CN101478630A - Multifunctional portable electronic vision aid - Google Patents
Multifunctional portable electronic vision aid Download PDFInfo
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- CN101478630A CN101478630A CNA2008103066560A CN200810306656A CN101478630A CN 101478630 A CN101478630 A CN 101478630A CN A2008103066560 A CNA2008103066560 A CN A2008103066560A CN 200810306656 A CN200810306656 A CN 200810306656A CN 101478630 A CN101478630 A CN 101478630A
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Abstract
The present invention relates to a multifunctional portable electronic vision aiding device which comprises an image collecting unit, an image processing unit, a character recognizing unit, an intelligent determining unit and an image display unit which are connected in turn. A control unit thereof is connected with the image collecting unit, the image processing unit, the character recognizing unit. The intelligent determining unit, the image display unit, a data communication interface, a video decoding unit, an audio decoding unit and an audio broadcasting unit. A storing unit is connected with the image collecting unit, the image processing unit, the intelligent determining unit, the video decoding unit and the audio decoding unit. The video decoding unit is connected with the image display unit. The audio decoding unit is connected with the audio broadcasting unit. The multifunctional portable electronic vision aiding device of the invention can amplify the papery character or electronic book or increase the display definition for improving the reading capability of poor-sight patient and the old, broadcasting audio and video documents, realizing multimedia function, enabling the people with poor sight to see and listen, and increasing the amusement property.
Description
Technical field
The present invention relates to a kind of visual aids, relate in particular to and a kind ofly the papery literal can be amplified or improve the definition of its demonstration, to improve low eyesight patient and the elderly's reading ability, again can audio plays and video file, realize the multifunctional portable electronic vision aid of multimedia function.
Background technology
Low eyesight crowd, especially patient such as amblyopia and presbyopia exist the obstacle of various degree when reading common printed product such as books, newspaper.Traditional visual aids generally all is an optical device, as magnifying glass, reading glasses etc., these equipment can only amplify the literal on the paper spare together with background, can not filter out background and outstanding literal, therefore still there is the not enough problem of definition, can't reaches very desirable helping to low eyesight crowd and look effect.Electronic viewing aid has appearred thus, but present electronic viewing aid can only solve the Dyslexia problem, function ratio is more single, can't satisfy low eyesight person's amusement requirement, can not coordinate mutually with the epoch that this information high development, people's quality of life improve greatly.
Summary of the invention
The present invention mainly solves original electronic viewing aid can only solve the Dyslexia problem, and function ratio is more single, can't satisfy the technical problem that low eyesight person's amusement requires; Provide a kind of and the papery literal can be amplified or improve the definition of its demonstration, to improve low eyesight patient and the elderly's reading ability, again can audio plays and video file, realize the multifunctional portable electronic vision aid of multimedia function.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: the present invention includes control unit, memory cell and the image acquisition units that links to each other successively, graphics processing unit, word recognition unit, the intelligent decision unit, image-display units, control unit and image acquisition units, graphics processing unit, word recognition unit, the intelligent decision unit, image-display units links to each other, image acquisition units, graphics processing unit links to each other with memory cell, the intelligent decision unit links to each other with memory cell, also comprise data communication interface, video decoding unit, audio decoding unit, audio playing unit, data communication interface links to each other with described control unit, video decoding unit, audio decoding unit and described control unit, memory cell links to each other, video decoding unit also links to each other with described image-display units, audio decoding unit links to each other with audio playing unit, and audio playing unit links to each other with described control unit.Literal on the papery obtains by image acquisition units, send cell stores then on the one hand, giving graphics processing unit on the other hand handles, make literal more clear, by word recognition unit literal is discerned again, the direction of literal is judged by the intelligent decision unit, if correctly then directly send image-display units to show, then be rotated as if incorrect, send image-display units to show again, being convenient to low eyesight person can clearly read.Data communication interface can link to each other with computer, MP3, MP4 data are put into memory cell down from the computer copy, under the control of control unit, video decoding unit, audio decoding unit obtain video, voice data and decode accordingly from memory cell, decoded video data send image-display units to show, decoded voice data send audio playing unit to play, and low eyesight person can be listened and can see, realize multimedia function, improve recreational.Also can be by data communication interface from computer copy e-book down, the reader amplifies, literal clearly by being shown to by image-display units after the image processing again, is convenient to low eyesight person and reads.
As preferably, described audio decoding unit comprises frame parse module, Hofmann decoding module, inverse transform module, synthesis filter, inverse discrete cosine transformation module, the leggy synthesis filter that links to each other successively, the frame parse module links to each other with described memory cell, and the leggy synthesis filter links to each other with described audio playing unit.The MP3 data that memory cell is come solve frame head information and side information by the frame parse module, then solve bit distribution information by the Hofmann decoding module, in inverse transform module, utilize spectral coefficient, in synthesis filter, 32 seat tape merges are become a broadband signal, carry out inverse discrete cosine transformation again, obtain 18 continuous frequency spectrums, at last by the leggy synthesis filter with these spectral conversion to time domain, finish waveform reconstruct, generate stereo pcm audio data, be sent to audio playing unit and play, it is beautiful stereo that low eyesight person can be heard.
As preferably, described video decoding unit comprises demultiplexing module and the motion decoder module, the texture decoder module that link to each other with demultiplexing module, the motion decoder module connects motion compensating module, the output of the output of motion compensating module, texture decoder module all connects reconstruction video subject table module, the output of reconstruction video subject table module both linked to each other with motion compensating module, link to each other with described image-display units again, demultiplexing module links to each other with described memory cell.Video decode comprises motion decoding and texture decoder.The MP4 data that memory cell is come are at first handled through demultiplexing, then motion decoding back obtains motion vector and carries out motion compensation, texture decoder obtains residual values, with these two parts combine could reconstruction video subject table, send image-display units to show at last, make low eyesight person can see movable images such as film.
As preferably, described texture decoder module comprises variable length decoding module, inverse scan module, contrary DC/AC prediction module, inverse quantization module, the inverse discrete cosine transform module that links to each other successively, the input of described variable length decoding module links to each other with the output of demultiplexing module, the output termination reconstruction video subject table module of described inverse discrete cosine transform module.
As preferably, described control unit comprises continuous system flow automatic control module, controller module, is connected with plurality of keys on the controller module, and the system flow automatic control module links to each other with described image-display units.The user is provided with or controls operating state by pressing button, and signalization and control signal are issued other corresponding work module by controller module, system flow automatic control module after handling, and make it to carry out work by user's needs.
As preferably, described image acquisition units adopts camera, comprises camera lens module, digital image acquisition module, A/D modular converter, and camera lens module connects digital image acquisition module, digital image acquisition module connects the A/D modular converter, and the output of A/D modular converter connects described graphics processing unit, memory cell.Camera lens module is collected light and is entered the induction zone of induction light intensity when work, and promptly digital image acquisition module becomes digital signal to flow to graphics processing unit and memory cell analog signal conversion such as image by the A/D modular converter again.
As preferably, described graphics processing unit comprises automatic exposure control module, automatic gain control module, Automatic white balance control module, auto brightness control module, color saturation control module, tone control module, acutance control module, the gamma correction control module that links to each other successively, the automatic exposure control module links to each other with described image acquisition units, memory cell, and the gamma correction control module links to each other with described word recognition unit.
As preferably, described intelligent decision unit comprises that the standard words library module, the context intelligent decision that link to each other successively search module, statistics discrimination module, judged result output module.
The invention has the beneficial effects as follows: the papery reading data converts digital signal to by image acquisition units, electronic reading data such as e-book deposit memory cell in by data communication interface, become size, typesetting format and color contrast pattern clear and rational, that convenient low eyesight patient reads after these digital signals process image processing, the intelligent conversion, definition and multiplication factor all are much higher than traditional visual aids.On the other hand, deposit sound, the video files such as MP3, MP4 of memory cell in by data communication interface, behind audio decoder, video decode, play stereo by audio playing unit, by the image-display units playing video file, realize multimedia function, low eyesight person can be seen and can listen, improve recreational, convenient greatly and enriched low eyesight patient's life.
Description of drawings
Fig. 1 is that a kind of circuit of the present invention connects block diagram.
Fig. 2 is that a kind of circuit of sound intermediate frequency decoding unit of the present invention connects block diagram.
Fig. 3 is that a kind of circuit of video decoding unit among the present invention connects block diagram.
Fig. 4 is the frame decoding flow chart of video decoding unit among the present invention.
Fig. 5 is that a kind of circuit of control unit among the present invention connects block diagram.
Fig. 6 is that a kind of circuit of image acquisition units among the present invention connects block diagram.
Fig. 7 is that a kind of circuit of graphics processing unit among the present invention connects block diagram.
Fig. 8 is that a kind of circuit of intelligent decision unit among the present invention connects block diagram.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment 1: a kind of multifunctional portable electronic vision aid of present embodiment, as shown in Figure 1, comprise control unit 1, memory cell 2, data communication interface 8, video decoding unit 9, audio decoding unit 10, audio playing unit 11 and the image acquisition units 3, graphics processing unit 4, word recognition unit 5, intelligent decision unit 6, the image-display units 7 that link to each other successively.Control unit 1 links to each other with image acquisition units 3, graphics processing unit 4, word recognition unit 5, intelligent decision unit 6, image-display units 7, data communication interface 8, video decoding unit 9, audio decoding unit 10, audio playing unit 11, memory cell 2 links to each other with image acquisition units 3, graphics processing unit 4, intelligent decision unit 6, video decoding unit 9, audio decoding unit 10, video decoding unit 9 links to each other with image-display units 7, and audio decoding unit 10 links to each other with audio playing unit 11.
As shown in Figure 5, control unit 1 comprises continuous system flow automatic control module 1-1, controller module 1-2, is connected with ten button 1-3 on the controller module 1-2, and system flow automatic control module 1-1 links to each other with image-display units 7.The controller module major function is to accept user's instruction, sends to other corresponding work module by the system flow automatic control module after treatment.Ten by ten orders of key control, the corresponding button of each order, be respectively power key, HOLD key, the key that fixes, go up key, following key, left button, right button, determine key, return key and entree singly-bound, the any control command of user in reading process all sent instruction by button, coding through controller module sends to the system flow automatic control module.The system flow automatic control module is responsible for controlling the operation of whole visual aids, and the running status that sends current visual aids is to controller module.The image of the synthetic current system running state of control unit shows the prompting image of current running status by image display, and picture cues is very important for low eyesight user.In the present embodiment, system flow automatic control module and controller module all adopt the ZR36482BGCF of the ZR36 series of producing based on ZORAN company to realize.
As shown in Figure 6, image acquisition units 3 adopts camera, comprises camera lens module 31, digital image acquisition module 32, A/D modular converter 33.Camera lens module 31 connects digital image acquisition module 32, and digital image acquisition module 32 connects A/D modular converter 33, and the output map interlinking of A/D modular converter 33 is as processing unit 4, memory cell 2.Camera lens module is collected light and is entered the induction zone of induction light intensity, and promptly digital image acquisition module becomes digital signal to flow to graphics processing unit and memory cell analog signal conversion such as image by the A/D modular converter again.In the present embodiment, digital image acquisition module and A/D modular converter adopt the OV7670 of the OV76XX series of OmniVision Technologies company product.
As shown in Figure 7, graphics processing unit 4 comprises automatic exposure control module 41, automatic gain control module 42, Automatic white balance control module 43, auto brightness control module 44, color saturation control module 45, tone control module 46, acutance control module 47, the gamma correction control module 48 that links to each other successively, automatic exposure control module 41 links to each other with image acquisition units 3, memory cell 2, and gamma correction control module 48 links to each other with word recognition unit 5.The automaticity of automatic exposure control module is the highest, and being provided with is automatic decision, can not artificially revise, use this set in most of the cases can obtain a normal image, this set designs in order farthest to reduce operate miss, all is by self-determining as metering mode, ISO setting or the like.The automatic gain control module is to the noise spot in the view data removal image that reads from memory cell, to improve the accuracy of literal identification.The major function of Automatic white balance control module is to make the large-screen splicing wall technology that good color consistency be arranged, under darker light, seem just not to be white owing under ordinary ray, look like the thing of white colour, so can revise the change of light automatically.The major function of auto brightness control module is with the image enhancing contrast ratio behind the removal noise, and adjusts brightness adaptively according to the characteristic of image itself, increases discrimination.The major function of color saturation control module is, the white light composition that mixes when spectrum colour the more, just heal when unsaturated, perhaps when the reflectivity height of object to a certain narrower wave band of spectrum, and the very low or not reflection to the reflectivity of other wavelength, the saturation of this color can be regulated the purity of color when high automatically.When acutance is high, can allows you think that the edge is clear especially sharp keen when videotex, picture, but allow the people think that some is dazzling unavoidably, and when acutance is low, can allow you think that the edge is very unintelligible when videotex, picture.The acutance control module can be regulated the edge of text, picture automatically to optimum state.The function of tone control module is to adjust lightness, and the lightness of things objective reality, the light source color of form and aspect are reflected through overregulating really, and the scope of tone is 0～255, is 256 kinds of tones altogether.The function of gamma correction control module is to make whole screen show that evenly color, white balance seamlessly transit, and reduce mosaic phenomenon to greatest extent, strengthens picture stereovision, the uniformity, effectively improves image quality.Be same drive current, its luminous intensity difference; Also there be the discrete of parameter between the different pins between the drive IC, with a slice drive IC, make the brightness of LCD display also present the discretization phenomenon like this, for solving the brightness irregularities that this discrete phenomena produces, except LCD being carried out the further refinement sorting, also need the Control Parameter that shows module is carried out initialization, guaranteed the brightness uniformity between module like this.Treatment of picture is the core of system.At first, on original camera data, get partial data,, be mapped in the intermediate layer buffer of LCD or VGA size, in this process, simultaneously interpolation result is carried out brightness, contrast adjustment according to quick bilinear interpolation algorithm according to the view-finder size.When handling black and white image, also need in interim buffer, carry out the binaryzation operation.In conjunction with the recognition result information in the word recognition unit integration entire image, and send the intelligent decision unit to.
As shown in Figure 8, intelligent decision unit 6 comprises that successively the standard words library module 61, the context intelligent decision that link to each other search module 62, statistics discrimination module 63, judged result output module 64.The dictionary that contains a large amount of Chinese and englishes in the standard words library module is to search the standard that module provides intelligent decision for the context intelligent decision.The context intelligent decision is searched module each is searched all speech by the recognition result literal that word recognition unit identification draws in the standard words library module, and with in fact hereinafter comparing of this character in the recognition result, if recognition result in fact hereinafter all can not in the standard words library module, find corresponding word, so just think that this word can not become speech, and this result is passed to the statistics discrimination module.The one-tenth speech rate of all characters in the statistics discrimination module statistics recognition result full text.Through a large amount of facts have proved, if in the passage assembly speech quantity of all characters divided by total number of characters of article less than certain numerical value, can think that so this section literal is insignificant mess code.In reading process, if the user misplaces papery written historical materials direction accidentally, though can draw the identification conclusion so, but nonsensical mess code.Through the judgement of statistics discrimination module, effectively whether the result that can draw this time scanning identification conclusion.By the system's automatic flow control module in the control unit image is rotated operation, and carry out identification process again, rotate to the tram of the document up to image, the position that can be identified just, and then send data to image-display units.
In the present embodiment, graphics processing unit, word recognition unit, intelligent decision unit all adopt based on the ZR36 family chip of ZORAN company and realize.Memory cell is realized by HYNIX memory HY27US08561A-TPCB and HY5PS121621CFP.
As shown in Figure 2, audio decoding unit 10 comprises frame parse module 101, Hofmann decoding module 102, inverse transform module 103, synthesis filter 104, inverse discrete cosine transformation module 105, the leggy synthesis filter 106 that links to each other successively, frame parse module 101 links to each other with memory cell 2, and leggy synthesis filter 106 links to each other with audio playing unit 11.Audio decoding unit is that the ZR36482BGCF of the ZR36 series of being produced by ZORAN company finishes.The MP3 data of at first memory cell being come are carried out frame by the frame parse module and are unpacked, solve frame head information and side information, solve bit distribution information by the Hofmann decoding module then, then in inverse transform module, utilize spectral coefficient, in synthesis filter, 32 seat tape merges are become a broadband signal, 18 spectrum values are carried out 32 contrary modified model discrete cosine transforms in the inverse discrete cosine transformation module, it is 18 continuous frequency spectrums of 32 that 576 spectrum values that generate are transformed into length, by 18 computings, the leggy synthesis filter with these spectral conversion to time domain, finish waveform reconstruct, generate stereo pcm audio data, be sent to audio playing unit at last and play out stereo.
As shown in Figure 3, video decoding unit 9 comprises demultiplexing module 91 and the motion decoder module 92, the texture decoder module 93 that link to each other with demultiplexing module 91.Demultiplexing module 91 links to each other with memory cell 2, accepts the video data that memory cell is come.Texture decoder module 93 comprises variable length decoding module 931, inverse scan module 932, contrary DC/AC prediction module 933, inverse quantization module 934, the inverse discrete cosine transform module 935 that links to each other successively, and the input of variable length decoding module 931 links to each other with the output of demultiplexing module 91.Motion decoder module 92 connects motion compensating module 94, the output of the output of motion compensating module 94, inverse discrete cosine transform module 935 all connects reconstruction video subject table module 95, the output of reconstruction video subject table module 95 both linked to each other with motion compensating module 94, linked to each other with image-display units 7 again.Video decoding unit also is that the ZR36482BGCF of the ZR36 series of being produced by ZORAN company finishes.Decode procedure recovers the process of object video platform (VOP) data in fact exactly from the video coding code stream.Video decode has motion decoding and texture decoder.Only contain texture information in the I frame, therefore need only decode texture information can recover the I frame.And not only comprise texture information in the P frame, also comprise movable information, so palpus decoding moving information obtains motion vector and also carries out motion compensation.In addition, also must carry out texture decoder and obtain residual values, these two parts be combined to rebuild the P frame, flow to image-display units at last, make low eyesight person can see movable images such as film.
As shown in Figure 4, the realization of decoding mainly provides a simple interface function, calls during for decoding.This interface function provides 5 inlets according to the different needs and the different phase of decoding.In 5 interface functions: call when 4 confessions initialization, preliminary treatment and subsequent treatment, 1 is the realization function of frame decoding.Video sequence is looked order according to video object layer VOL, object video platform VOP, macro block MB and is weaved into a string code stream.Program at first solves the head of VOL and VOP from code stream, be that unit decodes with the macro block according to these headers then.Function is made in the MB decoding separately, also is at first to solve header, judges macro block (mb) type in view of the above: MB, interframe MB, interframe 4VMB in the frame.The MB decoding is to be that unit makes texture decoder with 1 in the frame, and the texture value that solves deposits in the macro block buffer area at last; Interframe MB decoding is to solve motion vector MV earlier, carrying out motion compensation according to MV obtains predicted value and deposits the macro block buffer area in, be that unit carries out texture decoder again with the piece, solve residual values and deposit among the Block, Block is joined in the macro block buffer area obtain end product at last.
Claims (8)
- [claim 1] a kind of multifunctional portable electronic vision aid, comprise control unit (1), memory cell (2) and the image acquisition units (3) that links to each other successively, graphics processing unit (4), word recognition unit (5), intelligent decision unit (6), image-display units (7), control unit (1) and image acquisition units (3), graphics processing unit (4), word recognition unit (5), intelligent decision unit (6), image-display units (7) links to each other, image acquisition units (3), graphics processing unit (4) links to each other with memory cell (2), intelligent decision unit (6) links to each other with memory cell (2), it is characterized in that also comprising data communication interface (8), video decoding unit (9), audio decoding unit (10), audio playing unit (11), data communication interface (8) links to each other with described control unit (1), video decoding unit (9), audio decoding unit (10) and described control unit (1), memory cell (2) links to each other, video decoding unit (9) also links to each other with described image-display units (7), audio decoding unit (10) links to each other with audio playing unit (11), and audio playing unit (11) links to each other with described control unit (1).
- [claim 2] multifunctional portable electronic vision aid according to claim 1, it is characterized in that described audio decoding unit (10) comprises frame parse module (101), Hofmann decoding module (102), inverse transform module (103), synthesis filter (104), inverse discrete cosine transformation module (105), the leggy synthesis filter (106) that links to each other successively, frame parse module (101) links to each other with described memory cell (2), and leggy synthesis filter (106) links to each other with described audio playing unit (11).
- [claim 3] multifunctional portable electronic vision aid according to claim 1, it is characterized in that described video decoding unit (9) comprises demultiplexing module (91) and the motion decoder module (92) that links to each other with demultiplexing module (91), texture decoder module (93), motion decoder module (92) connects motion compensating module (94), the output of motion compensating module (94), the output of texture decoder module (93) all connects reconstruction video subject table module (95), the output of reconstruction video subject table module (95) both linked to each other with motion compensating module (94), link to each other with described image-display units (7) again, demultiplexing module (91) links to each other with described memory cell (2).
- [claim 4] multifunctional portable electronic vision aid according to claim 3, it is characterized in that described texture decoder module (93) comprises variable length decoding module (931), inverse scan module (932), contrary DC/AC prediction module (933), inverse quantization module (934), the inverse discrete cosine transform module (935) that links to each other successively, the input of described variable length decoding module (931) links to each other with the output of demultiplexing module (91), the output termination reconstruction video subject table module (95) of described inverse discrete cosine transform module (935).
- [claim 5] multifunctional portable electronic vision aid according to claim 1, it is characterized in that described control unit (1) comprises continuous system flow automatic control module (1-1), controller module (1-2), be connected with plurality of keys (1-3) on the controller module (1-2), system flow automatic control module (1-1) links to each other with described image-display units (7).
- [claim 6] multifunctional portable electronic vision aid according to claim 1, it is characterized in that described image acquisition units (3) adopts camera, comprise camera lens module (31), digital image acquisition module (32), A/D modular converter (33), camera lens module (31) connects digital image acquisition module (32), digital image acquisition module (32) connects A/D modular converter (33), and the output of A/D modular converter (33) connects described graphics processing unit (4), memory cell (2).
- [claim 7] multifunctional portable electronic vision aid according to claim 1, it is characterized in that described graphics processing unit (4) comprises the automatic exposure control module (41) that links to each other successively, automatic gain control module (42), Automatic white balance control module (43), auto brightness control module (44), color saturation control module (45), tone control module (46), acutance control module (47), gamma correction control module (48), automatic exposure control module (41) and described image acquisition units (3), memory cell (2) links to each other, and gamma correction control module (48) links to each other with described word recognition unit (5).
- [claim 8] multifunctional portable electronic vision aid according to claim 1 is characterized in that described intelligent decision unit (6) comprises that successively the standard words library module (61), the context intelligent decision that link to each other search module (62), statistics discrimination module (63), judged result output module (64).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016086438A1 (en) * | 2014-12-04 | 2016-06-09 | 上海交通大学 | Head-mounted multimedia terminal auxiliary viewing system for visually impaired person |
| CN105722268A (en) * | 2016-01-19 | 2016-06-29 | 杭州瑞杰珑科技有限公司 | Brightness self-adaption typoscope |
| WO2016182514A1 (en) * | 2015-05-12 | 2016-11-17 | Agency For Science, Technology And Research | A system and method for displaying a video image |
| CN111371960A (en) * | 2020-02-25 | 2020-07-03 | 华南理工大学 | Intelligent electronic reading frame assisting in reading books |
-
2008
- 2008-12-30 CN CNA2008103066560A patent/CN101478630A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016086438A1 (en) * | 2014-12-04 | 2016-06-09 | 上海交通大学 | Head-mounted multimedia terminal auxiliary viewing system for visually impaired person |
| WO2016182514A1 (en) * | 2015-05-12 | 2016-11-17 | Agency For Science, Technology And Research | A system and method for displaying a video image |
| CN105722268A (en) * | 2016-01-19 | 2016-06-29 | 杭州瑞杰珑科技有限公司 | Brightness self-adaption typoscope |
| CN111371960A (en) * | 2020-02-25 | 2020-07-03 | 华南理工大学 | Intelligent electronic reading frame assisting in reading books |
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