CN103017896A - Illumination photometry method and illumination photometry device - Google Patents
Illumination photometry method and illumination photometry device Download PDFInfo
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- CN103017896A CN103017896A CN2012105049481A CN201210504948A CN103017896A CN 103017896 A CN103017896 A CN 103017896A CN 2012105049481 A CN2012105049481 A CN 2012105049481A CN 201210504948 A CN201210504948 A CN 201210504948A CN 103017896 A CN103017896 A CN 103017896A
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Abstract
The invention is applicable to the technical field of mobile terminals and provides an illumination photometry method. The illumination photometry method comprises the steps of starting a camera which is placed at a position facing to a light source; detecting an exposure voltage obtained by exposure of an image sensor in the camera; obtaining an illumination value associated with the exposure voltage from a preset database; and determining the illumination value associated with the exposure voltage as the illumination value of the position where the camera is located. By means of placing the camera at the position facing to a light source, detecting the exposure voltage of the image sensor during imaging of the camera and transforming the exposure voltage obtained from detection to the corresponding illumination value, illumination photometry is accomplished without depending on a special illumination meter, the cost for illumination photometry is effectively lowered and users can use conveniently.
Description
Technical field
The invention belongs to field of measuring technique, relate in particular to a kind of illumination photometry method and device.
Background technology
Illumination is used for the degree that expression is irradiated by light by the light body surface, with people's life close relationship is arranged.Cross degree that dark light can cause human-body fatigue considerably beyond eyes itself, therefore, uncomfortable or relatively poor lighting condition is to cause the accident and tired one of the main reasons.In daily life, work and study under the light of darkness shines too strongly or too all are harmful to eyes, so keep suitable illumination constantly, to improving working and learning efficient very large benefit are arranged.
Yet, illumination can only be measured with special-purpose illuminometer (or claiming the lux meter) at present, and illuminometer normally is comprised of selenium cell (or silicon photocell) and microampere meter, is individual independently instrument, its manufacturing cost is relatively high, and inconvenient ordinary consumer is used.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of illumination photometry method, is intended to solve the high problem of existing illuminometer manufacturing cost.
The embodiment of the invention is achieved in that a kind of illumination photometry method, comprising:
Start camera, described camera places the position towards light source;
Detect the exposure voltage that the imageing sensor exposure obtains in the described camera;
In presetting database, obtain the brightness value that is associated with described exposure voltage;
The brightness value that described and described exposure voltage is associated is defined as the brightness value of described camera present position.
Another purpose of the embodiment of the invention is to provide a kind of illumination photometry device, comprising:
Start unit is used for starting camera, and described camera places the position towards light source;
The first detecting unit, the exposure voltage that obtains for detection of imageing sensor exposure in the described camera;
Acquiring unit is used for obtaining the brightness value that is associated with described exposure voltage in presetting database;
The first determining unit is used for the brightness value that described and described exposure voltage is associated is defined as the brightness value of described camera present position.
In the embodiment of the invention by camera being placed the position towards light source, the exposure voltage of imageing sensor when detecting camera imaging, and the exposure voltage that detects is converted to corresponding brightness value, thereby do not relying under the prerequisite of special-purpose illuminometer, finish the measurement of illumination, effectively reduce the measurement cost of illumination photometry, convenient for users.
Description of drawings
Fig. 1 is the realization flow figure of the illumination photometry method that provides of the embodiment of the invention;
Fig. 2 is the realization flow figure of the illumination photometry method that provides of another embodiment of the present invention;
Fig. 3 is the structured flowchart of the illumination photometry device that provides of the embodiment of the invention;
Fig. 4 is the structured flowchart of the illumination photometry device that provides of another embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
In the embodiment of the invention by camera being placed the position towards light source, the exposure voltage of imageing sensor when detecting camera imaging, and the exposure voltage that detects is converted to corresponding brightness value, thereby do not relying under the prerequisite of special-purpose illuminometer, finish the measurement of illumination, effectively reduce the measurement cost of illumination photometry, convenient for users.
Need to prove, the device that is used for the illumination photometry method that the operation embodiment of the invention provides can be realized based on the intelligent terminal that possesses camera, preferably, can realize based on the intelligent mobile terminal equipment that possesses camera, include but not limited to the intelligent mobile terminal equipment such as mobile phone, panel computer, notebook, to improve the portability of illumination photometry equipment, make things convenient for the user to use the illumination photometry function whenever and wherever possible.
Fig. 1 shows the realization flow of the illumination photometry method that the embodiment of the invention provides, and details are as follows:
In step S101, start camera, described camera places the position towards light source.
In the present embodiment, carry out at needs under the scene of illumination photometry, camera is placed position towards light source.For example, if light source is the pendent lamp on the ceiling, then camera is rotated up to the position of aiming at pendent lamp; When if light source is the ground light source, then camera is rotated down to the position of aiming at the ground light source.
Preferably, when the equipment that carries out illumination photometry is when possessing the intelligent terminal of front-facing camera and post-positioned pick-up head simultaneously, for the ground light source, the front-facing camera of intelligent terminal can be opened, for aerial light source, the post-positioned pick-up head of intelligent terminal can be opened, thus, in the process of illumination photometry, can remain that the screen of intelligent terminal is in the interior state of user's visual line of sight, make things convenient for the user to read brightness value and execution associative operation.
In step S102, detect the exposure voltage that the imageing sensor exposure obtains in the described camera.
In the present embodiment, when the startup camera and after with the camera alignment light source, the picture that camera is taken generates optical imagery by camera lens and projects on imageing sensor (Sensor) surface, imageing sensor namely exposes to the optical imagery of projection, and relevant exposure parameter is obtained corresponding exposure voltage after by opto-electronic conversion.
The testing process of above-mentioned exposure voltage can be obtained by the relevant parameter sensing of the processor detected image sensor in the camera, is not used in restriction the present invention at this.
Because the same image for the camera shooting, also there is some difference to be positioned at the light conditions in diverse location zone of image, the light conditions of the band of position near apart from light source is better, the light conditions of the band of position far away apart from light source is then slightly weak, therefore, the exposure voltage on the diverse location zone also is different.In concrete operating process, can be after the camera alignment light source, detect the user in the preview interface of taking pictures by drawing a circle or the selected image-region that comprises light source image of touch screen operation such as click, thereby the image-region of selecting for the user specially carries out the detection of exposure voltage, because the image-region that this user selectes has comprised light source, therefore detect the correct exposure voltage that can reflect whole image at this image-region.
In addition, also can detect the exposure voltage that obtains on a plurality of image-regions, and will be wherein the exposure voltage of numerical value maximum needing in the illumination photometry process to be defined as the exposure voltage that uses.
As a preferred embodiment of the present invention, step S102 is specially:
Detect the exposure voltage that the exposure of imageing sensor central area obtains in the described camera.
When carrying out illumination photometry, because most of users can initiatively place light source the center (also can light source be placed the view-finder center at take pictures preview interface or relevant measurement interface prompting user simultaneously) of view-finder, therefore, can give tacit consent to the exposure voltage that detects imageing sensor central area in the camera, measure the needed accurate exposure voltage of illumination thereby get access to.
In step S103, in presetting database, obtain the brightness value that is associated with described exposure voltage.
Because the principle of illumination photometry namely is when electrooptical device is subject to the light irradiation, light receiving surface at electrooptical device produces photoelectric effect, luminous energy is directly changed into electric energy, and calculates brightness value according to the relation between the illumination on the potential difference (PD) that is converted to and the electrooptical device light receiving surface.Therefore, in the present embodiment, before the step S101, also by in presetting database, storing the incidence relation of different exposure voltages and brightness value, after detecting exposure voltage, namely can from presetting database, get access to the brightness value that is associated with this exposure voltage.
Particularly, before step S101, can be by the experiment of person skilled, camera is placed under the different standard lamp of luminous intensities, carry out the obtaining of corresponding relation of exposure voltage and brightness value, thereby get access to the brightness value that is associated with each grade exposure voltage, be stored in the presetting database.
In step S104, the brightness value that described and described exposure voltage is associated is defined as the brightness value of described camera present position.
In specific implementation, because may there be trickle instability in the light intensity that light source sends, and also can there be instability in the situation of finding a view of camera because of factors such as artificial shakes, therefore, the exposure voltage that the imageing sensor exposure obtains in the camera is real-time change, meanwhile, the brightness value that is associated that gets access to according to exposure voltage also is real-time change, therefore, in step S104, specifically can by detecting lock operation, to lock the current brightness value of measuring (brightness value that namely no longer shows real-time change), the brightness value of locking be defined as the brightness value of the current present position of camera.
Wherein, lock operation can by detecting the push of related physical button, perhaps be carried out by the push that detects virtual key in the relative program interface.
Thus, by camera being placed the position towards light source, the exposure voltage of imageing sensor when detecting camera imaging, and the exposure voltage that detects is converted to corresponding brightness value, thereby can not rely under the prerequisite of special-purpose illuminometer, finish the measurement of illumination, reduced the measurement cost of illumination photometry, convenient for users.
As one embodiment of the present of invention, further, after measuring brightness value, can by judging the size of brightness value, come prompting user whether to need current illumination situation is adjusted.
Fig. 2 shows the realization flow of the illumination photometry method that another embodiment of the present invention provides, and as shown in Figure 2, after step S104, also comprises:
Step S105 judges whether described brightness value is in the default illumination threshold scope.
Before step S105, can detect the current illumination photometry scene that the user arranges, thereby determine the default illumination threshold scope corresponding with the current illumination photometry scene of user's setting.
In specific implementation, in the storage unit that the intelligent terminal internal system is correlated with, can determine the different default illumination threshold scope of several covers according to technician's experience or test respectively, every cover is preset the corresponding illumination photometry scene of illumination threshold scope, and has reflected the default illumination threshold scope of optimum eyes of user health under this illumination photometry scene.The user can come illumination measurement field scape is selected according to current residing actual scene, to call out the default illumination threshold scope corresponding with current actual scene.
For example, when the user is positioned at when outdoor, illumination is stronger, and then default illumination threshold scope can be positioned at an interval that value is higher; When the user was in night, a little less than the illumination, then default illumination threshold scope can be positioned at an interval that value is lower.
In step S105, the brightness value of measuring by judgement and the different magnitude relationship of default illumination threshold scope, can execution in step S106, step S107 or step S108:
In step S106, in described brightness value is in described default illumination threshold scope, point out described brightness value normal.
At this moment, brightness value is positioned at the illumination range of suitable human eye health, and then the prompting user brightness value is normal.
In step S107, when described brightness value greater than described default illumination threshold range limit, point out described brightness value excessive.
At this moment, the user can reduce brightness value by taking suitably to turn down the measure such as light-source brightness, brightness value is reduced in the scope of suitable human eye health.
In step S108, when described brightness value less than described default illumination threshold scope lower limit, point out described brightness value too small.
At this moment, the user can improve brightness value by taking suitably to increase the measure such as light-source brightness, brightness value is brought up in the scope of suitable human eye health.
Thus, based on the illumination photometry result, can be further for the user provide illumination adjustment suggestion, the user who has improved illumination photometry experiences.
In the embodiment of the invention by camera being placed the position towards light source, the exposure voltage of imageing sensor when detecting camera imaging, and the exposure voltage that detects is converted to corresponding brightness value, thereby do not relying under the prerequisite of special-purpose illuminometer, finish the measurement of illumination, effectively reduce the measurement cost of illumination photometry, convenient for users.
Fig. 3 shows the structured flowchart of the illumination photometry device that the embodiment of the invention provides, and this device can be arranged in the intelligent terminals such as mobile phone, panel computer, is used for operation Fig. 1 of the present invention and the described illumination photometry method of Fig. 2 embodiment.For convenience of explanation, only show the part relevant with the present embodiment.
With reference to Fig. 3, this device comprises:
Start unit 31 starts camera, and described camera places the position towards light source.
The first detecting unit 32 detects the exposure voltage that the imageing sensor exposure obtains in the described camera.
Acquiring unit 33 obtains the brightness value that is associated with described exposure voltage in presetting database.
The first determining unit 34, the brightness value that described and described exposure voltage is associated is defined as the brightness value of described camera present position.
Alternatively, this device also comprises:
Storage unit, the incidence relation of the described exposure voltage of storage and described brightness value in described presetting database.
Alternatively, the exposure voltage that specifically obtains for detection of imageing sensor central area exposure in the described camera of the first detecting unit 32.
Alternatively, as shown in Figure 4, this device also comprises:
Judging unit 35 is used for judging whether described brightness value is in the default illumination threshold scope;
The first Tip element 36 in described brightness value is in described default illumination threshold scope, points out described brightness value normal.
The second Tip element 37, when described brightness value greater than described default illumination threshold range limit, point out described brightness value excessive.
The 3rd Tip element 38, when described brightness value less than described default illumination threshold scope lower limit, point out described brightness value too small.
Alternatively, this device also comprises:
The second detecting unit detects the current illumination photometry scene that the user arranges.
The second determining unit is determined the described default illumination threshold scope corresponding with described current illumination photometry scene.
In the embodiment of the invention by camera being placed the position towards light source, the exposure voltage of imageing sensor when detecting camera imaging, and the exposure voltage that detects is converted to corresponding brightness value, thereby do not relying under the prerequisite of special-purpose illuminometer, finish the measurement of illumination, effectively reduce the illumination photometry cost, convenient for users.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an illumination photometry method is characterized in that, comprising:
Start camera, described camera places the position towards light source;
Detect the exposure voltage that the imageing sensor exposure obtains in the described camera;
In presetting database, obtain the brightness value that is associated with described exposure voltage;
The brightness value that described and described exposure voltage is associated is defined as the brightness value of described camera present position.
2. the method for claim 1 is characterized in that, before described startup camera, also comprises:
The incidence relation of the described exposure voltage of storage and described brightness value in described presetting database.
3. method as claimed in claim 1 or 2 is characterized in that, the exposure voltage that the imageing sensor exposure obtains in the described camera of described detection comprises:
Detect the exposure voltage that the exposure of imageing sensor central area obtains in the described camera.
4. method as claimed in claim 1 or 2 is characterized in that, also comprises:
Judge whether described brightness value is in the default illumination threshold scope;
In described brightness value is in described default illumination threshold scope, point out described brightness value normal;
When described brightness value greater than described default illumination threshold range limit, point out described brightness value excessive;
When described brightness value less than described default illumination threshold scope lower limit, point out described brightness value too small.
5. method as claimed in claim 4 is characterized in that, described judge whether described brightness value is in the default illumination threshold scope before, described method also comprises:
Detect the current illumination photometry scene that the user arranges;
Determine the described default illumination threshold scope corresponding with described current illumination photometry scene.
6. an illumination photometry device is characterized in that, comprising:
Start unit is used for starting camera, and described camera places the position towards light source;
The first detecting unit, the exposure voltage that obtains for detection of imageing sensor exposure in the described camera;
Acquiring unit is used for obtaining the brightness value that is associated with described exposure voltage in presetting database;
The first determining unit is used for the brightness value that described and described exposure voltage is associated is defined as the brightness value of described camera present position.
7. device as claimed in claim 6 is characterized in that, also comprises:
Storage unit is used for the incidence relation at the described presetting database described exposure voltage of storage and described brightness value.
8. such as claim 6 or 7 described devices, it is characterized in that the exposure voltage that described the first detecting unit specifically obtains for detection of imageing sensor central area exposure in the described camera.
9. such as claim 6 or 7 described devices, it is characterized in that, also comprise:
Judging unit is used for judging whether described brightness value is in the default illumination threshold scope;
The first Tip element is used for being in the described default illumination threshold scope when described brightness value, points out described brightness value normal;
The second Tip element is used for working as described brightness value greater than described default illumination threshold range limit, points out described brightness value excessive;
The 3rd Tip element is used for working as described brightness value less than described default illumination threshold scope lower limit, points out described brightness value too small.
10. device as claimed in claim 9 is characterized in that, described device also comprises:
The second detecting unit is for detection of the current illumination photometry scene of user's setting;
The second determining unit is used for determining the described default illumination threshold scope corresponding with described current illumination photometry scene.
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| CN201210504948.1A CN103017896B (en) | 2012-11-29 | 2012-11-29 | Illumination photometry method and illumination photometry device |
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| CN201210504948.1A CN103017896B (en) | 2012-11-29 | 2012-11-29 | Illumination photometry method and illumination photometry device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101719A (en) * | 2016-02-19 | 2017-08-29 | 富泰华工业（深圳）有限公司 | Printing opacity detection device |
| CN108871565A (en) * | 2018-06-27 | 2018-11-23 | 昆山仕优威电子科技有限公司 | A kind of light energy detection device |
| CN109100118A (en) * | 2018-07-24 | 2018-12-28 | 广州柏曼光电科技有限公司 | Test of light source method and system |
| CN109932056A (en) * | 2019-03-20 | 2019-06-25 | 深圳市康康网络技术有限公司 | Illumination photometry method, user equipment, detection system and storage medium |
| CN110057549A (en) * | 2019-04-08 | 2019-07-26 | 深圳市华星光电技术有限公司 | A kind of light illumination detection method and system |
| CN110346116A (en) * | 2019-06-14 | 2019-10-18 | 东南大学 | A kind of scene illumination calculation method based on Image Acquisition |
| WO2021147931A1 (en) * | 2020-01-21 | 2021-07-29 | 上海掌门科技有限公司 | Method and device for detecting scene light |
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| CN202009440U (en) * | 2011-01-27 | 2011-10-12 | 深圳市通宝莱科技有限公司 | Camera |
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| CN101608950A (en) * | 2009-07-21 | 2009-12-23 | 宁书存 | Luminance detector of universal CCD camera |
| CN202009440U (en) * | 2011-01-27 | 2011-10-12 | 深圳市通宝莱科技有限公司 | Camera |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101719A (en) * | 2016-02-19 | 2017-08-29 | 富泰华工业（深圳）有限公司 | Printing opacity detection device |
| CN108871565A (en) * | 2018-06-27 | 2018-11-23 | 昆山仕优威电子科技有限公司 | A kind of light energy detection device |
| CN109100118A (en) * | 2018-07-24 | 2018-12-28 | 广州柏曼光电科技有限公司 | Test of light source method and system |
| CN111707453A (en) * | 2018-07-24 | 2020-09-25 | 广州柏曼光电科技有限公司 | Light source testing method and system |
| CN109932056A (en) * | 2019-03-20 | 2019-06-25 | 深圳市康康网络技术有限公司 | Illumination photometry method, user equipment, detection system and storage medium |
| CN110057549A (en) * | 2019-04-08 | 2019-07-26 | 深圳市华星光电技术有限公司 | A kind of light illumination detection method and system |
| CN110057549B (en) * | 2019-04-08 | 2021-06-01 | Tcl华星光电技术有限公司 | Light source illumination detection method and system |
| CN110346116A (en) * | 2019-06-14 | 2019-10-18 | 东南大学 | A kind of scene illumination calculation method based on Image Acquisition |
| WO2021147931A1 (en) * | 2020-01-21 | 2021-07-29 | 上海掌门科技有限公司 | Method and device for detecting scene light |
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: OPPO Guangdong Mobile Communications Co., Ltd. Address before: Changan town in Guangdong province Dongguan 523841 usha Beach Road No. 18 Patentee before: Guangdong Opel Mobile Communications Co., Ltd. |