CN104243817A - Dimming method for camera shooting device - Google Patents
Dimming method for camera shooting device Download PDFInfo
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- CN104243817A CN104243817A CN201410428779.7A CN201410428779A CN104243817A CN 104243817 A CN104243817 A CN 104243817A CN 201410428779 A CN201410428779 A CN 201410428779A CN 104243817 A CN104243817 A CN 104243817A
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Abstract
The invention provides a dimming method for a camera shooting device. The method comprises the steps that DA converters are used for converting analog electrical signals output by a first light sensing element and a second light sensing element into digital signals; an image processing module receives image signals output by a first camera and a second camera, and the image signals are converted into digital signals; a dimming module is used for receiving the digital signals output by the first DA converter and the second DA converter, and dimming signals are output according to a prestored data table; the first dimming signals are coupled to an image synthesis module, and synthesis operation is conducted on the first dimming signals and the image signals, output by the image processing module, of the first camera; the second dimming signals are coupled to a second power conversion circuit, and the current value which is output to a second LED by the second power conversion circuit is controlled; the image synthesis module is used for conducting synthesis module on the image signals, output by the image processing module, of the first camera and the first dimming signals, and the image signals of the second camera are directly output.
Description
Technical field
The present invention relates to electronic technology field, refer to a kind of control method of camera especially.
Background technology
Since First camera is in the world born, being just doomed camera will change life and the history of the mankind.Camera is called for short camera, is that a kind of optical imaging concept that utilizes forms image and uses the equipment of negative writing image.
The light that subject reflects, after being focused on by photographic film and the shutter controlling exposure, the photosensitive material of subject in camera bellows forms sub-image, through rinsing the permanent image of process formation.Camera architecture is the earliest very simple, only comprises camera bellows, camera lens and photosensitive material.Modern camera more complicated, there is camera lens, aperture, shutter, find range, find a view, light-metering, film trasport, counting, auto heterodyne, focusing, the system such as zoom, modern camera is a kind of complex product in conjunction with technology such as optics, precision optical machinery, electronic technology and chemistry.
Digital camera is that a kind of electronic sensor that utilizes converts the camera of electronic data to optical image.Different from the principle that ordinary camera carrys out document image by the chemical change of silver bromide on film, the transducer of digital camera is a kind of Charged Couple (CCD) or complementary metal oxide semiconductors (CMOS) (CMOS) of photoinduction formula.Before image transmitting to computer, usually can first be stored in digital storage equipment.
Mobile phone and camera are born combinations, and along with the development of software and hardware, the shooting effect of mobile phone camera, more and more close to mm professional camera special, the especially Self-timer of mobile phone camera, mm professional camera special is incomparable especially.The moment of the light-dimming method of filming apparatus, the main experience by user oneself operates, and due to shooting angle and the restriction of taking posture, causes the operation such as focusing, light filling of auto heterodyne moment photo to optimize.
Summary of the invention
The present invention proposes a kind of light-dimming method of filming apparatus, solves in prior art because the restriction of shooting angle and posture, photo operate the problem that cannot optimize to light filling.
Technical scheme of the present invention is achieved in that
A kind of light-dimming method of filming apparatus, based on the first taking module and the second taking module, described first taking module comprises the first camera being arranged on mobile phone front and the first photo-sensitive cell being arranged on the mobile phone back side, and described second taking module comprises the second camera, the 2nd LED that are arranged on the mobile phone back side and is arranged on second photo-sensitive cell in mobile phone front; Described first photo-sensitive cell, the first camera with the use of, described second photo-sensitive cell, second camera and the 2nd LED with the use of; Comprise the following steps:
Step (a), is converted to digital signal by the first D/A converter by the analog electrical signal that the first photo-sensitive cell exports; By the second D/A converter, the analog electrical signal that the second photo-sensitive cell exports is converted to digital signal;
Step (b), is received the picture signal of described first camera and second camera output, is converted into digital signal by image processing module;
Step (c), is received the digital signal of described first D/A converter and the output of the second D/A converter, exports dim signal according to the tables of data prestored by light-adjusting module;
Step (d), is couple to image synthesis unit by the first dim signal, and the picture signal of the first camera exported with described image processing module carries out synthetic operation;
Step (e), is couple to the second power transformation circuit by the second dim signal, controls the current value that the second power transformation circuit outputs to the 2nd LED;
Step (f), described image synthesis unit carries out synthetic operation to the picture signal of the first camera that image processing module exports and the first dim signal, directly exports the picture signal of second camera.
Alternatively, in described step (e), the step that the second power transformation circuit carries out power converter specifically comprises:
First, the conversion of electric pressure is carried out by transformer, described transformer comprises former limit winding and vice-side winding, former limit winding comprises first end and the second end, vice-side winding comprises first end and the second end, former limit winding first end is connected to battery, and vice-side winding second end is connected to secondary earth potential, and former limit winding first end and vice-side winding second end are Same Name of Ends;
Then, carry out copped wave process by the first switching tube to input voltage, the source electrode of the first switching tube is connected to transformer primary side winding second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
Next, modulated by the conducting duty ratio of the first switch driver to described first switching tube, first switch driver comprises the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, control end receives described first dim signal, the emitter of the first transistor and transistor seconds links together as output, the collector electrode of the first transistor is connected to battery, and the collector electrode of transistor seconds is connected to former limit earth potential.
The invention has the beneficial effects as follows:
By be arranged on the photo-sensitive cell of other side and camera, LED with the use of, the photo-sensitive cell control LED arranged by opposite side carries out light filling operation to reference object, and the color and luster of photographic images is optimized.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the theory diagram of the light-dimming method of filming apparatus of the present invention;
Fig. 2 is the flow chart of the light-dimming method of filming apparatus of the present invention;
Fig. 3 is the circuit diagram of the second power transformation circuit of the light-dimming method of filming apparatus of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the light-dimming method of a kind of filming apparatus of the present invention, it organizes principle altogether: be arranged on the first taking module 10 and the second taking module 20, described first taking module comprises the first camera 11 being arranged on mobile phone front and the first photo-sensitive cell 12 being arranged on the mobile phone back side, and described second taking module 20 comprises the second camera 21, the 2nd LED23 that are arranged on the mobile phone back side and is arranged on second photo-sensitive cell 22 in mobile phone front; Described first photo-sensitive cell 12, first camera 11 with the use of, described second photo-sensitive cell 22, second camera 21 and the 2nd LED23 with the use of.
First D/A converter 31, be connected to described first photo-sensitive cell 12, the analog electrical signal exported is converted to digital signal; Second D/A converter 32, be connected to described second photo-sensitive cell 22, the analog electrical signal exported is converted to digital signal.
Image processing module 41, receives the picture signal of described first camera 11 and second camera 21 output, is converted into digital signal; Light-adjusting module 42, receives the digital signal of described first D/A converter 31 and the output of the second D/A converter 32, exports dim signal according to the tables of data prestored.
First dim signal is couple to image synthesis unit 43, and the picture signal of the first camera exported with described image processing module 41 carries out synthetic operation; When the first photo-sensitive cell 12, to respond to light on the weak side, and light-adjusting module 42 exports digital dimming signal, carries out software light modulation by image synthesis unit 43.
Second dim signal is couple to the second power transformation circuit 60, controls the current value that the second power transformation circuit outputs to the 2nd LED; When the second photo-sensitive cell 22, to respond to light on the weak side, and light-adjusting module 42 exports simulation dim signal to the second power transformation circuit, controls the electric current that the 2nd LED flows through, carries out hardware light modulation to second camera.
Based on the above-mentioned description to operation principle of the present invention, as shown in Figure 2, the light-dimming method of filming apparatus of the present invention, comprises the following steps:
Step (a), is converted to digital signal by the first D/A converter by the analog electrical signal that the first photo-sensitive cell exports; By the second D/A converter, the analog electrical signal that the second photo-sensitive cell exports is converted to digital signal;
Step (b), is received the picture signal of described first camera and second camera output, is converted into digital signal by image processing module;
Step (c), is received the digital signal of described first D/A converter and the output of the second D/A converter, exports dim signal according to the tables of data prestored by light-adjusting module;
Step (d), is couple to image synthesis unit by the first dim signal, and the picture signal of the first camera exported with described image processing module carries out synthetic operation;
Step (e), is couple to the second power transformation circuit by the second dim signal, controls the current value that the second power transformation circuit outputs to the 2nd LED;
Step (f), described image synthesis unit carries out synthetic operation to the picture signal of the first camera that image processing module exports and the first dim signal, directly exports the picture signal of second camera.
As shown in Figure 3, second power transformation circuit 60 comprises: transformer 51, comprise former limit winding and vice-side winding, former limit winding comprises first end and the second end, vice-side winding comprises first end and the second end, former limit winding first end is connected to storage battery as input, and vice-side winding second end is connected to secondary earth potential, and former limit winding first end and vice-side winding second end are Same Name of Ends; First switching tube 52, its source electrode is connected to transformer primary side winding second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver 53; First switch driver 53, comprise the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, the emitter of the first transistor and transistor seconds links together as output, and the collector electrode of the first transistor is connected to power supply, and the collector electrode of transistor seconds is connected to former limit earth potential; First diode 54, its anode is connected to transformer secondary winding first end, and its negative electrode is connected to the first inductor 55; The common port of the first inductor 55 and the first capacitor 56 is as output, and the other end of the first capacitor 56 is connected to secondary earth potential.
Described light-adjusting module 42 exports the control end of the second dim signal to the first switch driver 53, the turn-on and turn-off of control switch pipe, and then controls the electric current outputting to the 2nd LED23.
The picture signal of the first camera that described image synthesis unit 43 pairs of image processing modules 41 export and the first dim signal carry out synthetic operation, directly export the picture signal of second camera.
Based on the above-mentioned description to the second power transformation circuit, in described step (e), the step that the second power transformation circuit carries out power converter specifically comprises:
First, the conversion of electric pressure is carried out by transformer, described transformer comprises former limit winding and vice-side winding, former limit winding comprises first end and the second end, vice-side winding comprises first end and the second end, former limit winding first end is connected to battery, and vice-side winding second end is connected to secondary earth potential, and former limit winding first end and vice-side winding second end are Same Name of Ends;
Then, carry out copped wave process by the first switching tube to input voltage, the source electrode of the first switching tube is connected to transformer primary side winding second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
Next, modulated by the conducting duty ratio of the first switch driver to described first switching tube, first switch driver comprises the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, control end receives described first dim signal, the emitter of the first transistor and transistor seconds links together as output, the collector electrode of the first transistor is connected to battery, and the collector electrode of transistor seconds is connected to former limit earth potential.
Above-mentioned image processing module 41, light-adjusting module 42 and image synthesis unit 43 can adopt discrete structure to realize, and namely select 3 chip blocks, and pass through the function of the circuit realiration Images uniting taken outward; Image processing module 41, light-adjusting module 42 and image synthesis unit 43 also can adopt integrated structure to realize, and namely realize image processing module 41, light-adjusting module 42 and image synthesis unit 43 by the internal processes of DSP circuit.
Preferably, described dsp chip is TMS320DM642 chip.
TMS320DM642 is fixed DSP up-to-date in TI company C6000 series DSP, its core is C6416 type high-performance digital signal processor, there is extremely strong handling property, the flexibility of height and programmability, periphery is integrated with equipment and the interfaces such as very complete audio frequency, video and network service simultaneously.
TMS320DM642 chip comprises: 3 configurable video ports (VPORT0-2) can realize seamless link with general video coding and decoding device, support various video resolution and video standard, support RAW video input/output, transport stream mode; 1 10/100Mb/s Ethernet interface (EMAC), meets IEEE802.3 standard; 1 multichannel band buffered audio serial port (McASP), supports the audio format such as I2S, DIT, S/PDIF, IEC60958-1, AES-3, CP-430; 2 multichannel band Buffered Serial Port (McBSP), adopt RS232 level to drive; 1 VCXO interpolation control unit (VIC), supports that audio/video is synchronous; 1 32,66M hertz, the master/slave pci interface of 3.3V, follow PCI2.2 specification; 1 configurable 16/32 host interface (HPI) of user; 1 16 general input/output port (GPIO); 1 64 external memory interfaces (EMIF), can with most of asynchronous memory (SRAM, EPROM) and synchronous memories (SDRAM, SBSRAM, ZBT SRAM, FIFO) seamless link, maximum addressable external memory storage space is 1024MB; 1 enhancement mode direct memory access controller (EDMA) with 64 autonomous channels, tunnel; 1 data management input/output module (MDIO); 1 I2C bus module; 3 32 general purpose timers; 1 jtag interface and daughterboard interface etc. meeting IEEE1149.1 standard.
The present invention by be arranged on the photo-sensitive cell of other side and camera, LED with the use of, the photo-sensitive cell control LED arranged by opposite side carries out light filling operation to reference object, and the color and luster of photographic images is optimized.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. the light-dimming method of a filming apparatus, based on the first taking module and the second taking module, described first taking module comprises the first camera being arranged on mobile phone front and the first photo-sensitive cell being arranged on the mobile phone back side, and described second taking module comprises the second camera, the 2nd LED that are arranged on the mobile phone back side and is arranged on second photo-sensitive cell in mobile phone front; Described first photo-sensitive cell, the first camera with the use of, described second photo-sensitive cell, second camera and the 2nd LED with the use of; It is characterized in that, comprise the following steps:
Step (a), is converted to digital signal by the first D/A converter by the analog electrical signal that the first photo-sensitive cell exports; By the second D/A converter, the analog electrical signal that the second photo-sensitive cell exports is converted to digital signal;
Step (b), is received the picture signal of described first camera and second camera output, is converted into digital signal by image processing module;
Step (c), is received the digital signal of described first D/A converter and the output of the second D/A converter, exports dim signal according to the tables of data prestored by light-adjusting module;
Step (d), is couple to image synthesis unit by the first dim signal, and the picture signal of the first camera exported with described image processing module carries out synthetic operation;
Step (e), is couple to the second power transformation circuit by the second dim signal, controls the current value that the second power transformation circuit outputs to the 2nd LED;
Step (f), described image synthesis unit carries out synthetic operation to the picture signal of the first camera that image processing module exports and the first dim signal, directly exports the picture signal of second camera.
2. the light-dimming method of a kind of filming apparatus as claimed in claim 1, is characterized in that, in described step (e), the step that the second power transformation circuit carries out power converter specifically comprises:
First, the conversion of electric pressure is carried out by transformer, described transformer comprises former limit winding and vice-side winding, former limit winding comprises first end and the second end, vice-side winding comprises first end and the second end, former limit winding first end is connected to battery, and vice-side winding second end is connected to secondary earth potential, and former limit winding first end and vice-side winding second end are Same Name of Ends;
Then, carry out copped wave process by the first switching tube to input voltage, the source electrode of the first switching tube is connected to transformer primary side winding second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
Next, modulated by the conducting duty ratio of the first switch driver to described first switching tube, first switch driver comprises the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, control end receives described first dim signal, the emitter of the first transistor and transistor seconds links together as output, the collector electrode of the first transistor is connected to battery, and the collector electrode of transistor seconds is connected to former limit earth potential.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410428779.7A CN104243817A (en) | 2014-08-27 | 2014-08-27 | Dimming method for camera shooting device |
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| CN201410428779.7A CN104243817A (en) | 2014-08-27 | 2014-08-27 | Dimming method for camera shooting device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102014207A (en) * | 2010-11-30 | 2011-04-13 | 中兴通讯股份有限公司 | Communication terminal and visual telephone processing method |
| JP2011239084A (en) * | 2010-05-07 | 2011-11-24 | Olympus Imaging Corp | Imaging device and imaging method |
| CN103985087A (en) * | 2013-02-08 | 2014-08-13 | 北京银万特科技有限公司 | Mirror image display and information processing method based on intelligent information terminal |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011239084A (en) * | 2010-05-07 | 2011-11-24 | Olympus Imaging Corp | Imaging device and imaging method |
| CN102014207A (en) * | 2010-11-30 | 2011-04-13 | 中兴通讯股份有限公司 | Communication terminal and visual telephone processing method |
| CN103985087A (en) * | 2013-02-08 | 2014-08-13 | 北京银万特科技有限公司 | Mirror image display and information processing method based on intelligent information terminal |
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Application publication date: 20141224 |