Continuous terahertz imaging image screening method and system

Abstract

The invention relates to the technical field of terahertz, and discloses a continuous terahertz imaging image screening method and system. According to the method, multiple pieces of image data obtained by the terahertz imaging equipment are screened, images with low clearness and integrity are eliminated, the accuracy rate of the terahertz imaging equipment is obtained, a threshold value is set for the accuracy rate, the accuracy rate in actual use is compared with the accuracy rate threshold value, and if the accuracy rate is smaller than the accuracy rate threshold value, the terahertz imaging equipment is started. If the accuracy rate is larger than or equal to an accuracy rate threshold value, the accuracy rate of the terahertz imaging equipment is higher than the standard, and the equipment can be normally used at the same time, if the accuracy rate of the terahertz imaging equipment is larger than or equal to the accuracy rate threshold value, the accuracy rate of the terahertz imaging equipment is higher than the standard.

Description

Technical Field

[0001] The present invention relates to the technical field of terahertz, and specifically to a method and system for screening continuous terahertz imaging images. Background Art

[0002] The frequency range of terahertz waves is between 0.1 THz and 10 THz. Since terahertz waves are located between millimeter waves and infrared waves, they have many unique physical properties. Therefore, they can be applied in material detection, medical imaging, security inspection, etc.

[0003] Image data of body tissues can be obtained through a terahertz imaging device. According to the image data, the condition of the body tissues can be judged. For example, for a wound tissue, in the central area of the wound, due to inflammation and suppuration, pus will be generated. Water has a high absorption degree and a low reflection degree for terahertz waves. Therefore, it appears as a darker area on the image, while normal skin tissue will appear as a brighter area due to its high reflectivity. In this way, the healing degree of the wound tissue can be judged. However, the imaging accuracy rate of the terahertz imaging device is easily affected by factors such as operation and environment. Therefore, for the images presented by the terahertz imaging device, certain screening is required to remove unclear and blurred images before the image data can be used to accurately judge the situation. Summary of the Invention

[0004] Aiming at the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a method and system for screening continuous terahertz imaging images, so as to be able to accurately judge using the images presented by the terahertz imaging device.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A method for screening continuous terahertz imaging images, including the following steps: First, under experimental conditions, a terahertz imaging device emits terahertz waves to irradiate body tissues, and the reflected signals are processed to obtain image data. Repeat this process multiple times to obtain multiple image data, and save all the image data as a subsequent reference basis; Second, set an image clarity and integrity threshold, record the clarity and integrity of each image in all the image data, select the images whose image clarity and integrity are greater than or equal to the image clarity and integrity threshold, record the quantity, and compare the recorded quantity with the total number of all images to obtain the ideal accuracy rate of the terahertz imaging device under experimental conditions; Third, set an accuracy rate threshold according to the ideal accuracy rate of the terahertz imaging device under experimental conditions. When actually using the terahertz imaging device to image body tissues, use the above method to regularly obtain the accuracy rate of the terahertz imaging device, and compare the accuracy rate with the accuracy rate threshold. If the accuracy rate is greater than or equal to the accuracy rate threshold, it means that the terahertz imaging device is working properly. If the accuracy rate is less than the accuracy rate threshold, it means that the imaging quality of the terahertz imaging device has decreased, and the terahertz imaging device needs to be repaired.

[0006] In some embodiments, a second threshold is preset, which is greater than the accuracy threshold and does not exceed the accuracy threshold plus 1%. When the accuracy of the terahertz imaging device is greater than or equal to the accuracy threshold, the accuracy of the terahertz imaging device is compared with the second threshold, and different responses are obtained according to the comparison results.

[0007] In some embodiments, if the accuracy of the terahertz imaging device is greater than the second threshold, it indicates that the accuracy of the terahertz imaging device is far from dropping to the accuracy threshold. In this case, a regular detection strategy for the accuracy of the terahertz imaging device is executed. If the accuracy of the terahertz imaging device is less than or equal to the second threshold, it indicates that the accuracy of the terahertz imaging device is close to dropping to the accuracy threshold. In this case, the regular detection strategy for the terahertz imaging device is changed.

[0008] In some embodiments, the changing method is to evenly divide the area between the second threshold and the accuracy threshold into several equal parts to form multiple regions. Among these regions, the part above the largest region is to perform regular inspections, and starting from the largest region, the inspection period is shortened in equal proportion until the smallest region.

[0009] In some embodiments, when the accuracy of the terahertz imaging device is less than the accuracy threshold, a third threshold is preset, which is less than the accuracy threshold and not lower than the accuracy threshold minus 1%. The accuracy of the terahertz imaging device is compared with the third threshold, and different responses are obtained according to the comparison results.

[0010] In some embodiments, if the accuracy of the terahertz imaging device is greater than or equal to the third threshold, it indicates that the degree to which the accuracy of the terahertz imaging device is lower than the accuracy threshold is low. In this case, measures are taken to temporarily improve the accuracy to ensure the ongoing work task, and maintenance is carried out after the work task is completed. If the accuracy of the terahertz imaging device is less than the third threshold, it indicates that the degree to which the accuracy of the terahertz imaging device is lower than the accuracy threshold is high. In this case, the terahertz imaging device is overhauled.

[0011] In some embodiments, when temporarily taking measures to improve the accuracy of the terahertz imaging device, first try to adjust the device parameters and optimize the imaging settings. After adjusting the device parameters and optimizing the imaging settings, the accuracy of the terahertz imaging device is obtained again, and responses are made according to the results obtained again.

[0012] In some embodiments, if the accuracy obtained again is greater than or equal to the accuracy threshold, it indicates that this temporary improvement measure is effective and continues to be used temporarily. If the accuracy obtained again is less than the accuracy threshold, it indicates that this temporary improvement measure is ineffective, and the temporary improvement measure is replaced with temporarily increasing the power of the terahertz wave source.

[0013] The present invention further provides the following technical solutions:

[0014] The present invention further provides a screening system for continuous terahertz imaging images, which includes: an acquisition module that emits terahertz waves through a terahertz imaging device to irradiate body tissues, and a receiver that receives the reflected signals and processes them to obtain image data. This process is repeated multiple times to obtain multiple image data; a screening module in which, first, a threshold for image clarity and integrity is set, and second, the clarity and integrity of each image among all the image data are recorded. Images with a clarity and integrity greater than or equal to the threshold for image clarity and integrity are selected and the quantity is recorded, while images with a clarity and integrity lower than the threshold for image clarity and integrity are screened out. Subsequently, the recorded quantity is compared with the total number of all images to obtain the accuracy rate of the terahertz imaging device under experimental conditions; a comparison module that sets an accuracy rate threshold based on the accuracy rate of the terahertz imaging device under experimental conditions. When actually using the terahertz imaging device for body tissue imaging, the accuracy rate of the terahertz imaging device is regularly obtained using the above method and compared with the accuracy rate threshold. If the accuracy rate is greater than or equal to the accuracy rate threshold, it indicates that the terahertz imaging device is working properly. If the accuracy rate is less than the accuracy rate threshold, it indicates that the imaging quality of the terahertz imaging device has significantly decreased. In this case, the terahertz imaging device needs to be repaired.

[0015] The present invention further provides a computer-readable storage medium storing a computer program, which when executed by a processor implements the above-mentioned screening method for continuous terahertz imaging images.

[0016] The technical solutions provided by the present invention have the following beneficial effects compared with the prior art:

[0017] First, in the present invention, multiple image data obtained by a terahertz imaging device are screened to exclude images with low clarity and integrity, thereby obtaining the accuracy rate of this terahertz imaging device. A threshold is set for the accuracy rate, and the accuracy rate during actual use is compared with the accuracy rate threshold. If the accuracy rate is less than the accuracy rate threshold, it indicates that the accuracy rate of the terahertz imaging device has significantly decreased and the imaging quality cannot be used as a basis for judging the condition of body tissues. At this time, repair is required. If the accuracy rate is greater than or equal to the accuracy rate threshold, it indicates that the accuracy rate of the terahertz imaging device is above the standard, and at this time, it indicates that the device can be used normally.

[0018] Second, in the present invention, when the accuracy rate is lower than the accuracy rate threshold, the degree of being lower than the accuracy rate threshold is judged. If the degree of being lower than the accuracy rate threshold is not high, in order to avoid affecting the ongoing work, measures can be taken to temporarily increase the accuracy rate, and repair can be carried out after the work is completed. If the degree of being lower than the accuracy rate threshold is high, it indicates that it is difficult to take measures to use it again. At this time, the machine is immediately shut down for repair. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the module structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the logical structure of the present invention. Detailed Embodiment

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0022] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one element can be one, while in other embodiments, the number of this element can be multiple. The term "one" cannot be understood as a limitation on the number.

[0023] The method for screening continuous terahertz imaging images provided by the present invention, as Figure 1 and Figure 2 shown, includes the following steps:

[0024] Step 1, under experimental conditions, use a terahertz imaging device to emit terahertz waves to irradiate body tissues. The terahertz waves reflected back by the body tissues are received by a receiver and then processed and displayed as image data. After continuously emitting multiple times, multiple image data are obtained, which are recorded as total image data. These image data reflect the situation of the same body tissue. The reason for needing multiple image data is that single image data may have errors due to reasons such as operation and environment. Therefore, it is not accurate to judge the situation of body tissues through the imaging of single image data. By analyzing the clarity and integrity of multiple images, the errors that may be caused by factors such as operation and environment in single imaging can be effectively reduced, the reliability of image screening can be improved, and the influence of accidental errors that may occur in a single image on the judgment result can be avoided.

[0025] Step 2: Set the threshold for the clarity and integrity of the image that can be used to judge the condition of body tissues by images. Record the clarity and integrity of each image in the total image data, select the images with the clarity and integrity of the image greater than or equal to the threshold of the clarity and integrity of the image, and record their quantity. The images with the clarity and integrity of the image less than the threshold of the clarity and integrity of the image are screened out. Then, compare the recorded quantity with the total number of images to obtain the accuracy rate of the terahertz imaging device under the experimental conditions. The clarity and integrity of the image here actually reflects whether the content presented in the image can be clearly seen. For example, when the clarity and integrity of the image is 100%, the body tissues presented in the image can be clearly seen in terms of size, shape, texture, etc. When the clarity and integrity of the image is 90%, the body tissues presented in the image can be basically clearly seen, and some minor image defects do not affect the judgment of the condition of body tissues. Take 90% as the accuracy rate threshold. When it is lower than 90%, the situation presented in the image has obvious defects and affects the judgment. In this case, this image data cannot be used.

[0026] Step 3: Set the accuracy rate threshold according to the ideal accuracy rate of the terahertz imaging device under the experimental conditions. When actually using the terahertz imager for body tissue imaging, regularly obtain the accuracy rate of the terahertz imaging device by using the above method, compare the accuracy rate with the accuracy rate threshold, and obtain different responses according to the comparison results. If the accuracy rate is greater than or equal to the accuracy rate threshold, it means that the terahertz imaging device can work normally, and the image data obtained by its imaging can be used as the basis for judging the condition of body tissues. If the accuracy rate is less than the accuracy rate threshold, it means that the imaging quality of the terahertz imaging device has significantly declined. At this time, the terahertz imaging device needs to be repaired. It is worth mentioning that there are many methods to set the accuracy rate threshold according to the accuracy rate of the terahertz imaging device under the experimental conditions. For example, calculate the accuracy rate of the terahertz imaging device under different environmental conditions, and set the accuracy rate threshold slightly lower than or equal to this value according to the average accuracy rate of the device. For example, if the average accuracy rate under the experimental conditions is 90%, the accuracy rate threshold can be set to 90% or slightly lower than 90%. Or, set a reasonable accuracy rate range according to the size of the standard deviation. For example, if the standard deviation is small, the performance of the terahertz imaging device is relatively stable, and a higher accuracy rate threshold can be set. If the standard deviation is large, a wider range can be set to adapt to possible fluctuations. The accuracy rate threshold is equal to the average accuracy rate minus the standard deviation. For example, if the average accuracy rate of the terahertz imaging device is 90% and the standard deviation is 5%, the accuracy rate threshold can be set to 90% - 5% = 85%.

[0027] Generally speaking, the screening method for terahertz imaging images includes three main steps. First, a terahertz imaging device is used to continuously emit terahertz waves and perform multiple imaging on the same body tissue, so as to obtain multiple image data to reduce errors caused by factors such as operation and environment. Second, an image clarity and integrity threshold is set, the clarity and integrity of all images are evaluated, and images with a clarity greater than or equal to the clarity and integrity threshold are selected to calculate the accuracy rate of the terahertz imaging device. For example, when the image clarity is 90%, the body tissue in the image is roughly clear, and images below this standard are excluded. Finally, according to the accuracy rate data under experimental conditions, an accuracy rate threshold is set. In practical applications, the accuracy rate threshold can be set according to the average accuracy rate or standard deviation of the device. If the accuracy rate is greater than or equal to the accuracy rate threshold, it indicates that the device is working normally; if it is lower than the accuracy rate threshold, it indicates that the imaging quality has declined and maintenance is required. Through this method, the stability of the terahertz imaging device in different environments can be ensured, and the reliability of the imaging data can be guaranteed.

[0028] Based on the above, when the accuracy rate of the terahertz imaging device is greater than or equal to the accuracy rate threshold, the image presented by the terahertz imaging device can be used as a basis for accurate judgment. However, if the accuracy rate of the terahertz imaging device is already close to the accuracy rate threshold, at this time, one has to worry about whether the accuracy rate of the terahertz imaging device will suddenly drop below the accuracy rate threshold, because the accuracy rate threshold is equivalent to a limit, which is the lowest standard for the image presented by the terahertz imaging device to be used as a basis for accurate judgment. The closer it is to this lowest standard, the more worried one will be about whether it will drop below the lowest standard. Therefore, a second threshold greater than and close to the accuracy rate threshold is set. The second threshold is at most no more than the accuracy rate threshold plus 1%, making the second threshold close to the accuracy rate threshold. Compare the accuracy rate of the terahertz imaging device with the second threshold and obtain different responses according to the comparison results. If the accuracy rate of the terahertz imaging device is greater than the second threshold, it indicates that the accuracy rate of the terahertz imaging device at this time is still far from the accuracy rate threshold. That is to say, the accuracy rate of the terahertz imaging device is still far from the lowest standard. In this case, implementing the regular detection strategy for the accuracy rate of the terahertz imaging device is sufficient. If the accuracy rate of the terahertz imaging device is less than or equal to the second threshold, it indicates that the accuracy rate of the terahertz imaging device at this time has already approached the accuracy rate threshold. That is to say, the accuracy rate of the terahertz imaging device has already approached the lowest standard. In this case, in order to ensure that it can be detected in time when the accuracy rate of the terahertz imaging device drops to the lowest standard, the regular detection strategy for the terahertz imaging device is changed. Generally speaking, when the accuracy rate of the terahertz imaging device is close to the accuracy rate threshold, although it can still be used as a basis for judgment, there is also a worry that the accuracy rate may suddenly drop below the accuracy rate threshold. Therefore, a second threshold greater than and close to the accuracy rate threshold can be set to further detect the state of the device (for example, the accuracy rate threshold is 90% and the second threshold is 91%). If the accuracy rate of the terahertz imaging device is greater than the second threshold, it means that the performance of the device is still stable and there is a certain margin from the lowest standard. At this time, the device can continue to be monitored according to the regular regular detection strategy. However, if the accuracy rate of the device is less than or equal to the second threshold, it indicates that the accuracy rate has approached the lowest standard. In order to detect in time when the accuracy rate drops below the accuracy rate threshold, the regular detection strategy needs to be adjusted to strengthen the monitoring frequency and sensitivity of the device to ensure that the imaging quality of the device can be detected and maintained in time before it deteriorates. This can effectively avoid the distortion of imaging data caused by a sudden drop in device performance.

[0029] The change method is as follows: The area between the second threshold Y2 and the accuracy threshold Y1 is evenly divided into n equal parts, and the equal part of each area is (Y2 - Y1) / n. All areas are arranged in ascending order, which are the first area n1 (including the accuracy threshold Y1), the second area n2,..., the nth area nn (including the second threshold Y2). The inspection strategy above the nth area nn is regular inspection. Assuming the regular inspection period is M, starting from the nth area nn to the first area n1, the inspection period M is shortened in equal proportion. For example, assuming the accuracy threshold Y1 is 90% and the second threshold Y2 is 91%, the area between 90% and 91% is evenly divided into 10 equal parts, and the equal part of each area is (91% - 90%)÷10 = 0.1%. Therefore, the first area n1 is 90% (including) - 90.1%, the second area n2 is 90.1% (including) - 90.2%, the third area n3 is 90.2% (including) - 90.3%, the fourth area n4 is 90.3% (including) - 90.4%, the fifth area n5 is 90.4% (including) - 90.5%, the sixth area n6 is 90.5% (including) - 90.6%, the seventh area n7 is 90.6% (including) - 90.7%, the eighth area n8 is 90.7% (including) - 90.8%, the ninth area n9 is 90.8% (including) - 90.9%, and the tenth area n10 is 90.9% (including) - 91% (including). The regular inspection period above the tenth area n10 is once every 40 hours. Then, the inspection period of the tenth area n10, 90.9% (including) - 91% (including) is once every 38 hours, the inspection period of the ninth area n9, 90.8% (including) - 90.9% is once every 36 hours, the inspection period of the eighth area n8, 90.7% (including) - 90.8% is once every 34 hours, the inspection period of the seventh area n7, 90.6% (including) - 90.7% is once every 32 hours, the inspection period of the sixth area n6, 90.5% (including) - 90.6% is once every 30 hours, the inspection period of the fifth area n5, 90.4% (including) - 90.5% is once every 28 hours, the inspection period of the fourth area n4, 90.3% (including) - 90.4% is once every 26 hours, the inspection period of the third area n3, 90.2% (including) - 90.3% is once every 24 hours, the inspection period of the second area n2, 90.1% (including) - 90.2% is once every 22 hours, and the inspection period of the first area n1, 90% (including) - 90.1% is once every 20 hours.

[0030] In addition, when the accuracy rate of the terahertz imaging device drops below the accuracy rate threshold, if it has just dropped below the accuracy rate threshold, that is, it is less than the accuracy rate threshold but close to the accuracy rate threshold, in order to ensure normal operation, some temporary measures can be adopted to increase the accuracy rate of the terahertz imaging device to the accuracy rate threshold or above. Because if the device is directly shut down for maintenance, it may affect the ongoing work. In many cases, the terahertz imaging device may be conducting crucial experiments or work tasks. If it is immediately shut down for maintenance at this time, it may cause interruptions or delays in the experiments, work tasks, etc. Especially in some real-time or time-sensitive work, shutting down the device may affect the entire work process and project progress. To avoid this situation, measures to temporarily increase the accuracy rate should be taken to ensure that the device can continue to operate until the work task is completed, and then the device can be shut down for maintenance. In addition, when the accuracy rate of the terahertz imaging device is only slightly lower than the accuracy rate threshold, it indicates that the performance degradation of the terahertz imaging device is not significant and it can still meet certain work requirements. The terahertz imaging device may only have minor performance fluctuations and will not cause serious distortion or failures. In this case, a complete shutdown for maintenance is not necessary because the work may still be able to continue. Only temporary countermeasures, such as adjusting device parameters and optimizing imaging settings, are needed to restore the normal accuracy rate in the short term. To achieve the above goals, a third threshold that is less than the accuracy rate threshold but close to it is set. The third threshold is at least not lower than the accuracy rate threshold minus 1%, making the third threshold close to the accuracy rate threshold. When the accuracy rate of the terahertz imaging device is less than the accuracy rate threshold, the accuracy rate of the terahertz imaging device is compared with the third threshold, and different responses are obtained based on the comparison results. If the accuracy rate of the terahertz imaging device is greater than or equal to the third threshold, it indicates that the degree to which the accuracy rate of the terahertz imaging device is lower than the accuracy rate threshold is relatively low. In this case, some temporary measures can be adopted to increase the accuracy rate of the terahertz imaging device to the accuracy rate threshold or above to complete the current work, and then the terahertz imaging device can be shut down for maintenance when there is free time. If the accuracy rate of the terahertz imaging device is less than the third threshold, it indicates that the degree to which the accuracy rate of the terahertz imaging device is lower than the accuracy rate threshold is relatively high, and the accuracy rate has dropped significantly below the threshold. In this case, immediate preparations for the maintenance of the terahertz imaging device are required to prevent the imaging quality from further deteriorating and affecting the work progress. In this way, the problems of device maintenance and accuracy rate recovery can be flexibly handled without affecting the work.

[0031] Regarding how to temporarily improve the accuracy rate of terahertz imaging equipment, in addition to the above-mentioned attempts to adjust equipment parameters and optimize imaging settings, etc., which can be carried out when slightly below the accuracy rate threshold. If the measures of adjusting equipment parameters and optimizing imaging settings are effective, then follow such measures. If the measures of adjusting equipment parameters and optimizing imaging settings are ineffective, the signal quality can also be improved by temporarily increasing the power of the terahertz wave source, thereby temporarily enhancing the imaging quality. Because increasing the power of the terahertz wave source will directly increase the intensity of the imaging signal, thus enhancing the signal-to-noise ratio in a short time, making the image clearer, and improving the signal penetration ability, which is more effective for imaging thick tissues or highly absorptive regions. At the same time, it reduces the influence of signal attenuation caused by environmental noise. However, the terahertz wave source operating at high power will generate more heat, and long-term operation may lead to accelerated component wear and shorten the equipment life. Therefore, increasing the power of the terahertz wave source is only suitable for short-term temporary improvement when there are unfinished work tasks. After the work task is completed, maintenance still needs to be carried out.

[0032] Generally speaking, when the accuracy rate of the terahertz imaging equipment drops below the accuracy rate threshold but is still close to it, in order to avoid the impact of shutdown maintenance on the ongoing key work, temporary measures can be taken to restore the equipment accuracy rate. At this time, the decline in equipment performance is relatively small, and there may only be slight fluctuations. The normal accuracy rate can still be restored in the short term by means such as adjusting equipment parameters and optimizing imaging settings to continue to complete the work task. To achieve this goal, a third threshold close to the accuracy rate threshold can be set. When the equipment accuracy rate is higher than this third threshold, it indicates that the decline in equipment performance is not serious, and temporary measures can be taken to maintain operation, and a comprehensive maintenance can be carried out after there is free time; if it is lower than this third threshold, immediate shutdown maintenance needs to be prepared to avoid further affecting the imaging quality. In addition, increasing the power of the terahertz wave source is an effective short-term means to improve the accuracy rate, which can enhance the signal intensity and improve the imaging quality. However, long-term high-power operation will accelerate component wear and affect the equipment life. Therefore, this measure is only applicable for short-term use when the task is not completed. In short, through these temporary measures, the normal operation of the equipment can be ensured without affecting the work process, and necessary maintenance can be carried out after the task is completed.

[0033] Embodiments disclosed in the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. Embodiments disclosed in the present invention include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program codes for executing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from a network through a communication part, and / or installed from a removable medium. When the computer program is executed by a central processing unit, the above functions defined in the methods of the present application are executed. It should be noted that the computer-readable medium described above in the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the two. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of a computer-readable storage medium can include, but are not limited to: an electrical connection with one or more wire segments, a portable computer disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical fiber, a portable compact disk read-only memory, an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium can be any tangible medium that contains or stores a program, and the program can be used by or combined with an instruction execution system, apparatus, or device. In the present application, a computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, in which computer-readable program codes are carried. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, and the computer-readable medium can send, propagate, or transmit a program for use by or combined with an instruction execution system, apparatus, or device. The program codes contained on the computer-readable medium can be transmitted by any appropriate medium, including but not limited to: wireless segments, wire segments, optical cables, RF, etc., or any suitable combination of the above.

[0034] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagram may represent a module, a segment of a program, or a part of code that contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions denoted in the blocks may occur in a different order than that denoted in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0035] Those skilled in the art should understand that the above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A screening method for continuous terahertz imaging images, characterized in that, It includes the following steps: First, under experimental conditions, a terahertz imaging device emits terahertz waves to irradiate body tissues. The reflected signals are processed to obtain image data. This is repeated multiple times to obtain multiple sets of image data, and all the image data is saved as a reference for subsequent use; Second, set a threshold for image clarity and integrity. Record the clarity and integrity of each image among all the image data. Select the images with clarity and integrity greater than or equal to the threshold for image clarity and integrity, record the quantity, and compare the recorded quantity with the total number of all images to obtain the ideal accuracy rate of the terahertz imaging device under experimental conditions; Third, set an accuracy threshold based on the ideal accuracy rate of the terahertz imaging device under experimental conditions. When actually using the terahertz imaging device for body tissue imaging, use the above method to regularly obtain the accuracy rate of the terahertz imaging device, and compare the accuracy rate with the accuracy threshold. If the accuracy rate is greater than or equal to the accuracy threshold, it means the terahertz imaging device is working properly. If the accuracy rate is less than the accuracy threshold, it means the imaging quality of the terahertz imaging device has deteriorated, and the terahertz imaging device needs to be repaired and maintained.

2. The screening method for continuous terahertz imaging images according to claim 1, characterized in that Preset a second threshold, which is greater than the accuracy threshold and does not exceed the accuracy threshold plus 1%. When the accuracy rate of the terahertz imaging device is greater than or equal to the accuracy threshold, compare the accuracy rate of the terahertz imaging device with the second threshold, and different responses are obtained according to the comparison results.

3. The screening method for continuous terahertz imaging images according to claim 2, wherein, If the accuracy rate of the terahertz imaging device is greater than the second threshold, it indicates that the accuracy rate of the terahertz imaging device is far from dropping to the accuracy threshold. In this case, implement a regular detection strategy for the accuracy rate of the terahertz imaging device. If the accuracy rate of the terahertz imaging device is less than or equal to the second threshold, it indicates that the accuracy rate of the terahertz imaging device is close to dropping to the accuracy threshold. In this case, change the regular detection strategy for the terahertz imaging device.

4. The screening method for continuous terahertz imaging images according to claim 3, characterized in that The way of change is to divide the area between the second threshold and the accuracy threshold into several equal parts to form multiple regions. Among these regions, the part above the largest region is to perform regular inspections, and starting from the largest region, the inspection period for the regular inspections until the smallest region is shortened in equal proportion.

5. The screening method of the continuous terahertz imaging image according to claim 1, characterized in that, When the accuracy rate of the terahertz imaging device is less than the accuracy threshold, preset a third threshold, which is less than the accuracy threshold and not lower than the accuracy threshold minus 1%. Compare the accuracy rate of the terahertz imaging device with the third threshold, and different responses are obtained according to the comparison results.

6. The screening method for continuous terahertz imaging images according to claim 5, characterized in that, If the accuracy rate of the terahertz imaging device is greater than or equal to the third threshold, it indicates that the degree to which the accuracy rate of the terahertz imaging device is lower than the accuracy threshold is low. In this case, adopt measures to temporarily improve the accuracy rate to ensure the ongoing work tasks, and then perform repairs and maintenance after the work tasks are completed. If the accuracy rate of the terahertz imaging device is less than the third threshold, it indicates that the degree to which the accuracy rate of the terahertz imaging device is lower than the accuracy threshold is high. In this case, repair and maintain the terahertz imaging device.

7. The screening method for continuous terahertz imaging images according to claim 6, characterized in that When temporarily taking measures to improve the accuracy rate of the terahertz imaging device, first try to adjust the device parameters and optimize the imaging settings. After adjusting the device parameters and optimizing the imaging settings, obtain the accuracy rate of the terahertz imaging device again and make corresponding responses according to the results obtained again.

8. The screening method for continuous terahertz imaging images according to claim 7, characterized in that, If the accuracy rate obtained again is greater than or equal to the accuracy rate threshold, it indicates that this temporary improvement measure is effective and continue to use it temporarily. If the accuracy rate obtained again is less than the accuracy rate threshold, it indicates that this temporary improvement measure is ineffective, and change the temporary improvement measure to temporarily increase the power of the terahertz wave source.

9. A screening system for continuous terahertz imaging images, characterized in that, The screening system is used to execute the screening method described in any one of claims 1-8 above, and it includes: An acquisition module, which emits terahertz waves through the terahertz imaging device to irradiate the body tissue, and the receiver receives the reflected signal and obtains image data after processing. Repeat this process multiple times to obtain multiple image data; A screening module, in this module, first set the threshold of image clarity and integrity, secondly record the clarity and integrity of each image in all the image data, select the images with the clarity and integrity greater than or equal to the threshold of image clarity and integrity, record the quantity, and the images with the clarity and integrity lower than the threshold of image clarity and integrity are screened out. Then compare the recorded quantity with the total quantity of all images to obtain the accuracy rate of the terahertz imaging device under the experimental conditions; A comparison module, which sets the accuracy rate threshold according to the accuracy rate of the terahertz imaging device under the experimental conditions. When actually using the terahertz imaging device to image the body tissue, regularly obtain the accuracy rate of the terahertz imaging device by using the above method, and compare the accuracy rate with the accuracy rate threshold. If the accuracy rate is greater than or equal to the accuracy rate threshold, it means that the terahertz imaging device is working normally. If the accuracy rate is less than the accuracy rate threshold, it means that the imaging quality of the terahertz imaging device has significantly declined. In this case, repair the terahertz imaging device.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement a screening method for a continuous terahertz imaging image described in any one of claims 1-8 above.

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