CN101661721A - Liquid crystal display device and image display method - Google Patents
Liquid crystal display device and image display method Download PDFInfo
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- CN101661721A CN101661721A CN200910109112A CN200910109112A CN101661721A CN 101661721 A CN101661721 A CN 101661721A CN 200910109112 A CN200910109112 A CN 200910109112A CN 200910109112 A CN200910109112 A CN 200910109112A CN 101661721 A CN101661721 A CN 101661721A
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Abstract
The invention discloses a liquid crystal display device which comprises a video signal input end used for receiving an original color video signal containing a color image; a liquid display screen; anoriginal image caching module used for caching the color image, a grayscale image converting module used for converting the color image into a grayscale image; an image gradient reinforcing module used for calculating the gradient value of the grayscale between each pixel point in the grayscale image and the pixel point of an adjacent display image, comparing the gradient value with a preset gradient threshold value, setting the brightness of the pixel point to be zero when the gradient value is smaller than the gradient threshold value, and increasing the integral brightness value of the pixel point or setting the brightness value of the pixel point to be a distinctive color when the gradient value is larger than the gradient threshold value, thus forming a reinforced image; and an imagesynthesis module used for synthesizing the color image and the reinforced image and then displaying the synthesized images on the liquid crystal display screen.
Description
Technical field
The present invention is relevant for a kind of liquid crystal indicator and method for displaying image, especially about a kind of display image liquid crystal indicator and display packing comparatively clearly.
Background technology
Along with the development of lcd technology, be widely used in every field as the display system of show tools with liquid crystal indicator.For example, in-vehicle display system has progressively become must joining of automobile.A kind of in-vehicle display system of prior art has a camera and a traditional liquid crystal indicator.This camera is used to take the object of motor vehicle environment, and as barrier or pedestrian, this liquid crystal indicator is used for the object that this camera photographs is shown.Like this, make the driver move backward or other operations the time can know easily whether motor vehicle environment has barrier or pedestrian, to avoid traffic hazard, guarantee traffic safety.
Yet, when this in-vehicle display system is operated in the faint place of ambient lights such as night or underpass, because the reflected light that object sent such as barrier or people are few, the brightness of object such as barrier or people is tending towards the same with ambient brightness, therefore can't be under dim background identification barrier or pedestrian etc. clearly, it is very inconvenient to cause this in-vehicle display system to use under above-mentioned environment.
A kind of method of solution is to assist demonstration installing infrared camera additional in the prior art, but owing to do not have infrared radiation and the environment of the barrier of vital signs to reach unanimity under the normal temperature, so still can't clearly show this barrier.
Summary of the invention
In order to solve the unsharp problem of prior art liquid crystal indicator display image, be necessary to provide a kind of display image liquid crystal indicator clearly.
Simultaneously, be necessary to provide a kind of display image distinct image display packing.
A kind of liquid crystal indicator, it comprises a video signal input terminal, is used to receive an original color vision signal that comprises coloured image; A LCDs, an original image cache module is used for this coloured image of buffer memory; A gray scale image modular converter is used for this coloured image is converted to gray scale image; An image gradient reinforced module, be used for calculating the Grad of the GTG between the pixel of each pixel of this gray scale image and adjacent display image, this Grad is compared with a predefined Grads threshold, when this Grad is changed to zero with this pixel brightness during less than this Grads threshold, when this Grad increases this pixel overall brightness value during greater than this Grads threshold or is set to a remarkable color, to form a reinforcement image; An image synthesis unit, be used for this coloured image and this reinforcement image synthetic after, be presented on the LCDs.
A kind of method for displaying image, it comprises step: receive an original color vision signal that comprises coloured image; This coloured image is converted to gray scale image; The Grad of the GTG in the calculating gray scale image between the pixel of each pixel and adjacent display image, this Grad is compared with a predefined Grads threshold, when this Grad is changed to zero with this pixel brightness during less than this Grads threshold, when this Grad increases this pixel overall brightness value during greater than this Grads threshold or is set to a certain remarkable color, strengthen image to form one; With this coloured image and this strengthen image synthetic after, be presented on the LCDs.
Liquid crystal indicator of the present invention since when Grad between the pixel of this pixel and adjacent display image during greater than this Grads threshold with this pixel overall brightness value increase or be set to a certain remarkable color, therefore can integral body is dim, the object brightness in the image that brightness is lower increases, so this liquid crystal indicator display image is more clear.
Method for displaying image of the present invention since when Grad between the pixel of this pixel and adjacent display image during greater than this Grads threshold with this pixel overall brightness value increase or be set to a certain remarkable color, therefore can integral body is dim, the object brightness in the image that brightness is lower increases, so this method for displaying image display image is more clear.
Description of drawings
Fig. 1 is the perspective view of liquid crystal indicator one better embodiment of the present invention.
Fig. 2 is the circuit module synoptic diagram of liquid crystal indicator 1 shown in Figure 1.
Modular structure synoptic diagram when Fig. 3 is liquid crystal indicator shown in Figure 21 work.
Fig. 4 is the flow chart of steps of the method for displaying image that adopted of this liquid crystal indicator 1.
Embodiment
Please refer to Fig. 1, Fig. 1 is the perspective view of liquid crystal indicator one better embodiment of the present invention.This liquid crystal indicator 1 comprises a video signal input terminal 10, a printed circuit board (PCB) 11 and a LCDs 12.This printed circuit board (PCB) 11 is positioned at the back of this display screen 12 and is connected with this display screen 12, and this video signal input terminal 10 is connected to this printed circuit board (PCB) 11.
Please refer to Fig. 2, Fig. 2 is the circuit module synoptic diagram of liquid crystal indicator 1 shown in Figure 1.This printed circuit board (PCB) 11 is provided with a gray scale image modular converter 20, gray scale image cache module 30, image gradient reinforced module 40, an original image cache module 50 and an image synthesis unit 60.This gray scale image modular converter 20 and this original image cache module 50 all are connected to this this video signal input terminal 10, this gray scale image cache module 30 is connected to gray scale image modular converter 20, this image gradient reinforced module 40 is connected to gray scale image cache module 30, and this image synthesis unit 60 is connected respectively to image gradient reinforced module 40, original image cache module 50 and display screen 12.
This gray scale image modular converter 20, this image gradient reinforced module 40 and this image synthesis unit 60 are realized that by one or more FPGA this gray scale image cache module 30 and original image cache module 50 can be realized by the RAM that is connected on this FPGA.In addition, this FPGA can be substituted by CPLD, and this RAM can be substituted by SRAM or DRAM.
Please refer to Fig. 3, the modular structure synoptic diagram when Fig. 3 is liquid crystal indicator shown in Figure 21 work.When this liquid crystal indicator 1 work, this video signal input terminal 10 is connected to an external video source 90.This external video source 90 can be the vision signal of video camera or camera collection, also can be CATV (cable television) or radiotelevision vision signal, perhaps other vision signals.
Please refer to Fig. 4, Fig. 4 is the flow chart of steps of the method for displaying image that adopted of this liquid crystal indicator 1.Below in conjunction with the method for displaying image that this liquid crystal indicator 1 is adopted, introduce the course of work and the principle of this liquid crystal indicator 1 in detail.
Step S1: reception one comprises the original color vision signal of coloured image.
This video signal input terminal 10 receives an original color vision signal that comprises coloured image, and this original color vision signal is sent to this gray scale image modular converter 20 and this original image cache module 50 respectively, this original image cache module 50 is with this coloured image buffer memory.
Step S2: this coloured image is converted to gray scale image.
This gray scale image modular converter 20 is converted to gray scale image with this coloured image.Coloured image is converted to gray scale image and can adopts canonical algorithm to carry out accurate Calculation, as Gray=0.299*R+0.587*G+0.114*B, also can simply adopt G data or other shortcut calculations, as Gray=(3R+6G+B)/10.Wherein, R, G, B are respectively the red, green, blue brightness value, and Gray is a GTG.Gray level video signal that comprises this gray scale image of these gray scale image modular converter 20 outputs is sent to gray scale image cache module 30.
Step S3: with this gray scale image buffer memory.
This gray scale image cache module 30 with this gray level video signal buffer memory after, be sent to this image gradient reinforced module 40.
Step S4: the Grad of the GTG in the calculating gray scale image between the pixel of each pixel and adjacent display image, this Grad is compared with a predefined Grads threshold, when this Grad is changed to zero with this pixel brightness during less than this Grads threshold, when this Grad increases this pixel overall brightness value during greater than this Grads threshold or is set to a certain remarkable color, strengthen image to form one.
The Grad of the GTG in these image gradient reinforced module 40 calculating gray scale images between the pixel of each pixel and adjacent display image, this Grad is compared with a predefined Grads threshold, when this Grad is changed to zero with this pixel brightness during less than this Grads threshold, when this Grad increases this pixel overall brightness value during greater than this Grads threshold or is set to a certain remarkable color, strengthen image to form one.Edge of image is strengthened the gradient detection algorithm that is dependent on image, for example Sobel algorithm or RobertsCross algorithm.The reinforcement vision signal that this image gradient reinforced module 40 will comprise this reinforcement image is sent to this image synthesis unit 60.
Step S5: with this coloured image and this strengthen image synthetic after, be presented on the LCDs.
This image synthesis unit 60 receives this from this image gradient reinforced module 40 and strengthens image from these original image cache module 50 these coloured images of reception, and this coloured image and this reinforcement image is synthetic, and exports this LCDs 12 demonstrations to.
Liquid crystal indicator of the present invention and method for displaying image, since when Grad between the pixel of this pixel and adjacent display image during greater than this Grads threshold with this pixel overall brightness value increase or be set to a certain remarkable color, therefore can integral body is dim, the object brightness in the image that brightness is lower increases, and therefore can reach the purpose of clear demonstration.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is when with being as the criterion that claim was defined.
Claims (12)
1. liquid crystal indicator, it comprises a video signal input terminal, be used to receive an original color vision signal and a LCDs that comprises coloured image, it is characterized in that: this liquid crystal indicator also comprises an original image cache module, is used for this coloured image of buffer memory; One gray scale image modular converter is used for this coloured image is converted to gray scale image; One image gradient reinforced module, be used for calculating the Grad of the GTG between the pixel of each pixel of this gray scale image and adjacent display image, this Grad is compared with a predefined Grads threshold, when this Grad is changed to zero with this pixel brightness during less than this Grads threshold, when this Grad increases this pixel overall brightness value during greater than this Grads threshold or is set to a remarkable color, to form a reinforcement image; One image synthesis unit, be used for this coloured image and this reinforcement image synthetic after, be presented on the LCDs.
2. liquid crystal indicator as claimed in claim 1 is characterized in that: this liquid crystal indicator also comprises a gray scale image cache module, is used for this gray scale image of buffer memory.
3. liquid crystal indicator as claimed in claim 2, it is characterized in that: this video signal input terminal is connected to this image synthesis unit through this gray scale image modular converter, gray scale image cache module, image gradient reinforced module in regular turn, this video signal input terminal is connected to this image synthesis unit through this original image cache module, and this image synthesis unit is connected to this LCDs.
4. liquid crystal indicator as claimed in claim 1 is characterized in that: this gray scale image modular converter is according to algorithm Gray=0.299*R+0.587*G+0.114*B, and wherein, R, G, B are respectively the red, green, blue brightness value, and Gray is a GTG.
5. liquid crystal indicator as claimed in claim 1 is characterized in that: this gray scale image modular converter is according to algorithm Gray=(3R+6G+B)/10, and wherein, R, G, B are respectively the red, green, blue brightness value, and Gray is a GTG.
6. liquid crystal indicator as claimed in claim 1 is characterized in that: this gray scale image modular converter, image gradient reinforced module and image synthesis unit are realized by one or more FPGA or CPLD.
7. liquid crystal indicator as claimed in claim 2 is characterized in that: this gray scale image cache module and original image cache module are realized by RAM, the SRAM or the DRAM that are connected on this FPGA.
8. liquid crystal indicator as claimed in claim 1 is characterized in that: edge of image is strengthened the gradient detection algorithm that is dependent on image, for example Sobel algorithm or Roberts Cross algorithm.
9. method for displaying image, it comprises step:
Receive an original color vision signal that comprises coloured image;
This coloured image is converted to gray scale image;
The Grad of the GTG in the calculating gray scale image between the pixel of each pixel and adjacent display image, this Grad is compared with a predefined Grads threshold, when this Grad is changed to zero with this pixel brightness during less than this Grads threshold, when this Grad increases this pixel overall brightness value during greater than this Grads threshold or is set to a certain remarkable color, strengthen image to form one;
With this coloured image and this strengthen image synthetic after, be presented on the LCDs.
10. method for displaying image as claimed in claim 9 is characterized in that: this method also comprises and is positioned at step " this coloured image is converted to gray scale image " afterwards " with this gray scale image buffer memory " step.
11. method for displaying image as claimed in claim 9, it is characterized in that it is according to algorithm Gray=0.299*R+0.587*G+0.114*B, wherein that step " is converted to gray scale image with this coloured image ", R, G, B are respectively the red, green, blue brightness value, and Gray is a GTG.
12. method for displaying image as claimed in claim 9 is characterized in that: it is according to algorithm Gray=(3R+6G+B)/10 that step " is converted to gray scale image with this coloured image ", and wherein, R, G, B are respectively the red, green, blue brightness value, and Gray is a GTG.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104702875A (en) * | 2013-12-18 | 2015-06-10 | 杭州海康威视数字技术股份有限公司 | Liquid crystal display equipment and video image displaying method |
| CN104875681A (en) * | 2015-06-16 | 2015-09-02 | 四川长虹佳华信息产品有限责任公司 | Dynamic vehicle-mounted camera control method based on application scenarios |
| CN108550348A (en) * | 2018-04-02 | 2018-09-18 | 深圳市华星光电技术有限公司 | The image processing method of display device |
| CN109616074A (en) * | 2019-01-31 | 2019-04-12 | 厦门天马微电子有限公司 | Display methods and display device |
| CN109994080A (en) * | 2017-12-29 | 2019-07-09 | 深圳市巨烽显示科技有限公司 | Ultra-wide degree grayscale display methods and device |
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| CN100496132C (en) * | 2007-05-09 | 2009-06-03 | 宁波大学 | A method of processing pseudo color for medical gray image signals |
| CN101119439A (en) * | 2007-08-22 | 2008-02-06 | 东风汽车有限公司 | Automatic control method for clear lane image shooting by vehicle-mounted camera |
| CN101437169B (en) * | 2008-12-19 | 2010-10-27 | 深圳市迅雷网络技术有限公司 | Method and apparatus for implementing black and white of color image |
| CN101562694B (en) * | 2009-05-26 | 2010-12-29 | 天津三星光电子有限公司 | Method for realizing functions of character extraction and automatic translation of digital camera |
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| CN104702875A (en) * | 2013-12-18 | 2015-06-10 | 杭州海康威视数字技术股份有限公司 | Liquid crystal display equipment and video image displaying method |
| CN104875681A (en) * | 2015-06-16 | 2015-09-02 | 四川长虹佳华信息产品有限责任公司 | Dynamic vehicle-mounted camera control method based on application scenarios |
| CN109994080A (en) * | 2017-12-29 | 2019-07-09 | 深圳市巨烽显示科技有限公司 | Ultra-wide degree grayscale display methods and device |
| CN109994080B (en) * | 2017-12-29 | 2021-07-09 | 深圳市巨烽显示科技有限公司 | Super-width gray scale display method and device |
| CN108550348A (en) * | 2018-04-02 | 2018-09-18 | 深圳市华星光电技术有限公司 | The image processing method of display device |
| WO2019192139A1 (en) * | 2018-04-02 | 2019-10-10 | 深圳市华星光电技术有限公司 | Image processing method for display device |
| CN108550348B (en) * | 2018-04-02 | 2020-04-03 | 深圳市华星光电技术有限公司 | Image processing method for display device |
| US10740872B2 (en) | 2018-04-02 | 2020-08-11 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Image processing method for display device |
| CN109616074A (en) * | 2019-01-31 | 2019-04-12 | 厦门天马微电子有限公司 | Display methods and display device |
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| CN101661721B (en) | 2011-07-20 |
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Effective date of registration: 20230802 Address after: 3rd Floor, Building B1, Wanjiang Fortune Plaza, No. 88 Ruixiang Road, Guandou Street, Jiujiang District, Wuhu City, Anhui Province 241060 Patentee after: Wuhu Tianma Automotive Electronics Co.,Ltd. Address before: 518000, Guangdong, Shenzhen, Futian District Shennan Road, building 22, South Airlines Patentee before: Tianma Micro-Electronics Co.,Ltd. |
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