CN212163491U

CN212163491U - Automatic day and night switching and quick automatic exposure camera device

Info

Publication number: CN212163491U
Application number: CN202020919008.9U
Authority: CN
Inventors: 张�浩
Original assignee: Hefei Ingenic Technology Co ltd
Current assignee: Hefei Ingenic Technology Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2020-12-15
Anticipated expiration: 2030-05-27

Abstract

The utility model provides a camera device capable of automatically switching day and night and realizing rapid automatic exposure, which comprises a camera, a light sensor and a processor, wherein the camera and the light sensor are respectively connected with the processor, and the light sensor is a photosensitive device sensitive to low illumination; a second optical sensor connected with the processor is additionally arranged on the hardware circuit; the second light sensor is a photosensitive device sensitive to middle and high light; the processor reads the photosensitive value of the second optical sensor through the second optical sensor and sets initial automatic exposure parameters; and after the processor receives the image or video data obtained and sent by the camera, generating final automatic exposure parameters on the basis of the set initial automatic exposure parameters according to the brightness of the image or video. Through a simple increase second light sensor, can realize short-term test environment light intensity when short-term test day night state, make camera device shorten the automatic exposure convergence time.

Description

Automatic day and night switching and quick automatic exposure camera device

Technical Field

The utility model relates to an image pickup field, in particular to automatic switching and quick automatic exposure's camera device day and night.

Background

With the rapid development of computer technology, especially in the field of image capturing, in particular, day and night mode switching methods and apparatuses, and automatic exposure imaging apparatuses in the prior art are becoming increasingly demanded. Particularly, a camera device which needs to rapidly map, such as a battery-type low-power-consumption camera product, is in a standby state (power down of a main control SOC system) at ordinary times, and needs to rapidly map or video once awakened, and needs to rapidly judge a day and night state and ambient light intensity (automatic exposure parameter setting).

The day and night mode automatic switching is one of the necessary functions of the front-end camera device. The front-end camera device can determine whether a day mode or a night mode is adopted currently according to factors such as illumination intensity or image quality in a scene, and automatically switch the day and night mode when the mode is determined to be changed.

The image pickup device may be configured to use different filters corresponding to different modes. For example, an IRCut filter can be used in the daytime mode, and color reproducibility of an image is preferentially ensured; the light filter that can use the full transmission in the mode of night promotes the sensitivity of camera night.

The current camera devices use a single photosensitive unit to check the ambient light intensity, and the ambient light intensity is used as a basis for judging day and night switching. As disclosed in the technical solution of CN110225257A utility model application, see fig. 1.

However, the above prior art has disadvantages in that:

1. only a single photosensitive detection unit is used as a data source for day and night switching judgment detection;

2. a single photosensitive cell does not facilitate rapid auto-exposure; if the single photosensitive unit is used for automatic exposure, the problem of inaccurate low light intensity detection can occur, and the day and night switching function is affected.

Further, technical terms commonly used in the prior art are as follows:

automatic exposure: the camera device can automatically adjust exposure according to the ambient brightness, so that the image or video is suitable for human eyes to observe and is not too bright or too dark.

Automatic exposure convergence time: the processing unit starts exposure parameter adjustment and finishes parameter setting.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model aims to provide a: through a simple increase second light sensor, can realize short-term test environment light intensity when short-term test day night state, make camera device shorten the automatic exposure convergence time.

The camera device comprises a camera, an optical sensor and a processor, wherein the camera and the optical sensor are respectively connected with the processor, and the optical sensor is a photosensitive device sensitive to low light; a second optical sensor connected with the processor is additionally arranged on the hardware circuit; the second light sensor is a photosensitive device sensitive to middle and high light; the processor reads the photosensitive value of the second optical sensor through the second optical sensor and sets initial automatic exposure parameters; and after the processor receives the image or video data obtained and sent by the camera, generating final automatic exposure parameters on the basis of the set initial automatic exposure parameters according to the brightness of the image or video.

The optical sensor is used for judging day and night modes and controlling the switching of the optical filter of the camera through the processor, the photosensitive value of the optical sensor is read after the processor is powered on, and the optical filter of the camera is accurately set.

The photosensitive device sensitive to medium and high illumination enables the second light sensor to detect the current light intensity in the working environment range of the camera device in the whole course.

The low-light sensitive photosensitive device enables the light sensor to be sensitive to light intensity below 10 LUX.

The processor may be further connected to one of: a memory for storing data, a transmission device for communication functions, and other input-output devices.

The number of the processors can be one or more; the optical sensors may be 2 or more groups.

Therefore, the camera device only additionally adds an optical sensor on a hardware circuit, so that the operation time of the original processor is reduced, the working efficiency of the processor is improved, the structure is simple, the improvement is convenient, and the cost is low. The following advantages are specifically summarized:

1. the function basically same as that of the prior art can be realized only by adding the optical sensor and setting different sensitive intensities for different light intensity intervals without excessive complicated algorithm participation;

2. different characteristic light sensors are responsible for different functions: day and night switching and automatic exposure improve the operation efficiency of the device and save time;

3. the automatic exposure parameters are processed in advance by using an additional optical sensor, so that the operation process is simplified, the operation time is shortened, and the efficiency is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.

Fig. 1 is a schematic diagram of a prior art apparatus.

Fig. 2 is a schematic structural diagram of the device of the present invention.

Fig. 3 is a light intensity diagram of the first optical sensor according to the present invention.

Detailed Description

In order to clearly understand the technical contents and advantages of the present invention, the present invention will now be described in further detail with reference to the accompanying drawings.

As shown in fig. 2, the utility model relates to a camera device capable of automatic day and night switching and fast automatic exposure, which comprises a camera 102, an optical sensor 103 and a processor 101, wherein the camera 102 and the optical sensor 103 are respectively connected with the processor 101, and the optical sensor 103 is a photosensitive device sensitive to low light; a second light sensor 104 connected with the processor 101 is additionally arranged on the hardware circuit; the second light sensor 104 is a photosensitive device sensitive to middle and high light; the processor 101 reads the photosensitive value thereof through the connected second light sensor 104 and sets a preliminary automatic exposure parameter; after the processor 101 receives the image or video data obtained and sent by the camera 102, the final automatic exposure parameters are generated based on the set preliminary automatic exposure parameters according to the brightness of the image or video.

The optical sensor 103 is used for judging day and night modes and controlling the switching of the optical filter of the camera 102 through the processor 101, and the processor 101 reads the photosensitive value of the optical sensor after being powered on and accurately sets the optical filter of the camera 102.

The camera 102 includes a first filter 1021, a second filter 1022, and a filter switching mechanism 1023, wherein the first filter 1021 has an infrared cut-off characteristic, the second filter 1022 has an infrared transmission characteristic, and the filter switching mechanism 1023 performs switching between the first filter 1021 and the second filter 1022 according to a current daytime/nighttime mode switched by the processor 101.

When the processor 101 determines that the current mode is daytime and the night mode needs to be switched to the daytime mode according to the photosensitive value of the optical sensor 103, the currently operating optical filter is switched from the second optical filter 1022 to the first optical filter 1021; when the processor 101 determines that the current mode is the night and the day mode needs to be switched to the night mode according to the light sensitivity value of the light sensor 103, the currently operating filter is switched from the first filter 1021 to the second filter 1022.

The medium-high light sensitive photosensitive device enables the second light sensor 104 to detect the current light intensity in the working environment range of the camera device in the whole course.

The low-light sensitive photosensitive device makes the light sensor 103 sensitive to light intensities below 10 LUX.

The processor 101 may also be connected to one of: a memory 105 for storing data, a transmission device 107 for communication functions, and other input-output devices 106.

The number of the processors 101 may also be one or more.

The utility model can be further explained as follows:

in the imaging device of the scheme, 2 or more groups of optical sensors are used on a hardware circuit. The selected light sensor has different sensitive intensity to the light intensity of different intervals. See fig. 2, wherein:

the light sensor 103 is chosen to be a light sensitive device that is very sensitive to low light, as shown in fig. 3. The optical sensor is very sensitive to light intensity below 10LUX, so that the processor 101 can judge day and night switching very conveniently, and the processor 101 can accurately set the optical filter in advance.

The second photosensor 104: the light sensing device sensitive to medium and high illumination is selected (the light intensity in the working environment range of the camera device can be detected in the whole process), so that the processor 101 detects the current ambient light intensity (the actual light intensity is in a small range due to the influence of the detection precision of the photosensitive sensor detection module).

The processor 101: after the processor is powered on, the values of the light sensor 103 and the second light sensor 104 are read and processed for the first time. Judging whether the current day or night is the day or the night according to the value of the optical sensor 103, and setting a camera optical filter; the auto exposure parameters are set by the second light sensor 104 values. When the system is started to the image or the video, fine adjustment is carried out on the basis of the previously set automatic exposure parameters according to the image brightness, so that the time for automatic exposure convergence can be obviously shortened (compared with the case that the automatic exposure parameters are not set in advance through the second light sensor).

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A camera device capable of automatically switching day and night and achieving quick automatic exposure comprises a camera (102), an optical sensor (103) and a processor (101), wherein the camera (102) and the optical sensor (103) are respectively connected with the processor (101), and the optical sensor (103) is a photosensitive device sensitive to low light; the system is characterized in that a second optical sensor (104) connected with the processor (101) is additionally arranged on the hardware circuit; the second light sensor (104) is a photosensitive device sensitive to medium-high light; the processor (101) reads the photosensitive value of the second light sensor (104) and sets a preliminary automatic exposure parameter; and after the processor (101) receives the image or video data obtained and sent by the camera (102), generating final automatic exposure parameters on the basis of the set initial automatic exposure parameters according to the brightness of the image or video.

2. The camera device for automatic day and night switching and fast automatic exposure according to claim 1, wherein the optical sensor (103) is used for judging day and night modes and controlling the switching of the optical filter of the camera (102) through the processor (101), and the processor (101) reads the photosensitive value of the optical sensor after being powered on and accurately sets the optical filter of the camera (102).

3. The camera apparatus according to claim 1 or 2, wherein the camera (102) comprises a first filter (1021), a second filter (1022), and a filter switching mechanism (1023), the first filter (1021) has an infrared cut-off characteristic, the second filter (1022) has an infrared transmission characteristic, and the filter switching mechanism (1023) performs switching between the first filter (1021) and the second filter (1022) according to a current day and night mode switched by the processor (101).

4. The camera device with automatic day and night switching and fast automatic exposure as claimed in claim 1, wherein the photosensitive device with medium and high light sensitivity enables the second light sensor (104) to detect the current light intensity in the range of the working environment of the camera device in the whole course.

5. The imaging apparatus for automatic day and night switching and fast automatic exposure according to claim 1, wherein the low-light-sensitivity photosensitive device makes the light sensor (103) sensitive to light intensity of 10LUX or less.

6. The imaging apparatus for automatic day and night switching and fast automatic exposure according to claim 1, wherein the processor (101) is further connected to one of: a memory (105) for storing data, a transmission device (107) for communication functions, and other input-output devices (106).

7. The camera device for automatic day and night switching and fast automatic exposure according to claim 1, wherein the number of the processors is one or more.

8. The imaging device for automatic day and night switching and fast automatic exposure according to claim 1, wherein the number of the optical sensors is 2 or more.