A multispectral acquisition device with switchable light source

Abstract

A multispectral acquisition device with switchable light source, electrically connected to a host computer, includes a housing. Inside the housing are a control module, a light source module, and an imaging module, sequentially and electrically connected. One side of the housing has an acquisition area corresponding to the imaging module. The control module parses commands from the host computer and distributes control signals to the light source module and the imaging module. The light source module is configured with multiple colors and surrounds the acquisition area to switch between different color channels. Compared to existing technologies, by arranging the light source module around the acquisition area, multi-angle illumination is achieved. Furthermore, the light source module has multiple colors, and the control module controls the light source module to switch between different color channels. Through multi-angle illumination, light enters from different directions, which can counteract the shadow effect of a single light source, improve image uniformity, ensure image edge clarity, and reduce the risk of misdiagnosis.

Description

Technical Field

[0001] This utility model relates to the field of image acquisition technology, specifically to a multispectral acquisition device with switchable light sources. Background Technology

[0002] Multispectral imaging technology illuminates a target with light sources of different wavelengths and, combined with multispectral imaging equipment, acquires reflection information at different wavelengths to obtain rich image features of the target. In the medical field, the demand for multispectral imaging equipment focuses on high-precision tissue imaging, real-time pathological analysis, and non-invasive diagnostic support. Its core function is to reveal biological tissue features that are difficult to observe using traditional imaging techniques by capturing light reflection or fluorescence signals at different wavelengths. In applications such as tongue diagnosis and facial skin detection, it is often necessary to acquire images under different lighting conditions to analyze color, texture, and physiological characteristics. However, traditional equipment relies on mechanical turntables or complex optical systems for light source switching, resulting in slow switching speeds, large equipment size, poor system stability, and inflexible channel control methods, making it difficult to achieve rapid, directional, multi-band light source switching and image acquisition linkage control.

[0003] To address the aforementioned issues, Chinese Patent Application No. 201910338775.2 discloses a multispectral tongue image acquisition device. This device includes a detection cavity and an acquisition window located at the front end of the detection cavity. The detection cavity houses a light source assembly and a camera module. The light source assembly includes a light source plate arranged facing the acquisition window, with multiple light sources on the plate, one of which is a full-spectrum light source, and the others are narrow-band light sources. The light source assembly can switch between any of these light sources. The camera module is used to acquire images of the light emitted by the light source assembly and reflected back onto the tongue located at the acquisition window, thereby obtaining corresponding spectral imaging information. Chinese Patent Application No. 201620755066.6 discloses a medical multispectral dermatoscope. This multispectral dermatoscope includes a front-end lens and a rear-end handle that are detachably connected to each other. The handle is cylindrical, and its rear end has a data cable for connection to a host computer. The lens includes a polarizing lens, an LED white light source, a long-wave ultraviolet light source, and a near-infrared light source.

[0004] In the aforementioned prior art, the light source board is arranged facing the acquisition window, and multiple light sources are set on the light source board, resulting in the same orientation of the multiple light sources. This leads to a simple light source structure, which easily forms shadows on the tissue surface. Especially for uneven structures (such as skin wrinkles), the shadows will cover up the real tissue features, resulting in blurred image edges or uneven brightness, increasing the risk of misdiagnosis. Utility Model Content

[0005] The present invention aims to overcome the defects in the prior art and provide a multispectral acquisition device with a switchable light source that surrounds the image acquisition, improves the image acquisition effect, and reduces image edge blurring or uneven brightness.

[0006] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a multispectral acquisition device with switchable light source, electrically connected to a host computer, including a housing, wherein a control module, a light source module, and an imaging module are arranged in sequence and electrically connected inside the housing, and an acquisition area corresponding to the imaging module is provided on one side of the housing; the control module is used to parse the host computer instructions and distribute the control signals to the light source module and the imaging module, and the light source module is set to multiple colors and arranged around the acquisition area for switching different color channels.

[0007] As a preferred embodiment of this utility model, the light source module includes several multi-color channel light sources and a white light source. The white light source is disposed in the middle of the housing, and the several multi-color channel light sources are disposed around the white light source on the inner wall of the housing.

[0008] As a preferred embodiment of this utility model, the white light source has a circular structure and is positioned directly opposite the collection area.

[0009] As a preferred embodiment of this utility model, the white light source is provided with a plurality of support rods for supporting the white light source, and the plurality of support rods are all fixedly connected to the inner wall of the housing.

[0010] As a preferred embodiment of this utility model, the plurality of multi-color channel light sources are configured as red, green, blue, and near-infrared color channel light sources.

[0011] As a preferred embodiment of the present invention, the imaging module includes a multispectral camera and a multispectral lens connected to the multispectral camera. The multispectral camera is disposed on the outer wall of the housing and extends through the housing into the housing.

[0012] In a preferred embodiment of this invention, the multispectral lens is coaxially arranged with the white light source.

[0013] In a preferred embodiment of this utility model, the collection area is a collection groove formed on the side wall of the housing, and the size of the collection groove gradually decreases from top to bottom.

[0014] As a preferred embodiment of this utility model, the bottom of the collection slot is provided with a mounting base, and a base support is connected to the mounting base.

[0015] As a preferred embodiment of this utility model, the control module is disposed on the outer wall of the housing, and the control module is provided with several wires that are connected to the light source module and the imaging module one by one.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting the light source module around the acquisition area, multi-angle light source illumination is achieved. The light source module is equipped with multiple colors, and the control module controls the light source module to switch between different color channels. Through multi-angle illumination, the light enters from different directions, which can cancel the shadow effect of a single light source, improve image uniformity, ensure image edge clarity, and reduce the risk of misdiagnosis. 2. Furthermore, the light source module includes a white light source and a multi-color channel light source. The multi-color channel light source is set to four colors: red, green, blue, and near-infrared. The control module can quickly switch the light source on and off, and supports multiple band combination lighting. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram showing the position and structure of the light source module and the imaging module of this utility model; Figure 3 This is a schematic diagram of the imaging module of this utility model; Figure 4 This is a structural diagram of the control module. Reference numerals: housing 1, acquisition area 101, acquisition slot 1011, mounting base 1012, connecting column 1013, base 1014, control module 2, wire 201, light source module 3, multi-color channel light source 301, white light source 302, support rod 3021, imaging module 4, multispectral camera 401, multispectral lens 402. Detailed Implementation

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] like Figures 1-4 As shown, a multispectral acquisition device with switchable light source is electrically connected to a host computer. It includes a housing 1, and a control module 2, a light source module 3, and an imaging module 4 are electrically connected in sequence inside the housing 1. The imaging module 4 has an acquisition area 101 on one side of the housing 1. The control module 2 is used to parse the host computer instructions and distribute the control signals to the light source module 3 and the imaging module 4. The light source module 3 is set to multiple colors and is arranged around the acquisition area 101 to switch different color channels.

[0020] Furthermore, the control module 2 includes an FPGA unit and a communication interface for data transmission and command interaction with the host computer. After the light source module 3 completes the light source switching, the imaging module 4 acquires images of the acquisition area 101 according to the control signal. The acquisition area 101 is the placement area of ​​the target being acquired. The light source module 3 is set on the inner wall of the housing 1 and surrounds the acquisition area 101, thereby forming light sources at different angles, realizing multi-angle illumination. The light source module 3 is equipped with multiple colors, and the control module 2 controls the light source module 3 to switch different color channels. Through multi-angle illumination, light enters from different directions, which can cancel the shadow effect of a single light source, improve image uniformity, ensure image edge clarity, and reduce the risk of misdiagnosis.

[0021] The light source module 3 includes several multi-color channel light sources 301 and a white light source 302. The white light source 302 is located in the middle of the housing 1. Several multi-color channel light sources 301 are arranged around the white light source 302 on the inner wall of the housing 1. Furthermore, the housing 1 has a rectangular structure. Several multi-color channel light sources 301 are arranged on the four inner walls of the housing 1. The white light source 302 is a ring-shaped white LED light source and is fixed at the center of the housing 1.

[0022] In addition, the white light source 302 has a circular structure and is positioned directly opposite the acquisition area 101. The imaging module 4 acquires images of the acquisition area 101 through the inner ring of the circular structure.

[0023] The white light source 302 is provided with several support rods 3021 for supporting the white light source 302. The support rods 3021 are all fixedly connected to the inner wall of the housing 1. Furthermore, the support rods 3021 are provided on the back of the white light source 302, and the white light source 302 is fixed by the support rods 3021.

[0024] Several multi-color channel light sources 301 are configured as red, green, blue and near-infrared four-color channel light sources. Further, the light source module 3 includes four color channel light sources, namely red light, green light, blue light and near-infrared light sources, as well as a ring white LED. Through the digital signal control circuit in the control module 2, the switching of each light source can be completed quickly, supporting multiple band combination lighting.

[0025] The imaging module 4 includes a multispectral camera 401 and a multispectral lens 402 connected to the multispectral camera 401. The multispectral camera 401 is disposed on the outer wall of the housing 1 and extends through the housing 1 into the housing 1. Furthermore, the imaging module 4 is composed of an integrated multispectral camera 401 and a multispectral lens 402, which can quickly image in a specified band and trigger the acquisition action through the control module 2 to ensure synchronization with the light source switching action. The multispectral camera 401 is an image acquisition device that integrates multiple band filters and can capture image information at different wavelengths.

[0026] The multispectral lens 402 is coaxially arranged with the white light source 302. The multispectral lens 402 acquires images through the inner ring of the white light source 302, thus avoiding interference caused by the image acquisition of the white light source 302.

[0027] The acquisition area 101 is an acquisition slot 1011 opened on the side wall of the housing 1. The size of the acquisition slot 1011 gradually decreases from top to bottom. Furthermore, the acquisition slot 1011 is set on the side wall of the housing 1, and the height of the acquisition slot 1011 is the same as that of the multispectral lens 402. The shape and size of the acquisition slot 1011 are adapted to the shape and size of the human face to ensure that there is no obstruction when acquiring images of the face.

[0028] The bottom of the acquisition slot 1011 is provided with a mounting base 1012, and a base support 1014 is connected to the mounting base 1012. Furthermore, the mounting base 1012 is provided with an installation hole, and the bottom of the base support 1014 is provided with a connecting post 1013. The structure of the installation hole and the connecting post 1013 are adapted to each other. The connecting post 1013 is inserted into the installation hole, and the cross-section of the connecting post 1013 is a non-circular structure to ensure that the base support 1014 will not rotate after the connecting post 1013 is inserted into the installation hole. The base support 1014 is a platform for placing the target being acquired. It is made of matte black material to effectively avoid ambient light interference and ensure the contrast and consistency of the acquired image.

[0029] The control module 2 is located on the outer wall of the housing 1, and the control module 2 is provided with several wires 201 that are connected to the light source module 3 and the imaging module 4 one by one. The control module 2 is electrically connected to the light source module 3 and the imaging module 4 through the wires 201, thereby realizing the transmission of control signals.

[0030] In the acquisition process, the host computer sends control commands → control module 2 parses the commands → switches the light source channel → imaging module 4 acquires the image → data is transmitted back to the host computer, completing the acquisition of one frame of multispectral image.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0032] Although this document frequently uses reference numerals from the figures, such as housing 1, acquisition area 101, acquisition slot 1011, mounting base 1012, connecting column 1013, base 1014, control module 2, wire 201, light source module 3, multi-color channel light source 301, white light source 302, support rod 3021, imaging module 4, multispectral camera 401, and multispectral lens 402, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A multispectral acquisition device of switchable light source, electrically connected with a host computer, characterized in that, The device includes a housing (1), which contains a control module (2), a light source module (3), and an imaging module (4) that are electrically connected in sequence. The housing (1) has an acquisition area (101) corresponding to the imaging module (4) on one side. The control module (2) is used to parse the host computer instructions and distribute the control signals to the light source module (3) and the imaging module (4). The light source module (3) is set to multiple colors and is arranged around the acquisition area (101) to switch different color channels.

2. A multispectral acquisition device of a switchable light source according to claim 1, characterized in that, The light source module (3) includes several multi-color channel light sources (301) and a white light source (302). The white light source (302) is located in the middle of the housing (1), and several multi-color channel light sources (301) are arranged around the white light source (302) on the inner wall of the housing (1).

3. A multispectral acquisition device of a switchable light source according to claim 2, characterized in that, The white light source (302) has a circular structure and is positioned directly opposite the acquisition area (101).

4. A multispectral acquisition device of switchable light source according to claim 2, characterized in that, The white light source (302) is provided with several support rods (3021) for supporting the white light source (302), and the several support rods (3021) are all fixedly connected to the inner wall of the housing (1).

5. A multispectral acquisition device of switchable light source according to claim 2, characterized in that, Several of the multi-color channel light sources (301) are configured as red, green, blue and near-infrared color channel light sources.

6. A multispectral acquisition device of switchable light source according to claim 2, characterized in that, The imaging module (4) includes a multispectral camera (401) and a multispectral lens (402) connected to the multispectral camera (401). The multispectral camera (401) is disposed on the outer wall of the housing (1) and extends through the housing (1) into the housing (1).

7. A multispectral acquisition device of a switchable light source according to claim 6, characterized in that, The multispectral lens (402) is coaxially arranged with the white light source (302).

8. The multispectral acquisition device with switchable light source according to claim 1, characterized in that, The collection area (101) is a collection groove (1011) opened on the side wall of the housing (1), and the size of the collection groove (1011) gradually decreases from top to bottom.

9. A multispectral acquisition device of a switchable light source according to claim 8, characterized in that, The bottom of the collection slot (1011) is provided with a mounting base (1012), and a base support (1014) is connected to the mounting base (1012).

10. A multispectral acquisition device of a switchable light source according to claim 1, characterized in that, The control module (2) is located on the outer wall of the housing (1), and the control module (2) is provided with several wires (201) that are connected to the light source module (3) and the imaging module (4) one by one.

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