CN107295271A - A kind of illuminance compensation method and system of spherical source - Google Patents
A kind of illuminance compensation method and system of spherical source Download PDFInfo
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- CN107295271A CN107295271A CN201710724760.0A CN201710724760A CN107295271A CN 107295271 A CN107295271 A CN 107295271A CN 201710724760 A CN201710724760 A CN 201710724760A CN 107295271 A CN107295271 A CN 107295271A
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- spherical source
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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
- H04N23/71—Circuitry for evaluating the brightness variation
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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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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
This application discloses a kind of illuminance compensation method and system of spherical source, including：Illumination point inspection is carried out to spherical source, luminance factor is calculated；When spherical source is burning light source, sample module captures the data of image file, calculates the first average value of the central area brightness of image file；According to the first average value and luminance factor of central area brightness, the brightness value after being compensated；According to the brightness value after compensation, the illumination to spherical source is compensated.Because the differences of illumination intensities of spherical source has a certain impact to picture brightness, utilize luminance factor compensation, and then compensate the illumination of spherical source, influence of the spherical source differences of illumination intensities to picture brightness in production process can so be reduced, ensure picture brightness uniformity, make module pairing assembling when picture brightness evenly.
Description
Technical field
The present invention relates to optical field, the illuminance compensation method and system of more particularly to a kind of spherical source.
Background technology
Panorama dual camera is by the fish-eye camera of two angles of visual field (Field of View, abbreviation FOV) more than 180 °
Assemble back-to-back, panoramic picture is also that bat figure is spliced respectively by two cameras.Because module has differences in itself
Property to single module, it is necessary to be corrected, and its luminance parameter is burned onto in module.Luminance parameter is by specific spherical light
What the data obtained under source were calculated, spherical source directly determines the accuracy and uniformity of programming parameters.
In actual mechanical process, due to the differences of illumination intensities between spherical source, even if differences of illumination intensities very little, using same
Parameter is covered, the brightness G values of module exposure remain certain difference, can cause to draw during image co-registration after module pairing installation
Face brightness is inconsistent.
In the production process of module, between different spherical sources and same light source is not in the same time there is also difference,
Therefore how luminance factor compensation is carried out to the illumination of light source, is those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
In view of this, it is an object of the invention to provide a kind of illuminance compensation method and system of spherical source, it can subtract
Influence of the spherical source differences of illumination intensities to picture brightness in few production process, it is ensured that the uniformity of picture brightness, matches module
Picture brightness is evenly during assembling.Its concrete scheme is as follows：
A kind of illuminance compensation method of spherical source, including：
Illumination point inspection is carried out to the spherical source, luminance factor is calculated；
When the spherical source is burning light source, the sample module captures the data of image file, calculates described
First average value of the central area brightness of image file；
According to the first average value and the luminance factor of the central area brightness, the brightness value after being compensated；
According to the brightness value after the compensation, the illumination to the spherical source is compensated.
Preferably, in the illuminance compensation method of above-mentioned spherical source provided in an embodiment of the present invention, to the spherical light
Source carries out illumination point inspection, calculates luminance factor, specifically includes：
When the spherical source is standard sources, the data of described image file are obtained using standard module, are calculated
Second average value of the central area brightness of described image file；
When the spherical source is burning light source, the data of described image file are obtained using standard module, are calculated
3rd average value of the central area brightness of described image file；
According to the ratio between second average value and the 3rd average value, luminance factor is drawn.
Preferably, in the illuminance compensation method of above-mentioned spherical source provided in an embodiment of the present invention, according to the compensation
Brightness value afterwards, after being compensated to the illumination of the spherical source, in addition to：
Brightness value after the compensation is burned onto in the sample module.
Preferably, in the illuminance compensation method of above-mentioned spherical source provided in an embodiment of the present invention, in the spherical light
The colour temperature in source is setting value, when illumination is setting range, and the illumination of brightness value and the spherical source after the compensation is into just
Than.
Preferably, in the illuminance compensation method of above-mentioned spherical source provided in an embodiment of the present invention, the illumination is set
Scope is determined for 800lux to 1200lux.
Preferably, in the illuminance compensation method of above-mentioned spherical source provided in an embodiment of the present invention, the spherical source
Colour temperature be 5100K.
Preferably, in the illuminance compensation method of above-mentioned spherical source provided in an embodiment of the present invention, the sample module
Including single fish-eye camera.
The embodiment of the present invention additionally provides a kind of luminance compensation system of spherical source, including：
Luminance factor computing module, for carrying out illumination point inspection to the spherical source, calculates luminance factor；
First mean value calculation module, for when the spherical source is burning light source, the sample module crawl to be schemed
As the data of file, the first average value of the central area brightness of described image file is calculated；
Brightness value computing module, for the first average value and the luminance factor according to the central area brightness, is obtained
Brightness value after to compensation；
Illuminance compensation module, for according to the brightness value after the compensation, the illumination to the spherical source to be compensated.
A kind of illuminance compensation method and system of spherical source provided by the present invention, including：Spherical source is shone
Degree point inspection, calculates luminance factor；When spherical source is burning light source, sample module captures the data of image file, calculates
Go out the first average value of the central area brightness of image file；According to the first average value and luminance factor of central area brightness,
Brightness value after being compensated；According to the brightness value after compensation, the illumination to spherical source is compensated.Due to spherical source
Differences of illumination intensities has a certain impact to picture brightness, using luminance factor compensation, and then compensates the illumination of spherical source,
Influence of the spherical source differences of illumination intensities to picture brightness in production process can so be reduced, it is ensured that the uniformity of picture brightness,
Make module pairing assembling when picture brightness evenly.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is the illuminance compensation method flow diagram of spherical source provided in an embodiment of the present invention；
Fig. 2 is the coordinate diagram between light illumination provided in an embodiment of the present invention and brightness value.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The present invention provides a kind of illuminance compensation method of spherical source, as shown in figure 1, comprising the following steps：
S101, to spherical source carry out illumination point inspection, calculate luminance factor；
S102, spherical source be burning light source when, sample module capture image file data, calculate image file
Central area brightness the first average value；
S103, the first average value and luminance factor according to central area brightness, the brightness value after being compensated；
S104, according to the brightness value after compensation, the illumination to spherical source is compensated.
In the illuminance compensation method of above-mentioned spherical source provided in an embodiment of the present invention, spherical source is shone first
Degree point inspection, calculates luminance factor；Then when spherical source is burning light source, sample module captures the data of image file,
Calculate the first average value of the central area brightness of image file；Afterwards according to the first average value of central area brightness and bright
Spend coefficient, the brightness value after being compensated；Finally according to the brightness value after compensation, the illumination to spherical source is compensated.By
Picture brightness is had a certain impact in the differences of illumination intensities of spherical source, using luminance factor compensation, and then ball is compensated
The illumination of shape light source, can so reduce influence of the spherical source differences of illumination intensities to picture brightness in production process, it is ensured that picture
The uniformity of brightness, make module pairing assembling when picture brightness evenly.
Specifically, it is assumed that the luminance factor calculated is k, and the first average value of central area brightness is G1；
Brightness value G=G1*k after now compensating.
It should be noted that when spherical source is burning light source, carrying out One Time Programmable (One Time
Programable, abbreviation OTP) burning；Image file is schemed for Raw.
Further, in the specific implementation, in the illuminance compensation method of above-mentioned spherical source provided in an embodiment of the present invention
In, step S101 carries out illumination point inspection to spherical source, calculates luminance factor, specifically may comprise steps of：
First, when spherical source is standard sources, the data of image file is obtained using standard module, image is calculated
Second average value of the central area brightness of file；
Then, when spherical source is burning light source, the data of image file is obtained using standard module, image is calculated
3rd average value of the central area brightness of file；
Finally, according to the ratio between the second average value and the 3rd average value, luminance factor is drawn.
Specifically, the second average value of such as central area brightness is G2, and the 3rd average value of central area brightness is G3,
The absolute deviation for calculating G2 and G3 is used as luminance factor：K=G2/G3.
Work as G2=600, G3=650, G1=655, then luminance factor k=G2/G3=600/650=0.9231；After compensation
G=G1*k=655*0.9321=605, that is, compensate after brightness value be 605.
In the specific implementation, in the illuminance compensation method of above-mentioned spherical source provided in an embodiment of the present invention, in order to enter
One step makes module match picture brightness after assembling, and evenly, according to the brightness value after compensation, the illumination to spherical source is mended
After repaying, it can also include：
Brightness value after compensation is burned onto in sample module.
It should be noted that platform end can directly invoke the brightness value of sample module burning.
In addition, it is necessary to which explanation, sample module is fish-eye camera module, fish-eye camera is close or larger than for visual angle
CCD/CMOS photo-sensitive cells are provided with 180 ° of camera lens, fish-eye camera, the core of CCD/CMOS photo-sensitive cells is all one
Light sensitive diode, the light sensitive diode can produce output current after light irradiation is received, within the specific limits, light source production
Raw current strength is directly proportional to intensity of illumination.
In the specific implementation, in the illuminance compensation method of above-mentioned spherical source provided in an embodiment of the present invention, such as Fig. 2 institutes
Show, be setting value in the colour temperature of spherical source, when illumination is setting range, the illumination of brightness value and spherical source after compensation into
Direct ratio.
Now, as shown in Fig. 2 the setting range of illumination can be 800lux to 1200lux；In the specific implementation, it is spherical
The colour temperature of light source could be arranged to 5100K, i.e. spherical source colour temperature necessarily (such as 5000K), and illumination is 800lux to 1200lux
When, brightness G values are directly proportional to illumination.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of luminance compensation system of spherical source, due to
The principle that the system solves problem is similar to a kind of illuminance compensation method of foregoing spherical source, therefore the implementation of the system can be with
Referring to the implementation of the illuminance compensation method of spherical source, repeat part and repeat no more.
In the specific implementation, the luminance compensation system of spherical source provided in an embodiment of the present invention, is specifically included：
Luminance factor computing module, for carrying out illumination point inspection to spherical source, calculates luminance factor；
First mean value calculation module, for when spherical source is burning light source, sample module to capture image file
Data, calculate the first average value of the central area brightness of image file；
Brightness value computing module, for the first average value and luminance factor according to central area brightness, after being compensated
Brightness value；
Illuminance compensation module, for according to the brightness value after compensation, the illumination to spherical source to be compensated.
In above-mentioned luminance compensation system provided in an embodiment of the present invention, it can be subtracted by the interaction of above-mentioned module
Influence of the spherical source differences of illumination intensities to picture brightness in few production process, it is ensured that the uniformity of picture brightness, matches module
Picture brightness is evenly during assembling.
A kind of illuminance compensation method and system of spherical source provided in an embodiment of the present invention, including：Spherical source is entered
Row illumination point is examined, and calculates luminance factor；When spherical source is burning light source, sample module captures the data of image file,
Calculate the first average value of the central area brightness of image file；According to the first average value of central area brightness and brightness system
Number, the brightness value after being compensated；According to the brightness value after compensation, the illumination to spherical source is compensated.Due to spherical light
The differences of illumination intensities in source has a certain impact to picture brightness, using luminance factor compensation, and then compensates spherical source
Illumination, can so reduce influence of the spherical source differences of illumination intensities to picture brightness in production process, it is ensured that the one of picture brightness
Cause property, make module pairing assembling when picture brightness evenly.
Finally, in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of key elements not only include that
A little key elements, but also other key elements including being not expressly set out, or also include be this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except also there is other identical element in the process including the key element, method, article or equipment.
The illuminance compensation method and system to spherical source provided by the present invention are described in detail above, herein
Apply specific case to be set forth the principle and embodiment of the present invention, the explanation of above example is only intended to help
Understand the method and its core concept of the present invention；Simultaneously for those of ordinary skill in the art, according to the thought of the present invention,
It will change in specific embodiments and applications, in summary, this specification content should not be construed as to this
The limitation of invention.
Claims (8)
1. a kind of illuminance compensation method of spherical source, it is characterised in that including：
Illumination point inspection is carried out to the spherical source, luminance factor is calculated；
When the spherical source is burning light source, the sample module captures the data of image file, calculates described image
First average value of the central area brightness of file；
According to the first average value and the luminance factor of the central area brightness, the brightness value after being compensated；
According to the brightness value after the compensation, the illumination to the spherical source is compensated.
2. the illuminance compensation method of spherical source according to claim 1, it is characterised in that carried out to the spherical source
Illumination point is examined, and is calculated luminance factor, is specifically included：
When the spherical source is standard sources, the data of described image file are obtained using standard module, are calculated described
Second average value of the central area brightness of image file；
When the spherical source is burning light source, the data of described image file are obtained using standard module, are calculated described
3rd average value of the central area brightness of image file；
According to the ratio between second average value and the 3rd average value, luminance factor is drawn.
3. the illuminance compensation method of spherical source according to claim 2, it is characterised in that according to bright after the compensation
Angle value, after being compensated to the illumination of the spherical source, in addition to：
Brightness value after the compensation is burned onto in the sample module.
4. the illuminance compensation method of spherical source according to claim 3, it is characterised in that in the color of the spherical source
Temperature is setting value, and when illumination is setting range, the brightness value after the compensation is directly proportional to the illumination of the spherical source.
5. the illuminance compensation method of spherical source according to claim 4, it is characterised in that the setting range of the illumination
For 800lux to 1200lux.
6. the illuminance compensation method of spherical source according to claim 5, it is characterised in that the colour temperature of the spherical source
For 5100K.
7. the illuminance compensation method of spherical source according to claim 6, it is characterised in that the sample module includes single
Individual fish-eye camera.
8. a kind of luminance compensation system of spherical source, it is characterised in that including：
Luminance factor computing module, for carrying out illumination point inspection to the spherical source, calculates luminance factor；
First mean value calculation module, for when the spherical source is burning light source, the sample module crawl image to be literary
The data of part, calculate the first average value of the central area brightness of described image file；
Brightness value computing module, for the first average value and the luminance factor according to the central area brightness, is mended
Brightness value after repaying；
Illuminance compensation module, for according to the brightness value after the compensation, the illumination to the spherical source to be compensated.
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