  G09G3/00

Abstract: A method for characterizing a digital color camera includes, for each of three primary colors used in a field sequential color virtual image, determining a conversion model for each color using RGB values and the color-measurement values. For each primary color, the method includes illuminating a display device using an input light beam of a primary color having spectral properties representative of a light beam in a virtual image in a wearable device. The method includes capturing, with the digital color camera, an image of the display device, and determining, from the image, RGB values for each primary color. The method includes capturing, with a color-measurement device, a color-measurement value associated with each corresponding primary color at the display device, thereby acquiring a color-measurement value in an absolute color space. A conversion model for each color is determined using RGB values and the color-measurement values.

公开(公告)号：WO2021263196A1

公开(公告)日：2021-12-30

申请号：PCT/US2021/039233

申请日：2021-06-25

Applicant: MAGIC LEAP, INC.

Inventor： MESSER, Kevin ,  SCHUCK, Miller Harry, III. ,  MORLEY, Nicholas Ihle ,  HUANG, Po-Kang ,  SHAH, Nukul Sanjay ,  CAPPS, Marshall Charles ,  TAYLOR, Robert Blake

IPC: G09G5/00 ,  G09G2300/0452 ,  G09G2340/06 ,  G09G3/2003 ,  G09G5/10

Abstract: Disclosed are techniques for improving the color uniformity of a display of a display device. A plurality of images of the display are captured using an image capture device. The plurality of images are captured in a color space, with each image corresponding to one of a plurality of color channels. A global white balance is performed to the plurality of images to obtain a plurality of normalized images. A local white balance is performed to the plurality of normalized images to obtain a plurality of correction matrices. Performing the local white balance includes defining a set of weighting factors based on a figure of merit and computing a plurality of weighted images based on the plurality of normalized images and the set of weighting factors. The plurality of correction matrices are computed based on the plurality of weighted images.