US 12,711,570 B2Granted

Dual-screen visual aid display method and apparatus for people with low vision, and device

AssigneeHangzhou Dukang Technology Co., Ltd.

InventorsZezhi Gong, Xiang Ying, Xinwei Huang

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Abstract

The present disclosure provides a dual-screen visual aid display method and apparatus for people with low vision, and a device. The method includes: determining, on a main screen based on a current microscopic control zoom level selected by a user, position information of a microscopic area virtual frame with a display image as a reference; mapping, according to display parameters of the main screen and a resolution of a current display image on the main screen, the position information of the microscopic area virtual frame to position information of a microscopic highlight frame in a main screen coordinate system; scanning a moving state of the microscopic highlight frame under the main screen coordinate system to obtain starting point coordinates of the moved microscopic highlight frame; reversely mapping the starting point coordinates of the moved microscopic highlight frame to obtain starting point coordinates of the moved microscopic area virtual frame; and extracting, based on the width and height of the microscopic area virtual frame and the starting point coordinates of the moved microscopic area virtual frame, image content in the microscopic area virtual frame, and performing microscopic zooming, on a secondary screen, on the image content.

Claims19

Dependent claims

A dual-screen visual aid display method for people with low vision, comprising:

determining, on a main screen based on a current microscopic control zoom level zoomLevel selected by a user, position information of a microscopic area virtual frame with a display image as a reference, the position information comprising starting point coordinates (Zoomx, Zoomy) and a width and height (Zoomw, Zoomh) of the microscopic area virtual frame;
mapping, according to display parameters of the main screen and a resolution W0*H0 of a current display image on the main screen, the position information of the microscopic area virtual frame to position information of a microscopic highlight frame in a main screen coordinate system, the position information of the microscopic highlight frame comprising starting point coordinates (OSDx, OSDy) and a width and height (OSDw,OSDh) of the microscopic highlight frame;
scanning a moving state of the microscopic highlight frame under the main screen coordinate system to obtain starting point coordinates (OSDw′, OSDy′) of the moved microscopic highlight frame;
reversely mapping the starting point coordinates (OSDx′, OSDy′) of the moved microscopic highlight frame to obtain starting point coordinates (Zoomx′, Zoomy′) of the moved microscopic area virtual frame;
extracting, based on the width and height (Zoomw, Zoomh) of the microscopic area virtual frame and the starting point coordinates (Zoomx′, Zoomy′) of the moved microscopic area virtual frame, image content in the microscopic area virtual frame;
and
performing microscopic zooming, on a secondary screen, on the extracted image content in the microscopic area virtual frame.

4 more elements

A dual-screen visual aid display apparatus for people with low vision, comprising:

a position information determining unit, configured to determine, on a main screen based on a current microscopic control zoom level zoomLevel selected by a user, position information of a microscopic area virtual frame with a display image as a reference, the position information comprising starting point coordinates (Zoomx, Zoomy) and a width and height (Zoomw, Zoomh) of the microscopic area virtual frame;
a position information mapping unit, configured to map, according to display parameters of the main screen and a resolution W0*H0 of a current display image on the main screen, the position information of the microscopic area virtual frame to position information of a microscopic highlight frame in a main screen coordinate system, the position information of the microscopic highlight frame comprising starting point coordinates (OSDx, OSDy) and a width and height (OSDw,OSDh) of the microscopic highlight frame;
a state scanning and updating unit, configured to scan a moving state of the microscopic highlight frame under the main screen coordinate system to obtain starting point coordinates (OSDx′, OSDy′) of the moved microscopic highlight frame;
a position information reverse mapping unit, configured to reversely map the starting point coordinates (OSDx′, OSDy′) of the moved microscopic highlight frame to obtain starting point coordinates (Zoomx′, Zoomy′) of the moved microscopic area virtual frame;
a content extraction unit, configured to extract, based on the width and height (Zoomw, Zoomh) of the microscopic area virtual frame and the starting point coordinates (Zoomx′, Zoomy′) of the moved microscopic area virtual frame, image content in the microscopic area virtual frame;
and
a display control unit, configured to perform microscopic zooming, on a secondary screen, on the extracted image content in the microscopic area virtual frame.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/798,931Filed 9 Aug 2024
Priority: CN 202410525591.829 Apr 2024
Published: US 2025/0336030 A130 Oct 2025
Granted: 18 Aug 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G06T 3/40
Geometric image transformations in the plane of the image: scaling of whole images or parts thereof, e.g. expanding or contracting
G06F 3/14
Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for…: digital…
G06F 3/1446
Controlling a plurality of local displays, e.g. CRT and flat panel display: display composed of modules, e.g. video walls
G06T 11/10
Two-dimensional [2D] image generation: texturing; Colouring; Generation of textures or colours