Portable pupil observation and measurement device based on image processing

Abstract

The invention relates to the technical field of pupil observation and measurement, in particular to a portable pupil observation and measurement device based on image processing, which comprises a measurement instrument main body, a data display for watching data information in real time is arranged on the measurement instrument main body, and an imaging mechanism is mounted at one end of the measurement instrument main body. The imaging mechanism comprises a CCD camera used for scanning pupils and imaging, an infrared illumination source used for providing a cross light source and a laser emission lamp used for preliminarily positioning the pupils, the skin around the eyes is expanded outwards through a plurality of tension plates before the pupils are scanned, when the skin around the eyes presents certain tension outwards, the roots of the eyelashes are turned outwards together with the eyelashes, and the eyelashes are turned outwards. The eyeball can be completely exposed, and then the pupil is scanned, recognized and measured through the imaging mechanism, so that the pupil measurement precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pupil observation and measurement, and in particular to a portable pupil observation and measurement device based on image processing. Background Art

[0002] Observing pupil changes is helpful for clinical diagnosis of patients with coma, convulsion, shock, poisoning, respiratory failure and circulatory failure. It is an important procedure for preoperative examination of patients. At present, some medical staff in clinical medicine still use small flashlights to illuminate the patient's pupils and judge the condition based on rich clinical experience and subjective judgment. For young medical staff who lack clinical work experience, subjective judgment cannot be mastered in a short time, so it will cause large errors in pupil judgment. Another part of medical staff uses a pupillometer to complete this step. In order to facilitate the use of medical staff, the pupillometer is generally a small integrated handheld instrument, which is mainly composed of a bracket body, an imaging mechanism and an auxiliary mechanism placed around the eye. However, even this portable handheld pupillometer has some problems when used. For example, the auxiliary mechanism placed around the eye completely wraps the eye area, including the patient's eyelids and eyelashes. For some patients with loose eye skin that partially covers the eyeball and long eyelashes, there will be certain occlusion shadows when the pupil is collected, which directly affects the measurement accuracy of the pupil. Summary of the invention

[0003] Technical Solution To achieve the above-mentioned object, the present invention provides the following technical solutions: a portable pupil observation and measurement device based on image processing, comprising a measuring instrument body, a data display for viewing data information in real time is provided on the measuring instrument body, an imaging mechanism is installed at one end of the measuring instrument body, and the imaging mechanism comprises a CCD camera for scanning the pupil and imaging, an infrared illumination source providing a cross light source, and a laser emitting lamp for preliminarily locating the pupil; The other end of the imaging mechanism is threadedly mounted with an auxiliary component, and the inner wall of the auxiliary component is circumferentially provided with a plurality of slide grooves 1, and the bottom end of each slide groove 1 is movably connected to a tension plate for stretching the skin around the eye outward; The inner wall of each of the slide grooves 1 is also provided with a slide groove 2, and a slider is slidably connected inside each of the slide grooves 2. A pull rod is movably connected between the slider and the tension plate through a hinge seat, and the inclination degree of the tension plate can be changed when the slider moves; A pair of ear plates are fixedly connected at symmetrical positions on both sides of the outer surface of the auxiliary component, and a cylinder is installed on each ear plate. One end of the output shaft of the cylinder is fixedly connected to a moving ring that is movably sleeved on the imaging mechanism, and a plurality of push rods are fixedly connected to one end surface of the moving ring. The other end of the push rod movably penetrates into the second slide groove and is fixedly connected to the slider. When the push rod moves, it can drive the slider to move synchronously.

[0004] Preferably, there is one infrared illumination source, and the infrared illumination source is located between the CCD camera and the laser emitting lamp. There are several laser emitting lamps, and the several laser emitting lamps are distributed in an equidistant array outside the CCD camera. When the several laser emitting lamps are irradiated at the same time, an aperture surrounding the pupil is formed, which is convenient for preliminary positioning of the pupil.

[0005] Preferably, the auxiliary component is a circular ring structure, and the diameter of the circle surrounded by the plurality of tension plates is greater than the diameter of the circle surrounded by the plurality of laser emitting lamps.

[0006] Preferably, the number of the sliders is the same as that of the push rods, and the tension plate is a combined structure of a plastic plate and a rubber head. The plastic plate has a certain hardness and is mainly used to stretch the skin around the eyes, and the rubber head has a certain flexibility to avoid damaging the skin around the eyes.

[0007] Preferably, the imaging mechanism further comprises an ultrasonic transmitting and receiving module, which is mainly an ultrasonic sensor for obtaining the distance between the pupil and the CCD camera; A driving module, which is mainly a driver for driving the CCD camera to scan and collect pupil information; The signal processing module is mainly a filter used to perform noise reduction and other optimization processing on the signal scanned and collected by the CCD camera; The microprocessor module is mainly a microprocessor used to control the CCD camera and the driver, calculate the scanned pupil information and send it to the data display.

[0008] Preferably, the imaging mechanism is further provided with a lighting module, a power module and a wireless communication module, wherein the lighting module is mainly an LED lighting lamp used to provide light source for scanning by the CCD camera; The power module is used to provide electrical energy to all electrical components; The wireless communication module is at least one of Bluetooth and WiFi, and is used to connect the data display to the hospital's EMR system and HIS system; The CCD camera is mainly a linear array CCD camera, which uses its grating ruler to provide coordinates and has high accuracy.

[0009] A portable pupil observation and recognition method based on image processing comprises the following steps: S1, aligning the opening of the auxiliary component with the periorbital area and fitting it to the periorbital area, so that the plurality of tension plates are in contact with the periorbital skin, and adjusting the inclination of the plurality of tension plates so as to stretch the periorbital skin outward; S2, positioning the iris and pupil of the eyeball between the apertures formed by the illumination of several laser emitting lamps, and simultaneously illuminating any area of ​​the pupil with the cross light source of the infrared illumination source as a coordinate; S3, before the LED lighting is turned on, the CCD camera scans the pupil multiple times, the number of scans is not less than 30 times, and the data information is sent to the data display through the microprocessor; After the LED lighting is turned on, the CCD camera scans the pupil for multiple times, the number of scans is not less than 30 times, and the data information is sent to the data display through the microprocessor.

[0010] A portable pupil observation and measurement method based on image processing comprises the following steps: a. Before the LED lighting is turned on, the pupil is illuminated with a cross light source of an infrared lighting source, and the CCD camera is used to take multiple shots, with the frame rate set to at least 60 frames. The collected image is first grayscaled to increase the contrast, and the pupil grayscale is smaller than the iris grayscale. Then, the image is binarized to make the image black and white, and the pupil area is further separated; The pupil shape is approximately a circle. In the plane coordinate system after imaging, the coordinates of the four intersections of the pupil edge and the cross light source coordinate axis are: M(x1,0), N(x2,0), P(0,y1), Q(0,y2). The diameter is calculated based on the unique fitting circle, where R is the diameter of the circle and r is the radius of the circle: The formula is as follows: r= , R=2r; b. After multiple sets of diameter data are measured after multiple imaging, the change rate of the pupil during the irradiation process is calculated. The formula is as follows: S = (R1 - R2 ) / R1; Wherein, S is the change rate, R1 is the maximum value of the pupil diameter change, and R2 is the minimum value of the pupil diameter change. The patient's condition is determined by comparing the measured change rate and diameter value with the data in the hospital's EMR system and HIS system; c. After the LED lighting is turned on, repeat the above steps a and b, and calculate the time of the patient's pupil change. The formula is as follows: t0=t2-t1; Among them, t0 is the change time, t2 is the light exposure time, and t1 is the time when R is in the initial resting state. The patient's condition is judged by comparing the measured change time with the data in the hospital EMR system and HIS system.

[0011] Beneficial Effects Compared with the prior art, the present invention provides a portable pupil observation and measurement device based on image processing, which has the following beneficial effects: Before scanning the pupil, several tension plates are used to stretch the skin around the eye outward. When the skin around the eye is stretched outward to a certain tension, the roots of the eyelashes are turned outward together with the eyelashes, which can fully expose the eyeball, making it easier for the CCD camera to scan and image the pupil, thereby improving the accuracy of pupil measurement.

[0012] By setting up an imaging mechanism, the pupil is initially positioned by an aperture formed by several laser emitting lamps in sequence, a cross light source is provided by an infrared illumination source as a coordinate axis to lock the plane coordinates of the intersection with the pupil, a linear array CCD camera is used to scan and identify the pupil, the pupil diameter is calculated and measured from multiple coordinate values, and the multiple sets of diameter data are connected with the hospital's EMR system and HIS system for comparison, thereby completing automatic and accurate measurement of the pupil, facilitating medical staff to intuitively analyze the data obtained, reducing the error of manual observation, and being suitable for a wider range of medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 This is the overall appearance diagram of the measuring instrument of the present invention; Figure 2 This is a disassembled diagram of the imaging mechanism and auxiliary parts of the present invention; Figure 3 It is a front view of the auxiliary part of the measuring instrument of the present invention; Figure 4 It is an enlarged view of the auxiliary part structure of the present invention; Figure 5 A top view of the measuring instrument of the present invention; Figure 6 It is a plane coordinate diagram of the intersection of pupil edge and cross light source coordinates of the present invention; Figure 7 is a block diagram of modules included in the imaging mechanism of the present invention; Figure 8 This is a flowchart of the pupil observation and identification method of the present invention.

[0014] Description of reference numerals: 1. Measuring instrument body; 11. Data display; 2. Imaging mechanism; 21. CCD camera; 22. Infrared illumination source; 23. Laser emission lamp; 3. Auxiliary parts; 31. Slide 1; 311. Tension plate; 32. Slide 2; 321. Slider; 33. Pull rod; 34. Ear plate; 4. Cylinder; 41. Moving ring; 42. Push rod. DETAILED DESCRIPTION

[0015] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0016] like Figure 1-5 As shown, it is the first embodiment of the present invention. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable pupil observation and measurement device based on image processing, comprising a measuring instrument body 1, a data display 11 for real-time viewing of data information is provided on the measuring instrument body 1, an imaging mechanism 2 is installed at one end of the measuring instrument body 1, the imaging mechanism 2 comprises a CCD camera 21 for scanning the pupil and imaging, an infrared illumination source 22 providing a cross light source, and a laser emitting lamp 23 for preliminarily locating the pupil, the number of the infrared illumination source 22 is one, and the infrared illumination source 22 is located between the CCD camera 21 and the laser emitting lamp 23, the number of the laser emitting lamps 23 is several, and the several laser emitting lamps 23 are equidistantly arrayed outside the CCD camera 21, when the several laser emitting lamps 23 are irradiated at the same time, an aperture surrounding the pupil is formed, which is convenient for preliminarily locating the pupil, before scanning the pupil, the aperture formed by the simultaneous illumination of the several laser emitting lamps 23 is firstly corresponding to the outside of the pupil, the outermost range of the aperture does not exceed the edge range of the iris, and the irradiated picture is presented on the data display 11, which is convenient for real-time viewing.

[0017] Furthermore, an auxiliary part 3 is threadedly installed on the other end of the imaging mechanism 2, and the two are connected by threads to facilitate installation and disassembly. A plurality of slide grooves 31 are circumferentially opened on the inner wall of the auxiliary part 3, and a tension plate 31 is movably connected to the bottom end of each slide groove 31. The tension plate 311 and the slide groove 31 can be movably connected by a rotating shaft or a hinge to stretch the skin around the eye outward. The auxiliary part 3 is a circular ring structure, and the diameter of the circle surrounded by the plurality of tension plates 311 is larger than the diameter of the circle surrounded by the plurality of laser emitting lamps 23, so that the tension plate 311 will not block the laser emitting lamp 23 when irradiating the eyeball.

[0018] Among them, the inner wall of each slide groove 1 31 is also provided with a slide groove 2 32, and each slide groove 2 32 is slidably connected with a slider 321, and a pull rod 33 is movably connected between the slider 321 and the tension plate 311 through a hinge seat. When the slider 321 moves, the inclination of the tension plate 311 can be changed. The number of sliders 321 and the push rod 42 is the same. The tension plate 311 is a combined structure of a plastic plate and a rubber head. The plastic plate has a certain hardness and is mainly used to stretch the skin around the eyes. The rubber head has a certain flexibility to avoid damaging the skin around the eyes. Before the CCD camera 21 scans the pupil, a number of tension plates 311 are used to stretch the skin around the eyes outward. When the skin around the eyes is stretched outward to a certain tension, the roots of the eyelashes are turned outward together with the eyelashes, so that the eyeball can be completely exposed, which is convenient for the CCD camera 21 to scan and image the pupil, thereby improving the accuracy of pupil measurement.

[0019] Among them, a pair of ear plates 34 are fixedly connected at symmetrical positions on both sides of the outer surface of the auxiliary part 3, and a cylinder 4 is installed on each ear plate 34. One end of the output shaft of the cylinder 4 is fixedly connected to a moving ring 41 that is movably sleeved on the imaging mechanism 2. A plurality of push rods 42 are fixedly connected to one end surface of the moving ring 41. The other end of the push rod 42 is movably inserted into the second slide groove 32 and is fixedly connected to the slider 321. When the push rod 42 moves, it can drive the slider 321 to move synchronously. When in use, firstly, a plurality of tension plates 311 in a circular array are arranged. It is fitted around the eye, and then the cylinder 4 is started so that its output shaft drives the moving ring 41 to move. Since the moving ring 41 is fixedly connected to a plurality of push rods 42, the moving ring 41 drives each push rod 42 to move synchronously, and the other end of the push rod 42 pushes the slider 321. During the movement of the slider 321, the tension plate 311 is pulled by the pull rod 33, so that one end of the tension plate 311 fitted around the eye is deflected, thereby stretching the skin around the eye outward. The deflection angles of the plurality of tension plates 311 are consistent and controlled by the same driving source.

[0020] When the above embodiment is working, when observing and measuring the pupil, first, a plurality of circular tension plates 311 are attached to the periphery of the eye, and then the cylinder 4 is started so that its output shaft drives the moving ring 41 to move, and the moving ring 41 drives each push rod 42 to move synchronously, and the other end of the push rod 42 pushes the slider 321. During the movement of the slider 321, the tension plate 311 is pulled by the pull rod 33, so that one end of the tension plate 311 attached to the periphery of the eye is deflected, and then the skin around the eye is stretched outward. When the skin around the eye is outward to a certain tension, the roots of the eyelashes are turned outward together with the eyelashes, and the eyeball can be fully exposed. Then, the aperture formed by the simultaneous illumination of a plurality of laser emitting lamps 23 corresponds to the outside of the pupil, and the outermost range of the aperture does not exceed the edge range of the iris, so that the pupil is preliminarily positioned within the aperture, and the illuminated image is presented on the data display 11 for real-time viewing. Finally, the CCD camera 21 is used to scan and image the pupil, thereby improving the accuracy of pupil measurement.

[0021] Embodiment 2, as Figure 3 and Figure 7 As shown, a portable pupil observation and measurement device based on image processing, the imaging mechanism 2 also includes an ultrasonic transmitting and receiving module, which is mainly an ultrasonic sensor used to obtain the distance between the pupil and the CCD camera 21. When it is recognized that the distance between the CCD camera 21 and the pupil is the set distance, the obtained information can be transmitted to the starting module; The driving module is mainly a driver for driving the CCD camera 21 to scan and collect pupil information. After receiving the distance information, the driver starts the CCD camera 21 to shoot and image; The signal processing module is mainly a filter used to perform optimization processing such as noise removal on the signal scanned and collected by the CCD camera 21 to improve the clarity of pupil imaging; The microprocessor module is mainly a microprocessor used to control the CCD camera 21 and the driver, calculate the scanned pupil information and send it to the data display 11.

[0022] Furthermore, the imaging mechanism 2 is also provided with a lighting module, a power module and a wireless communication module. The lighting module is mainly an LED lighting lamp used to provide a light source for scanning of the CCD camera 21; The power module is used to provide power to all power-consuming components; The wireless communication module is at least one of Bluetooth and WiFi, which is used to connect the data display 11 to the hospital's EMR system and HIS system. The acquired data can be directly displayed on the data display 11 through the wireless connection, which is convenient for medical staff to directly compare and view. The EMR system refers to the hospital's electronic medical record system, which is an information system that records the entire process of patient diagnosis and treatment. It can realize digital storage, query and statistical analysis of medical record information. The HIS system refers to the core system of hospital management, which integrates medical information from various departments of the hospital, including patient information, medical order information, drug information, test information, etc., to provide comprehensive medical information support for medical staff.

[0023] The CCD camera 21 is mainly a linear array CCD camera. The linear array CCD camera uses its grating ruler to provide coordinates, and can directly and quickly measure the coordinate value of the intersection with high accuracy.

[0024] Embodiment three, as Figure 1-8 As shown, a portable pupil observation and recognition method based on image processing comprises the following steps: S1, align the opening of the auxiliary component 3 with the periorbital area so that the plurality of tension plates 311 are in contact with the periorbital skin, and at the same time, adjust the inclination of the plurality of tension plates 311 so as to stretch the periorbital skin outward; S2, positioning the iris and pupil of the eyeball between the apertures formed by the illumination of several laser emitting lamps 23, and simultaneously illuminating any area of ​​the pupil with the cross light source of the infrared illumination source 22 as a coordinate; S3, before the LED lighting is turned on, the CCD camera 21 scans the pupil multiple times, the number of scans is not less than 30 times, and the data information is sent to the data display 11 through the microprocessor; After the LED lighting is turned on, the CCD camera 21 scans the pupil for multiple times, the number of scans is not less than 30 times, and the data information is sent to the data display 11 through the microprocessor.

[0025] The pupil is observed and measured under lighting conditions and under normal conditions, and multiple sets of data are measured and compared with the patient's medical records to improve the accuracy of the patient's pupil observation.

[0026] Embodiment 4, as Figure 6 As shown, a portable pupil observation and measurement method based on image processing comprises the following steps: a. Before the LED lighting is turned on, the pupil is illuminated by the cross light source of the infrared lighting source 22, and the CCD camera 21 is used to take multiple shots and images, and the frame rate is set to at least 60 frames. The collected image is first grayed to increase the contrast. The graying of the image can also simplify the matrix and improve the operation speed. The pupil gray is smaller than the iris gray. Then the image is binarized to make the image black and white, and the pupil area is further separated, so that the intersection of the cross light source and the pupil edge position is more intuitive and clear; The pupil shape is approximately a circle. In the plane coordinate system after imaging, the coordinates of the four intersections of the pupil edge and the cross light source coordinate axis are: M(x1,0), N(x2,0), P(0,y1), Q(0,y2). The diameter is calculated based on the unique fitting circle, where R is the diameter of the circle and r is the radius of the circle: The formula is as follows: r= , R=2r; b. After multiple sets of diameter data are measured after multiple imaging, the change rate of the pupil during the irradiation process is calculated. The formula is as follows: S = (R1 - R2 ) / R1; Among them, S is the rate of change, R1 is the maximum value of pupil diameter change, and R2 is the minimum value of pupil diameter change. The patient's condition is judged by comparing the measured rate of change and diameter value with the data in the hospital's EMR system and HIS system; c. After the LED lighting is turned on, repeat the above steps a and b, and calculate the time of the patient's pupil change. The formula is as follows: t0=t2-t1; Among them, t0 is the change time, t2 is the light exposure time, and t1 is the time when R is in the initial resting state. The patient's condition is judged by comparing the measured change time with the data in the hospital EMR system and HIS system.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable pupil observation and measurement device based on image processing, comprising a measuring instrument body (1), the measuring instrument body (1) being provided with a data display (11) for viewing data information in real time, characterized in that: An imaging mechanism (2) is installed at one end of the measuring instrument body (1), and the imaging mechanism (2) includes a CCD camera (21) for scanning the pupil and forming an image, an infrared illumination source (22) for providing a cross light source, and a laser emitting lamp (23) for preliminarily locating the pupil; The other end of the imaging mechanism (2) is threadedly mounted with an auxiliary component (3), the inner wall of the auxiliary component (3) is circumferentially provided with a plurality of slide grooves (31), the bottom end of each slide groove (31) being movably connected to a tension plate (311) for stretching the skin around the eye outwards; The inner side wall of each of the first slide grooves (31) is also provided with a second slide groove (32), and each of the second slide grooves (32) is slidably connected to a slider (321), and a pull rod (33) is movably connected between the slider (321) and the tension plate (311) through a hinge seat, and the inclination degree of the tension plate (311) can be changed when the slider (321) moves; a pair of ear plates (34) are fixedly connected at symmetrical positions on both sides of the outer surface of the auxiliary component (3), and each ear plate (34) is installed with a cylinder (4), and one end of the output shaft of the cylinder (4) is fixedly connected to a moving ring (41) that is movably sleeved on the imaging mechanism (2), and a plurality of push rods (42) are fixedly connected to one end surface of the moving ring (41), and the other end of the push rod (42) is movably inserted into the second slide groove (32) and fixedly connected to the slider (321), and when the push rod (42) moves, it can drive the slider (321) to move synchronously.

2. The portable pupil observation and measurement device based on image processing according to claim 1, characterized in that: The number of the infrared illumination source (22) is one, and the infrared illumination source (22) is located between the CCD camera (21) and the laser emitting lamp (23). The number of the laser emitting lamps (23) is a plurality, and the plurality of laser emitting lamps (23) are distributed in an equidistant array outside the CCD camera (21). When the plurality of laser emitting lamps (23) irradiate simultaneously, an aperture surrounding the pupil is formed, thereby facilitating preliminary positioning of the pupil.

3. The portable pupil observation and measurement device based on image processing according to claim 1, characterized in that: The auxiliary component (3) is a circular ring structure, and the diameter of a circle surrounded by a plurality of tension plates (311) is greater than the diameter of a circle surrounded by a plurality of laser emission lamps (23).

4. The portable pupil observation and measurement device based on image processing according to claim 1, characterized in that: The number of the sliders (321) and the push rods (42) is the same, and the tension plate (311) is a combined structure of a plastic plate and a rubber head. The plastic plate has a certain hardness and is mainly used to stretch the skin around the eyes, and the rubber head has a certain flexibility to avoid damaging the skin around the eyes.

5. The portable pupil observation and measurement device based on image processing according to claim 1, characterized in that: The imaging mechanism (2) further comprises an ultrasonic transmitting and receiving module, which is mainly an ultrasonic sensor used to obtain the distance between the pupil and the CCD camera (21); A driving module, mainly a driver for driving the CCD camera (21) to scan and collect pupil information; The signal processing module is mainly a filter used to perform optimization processing such as noise removal on the signal scanned and collected by the CCD camera (21); The microprocessor module is mainly a microprocessor used to control the CCD camera (21) and the driver, calculate the scanned pupil information and send it to the data display (11).

6. The portable pupil observation and measurement device based on image processing according to claim 1, characterized in that: The imaging mechanism (2) is also provided with a lighting module, a power module and a wireless communication module, wherein the lighting module is mainly an LED lighting lamp used to provide a light source for scanning by the CCD camera (21); The power module is used to provide electrical energy to all electrical components; The wireless communication module is at least one of Bluetooth and WiFi, and is used to connect the data display (11) to the hospital's EMR system and HIS system; The CCD camera (21) is mainly a linear array CCD camera, which uses its grating ruler to provide coordinates and has high accuracy.

7. A portable pupil observation and recognition method based on image processing according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, aligning the opening of the auxiliary component (3) with the periorbital area and fitting it so that the plurality of tension plates (311) are in contact with the periorbital skin, and adjusting the inclination of the plurality of tension plates (311) so as to stretch the periorbital skin outward; S2, positioning the iris and pupil of the eyeball between the apertures formed by the illumination of a plurality of laser emitting lamps (23), and simultaneously illuminating any area of ​​the pupil with the cross light source of the infrared illumination source (22) as a coordinate; S3, before the LED lighting is turned on, the CCD camera (21) scans the pupil multiple times, the number of scans being no less than 30 times, and the data information is sent to the data display (11) through the microprocessor; When the LED lighting is turned on, the CCD camera (21) scans the pupil multiple times, the number of scans being no less than 30 times, and the data information is sent to the data display (11) through the microprocessor.

8. A portable pupil observation and measurement method based on image processing according to any one of claims 1 to 7, characterized in that: The following steps are involved: a. Before the LED lighting is turned on, the pupil is illuminated by a cross light source of an infrared lighting source (22), and the CCD camera (21) is used to take multiple images, and the frame rate is set to at least 60 frames. The collected image is first grayscaled to increase the contrast, and the pupil grayscale is smaller than the iris grayscale. Then, the image is binarized to make the image black and white, and the pupil area is further separated; The pupil shape is approximately a circle. In the plane coordinate system after imaging, the coordinates of the four intersections of the pupil edge and the cross light source coordinate axis are: M(x1,0), N(x2,0), P(0,y1), Q(0,y2). The diameter is calculated based on the unique fitting circle, where R is the diameter of the circle and r is the radius of the circle: The formula is as follows: r= ,R=2r; b, after multiple imaging, the multiple diameter data are measured to calculate the pupil change rate during the irradiation process, the formula is as follows: S = (R1 -R2) / R1; Wherein, S is the change rate, R1 is the maximum value of the pupil diameter change, and R2 is the minimum value of the pupil diameter change. The patient's condition is determined by comparing the measured change rate and diameter value with the data in the hospital's EMR system and HIS system; c. After the LED lighting is turned on, repeat the above steps a and b, and calculate the time of the patient's pupil change. The formula is as follows: t0 = t2 -t1; Among them, t0 is the change time, t2 is the light exposure time, and t1 is the time when R is in the initial resting state. The patient's condition is judged by comparing the measured change time with the data in the hospital EMR system and HIS system.

Images