US 12,223,741 B2
Generation of artificial color images from narrow spectral band data aboard a camera-equipped vehicle
Tzvi Philipp, Bet Shemesh (IL); Eran Kishon, Hod Hasharon (IL); and Michael Slutsky, Kefar-Saba (IL)
Assigned to GM Global Technology Operations LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Dec. 21, 2021, as Appl. No. 17/557,448.
Prior Publication US 2023/0196790 A1, Jun. 22, 2023
Int. Cl. G06V 20/58 (2022.01); B60W 50/14 (2020.01); G02B 27/01 (2006.01); G06V 10/25 (2022.01)
CPC G06V 20/584 (2022.01) [B60W 50/14 (2013.01); G02B 27/01 (2013.01); G06V 10/25 (2022.01); B60W 2050/146 (2013.01); B60W 2420/403 (2013.01); G02B 2027/0196 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A visual perception system comprising:
a liquid crystal polarized gratings (LCPG) scanning camera configured to capture full color pixel images of a target object, and to process the full color pixel images through a narrow band pass filter (BPF), such that the narrow BPF outputs monochromatic pixel images of the target object, wherein the narrow BPF is centered on about 600 nanometers (nm), has a bandwidth of about 40 nm, and a full width half maximum (FWHM) of about 30 nm;
a color sensor equipped with a color filter array (CFA), wherein the color sensor and the CFA are configured to receive the monochromatic pixel images from the narrow BPF, and wherein the color sensor has at least three color channels each corresponding to different colors of spectral data in the monochromatic pixel images; and
a classifier node configured, using a predetermined classification decision tree, to classify constituent pixels of the monochromatic pixel images into one of a plurality of color bins as a corresponding color of interest, including calculating respective probabilities of the constituent pixels being red, yellow, or green as the corresponding color of interest, and thereafter outputting a color estimate having a maximum of the probabilities.