Split type long-focus visible light assembly fog penetration compensation method, system and equipment

Abstract

The invention discloses a split type long-focus visible light assembly fog-penetrating compensation method, system and device, and relates to the monitoring technology, and the method comprises the steps: recording clear points of different focusing values according to the focusing feedback value range of a long-focus lens at a specified environment temperature, switching fog-penetrating mode virtual focus, and carrying out the manual focusing on the condition that an image is clear again, recording the offset P1 of the focusing value to obtain a first relation curve of the fog penetration shift of the focusing value; acquiring a change value of an inner focus offset P1 in a target temperature range and a corresponding value of the temperature by taking the specified environment temperature as a reference point to form a second relation curve; and searching based on the first relation curve and the second relation curve to obtain the offset P for compensating the movement of the focusing motor. The method is used for solving the problem of image virtual focus after the split type long-focus visible light assembly switches fog penetration.

Description

Technical Field

[0001] The present application relates to the field of monitoring technology, and in particular to a method, system and device for fog penetration compensation of a split-type long-focus visible light component. Background Art

[0002] In recent years, with global warming, accelerated urbanization, and increasing population density, urban fog has become increasingly severe. This severe fog severely impacts video surveillance systems, including those for public security, traffic, and environmental monitoring, and in severe cases can even paralyze urban security systems. The fog-penetrating capabilities of visible light sensors in surveillance equipment are playing an increasingly important role in surveillance applications. Addressing the issue of out-of-focus images after switching to fog-penetrating split-type, long-focus visible light sensors is a hot topic within the surveillance industry. Summary of the Invention

[0003] The embodiments of the present application provide a split-type telephoto visible light component fog penetration compensation method, system and device to solve the image out-of-focus problem after the split-type telephoto visible light component switches to fog penetration.

[0004] The present application provides a method for compensating for fog penetration of a split-type telephoto visible light assembly, comprising:

[0005] At the specified ambient temperature, based on the focus feedback value range of the telephoto lens, record the clear points at different focus values, and,

[0006] When the defocusing mode is switched to fog penetration mode and the image is manually focused and becomes clear again, the focus value offset P1 is recorded to obtain a first relationship curve of the focus value and fog penetration offset;

[0007] Taking the designated ambient temperature as a reference point, collecting corresponding values of the focus offset P1 change within the target temperature range and the temperature to form a second relationship curve, wherein the target temperature range covers the extreme temperature range of the ambient temperature change of the device;

[0008] An offset P for compensating for the movement of the focus motor is obtained based on the first relationship curve and the second relationship curve.

[0009] An embodiment of the present application further provides a split-type telephoto visible light component fog penetration compensation system, comprising a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the aforementioned method are implemented.

[0010] An embodiment of the present application further provides a monitoring device, comprising the aforementioned split-type long-focus visible light component fog penetration compensation system.

[0011] The embodiment of the present application calculates the focus offset value of the clear point of the image after the fog is penetrated by combining the change law of the focus value difference between the clear point of the image before and after the fog is penetrated and the change law of the focus value at different temperatures, thereby solving the problem of out-of-focus image after the split telephoto visible light component switches to fog penetration.

[0012] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0014] Figure 1 This is a schematic diagram of the basic process of the split-type long-focus visible light assembly fog compensation method according to an embodiment of the present application;

[0015] Figure 2 This is a first relationship curve diagram of the focus value and the fog penetration offset according to an embodiment of the present application;

[0016] Figure 3 FIG. 1 is a second relationship curve diagram of the temperature and the offset of the fog penetration focus value according to an embodiment of the present application. DETAILED DESCRIPTION

[0017] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0018] The embodiment of the present application provides a method for compensating for fog penetration of a split-type telephoto visible light component. The method of the present application calculates the focus offset value of the image clear point after fog penetration by combining the change law of the focus value difference between the image clear point before and after fog penetration and the change law of the focus value at different temperatures. The lens focus motor can be rotated to the clear point position according to the algorithm to make the image clear after fog penetration. Specifically, Figure 1 As shown, the method of the present application includes the following steps:

[0019] In step S101, under a specified ambient temperature, different focus value sharp points are recorded according to the focus feedback value range of the telephoto lens. In some embodiments, the specified ambient temperature is 15°C-25°C, for example, the specified ambient temperature may be 20°C.

[0020] In step S102, when the defocusing mode is switched to the through-fog mode and the image is clear again after manual focus, the offset P1 of the focus value is recorded to obtain a first relationship curve of the focus value through-fog offset, as shown in FIG. Figure 2 As shown, a first relationship curve is formed according to the recorded clear points of different focus values and the offset P1 of the recorded focus values.

[0021] In step S103, the corresponding values of the focus offset P1 change value and the temperature within the target temperature range are collected with the specified ambient temperature as the reference point to form a second relationship curve, wherein the target temperature range covers the extreme temperature range of the device's operating ambient temperature. Specifically, in some embodiments, after high and low temperature tests, the corresponding values of the focus offset P1 change value and the temperature within the range of -40°C to 70°C are collected with the specified ambient temperature as the reference point to form a second relationship curve. For example, if the ambient temperature is 20°C, the corresponding values of the focus offset P1 change value and the temperature within the range of -40°C to 70°C are collected with 20°C as the reference point, as shown in FIG. Figure 3 As shown, a second relationship curve is formed.

[0022] In step S104, an offset P for compensating for the movement of the focus motor is obtained based on the first relationship curve and the second relationship curve.

[0023] The embodiment of the present application calculates the focus offset value of the clear point of the image after the fog is penetrated by combining the change law of the focus value difference between the clear point of the image before and after the fog is penetrated and the change law of the focus value at different temperatures, thereby solving the problem of out-of-focus image after the split telephoto visible light component switches to fog penetration.

[0024] In some embodiments, the offset P obtained by looking up to compensate for the focus motor movement is the sum of the corresponding focus value offset and the temperature focus value offset.

[0025] In some embodiments, the method further includes controlling the focus motor to move and find the corresponding offset P after each defogging operation. This application combines the variation of focus values at different temperatures to calculate the focus offset value of the clear point of the image after defogging. The lens focus motor can then be rotated to the clear point according to this algorithm to ensure that the image remains clear after defogging.

[0026] The method of the present application effectively solves the problem of out-of-focus images of split-type long-focus visible light components after fog penetration, improves the effect of fog penetration observation of visible light components, and makes the fog penetration function more intelligent.

[0027] An embodiment of the present application further provides a split-type telephoto visible light component fog penetration compensation system, comprising a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the aforementioned method are implemented.

[0028] An embodiment of the present application further provides a monitoring device, comprising the aforementioned split-type long-focus visible light component fog penetration compensation system.

[0029] It should be noted that, in the various embodiments of the present application, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0030] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0031] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0032] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are protected by this application.

Claims

1. A method for compensating fog penetration of a split-type long-focus visible light component, characterized in that: include: At the specified ambient temperature, based on the focus feedback value range of the telephoto lens, record the clear points at different focus values, and, When the defocusing mode is switched to fog penetration mode and the image is manually focused and becomes clear again, the focus value offset P1 is recorded to obtain a first relationship curve of the focus value and fog penetration offset; Taking the designated ambient temperature as a reference point, collecting corresponding values of the focus offset P1 change within the target temperature range and the temperature to form a second relationship curve, wherein the target temperature range covers the extreme temperature range of the ambient temperature change of the device; An offset P for compensating for the movement of the focus motor is obtained based on the first relationship curve and the second relationship curve.

2. The method for compensating fog penetration of a split-type long-focus visible light assembly according to claim 1, wherein: The specified ambient temperature is 15°C-25°C.

3. The method for compensating fog penetration of a split-type long-focus visible light assembly according to claim 2, wherein: Also includes: After high and low temperature test, the corresponding values of the focus offset P1 change value and temperature in the range of -40°C to 70°C are collected with the specified ambient temperature as the reference point to form a second relationship curve.

4. The method for compensating fog penetration of a split-type long-focus visible light assembly according to claim 1, wherein: The offset P for compensating the focus motor movement obtained by searching is the sum of the corresponding focus value offset and the temperature focus value offset.

5. The method for compensating fog penetration of a split-type long-focus visible light assembly according to claim 1, wherein: Also includes: After each fog penetration, the focus motor is controlled to move the corresponding offset P to be found.

6. A split-type long-focus visible light component fog compensation system, characterized in that: The method comprises a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 5 are implemented.

7. A monitoring device, characterized in that: It includes the split-type long-focus visible light component fog penetration compensation system as described in claim 6.

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