Jason H Schaefer

US Patent:

20210215536, Jul 15, 2021

Filed:

Jan 21, 2021

Appl. No.:

17/154895

Inventors:

- Plantation FL, US
Lei Zhang - Sunnyvale CA, US
Etienne Gregoire Grossmann - Menlo Park CA, US
Nukul Sanjay Shah - Plantation FL, US
Ohad Zohar - Tel Aviv, IL
Robert Zito - Hillsdale NJ, US
Nicholas Ihle Morley - Deerfield Beach FL, US
Jason Schaefer - Coral Springs FL, US
Zhiheng Jia - Weston FL, US
Eric C. Browy - Meridian ID, US
Marshall Charles Capps - Austin TX, US
Kazunori Tanaka - Irvine CA, US
Grace Vesom - San Jose CA, US
John Monos - Venice CA, US

Assignee:

Magic Leap, Inc. - Plantation FL

International Classification:

G01J 3/02
G01J 3/46
G06T 7/80
G06T 7/90

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.