CN1133922C - Photographic electronic dictionary - Google Patents
Photographic electronic dictionary Download PDFInfo
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- CN1133922C CN1133922C CNB991161661A CN99116166A CN1133922C CN 1133922 C CN1133922 C CN 1133922C CN B991161661 A CNB991161661 A CN B991161661A CN 99116166 A CN99116166 A CN 99116166A CN 1133922 C CN1133922 C CN 1133922C
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Abstract
The present invention relates to an electronic dictionary, which is formed by the combination of element circuits, such as a CPU chip, an LCD module, a keyboard control module, an image DMA module, a data RAM, etc. The present invention is characterized in that an image sensor and a miniature close-up lens are used to form an integrated structure; a camera window covers characters and images which wait for being input, the characters and the images are taken, the present invention recognizes and explains software, and then, the present invention translates the characters into other selected characters to display on an LCD display screen. The present invention has the advantages of small size, simple structure, low cost, and lesser power loss.
Description
The present invention relates to a kind of electronic dictionary.
Electronic dictionary has dictionary function, account function, data check function, game function and communication function.The input method of the electronic dictionary word of prior art, the method that adopts hardware keyboards to import mostly, this method input speed is slow.If the user needs to look into certain word in reading process, for example: during the translator of Chinese of English word, need at first remember whole letters of this word, import electronic dictionary with keyboard one by one then, very time-consuming and tiring, the particularly oversize difficult memory of new word, sometimes even will repeat to see several all over could having beaten a word, the thinking that the user is read is upset or is disturbed.Phonetic entry is the method for another kind of input word, but this method that is that all right is ripe, be subject to environmental background noise and disturb.Dialect, intonation, word speed, vocabulary all have a strong impact on the accurate and speed of identification, can't use in the electronic dictionary product at present.CCD scanning input pickup has been used as the instrument of literal on the scanning input paper, this method is more convenient, simple and direct than keyboard and input method, but, this method has shortcoming, need free-hand dilatory scanning of user, the user can't judge the starting point and the terminal point of scanning exactly, and free-hand scanning is not easy again to take the air line, thereby visual winding the turning round that scanning is obtained, the identification accuracy of influence input word.Another problem of CCD scanning input pickup is that device needs to use higher voltage from principle, for example 8 volts, working current reaches tens milliamperes, power attenuation is bigger, so use the electronic dictionary of ccd sensor generally to have only single dictionary function, it is not suitable for and traditional, the frequent electronic dictionary coexistence of using.So scanning dictionary in the market only provides the scanning input characters, translate so unique function then.Another problem of CCD scanning input pickup is to use a position transducer to measure the distance and the speed of scanning input.This has increased the complete machine complexity, has increased production cost, and more difficult realization is microminiaturized.
The objective of the invention is to provide a kind of above-mentioned the deficiencies in the prior art that overcome, and then solve orientation problem and image stabilization problem, improve reliability and applicability, complete machine structure is simple, the photographic electronic dictionary that cost is low.
The objective of the invention is to be achieved through the following technical solutions: the present invention is a kind of use image sensor, read character and picture, carry out software identification and explanation, then this literal is translated into other selected literal and be presented on the LCD screen, its bag is by cpu chip, the LCD module, the Keyboard Control module, the image dma module, element circuits such as data RAM combine, it is characterized in that using CMOS image sensor and miniature close-up lens, constitute incorporate structure, the camera window mouth mask character and picture to be imported, absorb this literal image, carry out software identification and explanation, then character translation is become other selected literal to be presented on the LCD LCD screen.
The analog picture signal Vin of the CMOS image sensor output among the present invention is by the binaryzation of hardware binarization circuit realization picture intelligence, and described binarization circuit is made of a voltage comparator and an integrator; The Vin signal is through R
2C
2The passive filter of forming, send the in-phase input end of voltage comparator after the pulse of filtering high frequency interference, pass through integrator, extract the average weight of Vin picture intelligence, be connected to the inverting input of comparer then, when visual Vin comparer output high level during, when picture intelligence Vin comparer output low level during less than average weight greater than average weight.On the same surface of shooting window an infraluminescence receiving unit is housed, when the camera window mouth mask paper, or near paper, the infrared light that the infraluminescence components and parts send reflexes to receptacle by paper, thereby produce the saltus step of output signal, this signal enabling illumination light-emitting element illuminates whole shooting window; Otherwise when the shooting window leaves paper, receptacle produces opposite saltus step, and control illumination light-emitting element is closed.16 80C51XA-G3 single-chip microcomputers that are connected with CMOS image sensor output synchronizing signal, its control signal connects the DAM time schedule controller, realized being the high speed DMA processing of core with the single-chip microcomputer, the serialization graph image signal is transformed into 8 bit parallel picture signals and deposits RAM in, and described single-chip microcomputer host address bus, host data bus connect visual RAM.And low eight of described single-chip microcomputer host bus is connected with keyswitch by latch, and the other end link address bus of keyswitch adopts software realization cursor keyboard.
Bus driver connects a switching mode touch-screen among the present invention, switching mode touch screen data interface circuit uses a tri-state bus driver circuit, bus driver output connects the data bus of electronic dictionary circuit, and the width of data bus can be 16 or 8 modes; Pull-up resistor of each input termination of bus driver is parallel to the vertical electrode of switching mode touch-screen simultaneously one by one to the Vcc positive source; And the address bus of electronic dictionary circuit is received on the horizontal electrode of switching mode touch-screen, if address bus is 16, data bus also is 16, and then the total number of switches of switching mode touch-screen is the 16*16 position, also be 256, by changing the level of address bus line by line.E
1Be the effective control port of low level active data, at E
1Choose the keyboard data on switching mode touch-screen and the readout data bus during low level.
The 80C51XA-G3 single-chip microcomputer connects 24MHZ and 3.2MHZ quartz crystal respectively by high-speed analog switch among the present invention, and the operating voltage of described 80C51XA-G3 single-chip microcomputer and LCD is by MOS on-off circuit switched voltage lifting circuit.
The present invention videotapes electronics dictionary near after waiting to take the photograph paper as the user, and press the button that begins to make a video recording, promptly enter the software for discerning characters module, this literal identification software module reads the pictorial data of visual RAM earlier by DMA, carry out level and smooth to data then and the denoising processing, and carry out English character and discern, after English character identification obtains the result, this result is the approaching English character string of several features, further retrieve and treatment for correcting by dictionary, and really know unique English word recognition result, perform the preparation of sending LCD to show the result simultaneously.When needs are imported some words by the cursor keyboard, program enters the cursor key disk module, cursor is in the lower right corner, and the key position in the lower right corner demonstration of cracking down upon evil forces, the user comes moving cursor by the upper and lower, left and right key of shooting dictionary, the demonstration of cracking down upon evil forces of the cursor keyboard of cursor place of arrival, when the user pressed " affirmation " key, current cursor keyboard was confirmed to be letter of input.
The present invention compared with prior art, it is littler to have a volume, structure is more simplified, cost is lower, the characteristics that power attenuation is littler.
Description of drawings of the present invention is as follows:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is hardware binarization circuit figure of the present invention.
Fig. 3 is that infraluminescence of the present invention is accepted the assembly synoptic diagram.
Fig. 4 is the present invention's image dma circuit figure.
Fig. 5 is the flow chart of character and picture identification software of the present invention.
Fig. 6 is keyboard control circuit figure of the present invention.
Fig. 7 is a cursor key disc program block diagram of the present invention.
Fig. 8 is a cursor keyboard synoptic diagram of the present invention.
Fig. 9 is switching mode touch screen data interface circuit figure of the present invention.
Figure 10 is doubleclocking dual power supply management circuit figure of the present invention.
The present invention is described in further detail below in conjunction with Figure of description: as shown in Figure 1, the present invention adopts the CMOS image sensor to come the input characters image, it is characterized in that dress CMOS image sensor and miniature close-up lens 1 in the electronic dictionary constitute integral structure.Camera lens 2 is aimed at shooting window 3, covering character and picture to be imported by shooting window 3, electronic dictionary 4 can be under the situation of not doing any displacement, the character and picture that picked-up is like clockwork being covered, carry out software identification and explanation then, at last character translation is become other selected literal to be presented on the LCD screen 5, can regulate by operation push-button 6.Clearly, the invention solves orientation problem, solved the stability problem that reads image.Again because CMOS image sensor operating voltage is low, for example 3.6 volts or 2.7 volts, electric current so power attenuation descends tens of times than ccd sensor, can be used as a kind of expanded function and other various function coexistences of electronic dictionary of traditional electronic dictionary about 1mA.Again because the CMOS image sensor is the face battle array, needn't the use location sensor, simplified complete machine mechanism, reduced production cost, easier realizations microminiaturization.The size 84*45*20 of exemplary embodiments of the present invention is almost little one times than traditional C CD infrastructure product.Common people think that full the CCD scan mode can import longer word, and the scanning area of its typical products is high 6mm, and sweep length is 400mm.The size of the camera window of exemplary embodiments of the present invention is high 8mm, long 40mm.The length direction of comparing with the CCD scanning area is little a lot.But be not difficult to find, any literal of the high 6mm--4mm of word, English word for example, its length can not surpass 30mm--40mm.Input range is actual effective scope so the present invention makes a video recording, and also, for the word input of the high 4mm-6mm of word, length range 30mm-40mm is enough.And this size Selection makes the microminiaturization that videotapes electronic dictionary that assurance arranged.Adopt homemade M10 low cost CMOS camera chip, compare, have that cost is low, power consumption is little, operating voltage is low and characteristics such as easy and ordinary CMOS coupling with ccd image sensor.The outstanding advantage of it another is greatly to have simplified physical construction, thereby has reduced the cost of complete machine.But M10 also has shortcoming, as poor definition, and the problem that automatic gain, automatic exposure circuit can't directly use.M10 operating voltage 4.5V, electric current 2mA has composite video output, frame, line synchronizing signal and clock signal output.Close-up lens has selectivity to 0.5 low-light, and geometric distortion is less than 0.2%, focal length 400mm, and visual field 45 * 45, depth of field mm can satisfy the requirement of electro-photographic.Camera illumination employing wavelength is 0.5 micron a red LED, and light source is made up of the LED of 10 even linear distributions of high brightness.Working current is 15mA, and voltage is 4.5V, and efficient height, volume are little.
Contain the various components of actual image signal by the analog picture signal of CMOS image sensor picked-up, for example, the component of signal of reflection character and picture, the component of signal of reflection paper background, and reflect the component of signal that a width of cloth space of a whole page light and shade changes.From then on parsing the two-value signal that only reflects literal and paper background in the simulating signal (Vin) is a very difficult job.At present, binary conversion treatment often adopts software approach to realize, is the requirement of assurance speed and degree of accuracy, and is very high to the microprocessor MPU rate request, even needs to adopt the support of DSP hardware.This can cause hardware cost and power consumption to increase, and the complexity of software is increased, and travelling speed reduces.The present invention's employing hardware binarization circuit is as shown in Figure 2 realized the binaryzation of picture intelligence.This binarization circuit is made of a voltage comparator 7 and an integrator 8; The Vin signal is through R
2C
2The passive filter of forming, send the in-phase input end of comparer 7 after the pulse of filtering high frequency interference, the Vin signal is by integrator 8, extract the average weight of picture intelligence, be connected to the reverse input end of comparer 7 then, so, when visual Vin comparer output high level during greater than average weight, when picture intelligence Vin comparer output low level during less than average weight, because the average weight of picture intelligence is represented the change of background amount of an images space of a whole page, so the output of comparer 7 has reflected the variation on the background, also promptly reflected the Word message in the picture intelligence.This method has improved reliability and adaptability to disturbing the light influence insensitive, and production cost is very low, thereby has improved speed owing to simplified software again.
The present invention has also designed a kind of automatic lighting circuit, as shown in Figure 3.On the same plane of shooting window, an infraluminescence receiving unit 12 is housed, when the camera window mouth mask paper 13, or near paper 13,1-2 millimeter for example, the infrared light that infraluminescence components and parts 11 send reflexes to receptacle 12 by paper 13, thereby produce the saltus step of output signal, the illumination light-emitting element in this signal enabling electronic dictionary illuminates whole shooting window; Otherwise when the shooting window leaves paper 13, receptacle 12 produces opposite saltus step, and electronic dictionary circuit control illumination light-emitting element is closed, and this has just controlled illumination automatically.Because only when needs absorb image, just light the shooting window, thus relatively power saving, and illumination control is automatic, easy to operate.
As shown in Figure 4, the 80C51XA-G3 single-chip microcomputer that the present invention adopts PHILIPS to produce, this single-chip microcomputer is 16 single-chip microcomputers, reaches 30MHZ at a high speed, but low-voltage, low-power consumption 2.7V work.Its combination property is equivalent to 386EX, is one of chip that performance is the highest in present 16 single-chip microcomputers.The XAG3 single-chip microcomputer also has many good qualities.As real-time multitask, addressing capability is strong, abundant instruction set etc.Can satisfy the requirement of this product preferably.Image post processing circuitry frequency of operation height requires low-power consumption.Through repetition test, realized being the high speed DMA processing of core with the single-chip microcomputer with circuit shown in Figure 4, successfully the serialization graph image signal is transformed into 8 bit parallel picture signals and deposits RAM in.In the traditional images treatment product, often adopt DSP high speed signal treatment circuit or RASIC chip, the frequency of operation height, power consumption is big, and the cost height can't adopt in this project.The asynchronous DMA hardware circuit of our design can be controlled the dma circuit of 17.3M clock frequency with the single-chip microcomputer of 3.2M clock, and the high speed image signal is written into.The post processing of image circuit has been designed to two semi-custom asic chips at present, and the medium scale integration (MSI) in original 20 74 series is integrated in 1 CPLD chip.
As shown in Figure 5, program description when the user videotapes electronics dictionary near after waiting to take the photograph paper, and is pressed the button that begins to make a video recording, and promptly enters the software for discerning characters module.This software reads the pictorial data of visual RAM earlier by DMA, carry out level and smooth to data then and the denoising processing, and carry out English character identification (OCR identification), and this identifying is the process of a complexity and many prior art supports are arranged.After English character identification obtained the result, this result was the approaching English character string of several features, and the present invention will further retrieve and treatment for correcting by dictionary, and really knows unique English word recognition result.Perform the preparation of sending LCD to show the result simultaneously.As Fig. 6, Fig. 7, shown in Figure 8, in order to reduce the volume of apparatus of the present invention, hardware keyboards neither installed in electronic dictionary of the present invention, touch-screen is not installed again, the cursor keyboard that adopts software to realize is characterized in that: the key position of moving the some optional positions in the keyboard that makes screen display by cursor instead shows, when the user presses acknowledgement key, the then current anti-key position that shows is confirmed to be presses, thereby has realized software cursor keyboard substituting hardware keyboards.Owing to adopt above-mentioned cursor key disk technology.On the embodiment of the invention only needs, down, a left side, the right side is confirmed, removes, and begins shooting, power supply, totally 8 function keys just can guarantee the input of English and Chinese character.
As shown in Figure 9, extend as a technology of the present invention, also can adopt the switching mode touch-screen, traditional switching mode touch-screen need take a lot of I/O ports of MPU, for example 16*16 bit switch type touch-screen needs 32 I/O ports, increases by 32 I/O ports so generally need to increase by 48 expansion I/O chips.The present invention adopts switching mode touch screen data interface circuit as shown in Figure 9.This circuit only uses a tri-state bus driver circuit 10, only takies a hardware address space; In the circuit, bus driver 10 outputs connect the data bus (DADA BUS) of electronic dictionary circuit, and the width of data bus can be 16 or 8 modes; Pull-up resistor of each input termination of bus driver 10 is parallel to the vertical electrode of switching mode touch-screen 9 simultaneously one by one to the Vcc positive source; And the address bus of electronic dictionary circuit is received on the horizontal electrode of switching mode touch-screen, if address bus is 16, data bus also is 16, then the total number of switches of switching mode touch-screen 9 is the 16*16 position, also is 256.By changing the level of address bus, E line by line
1Be the effective control port of low level active data, at E
1Choose the keyboard data on switching mode touch-screen and the readout data bus during low level, so these data can be distinguished in 256 keys the state that any one or any several key are pressed.Because the data line of switch touch-screen 9 of the present invention and MPU data bus, address bus are shared, do not take other any I/O port of MPU, have simplified hardware configuration greatly, have reduced production cost.
Because the character and picture identification software is very complicated, need high speed MPU to move with maximum clock frequency, 24MHZ for example, even higher, and the design is when being used for the ordinary electronic dictionary mode, the software complexity is low, should reduce the MPU frequency so that reduce power consumption.The MPU power consumption is directly proportional with its frequency of operation, if frequency drops to 3.2MHZ with 24MHZ, power consumption will descend 7.5 times, (for example 24M) during high-frequency work on the other hand, the MPU microprocessor must adopt high voltage (for example 3.6 volts), and during low frequency operation (for example 3.2MHZ), after the operating voltage of MPU can drop to 2.7 volts, power consumption can descend 1.37 times, the present invention adopts two kinds of different frequency of operation as shown in figure 10, two kinds of different operating voltage, when software work during in the identification of the character and picture of complexity, the operating voltage of hardware circuit rises, for example 3.6 volts, the corresponding rising of frequency of operation simultaneously, 24MHZ for example is when software work during at the conditional electronic dictionary mode, the operating voltage of hardware circuit descends, for example 2.7 volts, frequency of operation descends, for example 3.2MHZ.This design reduces much power consumption.
Cmos sensor and miniature close-up lens add with electronic dictionary in the present invention system, and integrated structure design, overall dimensions have only 84*45*20 (mm).Videotape window 6*35mm, this volume that videotapes electronic dictionary has only the CCD pen that can see in the market to scan about 1/2 of dictionary.Owing to adopt hardware binarization circuit of the present invention, no hardware keyboards design is simplified hardware, owing to adopt two kinds of different frequencies, two kinds of different voltages make the average power consumption of implementing model machine below 300 milliwatts.
The present invention adopts no hardware keyboards, additional cmos sensor of switching mode touch-screen and electronic dictionary and miniature close-up lens integrated structure design.Owing to adopt switching mode touch screen data interface circuit of the present invention, reduced the hardware circuit chip, thereby hardware cost is descended, volume is reduced.
In sum, as the electronic dictionary of word input, it is littler that the present invention has a volume, Structure is more simplified, and cost is lower, the characteristics that power attenuation is littler. The in-built CMOS of electronic dictionary Image sensor and close-up lens, being integrally formed structure, the camera window mouth mask to be entered Character and picture in the static situation, absorbs the character and picture signal, thereby has guaranteed the standard of data Really.
Claims (7)
1 one kinds of photographic electronic dictionaries, use imageing sensor, read character image, carry out software identification and explanation, then this literal is translated into other selected literal and be presented on the LCD screen, it comprises cpu chip, the LCD module, the Keyboard Control module, the image dma module, element circuits such as data RAM combine, it is characterized in that using cmos image sensor and miniature close-up lens, constitute incorporate structure, the character image that camera window mouth mask person is to be imported, absorb this character image, carry out software identification and explanation, then character translation is become other selected literal to be presented on the LCD LCD screen; The simulating signal Vin of cmos image sensor output is by the binaryzation of hardware binarization circuit realization picture signal, and described binarization circuit is made of a voltage comparator and an integrator, and the Vin signal is through R
2C
2The passive filter of forming, filter the in-phase input end that send voltage comparator after the high frequency interference pulse, pass through integrator, extract the average weight of Vin picture signal, be connected to the inverting input of comparer then, when picture signal Vin comparer output high level during, when picture signal Vin comparer output low level during less than average weight greater than average weight.
2 photographic electronic dictionaries according to claim 1, it is characterized in that making a video recording and an infraluminescence receiving unit is housed on the same surface of window, when the camera window mouth mask paper, or near paper, the infrared light that the infraluminescence components and parts send reflexes to receiver by paper, thereby produce the saltus step of output signal, this signal enabling illumination light-emitting element illuminates whole shooting window, otherwise, when the shooting window leaves paper, receiver produces opposite saltus step, and control illumination light-emitting element is closed.
3 photographic electronic dictionaries according to claim 1, it is characterized in that exporting 16 80C51XA-G3 single-chip microcomputers that synchronizing signal is connected with cmos image sensor, its control signal connects the DAM time schedule controller, realized being the high speed DMA processing of core with the single-chip microcomputer, the serialization graph image signal is transformed into 8 bit parallel picture signals and deposits RAM in, and described single-chip microcomputer host address bus, host data bus connection layout are as RAM.
4 photographic electronic dictionaries according to claim 1 is characterized in that low eight of described single-chip microcomputer host bus is connected with keyswitch by latch, and the other end link address bus of keyswitch adopts software realization cursor keyboard.
5 photographic electronic dictionaries according to claim 1, it is characterized in that bus driver connects a switching mode touch-screen, switching mode touch screen data interface circuit uses a tri-state bus driver circuit, bus driver output connects the data bus of electronic dictionary circuit, the width of data bus can be 16 or 8 modes, pull-up resistor of each input termination of bus driver is parallel to the vertical electrode of switching mode touch-screen simultaneously one by one to the Vcc positive source; And the address bus of resistance dictionary is received on the horizontal electrode of switching mode touch-screen, if address bus is 16, then the bus switches of switching mode touch-screen is 16 * 16, promptly 256, and by changing the level of address bus line by line, E
1Choose the keyboard data on switching mode touch-screen and the readout data bus during low level.
6 according to claim 1 or 3 described photographic electronic dictionaries, it is characterized in that the 80C51XA-G3 single-chip microcomputer connects 24MKZ and 3.2MKZ quartz crystal respectively by high-speed analog switch, the operating voltage of described 80C51XA-G3 single-chip microcomputer and LCD is by MOS on-off circuit switched voltage lifting circuit.
7 photographic electronic dictionaries according to claim 4, it is characterized in that when needs are imported some words by the cursor keyboard, program enters the cursor key disk module, cursor is in the lower right corner, and the demonstration of cracking down upon evil forces of the key position in the lower right corner, the user comes moving cursor by the upper and lower, left and right key of shooting dictionary, the demonstration of cracking down upon evil forces of the cursor keyboard of cursor place of arrival, when the user pressed " affirmation " key, current cursor keyboard was confirmed to be letter of input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991161661A CN1133922C (en) | 1999-05-05 | 1999-05-05 | Photographic electronic dictionary |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991161661A CN1133922C (en) | 1999-05-05 | 1999-05-05 | Photographic electronic dictionary |
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|---|---|
| CN1273387A CN1273387A (en) | 2000-11-15 |
| CN1133922C true CN1133922C (en) | 2004-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991161661A Expired - Fee Related CN1133922C (en) | 1999-05-05 | 1999-05-05 | Photographic electronic dictionary |
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| CN (1) | CN1133922C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60327736D1 (en) * | 2002-12-26 | 2009-07-09 | Canon Kk | Image processing apparatus and image processing method |
| CN102081646B (en) * | 2009-11-30 | 2014-02-26 | 卡西欧计算机株式会社 | Electronic dictionary apparatus and search method therefor |
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1999
- 1999-05-05 CN CNB991161661A patent/CN1133922C/en not_active Expired - Fee Related
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| CN1273387A (en) | 2000-11-15 |
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