公开(公告)号：US11790498B1

公开(公告)日：2023-10-17

申请号：US17003645

申请日：2020-08-26

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Mahnaz Mohammadi ,  Shuang Wang ,  José Antonio Dominguez-Caballero ,  Chaohao Wang ,  Tobias Jung ,  Jun Miao

IPC: G06T5/00 ,  G09G5/14 ,  G06T5/40 ,  G06T5/20 ,  G09G5/38 ,  G02B27/01 ,  B60K35/00

CPC classification number: G06T5/009 ,  B60K35/00 ,  G02B27/0101 ,  G02B27/0172 ,  G06T5/20 ,  G06T5/40 ,  G09G5/14 ,  G09G5/38 ,  B60K2370/1529 ,  B60K2370/177 ,  B60K2370/25 ,  B60K2370/334 ,  B60K2370/52 ,  B60K2370/785 ,  G02B2027/014 ,  G02B2027/0118 ,  G02B2027/0138 ,  G09G2320/066 ,  G09G2360/144 ,  G09G2380/10

Abstract: Systems and methods are provided for displaying augmented reality image content perceived as being overlaid on background image content viewed through a light-transmissive viewing surface. Image processing circuitry may receive input augmented reality image data corresponding with a pixel position on the display panel, determine a perceived background brightness metric indicative of background brightness level at the pixel position based at least in part on captured background image data and an ambient lighting metric, determine a target tone mapping based at least in part on the perceived background brightness metric, and determine display augmented reality image data to be used by a display panel to display the augmented reality image content least in part by applying the target tone mapping to the input augmented reality image data.

公开(公告)号：US20230317020A1

公开(公告)日：2023-10-05

申请号：US18169685

申请日：2023-02-15

Applicant: Apple Inc.

Inventor： Francisco H Imai ,  Osborn F. de Lima ,  Jun Miao ,  Pradeep Nagesh

IPC: G09G3/34

CPC classification number: G09G3/3406 ,  G09G2360/144 ,  G09G2320/0646

Abstract: An electronic device may include a display, an ambient light sensor, and control circuitry. The control circuitry may use a mesopic vision model to compensate images that are displayed in low light conditions when the measured ambient light brightness is below a threshold. The mesopic vision model may use a tone mapping process and a color mapping process to compensate for the reduced color sensitivity of the retina in low light conditions. The control circuitry may iteratively adjust weights associated with the tone mapping process and the color mapping process until a perceived (retinal) version of the compensated image in the measured ambient light conditions closely matches a perceived (retinal) version of the original image in reference ambient light conditions. The control circuitry may use a joint optimization process that balances the contrast and color of the compensated image.