CN111641786A - Method for improving snapshot imaging effect - Google Patents
Method for improving snapshot imaging effect Download PDFInfo
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- CN111641786A CN111641786A CN202010438016.6A CN202010438016A CN111641786A CN 111641786 A CN111641786 A CN 111641786A CN 202010438016 A CN202010438016 A CN 202010438016A CN 111641786 A CN111641786 A CN 111641786A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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Abstract
The invention discloses a method for improving a snapshot imaging effect, which belongs to the field of road snapshot. The invention can reduce the stimulation to the eyes of the driver at night, can achieve clearer imaging effect in the daytime, and is applied to road snapshot.
Description
Technical Field
The invention relates to the field of imaging, in particular to a method for improving a snapshot imaging effect.
Background
Night environment luminous intensity is low, and the photosensitive capacity influence to snapshot equipment is less, consequently the unit of taking a candid photograph can shoot the condition in the car more easily under the effect of light filling lamp, but in driving at night, because the environment is darker, the illumination condition in the driver's cabin is close with external, all is from the state of dark or being close to the dark, the driver shines the easy dispersed driver's of a white light attention in the front of the eye suddenly, causes the amazing to driver's eyes even, has great potential safety hazard. At daytime, the intensity of ambient light is higher, and the amazing of the sudden flicker of light filling lamp to driver's eyes can be little a lot at this moment, but equally, the illumination condition of driver's cabin inside is not like external illumination condition this moment, and equipment of taking a candid photograph is under the influence of a large amount of ambient light, even there is the existence of light filling lamp, also is difficult to take a photograph the situation in the clear car.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for improving the snapshot imaging effect, which can reduce the stimulation to the eyes of a driver during snapshot at night and can make the situation in a cab more clear in the daytime.
In order to achieve the purpose, the invention provides the following technical scheme: a method for improving the effect of snapshot imaging comprises the steps of adopting a laser generator capable of emitting invisible light sections, and additionally arranging a narrow-band filter taking the laser wavelength generated by the laser generator as the central wavelength in front of a receiving end of snapshot equipment.
By adopting the technical scheme, when the camera for capturing is used for capturing, the influence of the ambient light can be reduced through the narrow-band filter, the amount of the ambient light collected by the camera is reduced, in the daytime, the laser of the invisible light section which is emitted by the laser generator and reflected back inside the vehicle cab can be captured through the camera, the capture of the condition inside the vehicle cab is realized, and at the moment, the camera only can capture the ambient light with the same wavelength range as the narrow-band filter allows, so the influence of the ambient light on the imaging effect of the camera is reduced, and the imaging effect of the camera in daytime can be improved; when taking a candid photograph at night, because laser that laser generator produced is the laser of invisible light section, so compare in prior art can twinkle the scheme of the light filling lamp of obvious dazzling white light and compare, the amazing to driver's eyes that reduces by a wide margin reduces the influence to driver's attention, and the laser of invisible light section still can reflect the camera back in the driver's cabin of vehicle simultaneously, realizes the seizure of the inside condition of driver's cabin.
Preferably, the following steps: the passband of the narrow-band filter is not more than 5% of the wavelength of the laser emitted by the laser generator.
By adopting the technical scheme, compared with ultraviolet light and other high-grade laser light in invisible wave bands, the infrared laser light in invisible wave bands has lower energy level and smaller irritation to skin and eyes, can meet the imaging requirement required by the invention, and meanwhile, the laser generator capable of generating infrared light has lower cost and is more suitable for popularization and use; in addition, the transmission capability of the laser beams of blue, yellow, white, and other colors to the car film with a dark color is weak, and the car film with a dark color reflects the laser beams of blue, yellow, white, and other colors more, which adversely affects the image forming effect.
Preferably, the following steps: the laser generator generates invisible light band infrared light, and the laser wavelength is 808 nm; the exposure time is 1ms-5 ms; selecting a narrow-band filter with a pass band of 780nm-820 nm; the distance between the emitting end of the laser emitter and the reflecting point is not less than 1.5 m.
Preferably, the following steps: the laser generator generates invisible light band infrared light, and the laser wavelength is 860 nm; the exposure time is 1ms-5 ms; selecting a narrow-band filter with a passband of 840nm-890 nm; the distance between the emitting end of the laser emitter and the reflecting point is not less than 1.4 m.
Preferably, the following steps: the laser generator generates invisible light band infrared light, and the laser wavelength is 946 nm; the exposure time is 1ms-5 ms; selecting a narrow-band filter with a pass band of 930nm-970 nm; the distance between the emitting end of the laser emitter and the reflection point is not less than 1.2 m.
Preferably, the following steps: the laser generator generates invisible light band infrared light, and the laser wavelength is 1064 nm; the exposure time is 1ms-5 ms; selecting a narrow-band filter with a passband of 1040nm-1080 nm; the distance between the emitting end of the laser emitter and the reflection point is not less than 1.0 m.
By adopting the technical scheme, compared with ultraviolet light in invisible wave bands, light in visible wave bands and other high-grade laser, the infrared laser in invisible wave bands has lower energy level and less irritation to skin and eyes, can meet the imaging requirement of the invention, and meanwhile, the laser generator capable of generating infrared light has lower cost and is more suitable for popularization and use; in addition, the transmission capability of the laser beams of blue, yellow, white, and other colors to the car film with a dark color is weak, and the car film with a dark color reflects the laser beams of blue, yellow, white, and other colors more, which adversely affects the image forming effect.
A method of determining a mounting position of a laser generator, comprising the method of improving a snap-shot imaging effect of claim 1, further comprising: and placing a 7mm aperture diaphragm in front of a detector of the test system, testing the laser output pulse energy at different positions, testing for 5ms exposure time for one minute continuously, performing multiple tests, comparing the maximum value in the multiple tests with the I-type reachable emission limit value, and determining the position closest to the distance corresponding to the I-type reachable emission limit value as the limit installation position of the laser generator.
Through adopting above-mentioned technical scheme, can confirm the minimum mounting height of laser generator through continuous experiment for the influence of the laser that laser generator produced to the human body maintains in the regulation of relevant standard, can compare the laser of which kind of wavelength through the test method in this scheme simultaneously and can generate the better picture of result effect under suitable power and suitable height, and convenient to use person prefers and uses.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. the light supplement lamp is replaced by the laser with the invisible waveband, and meanwhile, the interference of ambient light is reduced by using the optical filter, so that the stimulation to the eyes of a driver during night snapshot can be reduced, and meanwhile, the situation in a cab can be photographed more clearly in the daytime;
2. the minimum installation height of the laser generator can be determined through continuous experiments, so that the influence of the laser generated by the laser generator on a human body is maintained in the regulation of relevant standards, meanwhile, a picture with better effect can be generated under proper power and proper height by comparing the laser with which wavelength through a testing method in the scheme, and a user can select the minimum installation height conveniently;
3. compared with the ultraviolet light and other high-energy laser in invisible wave bands, the infrared laser in invisible wave bands has lower energy level and less irritation to skin and eyes, can meet the imaging requirement of the invention, and meanwhile, the laser generator capable of generating infrared light has lower cost and is more suitable for popularization and use; in addition, the transmission capability of the blue, yellow, white and other laser beams to the car film with a dark color is weak, and meanwhile, the car film with a dark color can reflect more blue yellow, white and other laser beams, so that the imaging effect is influenced;
4. high-energy visible light has larger damage to human eyes compared with infrared laser in an invisible waveband, and is difficult to popularize and use.
Detailed Description
The first embodiment is as follows: a method for improving the snapshot imaging effect comprises the steps that a light supplement lamp in the prior art is replaced by a laser generator, the laser generator in the embodiment generates infrared laser with the wavelength of 946nm, the single exposure time is 5ms, a narrow-band filter with the central wavelength of 940nm is additionally arranged at the position of a camera lens of a camera for outputting image signals, the bandwidth of the narrow-band filter is 930nm-970nm, the output end of the laser generator is the same as the horizontal height of the camera lens for outputting the image signals, and the camera and the laser generator are started according to the principle of an induction coil in the prior art. When the position of the laser generator is determined, a 7mm aperture diaphragm is placed in front of a detector of a test system, the laser output pulse energy at different positions is tested, the exposure time is 5ms, the test is continuously carried out for one minute, the maximum value is compared with the I type reachable emission limit value, the position, closest to the distance position corresponding to the I type reachable emission limit value, is the installation position of the laser generator, and in order to facilitate actual operation, the distance change amount in the method for determining the position of the laser generator, which is described in the embodiment, is accurate to 0.1 m.
According to the technical solution described in the present example, the inventors performed the following experiment: laser wavelength: 946 nm; single measurement standard deviation: 0.054 nm. Through tests, when the exposure time is 1ms, the pulse energy is output at the position of the light outlet: 0.395 mJ; when the exposure time is 5ms, the pulse energy is output at the position of the light outlet: 1.473 mJ. Placing a 7mm aperture diaphragm in front of a detector of a test system, testing laser output pulse energy at different positions, and 1.2m when the exposure time is 5 ms: 1.412 mj; 1.3m at 5ms exposure time: 1.221 mj; exposure time at 1.4m for 5 ms: 0.96 mj.
According to the standard: EN 60825-1: 2014 Safety of laser products-Part 1: Equipment Classification and requisitions and IEC TR 60825-13: 2011 Safety of laser products-Part 13: measures for classification of laser products, 3B class reachable emitter limits: 46.19mj @5ms, so the technical scheme described in the embodiment conforms to EN 60825-1: according to the laser radiation requirements of 4 types of organ products in 2014 safety of laser products-Part 1: Equipment classification and requirements, at the position 1.3m away from the light outlet, the laser radiation requirements only meet EN 60825-1 through a 7mm aperture diaphragm: laser radiation requirements for class I laser products in Safety of laser products-Part 1: Equipment classification and requirements 2014. It was thus finally determined that the horizontal shortest straight-line distance between the laser generator and the induction coil in this embodiment is 1.3 m.
In the present embodiment, according to the method for determining a laser mounter and the finally obtained positional relationship between the laser generator and the induction coil described above, it is possible to ensure that the influence on the human body meets the relevant regulations described above on the premise of achieving the object of the present invention.
Example two: the present embodiment is different from the first embodiment in that: the laser generator generates invisible infrared laser with the wavelength of 808nm, the single exposure time is 5ms, the central wavelength of the narrow-band filter is 808nm, the bandwidth of the narrow-band filter is 780nm-820nm, and finally the horizontal shortest straight-line distance between the laser generator and the induction coil is determined to be 1.6 m.
According to the technical solution described in this example, the inventors performed the following experiment: laser wavelength: 808 nm; single measurement standard deviation: 0.066 nm. Through tests, when the exposure time is 1ms, the pulse energy is output at the position of the light outlet: 0.438 mJ; when the exposure time is 5ms, the pulse energy is output at the position of the light outlet: 1.624 mJ. Placing a 7mm aperture diaphragm in front of a detector of a test system, testing laser output pulse energy at different positions, and 1.4m when the exposure time is 5 ms: 1.481 mj; 1.5m at 5ms exposure time: 1.289 mj; exposure time at 1.6m for 5 ms: 1.027 mj.
According to the standard: EN 60825-1: 2014 Safety of laser products-Part 1: Equipment Classification and requisitions and IEC TR 60825-13: 2011 Safety of laser products-Part 13: measures for classification of laser products, 3B class reachable emitter limits: 46.19mj @5ms, so the technical scheme described in the embodiment conforms to EN 60825-1: according to the laser radiation requirements of 4 types of organ products in 2014 safety of laser products-Part 1: Equipment classification and requirements, at the position 1.3m away from the light outlet, the laser radiation requirements only meet EN 60825-1 through a 7mm aperture diaphragm: laser radiation requirements for class I laser products in Safety of laser products-Part 1: Equipment classification and requirements 2014. It was thus finally determined that the horizontal shortest straight-line distance between the laser generator and the induction coil in this embodiment is 1.5 m.
Example three: the present embodiment is different from the first embodiment in that: the laser generator generates invisible ultraviolet laser with the wavelength of 405nm, the single exposure time is 1ms, the central wavelength of the narrow-band filter is 405nm, the bandwidth of the narrow-band filter is 390nm-430nm, and finally the horizontal shortest straight-line distance between the laser generator and the induction coil is determined to be 2.5 m.
The working principle of the method for improving the snapshot imaging effect during use is as follows: when the camera for capturing is used for capturing, the influence of ambient light can be reduced through the narrow-band filter, the amount of the ambient light collected by the camera is reduced, in the daytime, laser of an invisible light section which is emitted by the laser generator and reflected back inside a vehicle cab can be captured through the camera, the capture of the condition inside the vehicle cab is realized, and at the moment, the camera can only capture the ambient light with the same wavelength range as the narrow-band filter allows, so that the influence of the ambient light on the imaging effect of the camera is reduced, and the imaging effect of the camera in the daytime can be improved; when taking a candid photograph at night, because laser that laser generator produced is the laser of invisible light section, so compare in prior art can twinkle the scheme of the light filling lamp of obvious dazzling white light and compare, the amazing to driver's eyes that reduces by a wide margin reduces the influence to driver's attention, and the laser of invisible light section still can reflect the camera back in the driver's cabin of vehicle simultaneously, realizes the seizure of the inside condition of driver's cabin.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. A method for improving the effect of snapshot imaging is characterized in that: including the laser through the invisible light section of laser generator production, the invisible light section laser that laser generator takes place reflects after touching the reflection object to by adding the narrowband filter of establishing before the receiving end of taking a candid photograph equipment and being received by taking a candid photograph equipment, simultaneously the central wavelength of narrowband filter with the laser wavelength of the invisible light section that laser generator sent is the same.
2. The method for improving the effect of snapshot imaging according to claim 1, wherein: the passband of the narrow-band filter is not more than 5% of the wavelength of the laser emitted by the laser generator.
3. The method for improving the effect of snapshot imaging according to claim 1 or 2, wherein: the laser generator generates invisible light band infrared light, and the laser wavelength is 808 nm; selecting a narrow-band filter with a pass band of 780nm-820nm, wherein the exposure time is 1ms-5 ms; the distance between the emitting end of the laser emitter and the reflecting point is not less than 1.6 m.
4. The method for improving the effect of snapshot imaging according to claim 1 or 3, wherein: the laser generator generates invisible light band infrared light, and the laser wavelength is 860 nm; selecting a narrow-band filter with a passband of 840nm-880nm and an exposure time of 1ms-5 ms; the distance between the emitting end of the laser emitter and the reflecting point is not less than 1.4 m.
5. The method for improving the effect of snapshot imaging according to claim 1 or 4, wherein: the laser generator generates invisible light band infrared light, and the laser wavelength is 946 nm; the exposure time of a narrow-band filter with a pass band of 930nm-970nm is 1ms-5ms, and the distance between the transmitting end of the laser transmitter and the position of a reflecting point is not less than 1.3 m.
6. The method for improving the effect of snapshot imaging according to claim 1 or 5, wherein: the laser generator generates invisible light band infrared light, and the laser wavelength is 1064 nm; the exposure time of a narrow-band filter with a passband of 1040-1080 nm is 1-5 ms, and the distance between the transmitting end of the laser transmitter and the position of a reflecting point is not less than 1.0 m.
7. A method of determining a mounting location of a laser generator, comprising: the method for improving the effect of snapshot imaging as set forth in claim 1, further comprising: and placing a 7mm aperture diaphragm in front of a detector of the test system, testing the laser output pulse energy at different positions, testing for 5ms exposure time for one minute continuously, performing multiple tests, comparing the maximum value in the multiple tests with the I-type reachable emission limit value, and determining the position closest to the distance corresponding to the I-type reachable emission limit value as the limit installation position of the laser generator.
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| CN202010438016.6A CN111641786A (en) | 2020-05-21 | 2020-05-21 | Method for improving snapshot imaging effect |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140061477A1 (en) * | 2010-12-15 | 2014-03-06 | Institut Francais Des Sciences Et Technologies Des Transports De L'amenagement Des Reseaux | Active device for viewing a scene through a diffusing medium, use of said device, and viewing method |
| CN105635679A (en) * | 2015-12-30 | 2016-06-01 | 深圳市图雅丽特种技术有限公司 | Active anti-glare night vision system of vehicle-mounted special device and realization method |
| CN109819175A (en) * | 2019-01-23 | 2019-05-28 | 中国科学院长春光学精密机械与物理研究所 | A kind of photographic method and camera arrangement |
| CN110352361A (en) * | 2017-03-31 | 2019-10-18 | 华为技术有限公司 | With the device and method of human eye safety design scanning and ranging |
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2020
- 2020-05-21 CN CN202010438016.6A patent/CN111641786A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140061477A1 (en) * | 2010-12-15 | 2014-03-06 | Institut Francais Des Sciences Et Technologies Des Transports De L'amenagement Des Reseaux | Active device for viewing a scene through a diffusing medium, use of said device, and viewing method |
| CN105635679A (en) * | 2015-12-30 | 2016-06-01 | 深圳市图雅丽特种技术有限公司 | Active anti-glare night vision system of vehicle-mounted special device and realization method |
| CN110352361A (en) * | 2017-03-31 | 2019-10-18 | 华为技术有限公司 | With the device and method of human eye safety design scanning and ranging |
| CN109819175A (en) * | 2019-01-23 | 2019-05-28 | 中国科学院长春光学精密机械与物理研究所 | A kind of photographic method and camera arrangement |
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Application publication date: 20200908 |
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