Wearable projection apparatus and projection method

Patent metadata

Field	Value
Publication number	US-9699425-B2
Application number	US-201414436405-A
Country	US
Kind code	B2
Filing date	Oct 31, 2014
Priority date	Apr 28, 2014
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A wearable projection apparatus and a projection method are provided, and the projection method comprises: acquiring color distribution information and brightness distribution information of a plurality of regions of a hand; determining modified color output parameters according to the acquired color distribution information of the regions of the hand and preset standard color information, and determining modified brightness output parameters according to the acquired brightness distribution information of the regions of the hand; controlling a projection module to output an image according to the determined color output parameters and the determined brightness output parameters. With the wearable projection apparatus and the projection method provided by embodiments of the present invention, an image projected by the wearable projection apparatus on the hand can have relatively higher uniformity in color and brightness.

First claim

What is claimed is:

1. A projection method of a wearable projection apparatus, comprising:
acquiring color distribution information and brightness distribution information of a plurality of regions of a hand;
determining modified color output parameters according to the acquired color distribution information of the regions of the hand and preset standard color information, and determining modified brightness output parameters according to the acquired brightness distribution information of the regions of the hand; and
controlling a projection module to output an image according to the determined color output parameters and the determined brightness output parameters, wherein:
the determining the modified color output parameters according to the acquired color distribution information of the regions of the hand and the preset standard color information, comprises:
determining a reference color value according to the acquired color distribution information of the regions of the hand, and determining the modified color output parameters according to the determined reference color value, the preset standard color information and the acquired color distribution information of the regions of the hand; and

the determining the modified color output parameters according to the determined reference color value, the preset standard color information and the acquired color distribution information of the regions of the hand, is performed by calculating using formulae as follows:

{

Δ
⁢

⁢
U

=

U
s

-

U
0

Δ
⁢

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V

=

V
s

-

V
0

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{

U
′

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(

x
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y

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=

U
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y

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U

V
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where, U′(x,y) is a modified red tone output parameter; V′(x,y) is a modified blue tone output parameter; U(x,y) is red tone information in the color distribution information of the regions of the hand; V(x,y) is blue tone information in the color distribution information of the regions of the hand; U s is red tone information in the preset standard color information; U 0 is a red tone value in the determined reference color value; V s is blue tone information in the preset standard color information; and V 0 is a blue tone value in the determined reference color value.

2. The projection method according to claim 1 , wherein the acquiring the color distribution information and the brightness distribution information of the regions of the hand, comprises:
acquiring RGB pattern information of the regions of the hand; and
determining the color distribution information and the brightness distribution information of the regions of the hand according to the acquired RGB pattern information of the regions of the hand.

3. The projection method according to claim 1 , wherein the reference color value is an average value of color information of all colors in a central region of the hand.

4. The projection method according to claim 1 , wherein the determining the modified brightness output parameters according to the acquired brightness distribution information of the regions of the hand, comprises:
determining brightness correction factors of the regions of the hand according to the acqu

Assignees

• Boe Technology Group Co Ltd

Inventors

• Chen Yanshun
• Zhao Xingxing
• Xu Qiushi
• Li Yaohui

Classifications

• H04N9/3173

  wherein the projection device is specially adapted for enhanced portability · CPC title

• G03B21/00

  Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B23/00) · CPC title

• H04N9/3185

  Geometric adjustment, e.g. keystone or convergence (optical or mechanical adjustment of convergence H04N9/317; using scanning means H04N3/22; optical or mechanical adjustments of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/14) · CPC title

• G03B21/567

  for colour projection (G03B21/58, G03B21/60 take precedence) · CPC title

• G03B21/206

  Control of light source other than position or intensity · CPC title