CN113542546A

CN113542546A - Image pickup device, image pickup method, equipment and device

Info

Publication number: CN113542546A
Application number: CN202110605106.4A
Authority: CN
Inventors: 杨铭瑞; 陈洁; 郑东辉
Original assignee: Zhejiang Dahua Technology Co Ltd
Current assignee: Zhejiang Dahua Technology Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-10-22

Abstract

The application discloses image pickup apparatus, image pickup method, device and apparatus, the image pickup apparatus includes: lens, sensor, optical filter and drive assembly. The sensor is used for acquiring light and converting an optical signal into an electric signal; the optical filter is positioned on one side of the sensor for receiving the optical signal; the optical filter is provided with at least two filter areas with different filter effects; the driving component is connected with the optical filter and used for driving the optical filter to move so as to switch the optical filter area of the optical filter on the light path of the incident sensor. By means of the method, hardware cost can be reduced, and clear images can be obtained.

Description

Image pickup device, image pickup method, equipment and device

Technical Field

The present application relates to the field of imaging, and in particular, to an imaging apparatus, an imaging method, a device, and an apparatus.

Background

With the development of the imaging technology, the current imaging device can still capture a clear image in an environment with poor light at night. In order to achieve the monitoring image effect in both day and night, a plurality of camera modules are often arranged in the camera to capture images with different spectrums.

In the long-term research and development process, the inventor of the application finds that a camera provided with a plurality of camera assemblies is high in cost, and the camera is difficult to popularize in the using process of products. Meanwhile, the adoption of a plurality of imaging units can lead to the complex structure of the camera and increase the overall dimension of the camera. In addition, the physical positions of the imaging units are different, and the lens is distorted in a large amplitude, so that the calculation complexity of the algorithm is increased.

Disclosure of Invention

The technical problem mainly solved by the application is to provide a camera device, a camera method, equipment and a device, which can reduce hardware cost and obtain clear images.

In order to solve the technical problem, the application adopts a technical scheme that: provided is an image pickup apparatus including: lens, sensor, optical filter and drive assembly. The sensor is used for acquiring light and converting an optical signal into an electric signal; the optical filter is positioned on one side of the sensor for receiving the optical signal; the optical filter is provided with at least two filter areas with different filter effects; the driving component is connected with the optical filter and used for driving the optical filter to move so as to switch the optical filter area of the optical filter on the light path of the incident sensor.

In order to solve the above technical problem, another technical solution adopted by the present application is: provided is an imaging method including: the driving component drives the optical filter to move so as to switch the optical filter area of the optical filter on the light path of the incident sensor; the sensor converts the acquired optical signal into an electric signal to obtain a frame of image; and fusing images shot in one motion period of the optical filter to obtain a fused image.

In order to solve the above technical problem, another technical solution adopted by the present application is: a computer device is provided comprising a camera coupled to a processor, the camera being configured to acquire an image; the processor is used for executing instructions to realize the image pickup method.

In order to solve the above technical problem, another technical solution adopted by the present application is: provided is a device having a storage function, the device storing a program, and the program being capable of implementing the above-mentioned imaging method when executed

The beneficial effect of this application is: in contrast to the state of the art, the present application provides an image pickup apparatus including: lens, sensor, optical filter and drive assembly. Wherein the optical filter is positioned at one side of the sensor for receiving the optical signal; the optical filter is provided with at least two filter areas with different filter effects and can be driven to switch. By arranging the filter to comprise at least two filter areas with different filter effects, it is achieved that the filter areas located on the incident light path of the sensor can be switched by driving the filter to move only. Therefore, the camera device can shoot images of different spectrums by only one sensor and one lens without arranging a plurality of sensors and a plurality of lenses, so that the structure of the camera device is simplified, and the production cost is reduced. By fusing images of different spectrums at adjacent moments, images with more detailed characteristics and more clearness can be obtained.

Drawings

Fig. 1 is a schematic structural diagram of an image pickup apparatus according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of an image pickup apparatus according to another embodiment of the present application;

FIG. 3 is a schematic diagram of a filter structure according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a filter structure according to another embodiment of the present application;

fig. 5 is a schematic flowchart of an image capturing method according to an embodiment of the present application;

FIG. 6 is a schematic block diagram of a computer device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a device with a storage function according to an embodiment of the present application.

Detailed Description

In order to make the purpose, technical solution and effect of the present application clearer and clearer, the present application is further described in detail below with reference to the accompanying drawings and examples.

In order to solve the above technical problem, the present application provides an image pickup apparatus, which includes a lens, a sensor, an optical filter, and a driving assembly for driving the optical filter to move. The optical filter comprises at least two filtering areas with different filtering effects, and the driving component can drive the optical filter to switch the filtering areas on the light path of the incident sensor. The camera device simplifies the structure and can shoot clear pictures under different conditions. As described in detail below.

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an image pickup apparatus according to an embodiment of the present application. Fig. 2 is a schematic structural diagram of an image pickup apparatus according to another embodiment of the present application. The image capturing apparatus 100 includes a lens 110, a sensor 120, a filter 130, and a driving assembly 140.

The lens 110 may be used to adjust focus, aperture, and fixation. The lens 110 may be any type of lens 110, such as a fixed focus lens or a zoom lens, and further, such as a wide-angle lens, a standard lens or a telephoto lens, etc., without limitation. The focal length refers to a distance between a focal point of parallel light passing through the lens 110 and the lens of the lens 110. The sensor 120 may be used to acquire light and convert the light signal into an electrical signal, thereby completing one frame of image. The sensor 120 may be any suitable sensor 120, such as a CCD (charge-coupled device) or a CMOS (complementary metal oxide semiconductor) sensor 120. The lens 110 is located on the side of the sensor 120 that captures the optical signal. For convenience of explanation only, the side of the sensor 120 for acquiring the optical signal is the front. That is, the lens 110 is positioned in front of the sensor 120.

The filter 130 is located on the side of the sensor 120 that receives the optical signal. The optical filter 130 serves to filter the optical signal irradiated to the sensor 120. The filter 130 is provided with at least two filter regions having different filter effects. The filtering effect may include the effects of not filtering light, blocking light in a specific wavelength range, or allowing only light in a specific wavelength range to pass through. The filter 130 may include any filter regions with at least two different filter effects, so that the sensor 120 can acquire light rays with different wavelength ranges.

The driving assembly 140 is connected to the filter 130. The driving component 140 is used for driving the filter 130 to move so as to switch the filter area of the filter 130 on the optical path of the incident sensor 120. The driving assembly 140 drives the filter 130 to move, so as to switch the filtering region located right in front of the sensor 120, so that the sensor 120 can acquire light in different wavelength ranges.

In the embodiment of the present application, by configuring the filter 130 to include at least two kinds of filter regions having different filter effects, it is possible to switch the filter regions on the incident light path of the sensor 120 only by driving the filter 130 to move. Therefore, the image pickup device 100 can pick up images of different spectrums by only one sensor 120 and one lens 110, and a plurality of sensors 120 and a plurality of lenses 110 are not required, so that the structure of the image pickup device 100 is simplified, and the production cost is reduced. By fusing images of different spectrums at adjacent moments, images with more detailed characteristics and more clearness can be obtained.

Please refer to fig. 1 and fig. 2 continuously for the positional relationship between the filter 130 and the lens 110. In one embodiment, referring to fig. 1, the filter 130 is located between the lens 110 and the sensor 120. Most lenses 110 are tapered in diameter in a direction toward the sensor 120, and the filter 130 is disposed between the lenses 110 and the sensor 120, so that the filter 130 only needs to be small in size to filter all light incident on the sensor 120. That is, by disposing the filter 130 between the lens 110 and the sensor 120, the size of the filter 130 can be reduced, and the size of the entire image pickup apparatus 100 can be reduced.

In another embodiment, with continued reference to fig. 2, the filter 130 may also be located on a side of the lens 110 away from the sensor 120. In the manufacturing process of the image capturing apparatus 100, the optical filter 130 may be disposed after the lens 110 and the sensor 120 are fixed, so as to simplify the manufacturing process.

In another embodiment, the filter 130 is located in the middle of the lens 110. The lens 110 is mostly composed of a plurality of lenses, and the filter 130 is disposed in the lens 110, so that the size of the filter 130 can be further reduced, and the size of the image pickup apparatus 100 can be reduced. Further, the optical filter 130 may be disposed near a lens with a smaller size in the lens 110, so that a good light filtering effect may be achieved when the optical filter 130 is of a smaller size.

The filter 130 may be configured to include at least two filter regions, for example, the filter 130 may include two filter regions, three filter regions, or four filter regions. Each filtering region of the optical filter 130 may be uniformly distributed or non-uniformly distributed, so that each filtering region can filter all light rays obtained by the sensor 120. The optical filter 130 includes at least two filter regions with different filter effects, such as a full transmission region, an infrared cut-off region, a band-pass filter region, and a fog-transmitting filter region. That is, the filter regions may include, but are not limited to, the following filter effects: a full-transmission area, an infrared cut-off area, a band-pass filter area and a fog-transmitting filter area. Specifically, the fully transparent region may refer to a region capable of allowing light of all wavelength bands to pass through. The infrared cut-off region may refer to a filter region capable of blocking infrared rays. Specifically, the infrared cut-off region may be a filter region capable of cutting off light with a wavelength range of 700 ± 50nm to 1400 ± 50nm, or may be a filter region capable of allowing light with a wavelength range of 375 ± 50nm to 650 ± 50nm to pass through. The term "cut off a certain range of light passage" means that the transmittance of light in the certain range is greater than 50%. The band pass filter region may refer to a filter 130 that allows light signals to pass only in a specific wavelength range. The images acquired through the band-pass filter area can be used for biological identification and the like. Specifically, the band-pass filter region may only allow light signals in the range of 850nm ± 50nm to pass through. The fog-transparent filter region can be a filter region which only allows light with a wavelength range of 400 +/-50 nm-600 +/-50 nm to pass through. Clear images penetrating through the cloud and the smoke can be obtained through the fog-penetrating filter area.

For example, please refer to fig. 3 and 4 for the specific structure of the filter 130. Fig. 3 is a schematic diagram of a filter structure according to an embodiment of the present application. The filter 130 includes a first filter region 131 and a second filter region 132, wherein the areas of the two filter regions may be equal or unequal. The area of the first filter region 131 or the second filter region 132 can at least completely filter the light captured by the sensor 120. The first filter region 131 can be a full-transmission region, and the second filter region 132 can be an infrared-cut region. Specifically, the second filter region 132 may be covered with an infrared cut-off film, so as to block infrared light. Fusing the image obtained through the first filter region 131 and the image obtained through the second filter region 132 can obtain a clear image at a lower illumination.

Fig. 4 is a schematic diagram of a filter structure according to another embodiment of the present application. The filter 130 includes a third filter region 133, a fourth filter region 134, a fifth filter region 135 and a sixth filter region 136. The third filter region 133 can be a full-transmission region, the fourth filter region 134 can be an infrared cut-off region, the fifth filter region 135 can be a band-pass filter region, and the sixth filter region 136 can be a fog-transparent filter region. In this embodiment, the camera device 100 can switch the filter regions according to the user requirement to obtain an image meeting the requirement.

In one embodiment, the movement of the filter 130 includes rotation, oscillation, or translation. That is, the filter 130 may switch the filter region directly in front of the sensor 120 by rotating, swinging, or translating. In one embodiment, the movement of the filter 130 includes rotation or oscillation, and the driving assembly 140 includes: a drive shaft 141 and a motor 142. The driving shaft 141 is connected to the optical filter 130 and is used for driving the optical filter 130 to rotate or swing; the motor 142 is connected to the driving shaft 141 for driving the driving shaft 141 to rotate. The motor 142 may be any suitable motor 142, such as a solenoid valve, a servo motor, or a dc brushless motor. The motor 142 and the driving shaft 141 may be directly connected, for example, the driving shaft 141 is directly a rotating shaft of the motor 142, or the motor 142 may be connected to the driving shaft 141 by other means, for example, the motor 142 and the driving shaft 141 are connected by a means such as a timing belt, a belt, or a gear, and the motor 142 drives the driving shaft 141 to rotate by a means such as a driving timing belt, a belt, or a gear. The driving shaft 141 may be connected to the filter 130 in any manner, so that the driving shaft 141 can rotate or swing the filter 130 when rotating or swinging back and forth. The driving shaft 141 may rotate or swing the filter 130 by driving an edge of the filter 130, or may rotate or swing the filter 130 by driving a center of the filter 130. Specifically, in one embodiment, the filter 130 is circular, and the driving shaft 141 is disposed at the center of the filter 130 and perpendicular to the filter 130. Accordingly, when the driving shaft 141 is driven to rotate or oscillate by the electrodes, the filter 130 can rotate or oscillate at the same angular velocity as the driving shaft 141.

In order to solve the technical problem, the application also provides a shooting method. The image capturing method can be implemented by the image capturing apparatus 100, please refer to fig. 5. Fig. 5 is a flowchart illustrating an image capturing method according to an embodiment of the present application. It should be noted that, if the result is substantially the same, the flow sequence shown in fig. 5 is not limited in this embodiment. As shown in fig. 5, the method includes:

step 510: the driving component 140 drives the filter 130 to move so as to switch the filter area of the filter 130 on the optical path of the incident sensor 120.

By switching the filter area of the filter 130 on the optical path of the incident sensor 120, the sensor 120 can obtain optical signals with different spectrums.

Step 520: the sensor 120 converts the acquired optical signal into an electrical signal, and obtains one frame image.

The sensor 120 may convert an optical signal obtained within a preset time into an electrical signal, thereby obtaining one frame image. The number of frames of an image obtained per unit time may be referred to as a frame rate.

Step 530: the images captured within one motion period of the optical filter 130 are fused to obtain a fused image.

The filter regions that need to be switched all at once after the switching of the filters 130 can be referred to as one movement cycle of the filters 130. For example, to meet the requirement of shooting, the filter 130 needs to switch two filter regions, and then the filter 130 finishes switching two filter regions, which means one motion cycle.

In one movement period of the optical filter 130, all images captured by the sensor 120 are fused to obtain an image meeting the requirement. For example, the filter 130 needs to switch between the full-transmission region and the infrared-cut region, so that two adjacent full-transmission region images and two adjacent infrared-cut region images captured by the sensor 120 can be fused to obtain a fused image. The fused image can have the characteristics of the images under two spectral conditions, and is clearer.

In one embodiment, the time of the motion period of the filter 130 is proportional to the time of acquiring one frame of image by the sensor 120. It can also mean that the switching frequency of the filter region in the filter 130 is equal to the frame rate. So that it can be satisfied that the images of one frame obtained by the sensor 120 are all images under the same spectral condition. For example, when the frame rate of the imaging apparatus 100 is 25 frames/S, the time for acquiring one frame of image by the sensor 120 is 1/25S. The time for switching the filter region of the filter 130 is 1/25S. When the filter 130 needs to switch two filter regions to complete one motion cycle, the duration of one motion cycle of the filter 130 may be 2/25 s.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a computer device according to an embodiment of the present application. In this embodiment, the computer apparatus 600 includes a processor 610 and the camera 100 coupled.

Processor 610 may also be referred to as a CPU (Central Processing Unit). The processor 610 may be an integrated circuit chip having signal processing capabilities. The processor 610 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The image pickup apparatus 100 may be the image pickup apparatus 100 in any of the embodiments described above.

The computer device 600 may further include a memory (not shown) for storing instructions and data required for the processor 610 to operate.

The processor 610 is configured to execute instructions to implement the methods provided by any of the embodiments of the camera method described above and any non-conflicting combinations.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a device with a storage function according to an embodiment of the present application. The device 700 with storage function according to the embodiment of the present application stores program data, which can be read by a computer and executed by a processor, so as to implement the method provided by any embodiment of the imaging method and any non-conflicting combination. The instructions may form a program file stored in the apparatus with a storage function in the form of a software product, so as to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute all or part of the steps of the methods according to the embodiments of the present application. The apparatus 700 with storage function includes: various media capable of storing program codes, such as a usb disk, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, or terminal devices, such as a computer, a server, a mobile phone, and a tablet.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims

1. An image pickup apparatus, comprising:

a lens;

the sensor is used for acquiring light and converting an optical signal into an electric signal;

the optical filter is positioned on one side of the sensor for receiving the optical signal; the optical filter is provided with at least two filter areas with different filter effects;

and the driving component is connected with the optical filter and used for driving the optical filter to move so as to switch the optical filter area of the optical filter on the light path of the incident sensor.

2. The image pickup apparatus according to claim 1, wherein the filter includes at least two filter regions having different filter effects, which are selected from a full transmission region, an infrared cut region, a band-pass filter region, and a fog-transparent filter region.

3. The image pickup apparatus according to claim 1, wherein said filter is located between said lens and said sensor.

4. The image pickup apparatus according to claim 1, wherein said filter is located on a side of said lens away from said sensor.

5. The image pickup apparatus according to claim 1, wherein said filter is located in a middle portion of said lens.

6. The imaging device of claim 1, wherein the filter motion comprises rotation, oscillation, or translation.

7. The image pickup apparatus according to claim 6, wherein the filter movement means includes rotation or oscillation, and the drive unit includes:

the driving shaft is connected with the optical filter and is used for driving the optical filter to rotate or swing;

and the motor is connected with the driving shaft and is used for driving the driving shaft to rotate.

8. The image pickup apparatus according to claim 7, wherein the filter has a circular shape, and the drive shaft is provided at a center of the filter so as to be perpendicular to the filter.

9. An image pickup method, comprising:

the driving component drives the optical filter to move so as to switch the optical filter area of the optical filter on the light path of the incident sensor;

the sensor converts the acquired optical signal into an electric signal to obtain a frame of image;

and fusing the images shot in one motion period of the optical filter to obtain a fused image.

10. The imaging method according to claim 9, wherein the time of the filter movement period is proportional to the time when the sensor acquires one frame of image.

11. A computer apparatus comprising a camera and a processor coupled,

the camera device is used for acquiring images;

the processor is configured to execute instructions to implement the camera method according to any one of claims 9-10.

12. An apparatus having a storage function, characterized in that the apparatus stores a program that is capable of implementing the imaging method according to any one of claims 9 to 10 when executed.