Multi-zone multi-spectral detection device and detection method thereof, electronic device

Abstract

The application discloses a multi-zone multi-spectrum detection device, a multi-zone multi-spectrum detection method thereof and electronic equipment. The multi-zone multi-spectrum detection device has a plurality of detection zones, and the detection zones are provided with a plurality of spectral channels of different wave bands. The length of a single-frame detection window of each spectral channel is a preset length. The multi-zone multi-spectrum detection method comprises adjusting the actual detection length in the single-frame detection window of the spectral channel according to the light intensity detected by the spectral channel. The multi-zone multi-spectrum detection method can reduce power consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of multi-zone multi-spectrum detection, in particular to a multi-zone multi-spectrum detection device and a detection method thereof and an electronic device BACKGROUND

[0002] The essence of photography is to record the light information at that time. At present, the light signal is converted into an electric signal based on a photodiode for detection and recording by a CCD (Charge-Coupled Device) or a CMOS (Complementary Metal-Oxide Semiconductor) device. However, due to the working principle of the photodiode, these methods can only record the brightness information at different positions according to the light intensity, and cannot capture color information.

[0003] The color distinction of light is determined by the wavelength of light. Different colors of light correspond to different wave bands, for example, the wavelength of red light is about 620nm-780nm, the wavelength of green light is about 490nm-560nm, and the wavelength of near-infrared light is about 780nm-1500nm. The photodiode can only detect the intensity of light energy, and cannot distinguish different wavelengths. However, the human eye is different. The sensitivity of the human eye to different wavelengths of light energy is different. For example, if the above three wave bands of light are included in the ambient light, and the light intensity of each wave band is the same, the green light energy perceived by the human eye will be significantly higher than the red light energy, and the infrared light energy cannot be perceived by the human eye. The purpose of photography is to restore the light and shadow information that can be perceived by the human eye at that time. However, due to the undifferentiated recording of the photodiode to different wavelengths of light, the photograph and the actual light and shadow effect seen are inconsistent, which is called color cast.

[0004] Under the current background of increasing demand for photography in smart phones and other intelligent terminal devices, the demand for multi-spectrum detection of ambient light by mobile phone manufacturers is also increasingly urgent. Multi-spectrum detection is to detect different wavelengths of light signals in ambient light, record the size of light energy of each wave band, and record the component information of each wave band in the ambient light at that time. Subsequently, the intelligent terminal device can use this information to correct the photographed picture by algorithm, effectively restoring the light conditions perceived by the human eye at the time when the image was recorded.

[0005] Multi-zone multi-spectrum imaging can perform multi-spectrum detection on different regions, and the imaging effect is better, but multi-zone multi-spectrum imaging requires more spectral channels, and the power consumption of the working process is large.

[0006] How to reduce the power consumption of multi-zone multi-spectrum detection is a problem to be solved at present. SUMMARY

[0007] In view of this, the application provides a multi-zone multi-spectrum detection device and a detection method thereof and an electronic device to solve the problem of high power consumption of the existing multi-zone multi-spectrum detection device.

[0008] The application provides a multi-zone multi-spectrum detection method of a multi-zone multi-spectrum detection device, the multi-zone multi-spectrum detection device has a plurality of detection zones, the detection zones are provided with a plurality of spectral channels of different wave bands, and the length of a single-frame detection window of each spectral channel is a preset length; the multi-zone multi-spectrum detection method comprises: adjusting the actual detection length in the single-frame detection window of the spectral channel according to the light intensity detected by the spectral channel.

[0009] Optionally, the method for adjusting the actual detection length in the single-frame detection window of the spectral channel according to the light intensity detected by the spectral channel comprises: when the light intensity detected by the spectral channel is greater than a first threshold, the actual detection length is less than the preset length; and when the light intensity detected by the spectral channel is less than or equal to the first threshold, the actual detection length is equal to the preset length.

[0010] Optionally, the actual detection length is t1, the preset length is t0, the actual detection length t1=t0 / p, and p≥1.

[0011] Optionally, different first thresholds are configured for the detection zones at different positions.

[0012] Optionally, different first thresholds are configured for the spectral channels of different wave bands.

[0013] Optionally, the method for adjusting the actual detection length comprises: detecting a detection signal output by the spectral channel, stopping the detection when the amplitude of the detection signal increases to a preset amplitude, the preset amplitude corresponding to the first threshold corresponding to the spectral channel, and continuing the detection until the single-frame detection window ends when the amplitude of the detection signal is less than or equal to the preset amplitude.

[0014] Optionally, the method for adjusting the actual detection length comprises: pre-detecting the light intensity through the spectral channel and determining the actual detection length according to the detected light intensity.

[0015] Optionally, the method further comprises: collecting induced charges generated by spectral channels of the same wave band and having light intensities less than a second threshold in different detection zones into one spectral channel, and detecting by the one spectral channel.

[0016] The application further provides a multi-zone multi-spectrum detection device, comprising: a plurality of detection zones, the detection zones being provided with a plurality of spectrum channels of different wave bands, a single-frame detection window of each spectrum channel having a preset time length; a detection control module connected to the plurality of detection zones, used for adjusting an actual detection time length within the single-frame detection window of a spectrum channel according to a light intensity detected by the spectrum channel.

[0017] The application further provides a multi-zone multi-spectrum detection device, comprising: a plurality of detection zones, the detection zones being provided with a plurality of spectrum channels of different wave bands, a single-frame detection window of each spectrum channel having a preset time length; a memory used for storing a computer program; a processor connected to the plurality of detection zones and the memory, the computer program being executed by the processor to realize the multi-zone multi-spectrum detection method according to any one of the above.

[0018] An electronic device, characterized in comprising the multi-zone multi-spectrum detection device according to any one of the above or capable of realizing the multi-zone multi-spectrum detection method according to any one of the above.

[0019] The multi-zone multi-spectrum detection method according to the application utilizes the characteristics that the application scene has a wide light intensity range coverage and different color and position spectrum detection accuracies are different, flexibly selects the opening time and number of spectrum channels, so that the spectrum channels can meet the accuracy requirements under the conditions of strong or weak light, and effectively reduce the power consumption required for detection. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 is a distribution diagram of the detection zones of the multi-zone multi-spectrum detection method according to an embodiment of the application;

[0022] Figure 2 is a distribution diagram of the spectrum channels in the detection zones of the multi-zone multi-spectrum detection method according to an embodiment of the application;

[0023] Figure 3 is a diagram of the single-frame detection window and the actual detection time length of the multi-zone multi-spectrum detection method according to an embodiment of the application;

[0024] Figure 4a is a diagram of the relationship between the light intensity and the actual detection time length according to an embodiment of the application;

[0025] Figure 4b This is a schematic diagram illustrating the relationship between light intensity and actual detection time according to another embodiment of this application;

[0026] Figure 4c This is a schematic diagram illustrating the relationship between light intensity and actual detection time according to another embodiment of this application;

[0027] Figure 5a This is a schematic diagram of conventional detection performed on four spectral channels of the same wavelength band according to an embodiment of this application;

[0028] Figure 5b This is a schematic diagram of four spectral channels of the same wavelength band being detected in charge-combining mode according to an embodiment of this application;

[0029] Figure 6 This is a schematic diagram of the detection signals of each spectral channel after four spectral channels of the same wavelength band are detected in charge-combining mode according to an embodiment of this application. Detailed Implementation

[0030] As described in the background section, existing multi-region multispectral detection technologies consume a significant amount of power.

[0031] Please refer to Figure 1 This is a schematic diagram of the detection area distribution for multi-zone multispectral detection according to an embodiment of the present invention.

[0032] To achieve multi-region multispectral detection, it is necessary to increase the multispectral detection area, for example, by dividing the imaging area into... Figure 1 The example shows 7*5 detection areas. Each area is further divided into multiple spectral channels corresponding to different wavelengths, to detect light signal energy at multiple different wavelengths (colors). Figure 1 In the example, signals from nine different wavelength bands are detected in each region. The spectral channels include both devices that perform photoelectric conversion for specific wavelength bands (e.g., photodiodes) and processing circuitry connected to these devices to process the charge generated during photoelectric conversion to produce a detection signal. Each region and each wavelength band within a region requires a corresponding spectral channel with specific light intensity. For example... Figure 1 This requires 7*5*9 = 341 spectral channels, each outputting a detection signal. Therefore, multi-zone multispectral detection necessitates a large number of detection channels operating simultaneously. Furthermore, the energy variation range of different wavelengths is significant under varying environments, thus requiring each detection channel to possess a large dynamic measurement range.

[0033] Therefore, the multi-zone multi-spectrum detection requires a large number of spectral channels to work simultaneously, and each channel has a high detection accuracy requirement. All spectral channels need to be turned on at the same time, and the ambient environment light intensity energy in each waveband needs to be detected in real time without stopping. This requires a large power consumption.

[0034] To solve the above problems, the present application proposes a new multi-zone multi-spectrum detection device and detection method, which takes advantage of the characteristics of the application scene that the light intensity range is wide and the spectral detection accuracy requirements for different colors and different positions are different, and flexibly selects the opening time and number of spectral channels, so that it can meet the accuracy requirements under the conditions of strong or weak light, while effectively reducing the power consumption required for detection.

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. In the case of no conflict, each of the following embodiments and its technical features can be combined with each other.

[0036] The multi-spectrum detection method uses a multi-spectrum detection device, as shown in Figure 2 The imaging area 100 is divided into several detection areas, and the detection areas are provided with several spectral channels of different wavebands. The length of the single-frame detection window of each spectral channel is a preset length. The multi-spectrum detection method comprises: adjusting the actual detection time length in the single-frame detection window of the spectral channel according to the light intensity detected by the spectral channel.

[0037] As multi-spectrum detection, the spectral channels arranged in each detection area are usually more than 4. The more the spectral channels, the shorter the wavelength range recorded by each spectral channel, and the richer the spectral information obtained by each detection area.

[0038] In the embodiment shown in Figure 2 In the embodiment shown in

[0039] In other embodiments, different numbers and / or different wavebands of spectral channels can be provided in different positions of the detection region, according to the precision or waveband requirements of the multispectral detection at different positions in each imaging region. In some embodiments, the imaging region 100 can be divided into m*n (m rows and n columns) detection regions, each of which has k spectral channels, so that there are n*m*k spectral channels in total.

[0040] The corresponding positions of each spectral channel and the pixel positions of the imaging are correspondingly related. Ideally, each detection region corresponds to each pixel. However, due to the limitations of existing film coating (filter film) technology, it is impossible to achieve that each pixel corresponds to each spectral channel, that is, the resolution of the spectral channel is not as high as the imaging resolution. Usually, a fixed group of pixels at a fixed position corresponds to a fixed spectral channel. The smaller the size of a single detection region, the fewer the corresponding imaging pixels, and the higher the resolution of the multispectral detection, and the higher the resolution of the spectral change.

[0041] Each spectral channel converts the received light signal into electric charge through photoelectric conversion, accumulates in a certain time, and then processes the accumulated electric charge to form a detection signal. In the detection process, the electric charge generated by each spectral channel is obtained by opening a detection window, so as to obtain the detection data of each spectral channel. Each detection window corresponds to one frame of data. Assuming that the time length of a single frame of detection window of each channel is a preset time length t0. For a whole frame of data, that is, n*m*k spectral channels are opened at the same time, in t0 time, the light intensity energy of each waveband (color) in each detection region can be detected, that is, the single frame output rate (frame rate) is (n*m*k detection data) / t0.

[0042] In some embodiments, the method for adjusting the actual detection time length of a single frame of detection of a spectral channel according to the light intensity detected by the spectral channel includes: when the light intensity detected by the spectral channel is greater than a first threshold, the actual detection time length is less than the preset time length; and when the light intensity detected by the spectral channel is less than or equal to the first threshold, the actual detection time length is equal to the preset time length.

[0043] In actual application scenarios, environmental light detection often covers a very large light intensity range. Since each spectral channel has a noise floor, in the case of weak light intensity, the actual detection signal is small, which can lead to a low signal-to-noise ratio. In the case of strong light intensity, the signal energy collected in a very short time can meet the signal-to-noise ratio requirement. Therefore, the actual detection time length of each spectral channel can be set according to the light intensity. In the case of weak light intensity, the actual detection time length is prolonged; in the case of strong light intensity, the actual detection time length can be shortened, thereby saving power consumption.

[0044] In some embodiments, the preset duration of the single-frame detection window is the longest time of the actual detection duration, which is set as t0; when the light intensity is greater than the first threshold Th1, a shorter actual detection duration t1 is selected, which is less than the preset duration t0, for example, t1=t0 / p, p>1. Since the light intensity is large, even if the actual detection duration is shortened, sufficient signal energy can still be collected to achieve sufficient signal-to-noise ratio. Since the single-frame output time, i.e., the single-frame detection window, is still t0, and the actual working time of the spectral channel is t0 / p, the extra time does not need to work, so power consumption can be saved. Please refer to Figure 3 FIG. 1 is a schematic diagram of a single-frame detection window and an actual detection duration of a spectral channel according to the present application.

[0045] The first threshold Th1 and the actual detection duration t1 can be set according to the noise floor of the spectral channel, at least to meet the requirement that when the light intensity is the first threshold Th1, the actual detection time is t1, which can meet the signal-to-noise ratio requirement.

[0046] Please refer to Figure 4a In some embodiments, when the light intensity is less than or equal to the first threshold Th1, the actual detection duration is the duration t0 of the single-frame detection window; when the light intensity is greater than the first threshold Th1, the actual detection duration is t1, which is less than the duration t0 of the single-frame detection window. When the light intensity is greater than the first threshold, the actual detection duration is fixed as t1 regardless of the actual size of the light intensity.

[0047] In some embodiments, the actual detection duration can also be a variable value, and when the light intensity is greater than the first threshold, the actual detection duration can be further reduced as the light intensity becomes larger.

[0048] In some embodiments, when the light intensity is less than or equal to the first threshold, the actual detection duration is the duration of the single-frame detection window; when the light intensity is greater than the first threshold, the actual detection duration is less than the duration of the single-frame detection window, and the actual detection duration decreases in steps as the light intensity becomes larger. For example, the range of light intensity greater than the first threshold is divided into multiple subintervals, and each interval corresponds to the same actual detection time. Please refer to Figure 4b In this embodiment, the range of light intensity greater than the first threshold Th11 is divided into multiple intervals, the actual detection duration is t11 when the light intensity is in the interval of Th11-Th12, the actual detection duration is t12 when the light intensity is in the interval of Th12-Th13, and the actual detection duration is t13 when the light intensity is greater than Th13.

[0049] In some embodiments, when the light intensity is greater than the first threshold, the actual detection duration is less than the duration of the single-frame detection window, and the actual detection duration decreases in a curve as the light intensity becomes larger. The curve can be set according to the actual situation, for example, it can be a first-order, second-order or multiple-order curve. Please refer toFigure 4c In this embodiment, the actual detection time linearly decreases with the increase of light intensity in the range of light intensity greater than the first threshold Th1, until the minimum detection time t10.

[0050] Since the light intensity distribution range is different in different regions within the detection field of view, the actual detection time corresponding to the spectral channel at different positions can be different.

[0051] In some embodiments, the method of adjusting the actual detection time includes detecting the detection signal output by the spectral channel, and stopping detection when the amplitude of the detection signal increases to a preset amplitude; the preset amplitude corresponds to the first threshold of the spectral channel; and continuing detection until the end of the single-frame detection window when the amplitude of the detection signal is less than or equal to the preset amplitude. Since the light energy is converted into charge during photoelectric conversion, the longer the light receiving time, the more the charge generated, and the detection signal amplitude will gradually increase. The greater the light intensity, the shorter the time required to reach the preset amplitude. Corresponding to the setting method of the first threshold, the preset amplitude can also be set according to the noise floor of the spectral channel. When the detection signal reaches the preset amplitude, the signal-to-noise ratio requirement of detection can be met, and detection can be stopped. For the case of high light intensity, the amplitude of the detection signal can reach the preset amplitude when the actual detection time does not reach the preset time of the single-frame detection window, and the actual detection time of each frame of data output can be shortened to reduce power consumption. For the case of low light intensity, detection needs to be continued until the end of the single-frame detection window to obtain a higher detection signal amplitude and improve the signal-to-noise ratio. This method can simultaneously turn on all spectral channels, and then each spectral channel decides when to end detection according to its actual situation. The longest actual detection time does not exceed the preset time t0 of the window. This way is relatively simple to implement, but the peak power consumption is high.

[0052] In some embodiments, the method of adjusting the actual detection time length comprises: pre-detecting the light intensity passing through the spectral channel, and determining the actual detection time length according to the detected light intensity. The pre-detection can be a short-time low-precision pre-detection, and the light intensity can be calculated according to the pre-detection time and the obtained detection signal amplitude. The actual detection time length can be set by comparing the light intensity with the threshold value. The pre-detection can be performed after each single-frame detection window is opened. The actual detection time length can be set according to the pre-detection result, and the subsequent actual detection can be continued. The pre-detection is part of the actual detection, and the detection signal of the pre-detection process is part of the detection signal obtained in the actual detection process. In other embodiments, the pre-detection can be performed in an additional time period before the single-frame detection window is opened. The pre-detection signal is not part of the actual detection signal. After the actual detection time is determined by the pre-detection, each spectral channel can be opened in time, that is, the number of spectral channels opened at the same time is small, and the peak power consumption is low.

[0053] The average power consumption of the above various methods does not differ much. The most suitable method can be selected to shorten the detection time of each channel and reduce the average power consumption according to the actual circuit implementation conditions.

[0054] For different spectral channels, different first thresholds can be set.

[0055] In some embodiments, different first thresholds can be configured for different spectral channels of different wavebands. Since the perception sensitivity of the human eye to light intensity of different wavebands is very different, although each detection area needs to detect multiple different wavebands, that is, multiple spectral channels for different colors receive light intensity energy, the required signal-to-noise ratio for each color is actually different. For example, for green light which is most sensitive to the human eye, the corresponding spectral channel requires the highest signal-to-noise ratio. For blue light with a lower wavelength and red light with a higher wavelength, the perception sensitivity of the human eye is lower, and even if the detection accuracy of the corresponding spectral channel is slightly lower, the impact on the perception of the human eye is not large. Therefore, different first thresholds can be set for different spectral channels of different wavebands. For spectral channels of colors with lower sensitivity requirements, the first threshold can be set lower to reduce the actual detection time of the corresponding spectral channel as much as possible. For spectral channels of colors with higher sensitivity requirements, the first threshold can be set higher to increase the signal-to-noise ratio as much as possible and improve the sensitivity. The higher the sensitivity requirement, the larger the corresponding first threshold.

[0056] In some embodiments, different first thresholds can also be configured for different detection regions at different positions. The multi-zone multi-spectral detection result is used to algorithmically correct the photo taken under the current ambient light condition to avoid the influence of color cast. The requirements for color cast compensation accuracy of different imaging regions are often different. For example, due to the existence of lens distortion and other factors, the accuracy requirement for the edge and corner positions of the photo is relatively low. In some cases, the user's attention to different imaging regions is different. For example, the attention to the center position of the imaging region is greater than the attention to the edge position of the imaging region, which requires that the detection accuracy of each spectral channel in the detection region at the center position be greater than the detection accuracy of each spectral channel in the detection region at the edge position. Therefore, the spectral channel falling in the region with lower accuracy requirement can be set with a relatively low first threshold to reduce the detection time and effectively reduce the power consumption while still meeting the accuracy requirement of the region.

[0057] In other embodiments, different spectral channels in the same detection region can correspond to different first thresholds, and the same spectral channels in different detection regions can also correspond to different first thresholds, which can be set according to different requirements. Preferably, the settings can be made in combination with the requirements of human eye sensitivity to different wavelengths and sensitivity at different positions.

[0058] In some embodiments, when the light intensity received by the spectral channel is less than the second threshold, the light intensity is too low, and even if the actual detection time of a single frame of the spectral channel is equal to the detection window time of a single frame, the detection signal amplitude obtained is still small, the signal-to-noise ratio is low, and the sensitivity requirement cannot be met. In this case, the induced charges generated by the spectral channels of the same waveband in different detection regions can be collected into one spectral channel, and the detection is performed by the one spectral channel. At this time, for the detection circuit of the spectral channel, the amplitude of the input signal increases, but the noise of the spectral channel does not increase, thereby achieving the effect of improving the signal-to-noise ratio. Moreover, the number of spectral channels (i.e., the detection circuit of the spectral channel) that need to be turned on is also reduced, and accordingly, the total power consumption required for detection is also reduced. Preferably, the charges of the same waveband of adjacent detection regions are collected, which is conducive to the implementation on the circuit.

[0059] Please refer to Figure 5a In the normal mode, the charges generated by the four spectral channels A1, B1, C1, and D1 of the same waveband are detected by the respective detection circuits a1, b1, c1, and d1, and the detection signals Q11, Q21, Q31, and Q41 are output, respectively.

[0060] Please refer to Figure 5bWhen the light intensity received by the four spectral channels is less than the second threshold, the photoelectric conversion devices of the four spectral channels are electrically connected, so that the charges generated by the four spectral channels A1, B1, C1 and D1 are collected into the detection circuit of one of the spectral channels. Taking the collection into the detection circuit b1 as an example, a detection signal Q1 is output through the detection circuit b1, and the detection circuits of the other spectral channels do not work, the number of opened spectral channels is reduced, and the input signal of the spectral channel becomes four times the original, while the noise does not increase, and the signal-to-noise ratio can be improved by four times. In imaging, the average value of Q1 can be used as the detection signal corresponding to A1, B1, C1 and D1. Please refer to Figure 6 .

[0061] In some embodiments, the charge merging mode and the way of actually selecting the channel detection time can be used at the same time. For example, in a certain environment, the energy of green light is large, and the energy of red light is very low. Then all the green light corresponding spectral channels of the detection areas can be opened, but the actual detection time is very short. The red light detection enters the low-power charge merging mode, and only a few red light spectral channels are needed to be opened to cover the measurement of the red light energy of the whole area, and the opening time of each red light spectral channel is selected as the longest time t0.

[0062] Since the light intensity distribution changes constantly during the detection process, the actual detection time of each spectral channel of each detection area can be adjusted in real time or at regular intervals according to the current light intensity distribution.

[0063] The above multi-zone multi-spectral detection method proposes an energy-saving mode of multi-zone multi-spectral detection that is self-adaptive to the energy of the environment light. The application scene has the characteristics that the light intensity range is wide and the spectral detection accuracy requirements for different colors and different positions are different. The opening time and the number of opened detection channels are flexibly selected, so that the accuracy requirements can be met under the conditions of strong or weak light, and the power consumption required for detection is effectively reduced.

[0064] Embodiments of the present application also provide a multi-zone multi-spectral detection device, comprising: a plurality of detection areas, the detection areas are provided with a plurality of spectral channels of different wave bands, and the length of the single-frame detection window of each spectral channel is a preset length; a detection control module connected to the plurality of detection areas, for adjusting the actual detection time in the single-frame detection window of the spectral channel according to the light intensity detected by the spectral channel. The specific working principle and method of the detection control module can be referred to the specific description in the foregoing embodiments, which will not be repeated here.

[0065] The application further provides a multi-zone multi-spectrum detection device, comprising: a plurality of detection zones, the detection zones being provided with a plurality of spectral channels of different wave bands, and a single-frame detection window of each spectral channel having a preset time length; a memory for storing a computer program; and a processor connected to the plurality of detection zones and the memory, the computer program being executable by the processor to implement the multi-zone multi-spectrum detection method according to any one of the above embodiments.

[0066] Embodiments of the application further provide an electronic device comprising the multi-zone multi-spectrum detection device according to any one of the above embodiments or capable of implementing the multi-zone multi-spectrum detection method according to any one of the above embodiments. The electronic device can be a terminal device such as a smartphone, a tablet computer, a smartwatch, etc. having a photographing function, and the multi-zone multi-spectrum detection device of the application can obtain multi-spectrum spectral information to improve the photographing effect. The electronic device can also be a multi-spectrum detection device for spectral detection, and the multi-zone multi-spectrum detection can achieve the effect of spectral imaging.

[0067] The above description is merely an embodiment of the application and does not limit the patent scope of the application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, such as the mutual combination of technical features among the embodiments, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the application.

Claims

1. A multi-zone multispectral detection method for a multi-zone multispectral detection device, characterized in that, The multi-zone multispectral detection device has several detection zones, and each detection zone is equipped with several spectral channels of different wavelengths. The duration of a single-frame detection window for each spectral channel is a preset duration. The multi-region multispectral detection method includes: Based on the light intensity detected by the spectral channel, the actual detection duration within a single-frame detection window of that spectral channel is adjusted, including: when the light intensity detected by the spectral channel is greater than a first threshold, the actual detection duration is less than the preset duration; when the light intensity detected by the spectral channel is less than or equal to the first threshold, the actual detection duration is equal to the preset duration; wherein, the method for adjusting the actual detection duration includes: detecting the detection signal output by the spectral channel; when the amplitude of the detection signal increases to a preset amplitude, detection is stopped; the preset amplitude corresponds to the first threshold corresponding to the spectral channel; when the amplitude of the detection signal is less than or equal to the preset amplitude, detection continues until the single-frame detection window ends.

2. The multi-region multispectral detection method according to claim 1, characterized in that, The actual detection time is t1, the preset time is t0, the actual detection time t1 = t0 / p, and p ≥ 1.

3. The multi-region multispectral detection method according to claim 1, characterized in that, Different first thresholds are configured for different detection areas at different locations.

4. The multi-region multispectral detection method according to claim 1, characterized in that, Different first thresholds are configured for different spectral channels in different wavebands.

5. The multi-region multispectral detection method according to claim 1, characterized in that, The method for adjusting the actual detection time includes: pre-detecting the light intensity passing through the spectral channel, and determining the actual detection time based on the detected light intensity.

6. The multi-region multispectral detection method according to claim 1, characterized in that, Also includes: The induced charges generated by spectral channels of the same wavelength band in different detection areas that are all less than the second threshold are collected into one of the spectral channels and detected by the one spectral channel.

7. A multi-zone multispectral detection device, characterized in that, include: Several detection areas are provided, each with several spectral channels of different wavelengths, and the duration of a single-frame detection window for each spectral channel is a preset duration. A detection control module, connected to the plurality of detection areas, is used to adjust the actual detection duration within a single-frame detection window of a spectral channel based on the intensity of light detected by the spectral channel. This includes: when the intensity of light detected by the spectral channel is greater than a first threshold, the actual detection duration is less than a preset duration; when the intensity of light detected by the spectral channel is less than or equal to the first threshold, the actual detection duration is equal to the preset duration. The method for adjusting the actual detection duration includes: detecting the detection signal output by the spectral channel; stopping detection when the amplitude of the detection signal increases to a preset amplitude; the preset amplitude corresponds to the first threshold of the spectral channel; and continuing detection when the amplitude of the detection signal is less than or equal to the preset amplitude, until the single-frame detection window ends.

8. A multi-zone multispectral detection device, characterized in that, include: Several detection areas are provided, each with several spectral channels of different wavelengths, and the duration of a single-frame detection window for each spectral channel is a preset duration. Memory, used to store computer programs; A processor, connected to the plurality of detection areas and the memory, wherein when the computer program is executed by the processor, it is capable of implementing the multi-area multispectral detection method as described in any one of claims 1 to 6.

9. An electronic device, characterized in that, It includes the multi-zone multispectral detection device as described in claim 7 or 8 above; or it can implement the multi-zone multispectral detection method as described in any one of claims 1 to 6.

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