CN101472077B - Digital photographic apparatus with luminance compensation and compensation process thereof - Google Patents
Digital photographic apparatus with luminance compensation and compensation process thereof Download PDFInfo
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- CN101472077B CN101472077B CN2007103063587A CN200710306358A CN101472077B CN 101472077 B CN101472077 B CN 101472077B CN 2007103063587 A CN2007103063587 A CN 2007103063587A CN 200710306358 A CN200710306358 A CN 200710306358A CN 101472077 B CN101472077 B CN 101472077B
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Abstract
The invention discloses a digital photography device with the brightness compensation function, and a compensation method thereof, which are applied to the brightness compensation during the shooting process of the digital photography device in different light sources to maintain the frame rate of the digital photography. The digital photography device comprises a light sensing unit, a light sensing component, a light source generator, a light dimming circuit, an arithmetic unit and a storage unit, wherein, the light sensing unit is used for sensing the brightness outside the digital photography device; the light dimming circuit is electrically connected with the light source generator; the light dimming circuit is used for controlling the illuminating brightness of the light source generator; the arithmetic unit is electrically connected with the light sensing unit and the light source generator; and the arithmetic unit executes a brightness correction method and a brightness compensation method, the brightness correction method is used for correcting the brightness sensing reference value of the light sensing unit, and the brightness compensation method is used for adjusting the brightness of the light source device according to the external brightness of the digital photography device.
Description
Technical field
The present invention relates to a kind of shooting parameter adjustment method of digital photographic device, particularly include digital photographic device and luminance compensation method thereof that the luminance compensation of taking about digital photographic device is used to keep the frame per second of digitized video in Different Light.
Background technology
Along with the development of digitized video, write down the picture that the user wants except utilizing digital camera, also can utilize digital photographic device to take dynamic film.The captured film of digital photographic device can be regarded as many picture and constitute.Under the situation that ambient brightness allows, generally speaking the shooting frame per second of digital photographic device is 1 second 30 frame image (frame).Certainly high more 120 frame per second representative has smooth more play quality.If the frame per second (frame rate) of taking is low excessively, can make the broadcast of film have the generation of jumping lattice.In other words, captured exactly film can produce the phenomenon of jumping lattice.
Please refer to shown in Figure 1ly, it is the schematic diagram of existing luminance regulating method.In order to keep certain shooting frame per second, so the digital photography chance is adjusted the yield value of its photosensory assembly in different brightness.Existing luminance regulating method may further comprise the steps: step S110, the brightness of detecting external environment condition.Step S120 selects compensation way, execution in step S131 or step S132.Step S131, the yield value of adjustment photosensory assembly.Step S132 adjusts and takes frame per second.Step S140 judges whether to reach the definition of digitized video, if reach, then finishes, otherwise changes step S120 over to.
What the yield value of photosensory assembly was used to adjust photosensory assembly is subjected to luminous energy power.But be subject to the characteristic electron of photosensory assembly, photosensory assembly can be because yield value be raised related noise (noise) quantity that allows and also increases.Or adjust the frame per second of taking, be used to increase the light-receiving time of photosensory assembly.But aforesaid film can appear in lower frame per second plays the problem generation of jumping lattice.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of digital photographic device and compensation method thereof with luminance compensation, is applied to the frame per second that luminance compensation that digital photographic device takes in Different Light is used to keep digitized video.
To achieve these goals, the invention provides a kind of digital photographic device with luminance compensation, be applied to the frame per second that luminance compensation that a digital photographic device takes is used to keep digitized video in Different Light, it is characterized in that this digital photographic device includes:
One photometry unit is used for the outside brightness of this digital photographic device of sensing;
One photosensory assembly is used to absorb the multiframe digitized video;
One light source generator is used to provide the illumination of this digital photographic device;
One light adjusting circuit is electrically connected at this light source generator, is used to control the brightness of illumination of this light source generator;
One memory cell is used to store luminance compensation means and gamma correction means; And
One arithmetic element, be electrically connected at this memory cell, this photometry unit and this light source generator respectively, be used to carry out these gamma correction means and this luminance compensation means, these gamma correction means are used to proofread and correct a brightness sensing fiducial value of this photometry unit, and these luminance compensation means are used to adjust the brightness of this light source generator.
Described digital photographic device with luminance compensation, wherein, these luminance compensation means are adjusted the brightness of this light supply apparatus according to a time for exposure of those digitized videos.
Described digital photographic device with luminance compensation, wherein, these luminance compensation means are adjusted the brightness of this light supply apparatus according to a yield value of this digital photographic device.
To achieve these goals, the present invention also provides a kind of compensation method of the luminance compensation to digital photographic device, is applied to the luminance compensation that a digital photographic device is taken in Different Light, it is characterized in that this compensation method comprises the following steps:
Set a luminance reference value of a digital photographic device;
According to the outside brightness of this luminance reference value and this digital photographic device, be used to determine the shooting one image frame per second of this digital photographic device; And
Adjust the luminosity of a light source generator, make the filmed image frame per second of this digital photographic device be higher than an image frame number threshold value.
The compensation method of described luminance compensation to digital photographic device, wherein, further comprising the steps of at the luminosity of adjusting this light source generator:
If the luminosity of this light source generator, make the filmed image frame per second of this digital photographic device less than this image frame number threshold value, then carry out one and adjust yield value.
The compensation method of described luminance compensation to digital photographic device wherein, may further comprise the steps after adjusting the luminosity of this light source generator: carry out white balance test, be used to judge the white balance of the input image of this digital photographic device.
The compensation method of described luminance compensation to digital photographic device wherein, to the brightness look-up table, is used to adjust the luminosity of this light source generator according to an image frame per second.
The compensation method of described luminance compensation to digital photographic device wherein, to brightness curve, is used to adjust the luminosity of this light source generator according to an image frame per second.
The compensation method of described luminance compensation to digital photographic device, wherein, after the luminosity step of adjusting this light source generator, further comprising the steps of:
According to the outside brightness of this digital photographic device and the luminosity of this light source generator, be used to determine whether to repeat this image frame per second of shooting of this digital photographic device of decision.
The invention provides a kind of digital photographic device and luminance compensation method thereof with luminance compensation.When digital photographic device is taken, be used for suitably adjusting the luminosity of the external light source of digital photography in Different Light.Make digital photographic device in different ambient brightnesss, can keep the frame per second of digitized video and can not reduce the quality of image.In addition, also can avoid adjusting yield value, reduce news because the raising image that yield value produced is made an uproar to photosensory assembly.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the schematic diagram of existing luminance regulating method;
Fig. 2 is a configuration diagram of the present invention;
Fig. 3 is an operation workflow schematic diagram of the present invention;
Fig. 4 adjusts curve for outside brightness to light source.
Wherein, Reference numeral:
200 digital photographic devices
210 photometry unit
220 photosensory assemblies
230 light source generators
240 light adjusting circuits
250 arithmetic elements
260 memory cell
261 gamma correction means
262 luminance compensation means
Embodiment
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is made further more detailed description.
Please refer to shown in Figure 2ly, it is a configuration diagram of the present invention.Have in the digital photographic device 200 of luminance compensation and include: photometry unit 210, photosensory assembly 220, light source generator 230, light adjusting circuit 240, arithmetic element 250 and memory cell 260.
Because 200 pairs of varying environment brightness have its demand for different digital photographic devices.With household digital video camera and introscope video camera is example.The employed scope of household digital video camera is indoor and outdoor mostly, and its captured ambient brightness is all comparatively bright.So the brightness sensing fiducial value of household digital video camera can be set lower brightness sensing fiducial value for.And the introscope video camera is used for taking human internal organ more, and its ambient brightness is almost nil.If directly compensate with external light source, photosensory assembly 220 is easily because factors such as light reflection cause photosensory assembly 220 to be subjected to the light interpretation incorrect.So, the introscope video camera just can't correctly be judged the image frame per second of current shooting.So the introscope video camera need be set higher brightness sensing fiducial value.
Luminance compensation means 262 are adjusted the brightness of this light supply apparatus according to the time for exposure of digitized video.With the image frame per second is that 30 (frames/sec) are example, and its time for exposure is 1/30 second for each frame image.So high more image frame per second, its image exposure time will be short more.Except the above-mentioned adjustment time for exposure, arithmetic element 250 also can be by adjusting the yield value of photosensory assembly 220, and what be used to adjust photosensory assembly 220 is subjected to luminous energy power.Make photosensory assembly 220 in low light source environment, also can keep certain image frame per second.Memory cell 260 is electrically connected at arithmetic element 250, and memory cell 260 is used to store gamma correction means 261 and luminance compensation means 262.
For clearly demonstrating operation workflow of the present invention, please refer to shown in Figure 3ly, it is an operation workflow schematic diagram of the present invention.Please refer to shown in the following step: step S310, the luminance reference value of setting digital photographic device 200, brightness sensing fiducial value is used to adjust the luminous sensitivity of photosensory assembly 220.Step S320 then, according to the outside brightness of luminance reference value and digital photographic device 200, is used to judge whether to adjust the filmed image frame per second of digital photographic device 200.Step S321 is if the image frame per second then reduces the image frame per second greater than an image frame number threshold value.In other words, elongate the time for exposure length of each image exactly, be used to increase the light income of photosensory assembly 220.Image frame number threshold value in the present embodiment exceeds with per second 30 frame images.
Step S330 is if the image frame per second is then carried out the compensation of light source generator 230 less than an image frame number threshold value.Adjust the luminosity of light source, make the filmed image frame per second of digital photographic device 200 be higher than image frame number threshold value.
Digital photographic device 200 according to the image frame per second to brightness look-up table or image frame per second to brightness curve, be used to adjust the luminosity of light source generator 230.Please be in addition with reference to shown in Figure 4, it adjusts curve for outside brightness to light source.Be the brightness representation unit in the present embodiment with illumination.Illumination refers to the density that is subjected to according to accepting luminous flux on the plane.The luminous flux of 1 luminosity is evenly distributed on 1 square centimeter of (m
2) the surface, promptly produce the illumination of 1LUX.Under different illumination conditions, respectively can be to different image frame per second should be arranged.Under the constant prerequisite of the yield value of the shooting environmental of high illumination and photosensory assembly 220, can improve the image frame per second.In low light source shooting environmental and when not changing the yield value of photosensory assembly 220, because photosensory assembly 220 so can elongate the time for exposure of image, makes the image frame per second reduce in order fully to be subjected to light.
Step S340, according to the result of step S330, the yield value of photosensory assembly 220 is adjusted in arithmetic element 250 decisions.Step S341, if make that the image frame per second can be greater than image frame number threshold value, then arithmetic element 250 can reduce/not adjust yield value through the shooting environmental behind the luminance compensation of light source generator 230.Step S342, opposite, if the image frame per second during less than image frame number threshold value, then increases the yield value of photosensory assembly 220.Step S350 carries out the white balance test, and the white balance test is used to judge the white balance of the input image of digital photographic device 200.
The invention provides a kind of digital photographic device 200 and luminance compensation method thereof with luminance compensation.When digital photographic device 200 is taken, be used for suitably adjusting the luminosity of the external light source of digital photography in Different Light.Make digital photographic device 200 in different ambient brightnesss, can keep the frame per second of digitized video and can not reduce the quality of image.In addition, also can avoid adjusting yield value, reduce news because the raising image that yield value produced is made an uproar to photosensory assembly 220.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (8)
1. the digital photographic device with luminance compensation is used for making a digital photographic device to keep the frame per second of digitized video by luminance compensation when Different Light is taken, and it is characterized in that this digital photographic device includes:
One photometry unit is used for the outside brightness of this digital photographic device of sensing;
One photosensory assembly is used to absorb the multiframe digitized video;
One light source generator is used to provide the illumination of this digital photographic device;
One light adjusting circuit is electrically connected at this light source generator, and this light adjusting circuit is used to control the brightness of illumination of this light source generator;
One memory cell is used to store luminance compensation means and gamma correction means; And
One arithmetic element, be electrically connected at this memory cell, this photometry unit and this light source generator respectively, be used to carry out these gamma correction means and this luminance compensation means, these gamma correction means are used to proofread and correct a brightness sensing fiducial value of this photometry unit, this brightness sensing fiducial value is used to adjust the luminous sensitivity of this photosensory assembly, and these luminance compensation means are used to adjust the brightness of this light source generator;
This digital photographic device is also carried out white balance test, judges the white balance of the input image of this digital photographic device.
2. the digital photographic device with luminance compensation according to claim 1 is characterized in that, these luminance compensation means are adjusted the brightness of this light source generator according to a time for exposure of this digitized video.
3. the digital photographic device with luminance compensation according to claim 1 is characterized in that, these luminance compensation means are adjusted the brightness of this light source generator according to a yield value of this digital photographic device.
4. the compensation method to the luminance compensation of digital photographic device is applied to the luminance compensation that a digital photographic device is taken in Different Light, it is characterized in that, this compensation method comprises the following steps:
Set a luminance reference value of a digital photographic device, this luminance reference value is used to adjust the luminous sensitivity of this digital photographic device;
According to the outside brightness of this luminance reference value and this digital photographic device, be used to determine the shooting one image frame per second of this digital photographic device;
Adjust the luminosity of a light source generator, make the filmed image frame per second of this digital photographic device be higher than an image frame number threshold value; And
Carry out white balance test, be used to judge the white balance of the input image of this digital photographic device.
5. the compensation method of the luminance compensation to digital photographic device according to claim 4 is characterized in that, and is after the luminosity step of adjusting this light source generator, further comprising the steps of:
If the luminosity of this light source generator, make the filmed image frame per second of this digital photographic device less than this image frame number threshold value, then carry out one and adjust yield value.
6. the compensation method of the luminance compensation to digital photographic device according to claim 4 is characterized in that, to the brightness look-up table, is used to adjust the luminosity of this light source generator according to an image frame per second.
7. the compensation method of the luminance compensation to digital photographic device according to claim 4 is characterized in that, to brightness curve, is used to adjust the luminosity of this light source generator according to an image frame per second.
8. the compensation method of the luminance compensation to digital photographic device according to claim 4 is characterized in that, and is after the luminosity step of adjusting this light source generator, further comprising the steps of:
According to the outside brightness of this digital photographic device and the luminosity of this light source generator, be used to determine whether to repeat this image frame per second of shooting of this digital photographic device of decision.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007103063587A CN101472077B (en) | 2007-12-28 | 2007-12-28 | Digital photographic apparatus with luminance compensation and compensation process thereof |
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| CN2007103063587A CN101472077B (en) | 2007-12-28 | 2007-12-28 | Digital photographic apparatus with luminance compensation and compensation process thereof |
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| CN101472077B true CN101472077B (en) | 2011-07-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102638642B (en) * | 2011-02-12 | 2014-04-02 | 原相科技股份有限公司 | Image system and interference eliminating method thereof |
| CN102651804B (en) * | 2011-02-28 | 2014-06-04 | 原相科技股份有限公司 | Image system and interference removing method thereof |
| CN102790862A (en) * | 2012-07-30 | 2012-11-21 | 成都西可科技有限公司 | Method for dynamically improving effect of cell phone front camera |
| CN103986880B (en) * | 2013-02-08 | 2017-10-10 | 原相科技股份有限公司 | Optical processing system, light-source brightness establishing method |
| US9648249B2 (en) * | 2013-11-20 | 2017-05-09 | Canon Kabushiki Kaisha | Image capturing apparatus, method of controlling the same, and storage medium |
| CN104754200A (en) * | 2013-12-31 | 2015-07-01 | 联芯科技有限公司 | Method and system for adjusting automatic exposure |
| CN105611139B (en) * | 2015-07-15 | 2018-04-10 | 宇龙计算机通信科技(深圳)有限公司 | Image processing method, image processing apparatus and terminal |
| CN107137026A (en) * | 2017-06-26 | 2017-09-08 | 深圳普思英察科技有限公司 | A kind of sweeping robot and its camera light-supplementing system, method |
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| CN1602623A (en) * | 2002-10-04 | 2005-03-30 | 索尼株式会社 | Digital camera |
| CN1547387A (en) * | 2003-12-09 | 2004-11-17 | 北京中星微电子有限公司 | An automatic exposure unit under dynamic frame rate condition |
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