CN112415831A - Optical compensation image acquisition device and method - Google Patents
Optical compensation image acquisition device and method Download PDFInfo
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- CN112415831A CN112415831A CN202010930673.2A CN202010930673A CN112415831A CN 112415831 A CN112415831 A CN 112415831A CN 202010930673 A CN202010930673 A CN 202010930673A CN 112415831 A CN112415831 A CN 112415831A
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- compensation
- material layer
- luminescent material
- light
- brightness
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
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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
-
- 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
- H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components
Abstract
The invention discloses an optical compensation image acquisition device and a method, wherein the device comprises: a lens, the outer surface of which is provided with a conversion luminescent material layer; the optical filter is arranged on the inner surface of the lens corresponding to the position of the conversion luminescent material layer, wherein the color which can be excited after the conversion luminescent material layer is irradiated by non-visible light is the same as the color of the optical filter; and the compensation light emitting unit is used for emitting non-visible light, and the non-visible light sequentially passes through the conversion luminescent material layer and the optical filter to obtain visible light for brightness compensation. According to the invention, through arranging the RGB camera, the brightness compensation of the image can be realized without arranging the IR camera, and the cost is lower. And when the luminance compensation shooting is carried out, the user experience is improved because the non-visible light does not influence the user.
Description
Technical Field
The invention relates to the technical field of imaging, in particular to an optical compensation image acquisition device and method.
Background
With the popularization of electronic devices, electronic devices usually have a shooting function, but the existing electronic devices usually adopt two cameras, namely an RGB (red, green and blue) camera and an IR (infrared) camera. Therefore, the cost is high, and when the existing electronic equipment is used for shooting, if the ambient brightness is low, the flash lamp can be started, so that the influence on surrounding people can be generated; meanwhile, the existing electronic equipment adopts a shooting mode of high dynamic range images when shooting, and in the mode, photos with different brightness are obtained by prolonging exposure time, so that the shooting time is long.
Disclosure of Invention
An object of the embodiments of the present invention is to provide an optical compensation image capturing device and method, which are used to solve the problem of high cost due to the adoption of two cameras in the image capturing device in the prior art.
In order to solve the technical problem, the embodiment of the application adopts the following technical scheme: an optically compensated image capture device comprising:
a lens, the outer surface of which is provided with a conversion luminescent material layer;
the optical filter is arranged on the inner surface of the lens corresponding to the position of the conversion luminescent material layer, wherein the color which can be excited after the conversion luminescent material layer is irradiated by non-visible light is the same as the color of the optical filter;
and the compensation light emitting unit is used for emitting non-visible light, and the non-visible light sequentially passes through the conversion luminescent material layer and the optical filter to obtain visible light for brightness compensation.
Optionally, the compensation light emitting unit includes an infrared light emitting unit.
In order to solve the above problems, the present application provides an optically compensated image capturing method, which is applied to the optically compensated image capturing apparatus described above, the method including the steps of:
converting the invisible light emitted by the compensation light emitting unit based on the conversion luminescent material layer to obtain visible light;
enhancing the visible light obtained by converting the conversion luminescent material layer based on an optical filter to obtain compensation light;
and performing brightness compensation on the target object based on the compensation light to obtain a target image.
Optionally, the method further comprises the following steps:
detecting the brightness of the surrounding environment to obtain an environment brightness value;
determining a compensation light intensity value based on the ambient brightness value;
controlling the luminous intensity of the compensation light emitting unit based on the intensity value of the compensation light.
Optionally, performing luminance compensation on the target object based on the compensation light to obtain the target image, specifically including the following steps:
collecting a first image of a target object without brightness compensation;
compensating the brightness of the target object based on the compensation light to obtain a second image;
obtaining the target image based on the first image and the second image.
Optionally, the method further comprises the following steps:
receiving a first operation of a user;
switching a mode to a brightness compensation mode based on the first operation.
Optionally, the method further comprises the following steps:
establishing a mapping relation between the environment brightness value and the compensation light intensity value;
and constructing a mapping table based on the mapping relation.
Optionally, the determining a compensation light intensity value based on the environment brightness value includes the following steps:
and searching the mapping table based on the environment brightness value to determine a compensation light intensity value corresponding to the environment brightness value. The embodiment of the invention has the beneficial effects that: through set up the conversion luminescent material layer at the surface of camera lens, can convert non-visible light to the visible light of predetermined colour, then utilize the light filter the same with the visible light colour to strengthen, come to carry out luminance compensation to the image from this, the cost is lower, and when carrying out luminance compensation shooting, because be non-visible light, consequently can not exert an influence to the user, has improved user experience.
Drawings
Fig. 1 is a schematic diagram of a positional relationship between a camera and a compensation light emitting unit of an optical compensation image capturing device according to an embodiment of the present invention.
FIG. 2 is a schematic diagram illustrating a positional relationship between a lens and a conversion luminescent material layer and a filter according to an embodiment of the present invention;
FIG. 3 is a flowchart of an optically compensated image capture method according to yet another embodiment of the present invention.
Detailed Description
Various aspects and features of the present application are described herein with reference to the drawings.
It will be understood that various modifications may be made to the embodiments of the present application. Accordingly, the foregoing description should not be construed as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with a general description of the application given above and the detailed description of the embodiments given below, serve to explain the principles of the application.
These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.
It should also be understood that, although the present application has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of application, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the application of unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.
An embodiment of the present invention provides an optical compensation image acquiring apparatus, as shown in fig. 1 and 2, including: the camera comprises a camera 1 and a compensation light emitting unit 2, wherein the camera comprises a lens 11, and a plurality of lenses 11 can be arranged in the camera;
the outer surface of the lens 11 is provided with a conversion luminescent material layer 3;
the optical filter 4 is arranged on the inner surface of the lens corresponding to the position of the conversion luminescent material layer, wherein the color which can be excited after the conversion luminescent material layer is irradiated by non-visible light is the same as the color of the optical filter;
and the compensation light emitting unit 2 is used for emitting non-visible light, and the non-visible light sequentially passes through the conversion luminescent material layer and the optical filter to obtain visible light for compensating the brightness.
In this embodiment, the compensation light emitting unit 2 may be an infrared light emitting unit. The conversion luminescent material layer 3 may be an up-conversion luminescent material layer, and the corresponding relationship between the up-conversion luminescent material layer 3 and the color of the filter is shown in table 1 below.
Table 1:
that is, in the present embodiment, the NaYF may be sprayed on the outer surface of the lens 11 near the object to be photographed4And Yb and Er are mixed to form a mixed material, so that an up-conversion luminescent material layer 3 capable of converting infrared light into green is formed, and then a green optical filter 4 is arranged on the inner surface of the lens 2 far away from the object to be shot, corresponding to the position of the up-conversion luminescent material layer. Or NaGdF can be sprayed on the outer surface of the lens 11 close to the object to be shot4And Tm, so as to form an upconversion luminescent material layer 3 capable of converting infrared light into blue, and then a blue filter 4 is arranged on the inner surface of the lens 2 far away from the object to be photographed, corresponding to the upconversion luminescent material layer. Ho can be sprayed on the outer surface of the lens 11 close to the object to be shot so as to form an up-conversion luminescent material layer 3 capable of converting infrared light into red, and then a red color filter 4 is arranged on the inner surface of the lens 2 far away from the object to be shot, corresponding to the up-conversion luminescent material layer. In a specific implementation process, different up-conversion luminescent materials can be coated on the surfaces outside different lenses in the same image pickup device, and filters with corresponding colors can be arranged on the inner surfaces of the lenses according to the corresponding relationship between the up-conversion luminescent material layers and the colors of the filters in the table 1.
In this embodiment, the up-conversion luminescent material layer is arranged on the outer surface of the camera lens, so that the non-visible light can be converted into the visible light with a predetermined color, and then the visible light with the same color as the visible light is utilized to be enhanced, thereby performing brightness compensation on the image, and therefore, an infrared camera does not need to be additionally arranged, thereby reducing the cost, and when the brightness compensation shooting is performed, the non-visible light does not affect the user, and the user experience is improved.
Another embodiment of the present invention provides an optically compensated image capturing method, which is applied to the optically compensated image capturing apparatus described above, as shown in fig. 3, and includes the following steps:
step S101, converting the invisible light emitted by the compensation light emitting unit based on the conversion luminescent material layer to obtain visible light;
step S102, strengthening the visible light obtained by converting the conversion luminescent material layer based on an optical filter to obtain compensation light;
and S103, performing brightness compensation on the target object based on the compensation light to obtain a target image.
In the embodiment of the invention, when the target object is shot, the non-visible light is converted into the visible light by utilizing the light emitting layer arranged on the outer surface of the lens close to the target object, and then the visible light is enhanced by utilizing the optical filter arranged on the inner surface of the lens far away from the target object, so that the brightness compensation is carried out on the shot target object, and the shooting effect is clearer.
Another embodiment of the present invention provides an optically compensated image acquisition method, including the steps of:
step S201, detecting the brightness of the surrounding environment to obtain an environment brightness value; determining a compensation light intensity value based on the ambient brightness value; controlling a luminous intensity of the compensation light emitting unit based on an intensity value of the compensation light;
in the specific implementation process of the step, the compensation light intensity to be compensated for different environmental luminances can be determined according to actual experience, the environmental luminance values corresponding to the different environmental luminances and the compensation light intensity values corresponding to the different compensation light intensities are set at the same time, and then the mapping relationship between the environmental luminance values and the compensation light intensity values is established to construct and obtain the mapping table. Thus, after the ambient brightness is detected, the ambient brightness value is determined, and then the compensation light intensity value corresponding to the ambient brightness value can be determined by looking up a table according to the ambient brightness value; then, a compensation light intensity corresponding to the compensation light intensity value is further determined, whereby the light emission intensity of the compensation light emitting unit can be controlled.
Step S202, converting the invisible light emitted by the compensation light emitting unit based on the conversion luminescent material layer to obtain visible light;
step S203, based on the optical filter, the visible light obtained by converting each conversion luminescent material layer is strengthened to obtain compensation light;
and step S204, performing brightness compensation on the target object based on the compensation light to obtain a target image.
In the present embodiment, when it is detected that the ambient brightness is very dark, the tube brightness value of the compensation light may be determined to be the maximum, and then the light emission intensity of the compensation light transmitting unit may be controlled to be the maximum. For another example, when it is detected that the ambient brightness is generally dark, the tube brightness value of the compensation light may be determined to be medium, and then the light emission intensity of the compensation light transmitting unit may be controlled to be medium.
In the embodiment, the compensation light brightness value needing to be compensated is determined by determining the brightness value of the surrounding environment, and the light intensity of the emission compensation light emitting unit can be dynamically adjusted according to the actual shooting environment, so that the light brightness compensation is more reasonable, and the shooting effect is improved.
Another embodiment of the present invention provides an optical compensation image acquiring method, including the steps of:
step S301, collecting a first image of a target object without brightness compensation;
step S302, converting the invisible light emitted by the compensation light emitting unit based on the conversion luminescent material layer to obtain visible light;
step S303, based on the optical filter, strengthening the visible light obtained by converting the conversion luminescent material layer to obtain compensation light;
and step S304, compensating the brightness of the target object based on the compensation light, and obtaining a second image.
Step S305, obtaining the target image based on the first image and the second image.
In this embodiment, the final target image is obtained based on the first image subjected to the luminance compensation and the second image not subjected to the luminance compensation, so that the final image can be made clearer.
In this embodiment, when the ambient brightness is low, the first shot picture without brightness compensation reflects color information, but its brightness is insufficient. The second photo after brightness compensation is brighter but the color is somewhat distorted, so that the two photos are combined and analyzed by a predetermined algorithm to synthesize a target picture which can reflect color information and has better brightness. Similarly, when the brightness of the surrounding environment is brighter, the details of the highlight part of the first shot picture which is not subjected to brightness compensation are clearer, and the details of the shadow part are not clearer; and the second photo can show the details of the shadow part under the action of the infrared light-emitting diode IR LED, and the details of the highlight part become unclear, so that the highlight part of the first photo and the shadow part of the second photo can be synthesized through a preset algorithm to obtain the target photo.
In an implementation process of this embodiment, a preset mapping table may be specifically searched according to a brightness value of an ambient environment to obtain and determine a compensation light intensity value corresponding to the environment brightness value, then a compensation light intensity interval is determined based on the compensation light intensity value, and luminance compensation is performed by using a plurality of compensation light intensities in the interval, so as to obtain a plurality of second images under different compensation light intensities. Then, the target image is obtained based on each second image and the first image, and the shooting definition is improved.
Another embodiment of the present invention provides an optical compensation image acquiring method, including the steps of:
step S401, receiving a first operation of a user; switching a mode to a brightness compensation mode based on the first operation.
In this step, the first operation is that the user double-clicks the target button, or clicks a predetermined area of the shooting device, for example, a predetermined area of a display screen of a mobile phone. Through these operations, the user can switch the optically-compensated image capturing apparatus from a normal shooting mode in which the luminance compensation is not required to be performed to an operating mode in which the luminance compensation is required to be performed. When shooting is performed in the luminance compensation mode, the optical compensation image obtaining device turns on the compensation light emitting unit to perform luminance compensation.
Step S402, collecting a first image of a target object without brightness compensation;
in this step, the target object may be photographed by receiving a second operation of the user. For example, the second operation refers to the user clicking a shooting button or double-clicking a shooting button. A user photographs a target object by touching/pressing a photographing button; when the user touches/presses the shooting button, the compensation light emitting unit can be turned off for shooting to obtain a first image without brightness compensation.
Step S403, converting the invisible light emitted by the compensation light emitting unit based on the conversion luminescent material layer to obtain visible light; enhancing the visible light obtained by the conversion of the conversion luminescent material layer based on an optical filter to obtain compensation light for performing luminance compensation on the target object; and shooting the target object based on the compensation light to obtain a second image.
In this step, after the first image is obtained, the compensation light emitting unit may be turned on for a predetermined time and then photographed, thereby obtaining at least one second image subjected to luminance compensation.
When obtaining the plurality of second images, the following method may be specifically adopted: and searching a preset mapping table according to the brightness value of the surrounding environment to obtain and determine a compensation light intensity value corresponding to the environment brightness value, then determining a compensation light intensity interval based on the compensation light intensity value, and performing light brightness compensation by using a plurality of compensation light intensities in the interval respectively to obtain a plurality of second images under different compensation light intensities.
Step S404, obtaining the target image based on the first image and the second image.
In this embodiment, by switching the shooting mode according to the first target operation, the power consumption problem caused by the real-time turning on of the compensation light emitting unit can be avoided.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (8)
1. An optically compensated image capture device, comprising:
a lens, the outer surface of which is provided with a conversion luminescent material layer;
the optical filter is arranged on the inner surface of the lens corresponding to the position of the conversion luminescent material layer, wherein the color which can be excited after the conversion luminescent material layer is irradiated by non-visible light is the same as the color of the optical filter;
and the compensation light emitting unit is used for emitting non-visible light, and the non-visible light sequentially passes through the conversion luminescent material layer and the optical filter to obtain visible light for brightness compensation.
2. The optically compensated image capture device of claim 1, wherein the compensation light emitting unit comprises an infrared light emitting unit.
3. An optically compensated image acquisition method applied to the optically compensated image acquisition apparatus according to claim 1 or 2, characterized by comprising the steps of:
converting the invisible light emitted by the compensation light emitting unit based on the conversion luminescent material layer to obtain visible light;
enhancing the visible light obtained by converting the conversion luminescent material layer based on an optical filter to obtain compensation light;
and performing brightness compensation on the target object based on the compensation light to obtain a target image.
4. The method of claim 3, further comprising the steps of:
detecting the brightness of the surrounding environment to obtain an environment brightness value;
determining a compensation light intensity value based on the ambient brightness value;
controlling the luminous intensity of the compensation light emitting unit based on the intensity value of the compensation light.
5. The method according to claim 3, wherein the luminance compensation of the target object based on the compensation light to obtain the target image comprises the following steps:
collecting a first image of a target object without brightness compensation;
compensating the brightness of the target object based on the compensation light to obtain a second image;
obtaining the target image based on the first image and the second image.
6. The method of claim 3, further comprising the steps of:
receiving a first operation of a user;
switching a mode to a brightness compensation mode based on the first operation.
7. The method of claim 4, further comprising the steps of:
establishing a mapping relation between the environment brightness value and the compensation light intensity value;
and constructing a mapping table based on the mapping relation.
8. The method of claim 7, wherein said determining a compensated light intensity value based on said ambient brightness value comprises the steps of:
and searching the mapping table based on the environment brightness value to determine a compensation light intensity value corresponding to the environment brightness value.
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| CN1427623A (en) * | 2001-12-18 | 2003-07-02 | 三星电子株式会社 | Apparatus for increasing brightness of projection television |
| CN102591101A (en) * | 2012-02-07 | 2012-07-18 | 广东美的电器股份有限公司 | Camera supplementary lighting device and control method thereof |
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