CN101257640A - Stereoscopic video signal synthetic apparatus based on I2C bus control - Google Patents
Stereoscopic video signal synthetic apparatus based on I2C bus control Download PDFInfo
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- CN101257640A CN101257640A CNA2008100503683A CN200810050368A CN101257640A CN 101257640 A CN101257640 A CN 101257640A CN A2008100503683 A CNA2008100503683 A CN A2008100503683A CN 200810050368 A CN200810050368 A CN 200810050368A CN 101257640 A CN101257640 A CN 101257640A
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Abstract
I<2>C bus control based stereo video signal synthesizing device belongs to digital image processing technique field.In the present time-division stereo camera-shooting system, computer bus type image capture card is used for capturing image of right and left camera, and the image is displayed on the display screen alternately, thereby implementing stereoscopic image process, and the insufficiency mostly is real-time performance and stability.The invention which uses frequency-doubling technique for performing field duration compression to two video signals simultaneously, and 100Hz stereo video signal synthesizing circuit implements stereoscopic image process under the control of I<2>C bus controlled microprocessor. Therefore, the image quality is guaranteed, and image display is provided with real-time performance and stability.The invention can be applied in stereo electronic endoscope system of medical treatment field.
Description
Technical field
The present invention relates in a kind of three-dimensional camera system based on I
2The stereoscopic image processing device of the total line traffic control of C belongs to the digital image processing techniques field.
Background technology
The stereo display mode of the image relevant with the present invention is a time division type.Its implementation is two video cameras about image generation end is used, anthropomorphic dummy's left and right two Eye imagings, produce a pair of anaglyph signal, earlier this anaglyph signal is carried out process of frequency multiplication afterwards, be encoded into the about one tunnel alternate images signals again, just stereo-picture is handled, and alternately shows on display screen at last, sees shown in Figure 1.In the time division type three-dimensional camera system, because left image 1, right image 2 successively show, the modulation of the liquid crystal shutter plate of images of left and right eyes sight line before being installed at display screen and the polarising glass that the beholder wears block synchronously, make two of the people to watch left image 1 and right image 2 respectively, thereby obtain third dimension.
Relevant with the present invention one concrete based on I
2The frequency doubling technology of the total line traffic control of C comes from TV technology, see shown in Figure 2, after 50Hz vision signal input prime treatment circuit carries out light tone separation etc. and handles the vision signal of input, by the process of 50Hz vision signal input A/D change-over circuit, analog signal is converted into the RGB digital signal by sampling, quantification, coding.By will the field duration realizing frequency multiplication from 20ms boil down to 10ms circuit, the vision signal field frequency is brought up to 100Hz by 50Hz again.Concrete scheme is as follows, will be made of three field memories from 20ms boil down to 10ms circuit the field duration, and compression process is at I
2Control the input of three memories under the total line traffic control of C by clock signal, output change-over switch and finishing, the interlaced video signal of odd field and even field writes first memory and second memory by 50Hz field frequency alternately, the clock signal frequency that writes is F, then alternately read the interlaced video signal of odd field and even field, the clock signal frequency of reading is 2F, therefore from the time of reading half of write time, be that the field duration is by 20ms boil down to 10ms, so just the vision signal field frequency can be converted to 100Hz from 50Hz, the 3rd field memory is the buffer storage of vision signal.Owing to write and read and hocket, can understand this scheme from the situation of reading, see single channel such as left road (L) vision signal represented among Fig. 4, Fig. 5, the situation before the compression is represented by Fig. 4, situation after the compression is represented by Fig. 5, if first memory is read order is:
A1-sky-A3-sky
The order of reading of second memory is so:
Sky-A2-sky-A4
The vision signal of output still is:
A1-A2-A3-A4……
But field frequency is brought up to 100Hz by 50Hz, and the field duration is from 20ms boil down to 10ms.The maximum storage capacity of each field memory is 245760 words * 12.Vision signal after the compression shows on display screen through 100Hz vision signal output D/A change-over circuit and 100Hz vision signal output post processing electric circuit.The purpose that this frequency doubling technology will be realized is that removal of images shows flicker.Phase Alternation Line system field frequency in the television system is 50Hz at present, and the vision blank time is 1/50 second, and the TSC-system field frequency is 60Hz, and the vision blank time is 1/60 second, all tangible flickering can be arranged, and image is bright more, and flickering is strong more.Experiment shows, when field frequency reaches 85Hz when above, flickering is very slight, when 95Hz is above, discovers less than flicker substantially.If reach more than the 100Hz, especially reach 120Hz when above, human eye is discovered fully less than flicker.
In the time division type three-dimensional camera system, existing stereo-picture processing scheme is to adopt computer bus formula image pick-up card to gather the image of left and right cameras, alternately shows on display screen.
Summary of the invention
The electric Endoscope that medical field uses requires to have higher real-time, stability and image quality.And described background technology have its deficiency in conjunction with formed technical scheme, mainly show on real-time and the stability, this be because, (1) owing to the multitask of computer processes and the uncontrollability of resource, being embodied in the image processing aspect is exactly the phenomenons such as pause, hangover even stagnation that image occurs.(2) computer bus formula image pick-up card relies on operating system work, so the stability of stereo display software relies on the stability of operating system.In order to overcome the above-mentioned deficiency of prior art, we have proposed one and have themed as based on I
2The technical scheme of the stereoscopic video signal synthetic apparatus of the total line traffic control of C.
This scheme is to realize like this, see shown in Figure 3, this device comprises the left road circuit that will be made of from 20ms boil down to 10ms circuit the field duration left ccd video camera, 50Hz left video signal input A/D change-over circuit, a left side, and the identical with it right wing circuit that will constitute the field duration from 20ms boil down to 10ms circuit by right ccd video camera, the right vision signal input of 50Hz A/D change-over circuit, the right side, and all be connected another termination 100Hz stereo video signals output D/A change-over circuit of 100Hz stereo video signals combiner circuit with 100Hz stereo video signals combiner circuit; And, 50Hz left video signal input A/D change-over circuit, a left side will the field duration from 20ms boil down to 10ms circuit, the right vision signal input of 50Hz A/D change-over circuit, the right side will the field duration from 20ms boil down to 10ms circuit, 100Hz stereo video signals combiner circuit, 100Hz stereo video signals output D/A change-over circuit all with based on I
2The microprocessor of the total line traffic control of C links to each other.
Described based on I
2The course of work of the stereoscopic video signal synthetic apparatus of the total line traffic control of C is, is example with the Phase Alternation Line system, left road circuit, right wing circuit respectively with left and right two-path video signal field period from 20ms boil down to 10ms, see Fig. 4, shown in Figure 5, but based on I
2The microprocessor control of the total line traffic control of C down, two-path video signal after the compression is complementary in time, see shown in Figure 5, two-path video signal after will being compressed according to time division type stereo display mode by 100Hz stereo video signals combiner circuit is synthetic, though the signal of being exported is continuous in time,, left road signal, right wing signal are alternately arranged, see shown in Figure 6ly, having constituted field frequency is the three-dimensional signal of 100Hz.Stereo video signals after synthetic is handled through 100Hz stereo video signals output D/A change-over circuit again, shows on display.The lcd modulation screen that the observer passes through to install additional before the passive polarising glass worn and the display can be seen the image with stereoeffect.If S-SYSTEM is a TSC-system, then said process is brought up to 120Hz with field frequency by 60Hz.
This scheme is to realize the processing of time division type stereo-picture with hardware mode fully, thereby has overcome the deficiencies in the prior art, and under the prerequisite that guarantees picture quality, image shows to have real-time and stability.
Description of drawings
Fig. 1 is a time division type stereo display schematic diagram.Fig. 2 is based on I in the existing TV technology
2The frequency doubling technology scheme block diagram of the total line traffic control of C.Fig. 3 be the present invention based on I
2The stereoscopic video signal synthetic apparatus block diagram of the total line traffic control of C, the double accompanying drawing that makes an abstract of this figure.Fig. 4 is the left side (L) of field duration uncompressed, right (R) two-path video signal waveform schematic diagram.Fig. 5 be the field duration respectively through the left side of overcompression (L), right (R) two-path video signal waveform schematic diagram.Fig. 6 be the field duration respectively through the left side of overcompression (L), right (R) two-path video signal synthesizes the waveform schematic diagram of one tunnel vision signal.
Embodiment
A kind of concrete playback system of this scheme is such, see shown in Figure 3, this device comprises by left ccd video camera, 50Hz left video signal input A/D change-over circuit, the left road circuit that a left side will constitute from 20ms boil down to 10ms circuit the field duration, and it is identical with it by right ccd video camera, the right vision signal input of 50Hz A/D change-over circuit, the right right wing circuit that will constitute the field duration from 20ms boil down to 10ms circuit, and all be connected with 100Hz stereo video signals combiner circuit, this 100Hz stereo video signals combiner circuit is a kind of digital video signal adder circuit, another termination 100Hz stereo video signals output D/A change-over circuit of 100Hz stereo video signals combiner circuit; And, 50Hz left video signal input A/D change-over circuit, a left side will the field duration from 20ms boil down to 10ms circuit, the right vision signal input of 50Hz A/D change-over circuit, the right side will the field duration from 20ms boil down to 10ms circuit, 100Hz stereo video signals combiner circuit, 100Hz stereo video signals output D/A change-over circuit all with based on I
2The microprocessor of the total line traffic control of C links to each other.
Claims (2)
1, a kind of based on I
2The stereoscopic video signal synthetic apparatus of the total line traffic control of C, it is characterized in that, this device comprises by left ccd video camera, 50Hz left video signal input A/D change-over circuit, the left road circuit that a left side will constitute from 20ms boil down to 10ms circuit the field duration, and it is identical with it by right ccd video camera, the right vision signal input of 50Hz A/D change-over circuit, the right right wing circuit that will constitute the field duration from 20ms boil down to 10ms circuit, and all be connected another termination 100Hz stereo video signals output D/A change-over circuit of 100Hz stereo video signals combiner circuit with 100Hz stereo video signals combiner circuit; And, 50Hz left video signal input A/D change-over circuit, a left side will the field duration from 20ms boil down to 10ms circuit, the right vision signal input of 50Hz A/D change-over circuit, the right side will the field duration from 20ms boil down to 10ms circuit, 100Hz stereo video signals combiner circuit, 100Hz stereo video signals output D/A change-over circuit all with based on I
2The microprocessor of the total line traffic control of C links to each other.
2, stereoscopic video signal synthetic apparatus according to claim 1 is characterized in that, described 100Hz stereo video signals combiner circuit is a kind of digital video signal adder circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100503683A CN101257640A (en) | 2008-02-04 | 2008-02-04 | Stereoscopic video signal synthetic apparatus based on I2C bus control |
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| CNA2008100503683A CN101257640A (en) | 2008-02-04 | 2008-02-04 | Stereoscopic video signal synthetic apparatus based on I2C bus control |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147523A (en) * | 2011-03-24 | 2011-08-10 | 姚斌 | Biological digital microscope with double ccd (charge coupled device) light sensitive elements and photographic image processing method thereof |
| CN102577404A (en) * | 2009-11-06 | 2012-07-11 | 索尼公司 | Three dimensional (3D) video for two-dimensional (2D) video messenger applications |
| CN103932660A (en) * | 2014-04-28 | 2014-07-23 | 深圳先进技术研究院 | Endoscope |
| US10063839B2 (en) | 2010-12-13 | 2018-08-28 | Nokia Technologies Oy | Method and apparatus for 3D capture synchronization |
-
2008
- 2008-02-04 CN CNA2008100503683A patent/CN101257640A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102577404A (en) * | 2009-11-06 | 2012-07-11 | 索尼公司 | Three dimensional (3D) video for two-dimensional (2D) video messenger applications |
| CN102577404B (en) * | 2009-11-06 | 2015-12-09 | 索尼公司 | For three-dimensional (3D) video of two dimension (2D) video messenger application |
| US10063839B2 (en) | 2010-12-13 | 2018-08-28 | Nokia Technologies Oy | Method and apparatus for 3D capture synchronization |
| US10999568B2 (en) | 2010-12-13 | 2021-05-04 | Nokia Technologies Oy | Method and apparatus for 3D capture synchronization |
| CN102147523A (en) * | 2011-03-24 | 2011-08-10 | 姚斌 | Biological digital microscope with double ccd (charge coupled device) light sensitive elements and photographic image processing method thereof |
| CN102147523B (en) * | 2011-03-24 | 2012-11-21 | 姚斌 | Biological digital microscope with double ccd (charge coupled device) light sensitive elements and photographic image processing method thereof |
| CN103932660A (en) * | 2014-04-28 | 2014-07-23 | 深圳先进技术研究院 | Endoscope |
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Open date: 20080903 |