WO2020057349A1

WO2020057349A1 - Ultra low illumination night vision method and system and high-definition photographing apparatus

Info

Publication number: WO2020057349A1
Application number: PCT/CN2019/103771
Authority: WO
Inventors: 张平
Original assignee: 深圳市九洲电器有限公司
Priority date: 2018-09-21
Filing date: 2019-08-30
Publication date: 2020-03-26
Also published as: CN109151390A; CN109151390B

Abstract

The embodiments of the present application relate to the technical field of intelligent security protection and disclosed are an ultra low illumination night vision method and system and a high-definition photographing apparatus, wherein the ultra low illumination night vision method is applied to a high-definition photographing apparatus and the high-definition photographing apparatus comprises an infrared laser camera and a white light camera. The method comprises: acquiring monitoring image information within a monitoring range of the high-definition photographing apparatus; according to the monitoring image information, determining a working mode of the high-definition photographing apparatus, wherein the working mode comprises a white light working mode or an infrared laser working mode; and according to the white light working mode or the infrared laser working mode, switching a working mode of the infrared laser camera or the white light camera. Through the above-mentioned method, the embodiments of the present application can solve the technical problem of fuzzy monitoring image information easily appearing in a single monitoring mode of current video monitoring, implement intelligently adjusting a working mode and improve the quality of video monitoring.

Description

Ultra-low illumination night vision method and system and high-definition camera device

Technical field

The invention relates to the field of intelligent security technology, and in particular, to an ultra-low-illumination night vision method and system, and a high-definition camera device.

Background technique

In recent years, high-definition cameras have been increasingly used for high-definition video image surveillance in complex backgrounds such as public safety, parking management, intelligent transportation, and comprehensive emergency response. Illumination intensity, referred to as illuminance for short, refers to the unit that refers to the luminous flux of visible light received per unit area. The magnitude of the illumination intensity is usually characterized by the illuminance value. Under different light intensities, the imaging of high-definition cameras will have a large difference. It is generally believed that the illumination value below 0.0001 Lux is called ultra-low illumination. Under ultra-low illumination, ordinary cameras cannot obtain the clarity in the monitoring range. Image data.

At present, video surveillance is generally based on a single surveillance mode, and ordinary cameras cannot work in an ultra-low-light environment, which often leads to failure to obtain corresponding video data, resulting in blurred images in surveillance, affecting the quality of video surveillance, and easily Causes subsequent video forensics difficulties.

Based on this, the present invention proposes an ultra-low-illumination night vision method, system and high-definition camera device, which solves the technical problem that the current video surveillance single surveillance mode is prone to blurring of the monitored image information, realizes intelligent adjustment of the operating mode, and improves the quality of video surveillance .

Summary of the Invention

The embodiment of the present invention aims to provide an ultra-low-illumination night vision method, system and high-definition camera device, which solves the technical problem that the current single video monitoring mode is prone to blurring of the monitored image information, realizes intelligent adjustment of the working mode and improves The quality of video surveillance.

To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

In a first aspect, an embodiment of the present invention provides an ultra-low-illumination night vision method, which is applied to a high-definition camera device. The high-definition camera device includes an infrared laser camera and a white light camera. The method includes:

Acquiring monitoring image information within a monitoring range of the high-definition camera device;

Determining a working mode of the high-definition camera according to the monitored image information, the working mode includes a white light working mode or an infrared laser working mode;

According to the white light working mode or the infrared laser working mode, the working state of the infrared laser camera or the white light camera is switched.

In some embodiments, the monitoring image information includes: brightness information of the monitoring image,

Determining, according to the monitoring image information, a working mode of the high-definition camera device, the working mode including a white light working mode or an infrared laser working mode, including:

If the brightness of the monitored image is lower than a preset brightness threshold or fluctuates within a preset threshold range, determining that the working mode of the high-definition camera device is a white light working mode,

The switching the working state of the infrared laser camera or the white light camera is specifically:

Turn on the white light camera and enter the working state.

In some embodiments, the monitoring image information further includes: an environmental brightness of the monitoring image,

The method further includes:

Adjusting the light emitting power of the white light camera according to the ambient brightness of the monitoring image.

In some embodiments, the surveillance image information includes: distance information of the surveillance image,

If the distance of the monitored image exceeds a preset distance threshold, determining that the working mode of the high-definition camera device is an infrared laser working mode,

Turn on the infrared laser camera and enter the working state.

In some embodiments, the monitoring image information further includes: exposure degrees of different regions of the monitoring image,

The method further includes:

Adjust the light emitting power of the infrared laser camera according to the exposure of different areas of the monitoring image.

In a second aspect, an embodiment of the present invention provides an ultra-low-illumination night vision system, where the system includes:

An obtaining unit, configured to obtain monitoring image information within a monitoring range of the high-definition camera device;

A determining unit, according to the monitoring image information, determining a working mode of the high-definition camera device, the working mode including a white light working mode or an infrared laser working mode;

The switching unit is configured to switch the working state of the infrared laser camera or the white light camera according to the white light working mode or the infrared laser working mode.

In some embodiments, the monitoring image information includes: brightness information of the monitoring image, and the determining unit is specifically configured to:

If the brightness of the monitored image is lower than a preset brightness threshold, or fluctuates within a preset threshold range, it is determined that the working mode of the high-definition camera is a white light working mode.

In some embodiments, the monitoring image information includes: distance information of the monitoring image, and the determining unit is specifically configured to:

If the distance of the monitoring image exceeds a preset distance threshold, it is determined that the working mode of the high-definition camera device is an infrared laser working mode.

According to a third aspect, an embodiment of the present invention provides a high-definition camera device, including:

At least one processor; and

A memory connected in communication with the at least one processor; wherein,

The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor, so that the at least one processor can execute the above-mentioned ultra-low-illumination night vision method.

According to a fourth aspect, an embodiment of the present invention further provides a non-volatile computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions. When the computer-executable instructions are executed by a high-definition camera, The high-definition imaging device is caused to execute the above-mentioned ultra-low-illumination night vision method.

A beneficial effect of the embodiment of the present invention is that, in a case different from the prior art, an ultra-low-illumination night vision method provided by an embodiment of the present invention is applied to a high-definition camera, which includes an infrared laser camera and white light. A camera, the method comprising: acquiring monitoring image information within a monitoring range of the high-definition camera device; and determining a working mode of the high-definition camera device according to the monitoring image information, the working mode including a white light working mode or an infrared laser working Mode; switching the working state of the infrared laser camera or white light camera according to the white light working mode or the infrared laser working mode.

BRIEF DESCRIPTION OF THE DRAWINGS

One or more embodiments are exemplified by the pictures in the accompanying drawings. These exemplary descriptions do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the drawings in the drawings do not constitute a limitation on scale.

FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present invention; FIG.

2 is a schematic flowchart of an ultra-low-illumination night vision method according to an embodiment of the present invention;

3 is a schematic structural diagram of an ultra-low-illumination night vision system according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a high-definition camera according to an embodiment of the present invention.

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in FIG. 1, FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present invention;

The monitoring terminal 110 is connected to at least one high-definition camera device 130 through a communication network 120. The high-definition camera device 130 is used to monitor a certain monitoring area 140, and multiple high-definition camera devices 130 can simultaneously perform monitoring on the monitoring area 140. Video surveillance, so as to achieve multi-angle and multi-directional monitoring, eliminate monitoring dead spots in the monitoring area.

The monitoring terminal 110 is used for presenting the monitoring content of the high-definition camera device 130, for example, a monitoring image or a monitoring video, and real-time display is performed through a display screen of the monitoring terminal 110. It can be understood that the monitoring terminal 110 The display screen of the display screen can be split-screen display, so as to display the monitoring information of the monitoring area at multiple angles, and the number of the split-screen is not less than the number of the high-definition camera devices 130 set in the monitoring area 140.

Wherein, the communication network 120 may be a wireless network, such as WIFI, Bluetooth, etc., through the communication network 120, the communication connection between the monitoring terminal 110 and the plurality of high-definition camera devices 130 may be achieved, and may also The communication network 120 implements data transmission between the monitoring terminal 110 and the plurality of high-definition camera devices 130, for example, sending monitoring content acquired by the plurality of high-definition camera devices 130 to the monitoring terminal 110, so that the monitoring terminal 110 The monitoring terminal 110 presents the monitoring content on a display screen of the monitoring terminal 110 and stores the monitoring content in a database of the monitoring terminal 110.

The high-definition camera 130 is configured to acquire monitoring information in a monitoring area. The high-definition camera 130 includes an infrared laser camera, a white light camera, and an ultra-low-light camera.

Specifically, the infrared laser camera is used to provide a high-brightness infrared laser, so that the camera of the high-definition camera 130 can monitor the video under low illumination. Wherein, the infrared laser camera mainly adopts a synchronous zoom infrared laser fill light technology. As night surveillance requirements continue to increase, infrared lasers are becoming more and more urgent due to their high brightness, long lighting distance, long chip life, high photoelectric conversion rate, and low overall power consumption.

The infrared laser fill light technology has the following advantages:

(1) The infrared laser has high brightness and long lighting distance

At present, the distance for supplementing light using LED infrared lamps is not more than 150 meters, and even with infrared lasers of 2-3W, the effective lighting distance can be easily exceeded 400 meters.

(2) Long chip life

The low-end ordinary LED infrared products have relatively obvious light attenuation due to the limitation of heat treatment and material cost. The infrared laser chip is more stable and reliable. The life of conventional products is generally more than 20,000 hours, and the light decay is less than 10% after 10,000 hours. Using unique temperature control technology, ordinary laser infrared lamps can be at a constant working temperature, and the long life of the product is greatly guaranteed.

(3) High photoelectric conversion rate

The laser's photoelectric conversion efficiency is 3.3 times that of traditional LEDs, 2.7 times that of a single high-power LED, and 2.3 times that of synchronous LED zoom night vision technology. It should be noted that the power consumption of synchronous LED zoom and synchronous laser zoom includes the power consumption of its motor servo system. If this part is removed, this multiple will be greater.

Specifically, the white light camera uses a camera night vision full-color white light technology, a so-called white light camera, which is a new type of camera that uses white light as a light source to supplement light. Similar to infrared cameras, they provide low-light photography at night. Its biggest feature is that white light cameras can also produce color images at night. Compared with infrared cameras, white light cameras have the following incomparable advantages:

(1) Color image: LED white light is a visible light with a color temperature above 5300K, which is close to natural light, and the light color rendering index can reach above 75, so the CCD can easily obtain a color picture with realistic colors. Compared with infrared cameras, laser cameras, thermal imaging technologies, etc., only white light cameras can capture clear color images at 0LUX at night. Realize 24-hour full-color monitoring. No color cast during the day, more vivid colors, more realistic picture, full color at night. As the color information of the night image is added, the picture has a strong sense of hierarchy and higher resolution, which is more conducive to investigation and evidence collection. To some extent, it is avoided due to night vision. Ineffective monitoring results in ineffective monitoring.

(2) Intelligent dimming: Digital light intensity sensors are used instead of ordinary photoresistors to collect external light, and microprocessors perform pulse width modulation (PWM) to achieve intelligent dimming. The strength of the light is determined by the perimeter environment. The darker the external light, the stronger the light. The stronger the external light, the darker the light. Unlike some products, the white light is turned on or off. It is linearly adjustable. The ambient light is always in an optimal range, avoiding the phenomenon that the light is too strong and the flare appears.

(3) Optical design: The high-power LED white light lamp has a unique secondary optical design. The LED white light beam is adjusted to the viewing angle of the lens through a professional optical lens, and there is no light diffusion, which further improves the illumination. effectiveness.

(4) Ultra-long life: The service life of high-power LED white light lamp is as high as 50,000 hours or more. It will not cause premature light decay and affect the night light fill effect.

(5) Lighting function: It has the function of auxiliary lighting, for example, it can be used as a street light at night if it is installed on the outer wall or the gate. There is also a certain deterrent effect. The white light camera has the function of auxiliary lighting and can play the role of street light at night. And its alerting function has a deterrent effect on people with unintended intentions and avoids possible crimes.

(6) Energy saving and power saving: the power of each LED lamp is 1-3 watts, and there are only a few lamps on the camera at most. Power is just over a dozen watts. Real energy savings. High-brightness white LED saves 40% of power consumption compared to infrared, with extremely low heat generation, greatly extending the life of the camera. It not only saves electricity bills for users, but also meets the new global trend of low-carbon environmental protection.

(7) Low-temperature design: The high-thermal-conductivity aluminum-based lamp board and housing are integrated in the assembly process, which can quickly dissipate the heat of the LED chip through the aluminum substrate and the housing to the air.

(8) Constant current power supply: The imported high-performance constant current power management chip is used to make the LED chip always work at a constant current, which solves the light attenuation of the LED chip caused by the increase of the current.

Specifically, the ultra-low-light camera is configured to acquire an image under ultra-low light. Generally speaking, cameras with illuminance values greater than 0.1Lux are called ordinary cameras; cameras with illuminance values ranging from 0.1Lux to 0.01Lux are generally referred to as low-light cameras; and illuminance values ranging from 0.01Lux to 0.001Lux The camera is called a moonlight camera; when the minimum illumination value reaches or falls below 0.0001 Lux, it reaches a starlight ultra-low-light camera. When the illuminance is lower than 0.0001 Lux, ordinary cameras cannot obtain clear images in the surveillance range, which easily leads to the failure to achieve normal video surveillance.

Ultra-low-light cameras have the following advantages:

(1) High stability. The device stability of ultra-low-light cameras is much higher than that of infrared fill-light cameras. Affected by the electromagnetic of the infrared fill light circuit and the heat of the infrared lamp, when the high temperature or long time work, the infrared fill light camera often appears a series of problems such as poor imaging quality and infrared switching failure. Because of this, most of the bayonet cameras need to separate the fill light accessories to ensure the overall stability of the system for a long time.

(2) Energy saving and environmental protection. The low-light camera is in line with the green development theme of low-carbon environmental protection. The rated design power of an ultra-low-light HD gun-type camera using a CMOS sensor is about 5W, while the rated design power of an infrared fill-light HD gun-type camera using a CMOS sensor usually reaches 9W. In this way, the power saving effect of several cameras may not be obvious, but if you encounter large-scale video surveillance projects, especially in recent years, the number of monitoring points carried by the safe city project is increasing, some even reaching tens of thousands Each monitoring point, if calculated based on 1,000 monitoring points and a one-year operating time, will save about 35,000 kilowatt hours of energy consumption for the monitoring system. The ultra-low-light camera is not much different from other camera products in use, so it became the darling in the market as soon as it went on the market. More and more projects and projects are deployed in important areas, especially in hospitals, banks, smart buildings, etc., which are important and sensitive areas that have a large impact on human visual perception and have been in low light for a long time.

Ultra-low-light camera is a hot product in the surveillance industry that has been introduced with the development of semiconductor technology in recent years. At present, it has been widely used in the fields of finance, cultural expo, hotels, office buildings, and residential community property management. As traditional cameras are difficult to meet the requirements of 24-hour continuous monitoring (because it is impossible to turn on the lights 24 hours at any place), new technology ultra-low-light cameras have seized this opportunity and developed rapidly.

The ultra-low-illumination series CCD camera uses the frame accumulation technology, the infrared camera provides surprisingly low brightness performance, and can compose images in almost complete darkness. In these cameras, the concentration of photons on the CCD sensor is 2 to 128 times (1 to 2 seconds) longer than the maximum exposure time (1/60 or 1/50 second) of a conventional CCD infrared camera. As a result, the minimum illumination of the camera to produce a usable image is reduced by 2 to 128 times. Using an ultra-low-light camera with frame accumulation technology, users can see color images under star light conditions (0.0035 Lux), and black and white images under cloudy star light conditions (0.0002 Lux), and scattered backgrounds in cities Light (such as light pollution) is sufficient to produce good color exposure. The ultra-low-light camera can also extend the effective range of using infrared. Using frame cumulative exposure, the range of influence of an infrared light source can be extended by 128 times. If a starlight camera is used, an infrared lamp designed to illuminate a target 10 meters away, its working range Can be extended to 1280 meters. Maximum exposure (frame accumulation rate), AVS series models (PL926 / KL926) are fixed at 4 times, (PX926 / KX926) has a frame accumulation interval of 2 to 128 times, which is set by the user through the on-screen menu display menu. Remember special The extended exposure time also requires a special cooling system to reduce the temperature of the CCD chip to -10C to reduce black current and hinder the image. Similarly, the method of obtaining images under low illumination is to increase the exposure of the CCD in a single frame image through a single frame accumulation of charge, thereby improving the sensitivity of the camera to a single frame image. This method can also obtain a lower illuminance index, but it is necessary to reduce the degree of coherence of the image, so when choosing this camera, please pay attention not to use it with the gimbal as much as possible, otherwise it will cause the phenomenon of losing the picture. There are some other ways to obtain images under low light, but none of them can fundamentally solve the problem of light. In addition, pay attention to several points when choosing to use low-light cameras and infrared lights. First, you must choose the right lens. In order to increase the sensitivity of infrared cameras to infrared lights and scenes, lenses with a large amount of light should be used as much as possible, and when using an automatic aperture or a motorized variable lens, the driving level of the aperture should be set as wide as possible. Because generally with the increase of the focal length of the lens, its light flux will be relatively reduced. When choosing an infrared lamp, leave a certain margin, and pay attention to the nominal index of the infrared lamp. Second, the optional power supply of the infrared lamp should meet the minimum electric power required by it as much as possible, and the irradiation distance is often insufficient. Third, the degree of reflection of the scene to be photographed must be considered. Because infrared rays have the same characteristics as reflection and refraction of visible light, if there is no good reflective environment (such as buildings, fences, signs) around the target scene, certain considerations must be taken. Distance margin.

The monitoring area 140 may be a parking lot, a highway intersection, a traffic lane, a home, a doorway of a community, and the like. By setting a high-definition camera 130 at a certain location, the monitoring range of the high-definition camera 130 is the monitoring area 140. Since the camera of the high-definition camera 130 can be zoomed and there can be more than one high-definition camera 130, Therefore, the monitoring area 140 may be a visible range of at least one high-definition camera device 130, and the high-definition camera device 130 is configured to monitor an image change in the monitoring area 140.

Specifically, an embodiment of the present invention is described in detail below by taking a high-definition camera device as an example.

Example one

Please refer to FIG. 1, which is a schematic flowchart of an ultra-low-illumination night vision method according to an embodiment of the present invention. As shown in FIG. 1, the method is applied to a high-definition camera, such as a high-definition camera, which is used for video surveillance. The high-definition camera includes an infrared laser camera and a white light camera. The method includes:

Step S10: acquiring monitoring image information within a monitoring range of the high-definition camera device;

Specifically, the high-definition camera device is arranged in a monitoring area. There may be multiple high-definition camera devices, and the monitoring area may be a parking lot, a highway intersection, a carriageway, a home, a doorway of a community, and the like. It can be understood that The high-definition camera device corresponds to a monitoring range, and the high-definition camera device can take pictures or videos of the conditions in the monitoring range, thereby obtaining monitoring image information or monitoring video in the monitoring range.

Specifically, the high-definition camera includes an infrared laser camera and a white light camera. It can be understood that an appropriate camera lens can be selected according to the customer's installation environment, monitoring location, and monitoring range. Preferably, the infrared laser camera and the white light camera are both adjustable focus cameras, and the focusing method may be automatic focusing or manual focusing. It can be understood that in a high-definition camera device, the smaller the focal length, the wider the monitoring field of view, but the smaller the image of the object in the picture, the larger the focal length, the narrower the field of view, but the imaging of the object in the picture is clear. Therefore, the corresponding infrared laser camera and / or white light camera can be determined according to the position and size of the monitoring area.

Specifically, the acquiring the monitoring image information in the monitoring range of the high-definition camera device includes: obtaining the brightness information of the monitoring image in the monitoring range of the high-definition camera device, or acquiring the monitoring information in the monitoring range of the high-definition camera device. Environmental brightness of the image, or acquiring distance information of a monitoring image within a monitoring range of the high-definition camera device, or acquiring flow density information of a monitoring image within the monitoring range of the high-definition camera device, or acquiring the high-definition camera device Movement speed information within a monitoring range, or obtaining exposure degrees of different regions of the monitoring image, or obtaining differences between exposure degrees of different regions of the monitoring image.

The high-definition camera device often cannot cover the entire location due to the size of the monitored location area, such as underground parking lots, highways, and homes. Therefore, the high-definition camera device only obtains monitoring image information within the monitoring range. The monitoring range is related to the position of the high-definition camera device, and the monitoring range is a range that can be covered by the camera of the high-definition camera device. One high-definition camera device can only monitor the monitoring image information in the monitoring range. Get it. It can be understood that the high-definition camera device may include a 360-degree wide-angle camera, and by rotating the camera, the high-definition camera device can realize wide-angle shooting of a monitoring area.

Step S20: Determine a working mode of the high-definition camera device according to the monitoring image information, where the working mode includes a white light working mode or an infrared laser working mode;

Wherein, after acquiring the monitoring image information in the monitoring range, the high-definition camera device determines the working mode of the high-definition camera device according to the monitoring image information.

Specifically, determining the working mode of the high-definition camera according to the monitoring image information includes: performing image recognition on the monitoring image, and obtaining monitoring image information of the monitoring image. The monitoring image information includes: Brightness information, ambient brightness, distance information, crowd density information, movement speed information, exposure of different areas, and more. The working mode of the high-definition camera is determined according to the brightness information, ambient brightness, distance information, flow density information, movement speed information, and exposure of different areas. The working modes include a white light working mode or an infrared laser working mode.

Specifically, the brightness information of the monitoring image is obtained according to the monitoring image, and if the brightness of the monitoring image is lower than a preset brightness threshold or fluctuates within a preset threshold range, the high-definition camera is determined. The working mode of the device is a white light working mode. For example: acquiring the current frame of the monitoring image, converting the format of the current frame to the BAYER format, performing data compression on the BAYER format image, calculating an RGB color component of the BAYER format image, and The RGB color component determines the brightness of the current frame of the monitoring image, if the brightness of the current frame of the monitoring image is lower than a preset brightness threshold, or the brightness of the current frame of the monitoring image is within a preset threshold range If it fluctuates, it is determined that the working mode of the high-definition camera is a white light working mode; otherwise, it is determined that the working mode of the high-definition camera is an infrared laser working mode.

Specifically, according to the monitoring image, the environmental brightness of the monitoring image is obtained. The environmental brightness refers to the current brightness of the monitoring environment. The monitoring image may reflect the current brightness of the monitoring environment on the side. The environment brightness of the monitored image is described, and the working mode of the high-definition camera device is determined. If the current ambient brightness is lower than a preset ambient brightness threshold, it is determined that the working mode of the high-definition camera device is a white light working mode; otherwise, it is determined that the working mode of the high-definition camera device is an infrared laser working mode.

Specifically, the working mode of the high-definition camera device is determined according to the distance information of the monitoring image. The distance information of the monitoring image refers to an object image size in the monitoring image. Specifically, the distance information of the monitoring image is characterized by a focal length of a camera of the high-definition camera. In a high-definition camera, the smaller the focal length, the wider the monitoring field of view, but the smaller the image of the object in the picture, the larger the focal length, the narrower the field of view, but the imaging of the object in the picture is clear. Therefore, by acquiring the focal length of the camera of the high-definition camera, the distance information of the monitoring image is determined, and the working mode of the high-definition camera is determined according to the distance information of the monitoring image. For example, if the distance information of the monitored image is less than a preset distance threshold, it is determined that the working mode of the high-definition camera device is a white light working mode; otherwise, it is determined that the working mode of the high-definition camera device is an infrared laser working mode. Due to the short illumination distance of the white light camera, if the focal length of the camera of the high-definition camera is small, the monitoring field of view is wide at this time, but the imaging of the object in the screen is small, and the object image of the monitoring image cannot be obtained clearly. The working mode of the device is switched to the infrared laser working mode. By acquiring the distance information of the monitoring image, and then determining the working mode of the high-definition camera device, it is beneficial to obtain a clear monitoring image.

Specifically, the working mode of the high-definition camera device is determined by acquiring the flow density information of the monitoring image. Wherein, by acquiring the monitoring image, performing image recognition on the monitoring image, if it is recognized that the monitoring image contains person characteristics, determining the flow density information, specifically, by determining the number of persons in the monitoring image And calculating the flow density information of the surveillance image according to the size of the surveillance image and the number of persons in the surveillance image. For example, by determining the ratio of the size of the monitoring image and the number of people in the monitoring image, the ratio is determined as the flow density information of the monitoring image. It can be understood that, in the case of high crowd density, in order to better obtain the monitoring image, the monitoring image needs to be clearer. Therefore, the working mode of the high-definition camera device needs to be switched to a white light working mode to meet a strong sense of screen hierarchy. And the requirement of high resolution, therefore, through the preset crowd density threshold, when the crowd density is greater than the preset crowd density threshold, it is determined that the working mode of the high-definition camera device is a white light working mode; otherwise, the high-definition camera is determined. The working mode of the device is an infrared laser working mode.

Specifically, the working mode of the high-definition camera device further includes an infrared laser working mode and a white light working mode, and the method further includes: obtaining movement speed information of the monitoring image, and specifically, obtaining continuous multi-frame monitoring images Compare the multi-frame surveillance images, and then obtain the differences in the multi-frame surveillance images, determine whether the high-definition camera device monitors a moving object, and determine the movement of the moving object based on the difference in the multi-frame surveillance images The speed, for example, is obtained by acquiring the time difference between two consecutive frames of images and combining the moving distance of the moving object in the two frames of images to calculate the moving speed information of the monitoring image. If the movement speed information is greater than a preset speed threshold, the working mode of the high-definition camera device is determined to be an infrared laser working mode and a white light working mode, and the moving object is modified by the infrared laser and white light working simultaneously. Good monitoring better meets the needs of clarity and distance.

Specifically, a working mode of the high-definition camera is determined by acquiring exposure degrees of different regions of the monitoring image. Wherein, by dividing the monitoring image into blocks, the monitoring image is divided into multiple blocks, and by detecting the brightness of the multiple blocks, the maximum brightness difference between the multiple blocks is calculated. The maximum brightness difference refers to the brightness difference between the lowest brightness block and the highest brightness block. If the maximum brightness difference is greater than a preset brightness difference threshold, it is determined that the working mode of the high-definition camera is infrared. Laser working mode; otherwise, it is determined that the working mode of the high-definition camera is a white light working mode. By detecting the area brightness of the monitored image, the working mode of the high-definition camera device is switched to the infrared laser working mode, and in the infrared laser working mode, intelligent infrared technology can also be used to prevent overexposure of a block image and certain Block image underexposure and other issues, so that the brightness of the image is evenly distributed, and the picture is more realistic and delicate.

Step S30: Switch the working state of the infrared laser camera or the white light camera according to the white light working mode or the infrared laser working mode.

Specifically, the brightness information of the monitoring image is obtained according to the monitoring image, and if the brightness of the monitoring image is lower than a preset brightness threshold or fluctuates within a preset threshold range, the high-definition camera is determined. If the working mode of the device is a white light working mode, the white light camera is turned on; otherwise, if it is determined that the working mode of the high-definition camera device is an infrared laser working mode, the white light camera is turned off and the infrared laser camera is turned on.

Specifically, according to the monitoring image, the environmental brightness of the monitoring image is obtained. The environmental brightness refers to the current brightness of the monitoring environment. The monitoring image may reflect the current brightness of the monitoring environment on the side. The environment brightness of the monitored image is described, and the working mode of the high-definition camera device is determined. If the current ambient brightness is lower than a preset ambient brightness threshold, determine the working mode of the high-definition camera device as a white light working mode, and turn on the white light camera; otherwise, determine that the working mode of the high-definition camera device is infrared In laser mode, the white light camera is turned off and the infrared laser camera is turned on. Wherein, the method further comprises: adjusting the light emitting power of the white light camera according to the ambient brightness of the monitored image. Specifically, if the ambient brightness of the monitored image is lower than a preset minimum ambient brightness threshold, the light emitting power of the white light camera is increased, so that the white light camera uses white light as a light source to supplement light, so as to better implement monitoring .

Specifically, the working mode of the high-definition camera device is determined according to the distance information of the monitoring image. The distance information of the monitoring image refers to an object image size in the monitoring image. Specifically, the distance information of the monitoring image is characterized by a focal length of a camera of the high-definition camera. In a high-definition camera, the smaller the focal length, the wider the monitoring field of view, but the smaller the image of the object in the picture, the larger the focal length, the narrower the field of view, but the imaging of the object in the picture is clear. Therefore, by acquiring the focal length of the camera of the high-definition camera, the distance information of the monitoring image is determined, and the working mode of the high-definition camera is determined according to the distance information of the monitoring image. For example: if the distance information of the monitored image is less than a preset distance threshold, determine that the working mode of the high-definition camera device is a white light working mode and turn on the white light camera; otherwise, determine that the working mode of the high-definition camera device is infrared In laser mode, the white light camera is turned off and the infrared laser camera is turned on.

Specifically, the working mode of the high-definition camera device is determined by acquiring the flow density information of the monitoring image. Wherein, by acquiring the monitoring image, performing image recognition on the monitoring image, if it is recognized that the monitoring image contains person characteristics, determining the flow density information, specifically, by determining the number of persons in the monitoring image And calculating the flow density information of the surveillance image according to the size of the surveillance image and the number of persons in the surveillance image. For example, by determining the ratio of the size of the monitoring image and the number of people in the monitoring image, the ratio is determined as the flow density information of the monitoring image. It can be understood that, in the case of high crowd density, in order to better obtain the monitoring image, the monitoring image needs to be clearer. Therefore, the working mode of the high-definition camera device needs to be switched to a white light working mode to meet a strong sense of screen hierarchy And the requirement of high resolution, so through the preset crowd density threshold, when the crowd density is greater than the preset crowd density threshold, determine that the working mode of the high-definition camera device is a white light working mode, and turn on the white light camera, otherwise To determine that the working mode of the high-definition camera is an infrared laser working mode, turn off the white light camera, and turn on the infrared laser camera.

Specifically, the working mode of the high-definition camera device further includes an infrared laser working mode and a white light working mode, and the method further includes: obtaining movement speed information of the monitoring image, and specifically, obtaining continuous multi-frame monitoring images Compare the multi-frame surveillance images, and then obtain the differences in the multi-frame surveillance images, determine whether the high-definition camera device monitors a moving object, and determine the movement of the moving object based on the difference in the multi-frame surveillance images The speed, for example, is obtained by acquiring the time difference between two consecutive frames of images and combining the moving distance of the moving object in the two frames of images to calculate the moving speed information of the monitoring image. If the movement speed information is greater than a preset speed threshold, the working mode of the high-definition camera device is determined as an infrared laser working mode and a white light working mode, and the infrared laser camera and the white light camera are turned on at the same time.

Specifically, a working mode of the high-definition camera is determined by acquiring exposure degrees of different regions of the monitoring image. Wherein, by dividing the monitoring image into blocks, the monitoring image is divided into multiple blocks, and by detecting the brightness of the multiple blocks, the maximum brightness difference between the multiple blocks is calculated. The maximum brightness difference refers to the brightness difference between the lowest brightness block and the highest brightness block. If the maximum brightness difference is greater than a preset brightness difference threshold, it is determined that the working mode of the high-definition camera is infrared. In the laser working mode, the infrared laser camera is turned on; otherwise, it is determined that the working mode of the high-definition camera device is a white light working mode, the infrared laser camera is turned off, and the white light camera is turned on. Specifically, several monitoring images may be divided into nine blocks of equal area size. By detecting the brightness of the nine blocks, the brightness difference between the nine blocks is calculated to determine the high-definition camera device. The working mode is infrared laser working mode or white light working mode. Wherein, the method further comprises: adjusting the light emitting power of the infrared laser camera according to the exposure degree of different regions of the monitoring image. Specifically, the average brightness of the plurality of blocks is calculated. If the average brightness of the plurality of blocks is lower than a preset minimum brightness threshold, the light emitting power of the infrared laser camera is increased to make the infrared laser light The camera performs infrared laser supplementary light to better acquire the surveillance image or surveillance video.

In the embodiment of the present invention, the monitoring image information within the monitoring range of the high-definition camera device is obtained; according to the monitoring image information, a working mode of the high-definition camera device is determined, and the working mode includes a white light working mode or an infrared laser. Working mode; switching the working state of the infrared laser camera or white light camera according to the white light working mode or the infrared laser working mode. In the above manner, the embodiments of the present invention can solve the technical problem that the current single video monitoring mode is prone to blurring of the monitored image information, realize intelligent adjustment of the working mode, and improve the quality of video monitoring.

Example two

In this embodiment of the present invention, unlike the first embodiment, the high-definition camera device further includes an ultra-low-light camera, and the working mode further includes an ultra-low-light working mode. The method further includes: The monitoring image information within the monitoring range of the high-definition camera device; and determining the working mode of the high-definition camera device according to the monitoring image information, the working mode includes a white light working mode and / or an infrared laser working mode or an ultra-low-illumination working mode ; Switching the working state of the infrared laser camera or white light camera or ultra-low light camera according to the white light working mode and / or infrared laser working mode or ultra-low light working mode.

The difference from the first embodiment is that, specifically, the illuminance information of the monitoring image is obtained according to the monitoring image, if the illuminance of the monitoring image is lower than a first illuminance threshold, and if the illuminance of the monitoring image is at the first Between the illuminance threshold and the second illuminance threshold, it is determined that the working mode of the high-definition camera is a white light mode, and if the illuminance of the monitored image is greater than the second illuminance threshold, the working mode of the high-definition camera is determined. Infrared laser working mode. Specifically, the first brightness threshold is set to 0.0001 Lux, and the second brightness threshold is set to 0.01 Lux.

In the embodiment of the present invention, the monitoring image information within the monitoring range of the high-definition camera device is obtained; according to the monitoring image information, a working mode of the high-definition camera device is determined, and the working mode includes a white light working mode and / or Infrared laser working mode or ultra-low-illumination working mode; according to the white light working mode and / or infrared laser working mode or ultra-low-illumination working mode, switch the working state of the infrared laser camera or white-light camera or ultra-low-light camera. In the above manner, the embodiments of the present invention can solve the technical problem that the current single video monitoring mode is prone to blurring of the monitored image information, realize intelligent adjustment of the working mode, and improve the quality of video monitoring.

Example three

Please refer to FIG. 3. FIG. 3 is a schematic structural diagram of an ultra-low-illumination night vision system according to an embodiment of the present invention. The ultra-low-illumination night vision system can be applied to a high-definition camera device. As shown in FIG. The night vision system 100 includes:

An obtaining unit 10, configured to obtain monitoring image information within a monitoring range of the high-definition camera device;

The determining unit 20 determines a working mode of the high-definition camera according to the monitoring image information, where the working mode includes a white light working mode or an infrared laser working mode;

The switching unit 30 is configured to switch the working state of the infrared laser camera or the white light camera according to the white light working mode or the infrared laser working mode.

In the embodiment of the present invention, the monitoring image information includes: brightness information of the monitoring image, and the determining unit 20 is specifically configured to:

In the embodiment of the present invention, the monitoring image information includes: distance information of the monitoring image, and the determining unit 20 is specifically configured to:

Since the system embodiment and the method embodiment are based on the same concept, as long as the content does not conflict with each other, the content of the system embodiment may refer to the method embodiment, and details are not described herein.

Please refer to FIG. 4, which is a schematic structural diagram of a high-definition camera device according to an embodiment of the present invention. As shown in FIG. 4, the high-definition camera 50 includes one or more processors 51, a memory 52, an infrared laser camera 53, a white light camera 54, and an ultra-low-light camera 55. Among them, one processor 51 is taken as an example in FIG. 4.

The processor 51 and the memory 52 may be connected through a bus or in other manners. In FIG. 4, the connection through the bus is taken as an example.

The memory 52 is a non-volatile computer-readable storage medium, and may be used to store non-volatile software programs, non-volatile computer executable programs, and modules, such as an ultra-low-illumination night vision in the embodiment of the present invention. The unit corresponding to the method (for example, each unit described in FIG. 3). The processor 51 executes various functional applications and data processing of the ultra-low-illumination night vision method by running the non-volatile software programs, instructions, and modules stored in the memory 52, that is, the ultra-low-illumination night vision of the foregoing method embodiment is implemented. Method and functions of each module and unit of the above system embodiment.

The memory 52 may include a high-speed random access memory, and may further include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 52 may optionally include a memory remotely disposed with respect to the processor 51, and these remote memories may be connected to the processor 51 through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

The module is stored in the memory 52, and when executed by the one or more processors 51, executes the ultra-low-illumination night vision method in any of the above method embodiments, for example, as shown in FIG. 2 described above Each step; also can implement the functions of each module or unit described in Figure 3.

The infrared laser camera 53 is configured to provide a high-brightness infrared laser, thereby facilitating the camera of the high-definition camera 130 to monitor video under low illumination. Wherein, the infrared laser camera mainly adopts a synchronous zoom infrared laser fill light technology. As night surveillance requirements continue to increase, infrared lasers are becoming more and more urgent due to their high brightness, long lighting distance, long chip life, high photoelectric conversion rate, and low overall power consumption.

The white light camera 54 uses a camera night vision full-color white light technology. The so-called white light camera is a new type of camera that uses white light as a light source to supplement light. Similar to infrared cameras, they provide low-light photography at night. Its biggest feature is that white light cameras can also produce color images at night.

The ultra-low-illuminance camera 55 is configured to acquire an image in an ultra-low-illuminance. Generally speaking, cameras with illuminance values greater than 0.1Lux are called ordinary cameras; cameras with illuminance values ranging from 0.1Lux to 0.01Lux are generally referred to as low-light cameras; and illuminance values ranging from 0.01Lux to 0.001Lux The camera is called a moonlight camera; when the minimum illumination value reaches or falls below 0.0001 Lux, it reaches a starlight ultra-low-light camera. When the illuminance is lower than 0.0001 Lux, ordinary cameras cannot obtain clear images in the surveillance range, which easily leads to the failure to achieve normal video surveillance. The low-light camera is in line with the green development theme of low-carbon environmental protection. The rated design power of an ultra-low-light HD gun-type camera using a CMOS sensor is about 5W, while the rated design power of an infrared fill-light HD gun-type camera using a CMOS sensor usually reaches 9W. In this way, the power saving effect of several cameras may not be obvious, but if you encounter large-scale video surveillance projects, especially in recent years, the number of monitoring points carried by the safe city project is increasing, some even reaching tens of thousands Each monitoring point, if calculated based on 1,000 monitoring points and a one-year operating time, will save about 35,000 kilowatt hours of energy consumption for the monitoring system. The ultra-low-light camera is not much different from other camera products in use, so it became the darling in the market as soon as it went on the market. More and more projects and projects are deployed in important areas, especially in hospitals, banks, smart buildings, etc., which are important and sensitive areas that have a large impact on human visual perception and have been in low light for a long time.

The ultra-low-illumination series CCD cameras use the frame accumulation technology. The infrared camera provides surprisingly low brightness performance and can compose images in almost complete darkness. In these cameras, the concentration of photons on the CCD sensor is 2 to 128 times (1 to 2 seconds) longer than the maximum exposure time (1/60 or 1/50 second) of a conventional CCD infrared camera. As a result, the minimum illumination of the camera to produce a usable image is reduced by 2 to 128 times. Using an ultra-low-light camera with frame accumulation technology, users can see color images under star light conditions (0.0035 Lux), and black and white images under cloudy star light conditions (0.0002 Lux), and scattered backgrounds in cities Light (such as light pollution) is sufficient to produce good color exposure. The ultra-low-light camera can also extend the effective range of using infrared. Using frame cumulative exposure, the range of influence of an infrared light source can be extended by 128 times. If a starlight camera is used, an infrared lamp designed to illuminate a target 10 meters away, its working range Can be extended to 1280 meters. Maximum exposure (frame accumulation rate), AVS series models (PL926 / KL926) are fixed at 4 times, (PX926 / KX926) has a frame accumulation interval of 2 to 128 times, which is set by the user through the on-screen menu display menu. Remember special The extended exposure time also requires a special cooling system to reduce the temperature of the CCD chip to -10C to reduce black current and hinder the image. Similarly, the method of obtaining images under low illumination is to increase the exposure of the CCD in a single frame image through a single frame accumulation of charge, thereby improving the sensitivity of the camera to a single frame image. This method can also obtain a lower illuminance index, but it is necessary to reduce the degree of coherence of the image, so when choosing this camera, please pay attention not to use it with the gimbal as much as possible, otherwise it will cause the phenomenon of losing the picture. There are some other ways to obtain images under low light, but none of them can fundamentally solve the problem of light. In addition, pay attention to several points when choosing to use low-light cameras and infrared lights. First, you must choose the right lens. In order to increase the sensitivity of infrared cameras to infrared lights and scenes, lenses with a large amount of light should be used as much as possible, and when using an automatic aperture or a motorized variable lens, the driving level of the aperture should be set as wide as possible. Because generally with the increase of the focal length of the lens, its light flux will be relatively reduced. When choosing an infrared lamp, leave a certain margin, and pay attention to the nominal index of the infrared lamp. Second, the optional power supply of the infrared lamp should meet the minimum electric power required by it as much as possible, and the irradiation distance is often insufficient. Third, the degree of reflection of the scene to be photographed must be considered. Because infrared rays have the same characteristics as reflection and refraction of visible light, if there is no good reflective environment (such as buildings, fences, signs) around the target scene, certain considerations must be taken. Distance margin.

An embodiment of the present invention also provides a non-volatile computer storage medium. The computer storage medium stores computer-executable instructions, and the computer-executable instructions are executed by one or more processors, such as a process in FIG. 4. The processor 51 may enable the one or more processors to execute the ultra-low-illumination night vision method in any of the foregoing method embodiments, for example, execute the ultra-low-illumination night vision method in any of the foregoing method embodiments, for example, execute the foregoing description The steps shown in Figure 2; the functions of the units described in Figure 3 can also be implemented.

In the embodiment of the present invention, by providing a high-definition camera device, the high-definition camera device includes a processor, a memory, an infrared laser camera, a white light camera, and an ultra-low-light camera. The working status of the ultra-low-light camera realizes intelligent adjustment of the working mode and improves the quality of video surveillance.

The embodiments of the device or device described above are only schematic, and the unit modules described as separate components may or may not be physically separated, and the components displayed as module units may or may not be physical units. , Can be located in one place, or can be distributed to multiple network module units. Some or all of the modules may be selected according to actual needs to achieve the objective of the solution of this embodiment.

Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments can be implemented by means of software plus a general hardware platform, and of course, also by hardware. Based on such an understanding, the above-mentioned technical solutions that are essentially or contribute to related technologies can be embodied in the form of software products, which can be stored in computer-readable storage media, such as ROM / RAM, magnetic disks , Optical discs, etc., including several instructions until a computer device (which may be a personal computer, a server, or a network device, etc.) executes the methods described in various embodiments or certain parts of the embodiments.

Finally, it should be noted that the above embodiments are only used to describe the technical solution of the present invention, but not limited thereto. Under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined. The steps can be implemented in any order and there are many other variations of the different aspects of the invention as described above, for the sake of brevity they are not provided in the details; although the invention has been described in detail with reference to the foregoing embodiments, it is common in the art The skilled person should understand that they can still modify the technical solutions described in the foregoing embodiments, or equivalently replace some of the technical features; and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the implementation of the present invention. Examples of technical solutions.

Claims

An ultra-low-illumination night vision method is applied to a high-definition camera device. The high-definition camera device includes an infrared laser camera and a white light camera. The method includes:

Acquiring monitoring image information within a monitoring range of the high-definition camera device;

Determining a working mode of the high-definition camera according to the monitored image information, the working mode includes a white light working mode or an infrared laser working mode;

According to the white light working mode or the infrared laser working mode, the working state of the infrared laser camera or the white light camera is switched.
The method according to claim 1, wherein the monitoring image information comprises: brightness information of the monitoring image,

Determining, according to the monitoring image information, a working mode of the high-definition camera device, the working mode including a white light working mode or an infrared laser working mode, including:

If the brightness of the monitored image is lower than a preset brightness threshold or fluctuates within a preset threshold range, determining that the working mode of the high-definition camera device is a white light working mode,

The switching the working state of the infrared laser camera or the white light camera is specifically:

Turn on the white light camera and enter the working state.
The method according to claim 2, wherein the monitoring image information further comprises: an ambient brightness of the monitoring image,

The method further includes:

Adjusting the light emitting power of the white light camera according to the ambient brightness of the monitoring image.
The method according to claim 1, wherein the monitoring image information comprises: distance information of the monitoring image,

Determining, according to the monitoring image information, a working mode of the high-definition camera device, the working mode including a white light working mode or an infrared laser working mode, including:

If the distance of the monitored image exceeds a preset distance threshold, determining that the working mode of the high-definition camera device is an infrared laser working mode,

The switching the working state of the infrared laser camera or the white light camera is specifically:

Turn on the infrared laser camera and enter the working state.
The method according to claim 4, wherein the monitoring image information further comprises: exposure degrees of different regions of the monitoring image,

The method further includes:

Adjust the light emitting power of the infrared laser camera according to the exposure of different areas of the monitoring image.
An ultra-low-illumination night vision system, characterized in that the system includes:

An obtaining unit, configured to obtain monitoring image information within a monitoring range of the high-definition camera device;

A determining unit, according to the monitoring image information, determining a working mode of the high-definition camera device, the working mode including a white light working mode or an infrared laser working mode;

The switching unit is configured to switch the working state of the infrared laser camera or the white light camera according to the white light working mode or the infrared laser working mode.
The system according to claim 6, wherein the monitoring image information comprises: brightness information of the monitoring image, and the determining unit is specifically configured to:

If the brightness of the monitored image is lower than a preset brightness threshold, or fluctuates within a preset threshold range, it is determined that the working mode of the high-definition camera is a white light working mode.
The system according to claim 6, wherein the monitoring image information comprises: distance information of the monitoring image, and the determining unit is specifically configured to:

If the distance of the monitoring image exceeds a preset distance threshold, it is determined that the working mode of the high-definition camera device is an infrared laser working mode.
A high-definition camera device, comprising:

At least one processor; and

A memory connected in communication with the at least one processor; wherein,

The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor, so that the at least one processor can execute the method according to any one of claims 1-5. method.
A non-volatile computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a high-definition imaging device, the high-definition imaging device executes claim 1 -The method according to any one of -5.