Video signal separation processing circuit

Abstract

The utility model discloses a video signal separation processing circuit, belongs to the technical field of video signal processing, and solves the problem that a video image signal needs to be separated and processed in a more direct and difficult-to-mistake manner at present. Comprising a conventional camera used for collecting images and outputting video image signals; the infrared camera is used for acquiring images in a low-light-intensity environment and outputting video image signals; the optical filter camera is used for acquiring images in a high-light-intensity environment and outputting video image signals; and the input ends of the multiplexer are respectively coupled with the output ends of the conventional camera, the infrared camera and the optical filter camera. According to the utility model, the video signal separation processing circuit automatically identifies ambient light, the multiplexer is controlled by the light intensity sensor and the voltage comparator to select a proper camera, and images are displayed by the display after being processed by the FPGA, so that full-automatic high-quality video acquisition is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of video signal processing, in particular to a video signal separation processing circuit. Background Art

[0002] Video processing circuits are electronic systems designed specifically to process video signals. They are responsible for converting analog or digital video signals into a format suitable for display or further processing. Such circuits usually include image acquisition modules, which are used to capture real-time images and convert them into electrical signals; signal conditioning units, which are used to amplify and filter these signals to improve signal quality; analog-to-digital converters (ADCs), which convert analog video signals into digital form for processing by digital signal processors (DSPs) or field programmable gate arrays (FPGAs); and digital signal processing units, which are responsible for performing operations such as denoising, color correction, compression, and dehazing.

[0003] At present, the image acquisition module is often affected by the ambient light when actually acquiring the scene. As a result, the video image signal extracted by the image acquisition module needs to be separated and processed using different algorithms according to the different ambient light intensities. However, the algorithm processing cannot actually simulate the real environment after all, and the algorithm processing will always result in video image signal processing errors. Now it is necessary to separate and process the video image signal in a more direct and error-free way.

[0004] Therefore, a video signal separation processing circuit is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a video signal separation processing circuit.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A video signal separation processing circuit, comprising

[0008] Conventional camera, which is used to capture images and output video image signals;

[0009] Infrared camera, which is used to capture images in low light intensity environment and output video image signals;

[0010] An optical filter camera, which is used to capture images in a high light intensity environment and output video image signals;

[0011] A multiplexer, each input end of which is respectively coupled to the output end of the conventional camera, the infrared camera, and the optical filter camera, and is used to switch the conventional camera, the infrared camera, or the optical filter camera to output a single video image signal;

[0012] The light intensity detection circuit has an output end coupled to the controlled end of the multiplexer. The light intensity detection circuit controls the multiplexer to switch the conventional camera, the infrared camera, or the optical filter camera to output a single video image signal according to the ambient light intensity.

[0013] Preferably, it further comprises an FPGA chip, the input end of the FPGA chip is coupled to the output end of the multiplexer, and the FPGA chip is used to process the video image signal.

[0014] Preferably, it also includes a display, the input end of the display is coupled to the output end of the FPGA chip, and the display is used to display the video image processed by the FPGA chip.

[0015] Preferably, the light intensity detection circuit comprises

[0016] A light intensity sensor that collects ambient light intensity and generates a light intensity signal;

[0017] A first voltage comparison circuit, whose input terminal is coupled to the output terminal of the light intensity sensor, responds to the light intensity signal and sends a first comparison signal after the light intensity signal is smaller than a first light intensity reference signal set therein;

[0018] A second voltage comparison circuit, whose input terminal is coupled to the output terminal of the light intensity sensor, responds to the light intensity signal and sends a second comparison signal after the light intensity signal is greater than a second light intensity reference signal set therein;

[0019] A microcontroller, wherein the input end of the microcontroller is respectively coupled to the output end of the light intensity sensor, the output end of the first voltage comparison circuit, and the output end of the second voltage comparison circuit, the microcontroller maintains a single output video image signal of the infrared camera through a multiplexer in response to the first comparison signal and the light intensity signal, the microcontroller maintains a single output video image signal of the optical filter camera through a multiplexer in response to the second comparison signal and the light intensity signal, and the microcontroller maintains a single output video image signal of the conventional camera through a multiplexer in response to the light intensity signal.

[0020] Preferably, the first voltage comparison circuit and the second voltage comparison circuit both include a voltage comparator LM358.

[0021] Preferably, the microcontroller is an STM32 single-chip microcomputer.

[0022] The utility model has the following beneficial effects:

[0023] The video signal separation and processing circuit of the utility model automatically identifies the ambient light, controls the multiplexer to select the appropriate camera through the light intensity sensor and the voltage comparator, and displays the image on the display after FPGA processing, thereby realizing fully automated high-quality video acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural block diagram of the utility model;

[0026] Figure 2 The wiring diagram of the first voltage comparison circuit and the second voltage comparison circuit in the utility model;

[0027] Figure 3 This is the wiring diagram of the multiplexer in the utility model.

[0028] 1. Light intensity sensor; 2. Microcontroller; 3. First voltage comparison circuit; 4. Second voltage comparison circuit; 5. Multiplexer; 6. Conventional camera; 7. Infrared camera; 8. Optical filter camera; 9. FPGA chip; 10. Display. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present utility model, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.

[0033] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] A video signal separation processing circuit, such as Figure 1 As shown, it includes a conventional camera 6, an infrared camera 7, an optical filter camera 8, Figure 3 As shown, a multiplexer 5, a light intensity detection circuit, an FPGA chip 9, and a display 10.

[0036] The conventional camera 6 is used to capture images and output video image signals; the infrared camera 7 is used to capture images in a low light intensity environment and output video image signals; the optical filter camera 8 is used to capture images in a high light intensity environment and output video image signals; the input ends of the multiplexer 5 are respectively coupled to the output ends of the conventional camera 6, the infrared camera 7, and the optical filter camera 8, and are used to switch the conventional camera 6, the infrared camera 7, or the optical filter camera 8 to output a single video image signal; the output end of the light intensity detection circuit is coupled to the controlled end of the multiplexer 5, and the light intensity detection circuit controls the multiplexer 5 to switch the conventional camera 6, the infrared camera 7, or the optical filter camera 8 to output a single video image signal according to the ambient light intensity; the input end of the FPGA chip 9 is coupled to the output end of the multiplexer 5, and the FPGA chip 9 is used to process the video image signal; the input end of the display 10 is coupled to the output end of the FPGA chip 9, and the display 10 is used to display the video image processed by the FPGA chip 9.

[0037] like Figure 1 and Figure 2 As shown, the light intensity detection circuit includes a light intensity sensor 1, a first voltage comparison circuit 3, a second voltage comparison circuit 4, and a microcontroller 2. The first voltage comparison circuit 3 and the second voltage comparison circuit 4 both include a voltage comparator LM358, and the microcontroller 2 is an STM32 single-chip microcomputer.

[0038] The light intensity sensor 1 collects the ambient light intensity and generates a light intensity signal; the input end of the first voltage comparison circuit 3 is coupled to the output end of the light intensity sensor 1, and responds to the light intensity signal and sends a first comparison signal after the light intensity signal is less than the first light intensity reference signal set therein; the input end of the second voltage comparison circuit 4 is coupled to the output end of the light intensity sensor 1, and responds to the light intensity signal and sends a second comparison signal after the light intensity signal is greater than the second light intensity reference signal set therein; the input end of the microcontroller 2 is respectively coupled to the output end of the light intensity sensor 1, the output end of the first voltage comparison circuit 3, and the output end of the second voltage comparison circuit 4, the microcontroller 2 maintains the infrared camera 7 through a single output video image signal through a multiplexer 5 in response to the first comparison signal and the light intensity signal, the microcontroller 2 maintains the optical filter camera 8 through a single output video image signal through the multiplexer 5 in response to the second comparison signal and the light intensity signal, and the microcontroller 2 maintains the conventional camera 6 through a single output video image signal through the multiplexer 5 in response to the light intensity signal.

[0039] The video signal separation and processing circuit of the utility model realizes the optimization processing of image acquisition by identifying the ambient light intensity. First, the light intensity sensor 1 monitors the ambient light intensity in real time and generates a light intensity signal. These signals are sent to two independent voltage comparators, namely the first voltage comparison circuit 3 and the second voltage comparison circuit 4, which are respectively preset with the first light intensity reference signal and the second light intensity reference signal. The light intensity signal is compared with them to generate the first comparison signal and the second comparison signal. The microcontroller 2 receives these signals and controls the multiplexer 5 according to the different comparison results to select the most suitable camera for image acquisition: the infrared camera 7 is suitable for low light environment, the optical filter camera 8 is suitable for high light environment, and the conventional camera 6 works under normal lighting conditions. The video image signal collected by the selected camera is then sent to the FPGA chip 9 for further processing, and the final processed image is displayed through the display 10 to ensure that high-quality image output can be obtained under different lighting conditions. This process realizes the full automation from ambient light intensity detection to image acquisition, processing and display, and significantly improves the accuracy and efficiency of video image signal processing.

[0040] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A video signal separation processing circuit, characterized in that: include A conventional camera (6), which is used to capture images and output video image signals; An infrared camera (7) is used to capture images in a low light intensity environment and output video image signals; An optical filter camera (8) is used to capture images in a high light intensity environment and output video image signals; A multiplexer (5), each input end of which is respectively coupled to the output end of the conventional camera (6), the infrared camera (7), and the optical filter camera (8), and is used to switch the conventional camera (6), the infrared camera (7), or the optical filter camera (8) to output a single video image signal; A light intensity detection circuit, whose output end is coupled to a controlled end of a multiplexer (5), wherein the light intensity detection circuit controls the multiplexer (5) to switch between a conventional camera (6), an infrared camera (7), or an optical filter camera (8) to output a single video image signal according to the ambient light intensity.

2. A video signal separation processing circuit according to claim 1, characterized in that: It also comprises an FPGA chip (9), the input end of the FPGA chip (9) being coupled to the output end of the multiplexer (5), and the FPGA chip (9) being used for processing the video image signal.

3. A video signal separation processing circuit according to claim 2, characterized in that: It also includes a display (10), the input end of the display (10) is coupled to the output end of the FPGA chip (9), and the display (10) is used to display the video image processed by the FPGA chip (9).

4. The video signal separation processing circuit according to claim 1, characterized in that: The light intensity detection circuit comprises A light intensity sensor (1) which collects ambient light intensity and generates a light intensity signal; A first voltage comparison circuit (3), whose input end is coupled to the output end of the light intensity sensor (1), responds to the light intensity signal and sends a first comparison signal after the light intensity signal is smaller than a first light intensity reference signal set therein; A second voltage comparison circuit (4), whose input end is coupled to the output end of the light intensity sensor (1), responds to the light intensity signal and sends a second comparison signal after the light intensity signal is greater than a second light intensity reference signal set therein; A microcontroller (2), wherein the input end of the microcontroller (2) is respectively coupled to the output end of the light intensity sensor (1), the output end of the first voltage comparison circuit (3), and the output end of the second voltage comparison circuit (4); the microcontroller (2) maintains a single output video image signal of the infrared camera (7) through a multiplexer (5) in response to the first comparison signal and the light intensity signal; the microcontroller (2) maintains a single output video image signal of the optical filter camera (8) through the multiplexer (5) in response to the second comparison signal and the light intensity signal; and the microcontroller (2) maintains a single output video image signal of the conventional camera (6) through the multiplexer (5) in response to the light intensity signal.

5. A video signal separation processing circuit according to claim 4, characterized in that: The first voltage comparison circuit (3) and the second voltage comparison circuit (4) both comprise a voltage comparator LM358.

6. The video signal separation processing circuit according to claim 4, characterized in that: The microcontroller (2) is an STM32 single-chip microcomputer.

Images