CN110427934B - Film reading system and film image information processing method - Google Patents
Film reading system and film image information processing method Download PDFInfo
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- CN110427934B CN110427934B CN201910568708.XA CN201910568708A CN110427934B CN 110427934 B CN110427934 B CN 110427934B CN 201910568708 A CN201910568708 A CN 201910568708A CN 110427934 B CN110427934 B CN 110427934B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/24—Aligning, centring, orientation detection or correction of the image
- G06V10/245—Aligning, centring, orientation detection or correction of the image by locating a pattern; Special marks for positioning
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Abstract
The invention relates to a film reading system and a film image information processing method, which can realize the automatic positioning function of microfilm and facilitate retrieval. The film reading system comprises a film dragging device, an image information acquisition device, a first sensor device, a second sensor device, an information processing unit and a display unit; the film dragging device is used for dragging the film to move along a preset track; the image information acquisition device is arranged at a preset position of the preset track and is used for acquiring image information of the film passing through the preset position; the first sensor device is used for acquiring distance information of film movement; the second sensor device is used for acquiring specific information on the film; the information processing unit is used for controlling the film dragging device to start and stop according to a preset rule according to the distance information acquired by the first sensor device and the specific information acquired by the second sensor device, and controlling the image information acquisition device to acquire the image information of the film.
Description
Technical Field
The invention relates to the technical field of microfilm display, in particular to a film reading system and a film image information processing method.
Background
Microfilm is a carrier that uses the chemical nature of film to record information and can record a large amount of data information. Usually, a disc of 16mm microfilm has about 2500 frames, and 35mm microfilm has about 600 frames, and because of the large number of frames, when searching film information for reading, the microfilm reel handle is manually rocked to search, the arm is required to continuously rock, and the operation is very laborious when the quick search is required. In order to achieve accurate positioning of films, the conventional film running mechanism driven by electric power is complex in structure, high in cost, inconvenient to use and low in efficiency of searching recorded information. The microfilm scanning technology is a technology for scanning the existing microfilm according to a certain standard format, restoring the graph on the film into digital images for storage and utilization, and the digital information is more convenient to transmit and review in the computer network system environment. The microfilm reader widely used at present does not provide the functions of automatic positioning of pictures and information processing, and can only rely on a user to manually control the microfilm to rotate clockwise or anticlockwise, and the rotating speed generally has two gears of high speed and low speed.
Disclosure of Invention
In order to solve the above technical problems or at least partially solve the above technical problems, the present invention provides a film reading system and a film image information processing method.
In a first aspect, there is provided a film reading system including a film dragging device, an image information acquisition device, a first sensor device, a second sensor device, an information processing unit, and a display unit; the film dragging device is used for dragging the film to move along a preset track; the image information acquisition device is arranged at a preset position of the preset track and is used for acquiring image information of the film passing through the preset position; the first sensor device is used for acquiring distance information of film movement; the second sensor device is used for acquiring specific information on the film; the information processing unit is used for generating a control signal according to the distance information acquired by the first sensor device and the specific information acquired by the second sensor device, wherein the control signal is used for controlling the film dragging device to start and stop according to a preset rule and controlling the image information acquisition device to acquire the image information of the film; the display unit is used for displaying the image information acquired by the image information acquisition device.
In a first possible implementation, the film dragging device comprises two parallel reels and a driving mechanism for driving the two reels to rotate; the two ends of the film are connected to two parallel scroll shafts, and the two parallel scroll shafts can respectively wind and release the film when rotating in the same direction; the output shaft of the driving mechanism is coaxially provided with two driving wheels which can rotate unidirectionally relative to the output shaft, and the two driving wheels can rotate in opposite directions; and when the output shaft rotates in one direction, one driving wheel can drive one parallel scroll to rotate, and when the output shaft rotates in the other direction, the other driving wheel can drive the other parallel scroll to rotate.
In combination with the above possible implementation manner, in a second possible implementation manner, the driving wheel is composed of a wheel body and a unidirectional bearing, and an outer ring of the unidirectional bearing can only rotate in one direction relative to an inner ring, and the inner ring is fixed on an output shaft of the driving mechanism.
In combination with the above possible implementation manner, in a third possible implementation manner, the first sensor device includes a driven wheel and a counter, the driven wheel being driven by the film and being movable at an equal linear speed, the counter being used for counting the number of revolutions of the driven wheel.
In combination with the above possible implementation manner, in a fourth possible implementation manner, the driven wheel and the film are driven by static friction force.
In combination with the above possible implementation manner, in a fifth possible implementation manner, the second sensor device is configured to detect a reflected or projected optical signal within a predetermined width range on the film.
With reference to the foregoing possible implementation manner, in a sixth possible implementation manner, the optical signal is a light intensity signal.
In combination with the foregoing possible implementation manner, in a seventh possible implementation manner, the information processing unit can control start and stop of the film dragging device according to the optical signal acquired by the second sensor device and matched with the predetermined threshold.
In combination with the foregoing possible implementation manner, in an eighth possible implementation manner, the information processing unit can control start and stop of the film dragging device according to a change amplitude of the optical signal acquired by the second sensor device and matched with a predetermined threshold.
With reference to the foregoing possible implementation manner, in a ninth possible implementation manner, the information processing unit is capable of: acquiring a point in time when the second sensor means detects a reflected or projected light signal within a predetermined width range on the film; acquiring distance information acquired by a first sensor device after a time point; comparing the distance information with a first preset distance value, and controlling the driving mechanism to stop rotating when the acquired distance information is equal to the first preset distance value; controlling an image information acquisition device to shoot first image information; controlling the driving mechanism to start; continuously acquiring the distance information acquired by the first sensor device, and controlling the driving mechanism to stop rotating when the distance information acquired by the first sensor device is equal to a second preset distance value; controlling the image information acquisition device to shoot second image information; the first image information and the second image information are combined into one integrated image information.
In combination with the foregoing possible implementation manner, in a tenth possible implementation manner, the film reading system further includes a light source unit, and the light source unit can emit light to irradiate the film, and the light reflected or transmitted by the film can be acquired by the image information acquiring device.
In combination with the foregoing possible implementation manner, in an eleventh possible implementation manner, the light source unit includes a planar light source composed of three primary colors of red, green and blue.
In a second aspect, a film image information processing method is provided, which can be implemented by the film dragging device, the image information acquisition device, the first sensor device, the second sensor device, and the information processing unit described in the first aspect, and specifically includes: acquiring a point in time when the second sensor means detects a reflected or projected light signal within a predetermined width range on the film; acquiring distance information acquired by a first sensor device after a time point; comparing the distance information with a first preset distance value, and controlling the film dragging device to stop rotating when the acquired distance information is equal to the first preset distance value; controlling an image information acquisition device to shoot first image information; controlling the film dragging device to start; continuously acquiring the distance information acquired by the first sensor device, and controlling the film dragging device to stop rotating when the distance information acquired by the first sensor device is equal to a second preset distance value; controlling the image information acquisition device to shoot second image information; the first image information and the second image information are integrated into one image information.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: the invention provides a film reading system, wherein a first sensor device is used for acquiring distance information of film movement; the second sensor device is used for acquiring specific information (such as light information at the junction of two films) on the films; the information processing unit is used for generating a control signal according to the distance information acquired by the first sensor device and the specific information acquired by the second sensor device, wherein the control signal is used for controlling the film dragging device to start and stop according to a preset rule and controlling the image information acquisition device to acquire the image information of the film. The information processing unit can judge the boundary of two pictures on the film according to the information of the film acquired by the first sensor device and the second sensor device, and control the film dragging device to drag the film to stay at the proper position of the image information acquisition device, thereby realizing automatic positioning and facilitating retrieval.
Drawings
FIG. 1 is a schematic diagram of a film reading system according to an embodiment of the present invention;
FIG. 2 is a top view of the film reading system of FIG. 1 with the housing removed;
FIG. 3 is a schematic diagram of a film pulling device in the film reading system of FIG. 1;
fig. 4 is a system block diagram of the film reading system of fig. 1.
Reference numerals:
10-fixing plate, 100-film dragging device, 200-image information acquisition device, 300-first sensor device, 400-second sensor device, 500-light source unit;
110-a driving mechanism, 111-an output shaft, 112-a first driving wheel, 113-a second driving wheel, 114-a belt and 115-a belt;
122-of a sheet placing shaft, 123-of a sheet collecting shaft, 124-of a receiving disc, 125-of a receiving disc, 126-of a tensioning wheel and 127-of a tensioning wheel;
a-microfilm, m-boundary, n-boundary.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be understood that the depicted embodiments are some, but not all, embodiments of the present invention. The specific embodiments described herein are to be considered in an illustrative rather than a restrictive sense. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
The invention provides a film reading system, which comprises a film dragging device, an image information acquisition device, a first sensor device, a second sensor device, an information processing unit and a display unit. The film dragging device is used for dragging the film to move along a preset track; the image information acquisition means is provided at a predetermined position of the predetermined track, and can acquire image information of the film at the predetermined position in a film stationary state. The first sensor device is used for acquiring distance information of film movement; the second sensor device is used for acquiring specific information (such as light information at the junction of two films) on the films; the information processing unit is used for generating a control signal according to the distance information acquired by the first sensor device and the specific information acquired by the second sensor device, wherein the control signal is used for controlling the film dragging device to start and stop according to a preset rule and controlling the image information acquisition device to acquire the image information of the film; the display unit is used for displaying the image information acquired by the image information acquisition device. The information processing unit can judge the boundary between the two pictures according to the information of the films acquired by the first sensor device and the second sensor device, and control the film dragging device to drag the films to stay at the proper position of the image information acquisition device, thereby realizing automatic positioning and facilitating retrieval.
Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a film reading system according to an embodiment of the present invention, fig. 2 is a top view of the film reading system of fig. 1 with a casing removed, fig. 3 is a schematic structural diagram of a film dragging device 100 of the film reading system of fig. 1, and fig. 4 is a system block diagram of the film reading system of fig. 1.
In the present embodiment, the film reading system includes a film drag device 100, an image information acquisition device 200, a first sensor device 300, a second sensor device 400, an information processing unit (not shown), a display unit (not shown), and a light source unit 500. The film dragging device 100 is used to drag the microfilm a to rotate forward or backward, passing under the lens of the image information acquiring device 200 (digital camera), thereby facilitating the image information acquiring device 200 to acquire film information. The first sensor device 300 may indirectly measure the distance that the film moves, and the second sensor device 400 may determine the boundary between two pictures on the microfilm a, and based on the above information, the information processing unit may control the start and stop of the drag system and position a certain film of the microfilm a under the lens of the image information acquiring device 200 or at another predetermined position, so that a correct image is displayed on a display unit such as a liquid crystal display. The above-described structure will be described in detail below.
The display unit is a 4K resolution display, the image information acquisition device 200 is a 1400 ten thousand pixel camera module, the information processing unit is a touch function tablet computer with ultra-high definition display output, and the first sensor device 300 is an optocoupler and a code disc for running film detection. Data can be transmitted between the information processing unit and the image information acquisition device through USB 3.0. The information processing unit transmits data with the intelligent bus conversion module through the USB port, the intelligent bus conversion module is connected with the digital I/O interface of the bus controller, the digital I/O of the bus controller is electrically connected with the motor driving module, and the motor driving module controls the start and stop and the rotating speed of the stepping motor through the electrical connection. The sensor can directly acquire the film boundary information, and the boundary information can be used as a reference for starting and stopping the motor by the information processing unit, so that the accuracy of the stepping motor is not required to be relied on to calculate the film boundary, and the control complexity can be reduced. In some alternative embodiments, a PWM input-output controller and a dc motor may also be used to drive the drag system.
The film dragging device 100 is used to drag the microfilm a to move along a predetermined trajectory. The film dragging device 100 includes two parallel reels and a driving mechanism 110 for driving the two reels to rotate, wherein the two parallel reels are a film discharging shaft 122 and a film collecting shaft 123 respectively, and the driving mechanism 110 is a gear motor.
The film feeding shaft 122 is rotatably disposed on a frame of the film reading system, and a receiving tray 124 is disposed at one end of the film feeding shaft 122, and the receiving tray 124 can rotate along with the film feeding shaft 122. The film collecting shaft 123 and the film placing shaft 122 are arranged at a parallel interval, the film collecting shaft 123 is also rotatably arranged on the frame, and one end of the film collecting shaft is coaxially provided with a receiving disc 125 which can rotate along with the film collecting shaft. Both ends of the microfilm a are fixed to the receiving tray 124 and the receiving tray 125, respectively, and the microfilm a can be wound around or released from the receiving tray when the receiving tray rotates.
The length of the microfilm a is far greater than the distance between the film releasing shaft 122 and the film collecting shaft 123, most of the microfilm a is wound on the film releasing shaft 122 or the film collecting shaft 123, and the part of the microfilm a between the film releasing shaft 122 and the film collecting shaft 123 can pass through a preset distance below the image information obtaining device 200 through the structure guide of the tensioning wheel 126, the tensioning wheel 127 and the like. In this embodiment, four tensioning wheels are provided to set the moving track of the microfilm a, wherein the space between the tensioning wheel 126 and the tensioning wheel 127 is the set position for the image information obtaining apparatus 200 to take a picture.
Specifically, the driving mechanism 110 drives the take-up shaft 123 and the take-up tray 124 to rotate via the belt 114 and the belt 115, respectively. The driving mechanism 100 is a gear motor, and a first driving wheel 112 and a second driving wheel 113 which are coaxial are arranged on an output shaft 111 of the gear motor. The first driving wheel 112 drives the film placing shaft 122 through a belt 115, and the second driving wheel 113 drives the film collecting shaft 123 to rotate through a belt 114.
The first driving wheel 112 and the second driving wheel 113 are unidirectional rotation wheels, and can rotate in a unidirectional direction relative to the output shaft 111, and the directions of the first driving wheel 112 and the second driving wheel 113 can rotate relative to the output shaft 111 are opposite. Specifically, the first driving wheel 112 is composed of a one-way bearing and a wheel body, the one-way bearing includes an inner ring for being fixed on the output shaft 111, and an outer ring rotatable in one direction relative to the inner ring. The wheel body surrounds and is fixed on the outer ring of the one-way bearing, and the circumferential surface of the wheel body is provided with a structure matched with the belt 115. In this embodiment, the belt 115 is a synchronous belt, and the wheel body is a synchronous belt wheel. The second driving wheel 113 has substantially the same structure as the first driving wheel 112, except that the outer race of the one-way bearing is rotatable in the opposite direction with respect to the inner race.
Based on the above structure, when the output shaft 111 rotates in the clockwise direction, the first driving wheel 112 and the output shaft 111 can rotate relatively, and cannot transmit torque; the second driving wheel 113 cannot rotate relative to the output shaft 111, so that the second driving wheel 113 can transmit torque of the output shaft 111, that is, can drive a belt, so as to drive the film collecting shaft 123. When the output shaft 111 rotates in the counterclockwise direction, the first driving wheel 112 and the output shaft 111 cannot rotate relatively, and torque can be transmitted between them, so as to drive the belt 115 to drive the release shaft 122 to rotate. And the second driving wheel 113 and the output shaft 111 can rotate relatively, so that no torque can be transmitted between the two.
When the output shaft 111 rotates clockwise, the second driving wheel 113 drives the film collecting shaft 123 to rotate, and the receiving tray 125 at the end of the film collecting shaft 123 can wind the microfilm a. The other end of the microfilm a is fixed to the receiving tray 124, so that the microfilm a rotates with the receiving tray 125 to drive the receiving tray 124 to rotate (release the microfilm a wound around the receiving tray 124). The receiving tray 124 drives the film placing shaft 122 to rotate, and drives the belt 115 to rotate. Since the first driving wheel 112 and the output shaft 111 can rotate relatively, the first driving wheel 112 and the belt 115 do not obstruct the rotation of the film placing shaft 122, and normal film collection and film placing can be realized. When the output shaft 111 rotates anticlockwise, the relative rotation relationship between the first driving wheel 112, the second driving wheel 113 and the output shaft 111 is converted, so that normal film collection and film release are realized. The film is not broken or bent and stacked due to the difference of the rotation speeds of the film placing shaft 122 and the film collecting shaft 123.
In some alternative embodiments, a ratchet mechanism may be provided to cooperate with the drive wheel to effect unidirectional rotation of the drive wheel relative to the output shaft 111. For example, the driving wheel and the output shaft 111 can rotate relatively in both directions, pawls are arranged on the side surface of the driving wheel, and a ratchet wheel is fixed on the output shaft 111. When the drive wheel has a tendency to rotate clockwise relative to the output shaft 111, the ratchet wheel interferes with the pawl to prevent the drive wheel from rotating; when the driving wheel has a tendency to rotate anticlockwise relative to the output shaft 111, the ratchet wheel and the pawl can move freely relative to each other, and the driving wheel can also rotate relative to the output shaft 111. Both drive wheels on the output shaft 111 may be arranged to control the direction of rotation by a ratchet mechanism.
The image information acquiring apparatus 200 is disposed at a predetermined position of a predetermined track of the movement of the microfilm a, and in this embodiment, the image information acquiring apparatus 200 is located above the film between the tension pulley 126 and the tension pulley 127. The distance between the lens of the image information acquiring apparatus 200 and the microfilm a is set so as to enable the image information acquiring apparatus 200 to be well focused. Microfilm a images between the tension wheel 126 and the tension wheel 127 may be captured by the image information acquisition device 200 and presented in a display unit.
The light source unit 500 is disposed below the film between the tension pulley 126 and the tension pulley 127, and the light beam irradiated by the light source unit 500 can enter the image information acquisition device 200 after passing through the film. The light source unit 500 is a planar light source, and the emitted light is parallel light. The light source unit 500 includes a red light source layer, a green light source layer, and a blue light source layer, the three light source layers are stacked, and the light intensity of each light source layer is individually adjustable, and the three light source layers can be adjusted to have any color. In some alternative embodiments, the light source unit 500 includes two color light sources or one color light source. In other alternative embodiments, the light source unit 500 may also be a point light source or a divergent light source. In other alternative embodiments, the light source unit 500 is disposed at the same side of the microfilm a as the image information acquiring device 200, and the light irradiated from the light source unit 500 to the surface of the microfilm a may enter the image information acquiring device 200 and be captured by the image information acquiring device 200 after being reflected by the microfilm a.
In order to obtain movement information of the film, the film reading system is further provided with a first sensor device 300 and a second sensor device 400.
The first sensor device 300 is used to acquire distance information of the movement of the microfilm a. In this embodiment, the first sensor device 300 includes a driven wheel and a counter. The driven wheel is arranged on the moving path of the microfilm a, the microfilm a is tightly attached to the circumferential surface of the driven wheel, and the driven wheel can be driven to rotate by static friction force when the microfilm a moves, namely, the microfilm a and the circumferential surface of the driven wheel do not move relatively, and the linear speeds of the microfilm a and the driven wheel are consistent. The counter is used for counting the driven wheel, the counting information is processed by the information processing unit, and the information processing unit can calculate the moving distance of the microfilm a in cooperation with the diameter value of the driven wheel.
The second sensor device 400 may acquire specific information on the microfilm a, and based on the specific information, a rule may be set to determine where the boundary between two pictures on the microfilm a is located. Specifically, an area perpendicular to the length direction of the microfilm a is provided between two photographs of the microfilm a, and the area does not record graphic information, and thus has a single color and darkness. The information processing unit can control start and stop of the film pulling device 100 according to the optical signal matching the predetermined threshold acquired by the second sensor device 400.
In particular, the second sensor device 400 is disposed at the surface of the segment of the microfilm a between the tension pulley 126 and the tension pulley 127, and the monitoring range of the signal acquisition unit of the second sensor device 400 covers the entire width range of the microfilm a. The distance S between the second sensor device 400 and the framing center of the image information acquisition device 200 is preset and known. 400, the information processing unit may calculate that the distance between the boundary m and the center of view of the image information acquisition apparatus 200 is S. And, the information processing unit also records the distance moved by the microfilm a at this time by the first sensor device 300, and controls the film pulling device 100 to stop operating when the distance is equal to the sum of S and half of the film length value (the distance value between the boundary m and the boundary n). At this time, the image information acquisition device 200 can capture image information of half of the film.
After the image information obtaining device 200 finishes shooting, the information processing unit controls the film dragging device 100 to drive the microfilm a to move an equal distance again, and the other half of the film reaches the shooting range of the image information obtaining device 200, so that the image information obtaining device 200 is started to shoot for the second time. After the information processing unit acquires the two half pictures shot by the image information acquisition device 200, the two half pictures are spliced into a complete picture through a pre-loading program, and finally the complete picture is displayed on the display unit.
The specific information monitored by the second sensor means 400 may be a reflected or projected light signal, such as illuminance information, or brightness information, over a predetermined width on the film.
In some alternative embodiments, the information processing unit can control start and stop of the film pulling device 100 according to the variation amplitude of the optical signal acquired by the second sensor device 400, which matches a predetermined threshold. For example, when the average illuminance value of the film acquired by the second sensor device 400 for the first time is p, the average illuminance of the film acquired next time is q, and the absolute value of the difference between the two illumination intensities is greater than a predetermined value, the information processing unit may identify the position as the boundary of the two pictures. In other alternative embodiments, the second sensor arrangement 400 includes a plurality of probes, where each probe may be considered to be bordered when the signal values acquired by that probe agree or deviate within a predetermined range.
The film reading system provided with the first sensor device 300 and the second sensor device 400 may generate a control signal for controlling the film dragging device 100 to start and stop according to a preset rule and controlling the image information 200 acquisition device to acquire image information of the film based on the distance information acquired by the first sensor device 300 and the specific information acquired by the second sensor device 400. Thus, automatic and accurate film retrieval can be achieved without the need for expensive stepper motors and complex controls.
In some alternative embodiments, the first sensor device 300 includes a counter and engaged large and small wheels, the circumference of the large wheel being in close contact with the microfilm a, the microfilm a being capable of driving the large wheel to rotate, the large wheel driving the small wheel to rotate, the counter detecting the number of revolutions of the small wheel. The information processing unit can calculate the moving distance of the film more accurately according to the diameter value of the small wheel, the revolution number of the small wheel and the transmission ratio of the large wheel and the small wheel.
The present invention also provides a film image information processing method, which can be implemented by the film reading system in the foregoing embodiment.
Step 1, the second sensor device 400 acquires the reflected or projected optical signal value within a predetermined width range on the film, and transmits the optical signal value to the information processing unit. When the acquired optical signal value is equal to a predetermined value, the information processing unit records the point in time.
Step 2, the information processing unit acquires distance information acquired by the first sensor device 300 after the above-described time point.
Step 3, the information processing unit compares the distance information acquired by the first sensor device 300 with a first preset distance value, and controls the film dragging device 100 to stop rotating when the acquired distance information is equal to the first preset distance value. The first preset distance value may be set according to the length of the single film and the distance S between the second sensor device 400 and the shooting center of the image information acquisition device 200. For example, when the length of the photograph that the image information acquiring apparatus 200 can take is half of the length of the single film, the first preset value may be the sum of half the length of the single film and the distance S. For another example, when the length of the photo that the image information obtaining apparatus 200 can take is one third of the length of the single film, the first preset value may be the sum of one third of the length of the single film and the distance S.
Step 4, the information processing unit controls the image information obtaining device 200 to capture the first image information.
Step 5, the information processing unit controls the film dragging device 100 to start.
Step 6, the information processing unit continues to acquire the distance information acquired by the first sensor device 300, and controls the film dragging device 100 to stop rotating when the distance information acquired by the first sensor device 300 is equal to the second preset distance value. The second preset distance value is related to a length value of a photo that the image information acquiring apparatus 200 can take, and is half of a length value of a single film when the image information acquiring apparatus 200 can take a half of a length range of the single film.
Step 7, the information processing unit controls the image information obtaining device 200 to capture the second image information.
Step 8, the information processing unit integrates the first image information and the second image information into one image information.
And 9, the information processing unit displays the integrated image information on the information display unit.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A film reading system, comprising:
a film dragging device for dragging the film to move along a preset track;
the image information acquisition device is arranged at a preset position of the preset track and is used for acquiring image information of the film passing through the preset position;
a first sensor means for acquiring distance information of movement of the film;
second sensor means for detecting reflected or projected light signals over a predetermined width on said film;
an information processing unit, configured to generate a control signal according to the distance information acquired by the first sensor device and the optical signal acquired by the second sensor device, where the control signal is used to control the film dragging device to start and stop according to a preset rule, and control the image information acquiring device to acquire image information of the film;
the film dragging device comprises two parallel scroll shafts and a driving mechanism for driving the two scroll shafts to rotate;
the two ends of the film are connected to the two parallel scroll shafts, and the film is respectively wound and released when the two parallel scroll shafts rotate in the same direction;
the output shaft of the driving mechanism is coaxially provided with two driving wheels which rotate unidirectionally relative to the output shaft, and the rotation directions of the two driving wheels are opposite; and is also provided with
When the output shaft rotates in one direction, one driving wheel drives one parallel scroll to rotate, and when the output shaft rotates in the other direction, the other driving wheel drives the other parallel scroll to rotate;
the information processing unit is capable of
Acquiring a point in time when the second sensor means detects a reflected or projected light signal over a predetermined width range on the film;
acquiring distance information acquired by the first sensor device after the time point;
comparing the distance information with a first preset distance value, and controlling the driving mechanism to stop rotating when the acquired distance information is equal to the first preset distance value;
controlling the image information acquisition device to shoot first image information;
controlling the driving mechanism to start;
continuously acquiring the distance information acquired by the first sensor device, and controlling the driving mechanism to stop rotating when the distance information acquired by the first sensor device is equal to a second preset distance value;
controlling the image information acquisition device to shoot second image information;
synthesizing the first image information and the second image information into integrated image information;
the display unit is used for displaying the image information acquired by the image information acquisition device; and
the light source unit can emit light rays to irradiate the film, the light rays reflected or transmitted by the film can be acquired by the image information acquisition device, and the light source unit comprises a plane light source consisting of three primary colors of red, green and blue.
2. The film reading system of claim 1, wherein the drive wheel is comprised of a wheel body and a one-way bearing, an outer race of the one-way bearing being rotatable in only one direction relative to an inner race, the inner race being secured to an output shaft of the drive mechanism.
3. The film reading system of claim 1, wherein the first sensor means comprises a driven wheel driven by the film and both moving at equal linear speeds, and a counter for counting the number of revolutions of the driven wheel.
4. The film reading system of claim 3, wherein the driven wheel is driven by static friction with the film.
5. The film reading system of claim 1, wherein the optical signal is a light intensity signal.
6. The film reading system of claim 1, wherein the information processing unit is capable of controlling start and stop of the film pulling device based on the optical signal acquired by the second sensor device that matches a predetermined threshold.
7. The film reading system of claim 1, wherein the information processing unit is capable of controlling start and stop of the film pulling device based on a magnitude of change in the optical signal acquired by the second sensor device that matches a predetermined threshold.
8. A film image information processing method, characterized by using the film dragging device, the image information acquisition device, the first sensor device, the second sensor device, and the information processing unit described in claim 1 for processing, comprising:
acquiring a point in time when the second sensor means detects a reflected or projected light signal over a predetermined width range on the film;
acquiring distance information acquired by the first sensor device after the time point;
comparing the distance information with a first preset distance value, and controlling the film dragging device to stop rotating when the acquired distance information is equal to the first preset distance value;
controlling the image information acquisition device to shoot first image information;
controlling the film dragging device to start;
continuously acquiring the distance information acquired by the first sensor device, and controlling the film dragging device to stop rotating when the distance information acquired by the first sensor device is equal to a second preset distance value;
controlling the image information acquisition device to shoot second image information;
and integrating the first image information and the second image information into one image information.
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| CN110427934A (en) | 2019-11-08 |
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