JPH065537B2 - Information retrieval device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information retrieval device for retrieving a desired image frame by detecting a mark on an information recording medium such as a microfilm by a detection means.

(Prior Art) Conventionally, a search device incorporated in a film reader or the like uses a film in which a search mark is attached to the side of each frame of the film, and the mark is optically detected by the search means. The desired frames in the film are automatically searched for by counting the numbers with a processing means such as a microprocessor.

(Problems to be Solved by the Invention) However, in order to process the mark signals input from the detection means one after another at high speed during film search, the processing means counts frames, compares desired frames with frame numbers, Since it is necessary to issue a stop signal to the drive circuit for transferring the film in real time, it has been a great limitation in creating the control program.

The present invention is to solve the above-mentioned problems, and operates the processing means by collectively processing the number of frames during the film search, the comparison of the desired frame and the frame number, the signal transmission to the drive circuit, etc. at fixed time intervals. Is intended to be simplified and the degree of freedom in creating a control program can be expanded.

(Means for Solving the Problem) In an information retrieval device that detects a mark attached to an image frame of an information recording medium by a detection unit and retrieves an image frame previously input from an input unit, a predetermined time During this period, the mark information detected by the detection means is stored in the storage means, and the mark information stored in the storage means is counted and calculated every time a predetermined time elapses.

(Operation) The mark information detected by the detection means during a predetermined time is stored in the storage means, and the mark information stored in the storage means is counted and calculated every time the predetermined time elapses.

(Embodiment) Next, the present invention will be described based on an embodiment shown in the accompanying drawings.

FIG. 1 shows a film feeding section of a film reader to which the present invention is applied. In the figure, 1 is a film supply cartridge for storing a long microfilm F as an information recording medium in a roll shape, and 2 is a cartridge 1.
A capstan roller for sending out the microfilm F in the inside, M1 an extraction motor for driving the capstan roller 2, M2 for a film rewinding motor for rotating the film spool in the cartridge 1, and S1 for the support arm 3
Solenoid for bringing the capstan roller 2 into contact with the microfilm F via the support arm 3 and the plunger 3
a, a spring for moving the capstan roller 2 to separate the capstan roller 2 from the microfilm F, S2 is a brake solenoid for the film rewinding motor M2, and when the brake solenoid S2 does not operate, the motor M2 is rotatable. When the brake solenoid S2 is activated (turned on), the brake plate 5 fixed to the motor shaft is attracted to prevent the motor from rotating.

6, 7 are film guide rollers, 8 is a take-up reel, M
3 is a film winding motor for rotating the winding reel 8, and S3 is a brake solenoid for the motor M3.

Further, although not shown, a guide plate for guiding the film along the film feeding path between the cartridge 1 and the take-up reel 8 is provided.

14 is a lamp for illuminating the microfilm F, 15 is a condenser lens, 16 is a projection lens for enlarging and projecting the image of the film F illuminated by the lamp 14 on a screen (not shown), and 17 is each frame of the microfilm F. It is a detection means for detecting the counting mark m provided on the side. The detection means 17 has an optical fiber and a photoelectric conversion element built-in, and detects a mark by interrupting the light beam from the lamp 14 by the mark m when the film F is transferred, and outputs a mark detection signal to a processing means described later. Output.

FIG. 2 is a block diagram showing the main circuit configuration of the present invention.

In the figure, reference numeral 20 is a processing means such as a microprocessor for collectively processing the mark information of the information recording medium (microfilm) F detected by the detection means 17 at a predetermined time interval, and the processing means 20 includes a transfer unit 21 and a storage unit. It is composed of 22, a calculation unit 24, and a control unit 25. The transfer unit 21 stores the mark information detected by the detection unit 17 in the storage unit 22.
The storage unit 22 stores the number of the designated image frame input from the input unit 23 and the mark information transferred from the transfer unit 21 for a predetermined time. The control unit 25 has an input means 23.
The function of controlling the transfer of the microfilm F via the motor drive control circuit 26 and setting the predetermined processing time interval t input from Have. The calculation unit 24 stores the image frame number input from the input unit 23 and the storage unit 22.
The mark information stored therein is compared and calculated, and the result is output to the control unit 25. Reference numeral 27 is a display device for displaying the addresses of image frames.

Next, the operation of the film feeding section will be described.

First, when a desired image frame number and a processing time interval t are input to the input means 23, the motor M1 is driven via the motor drive control circuit 26 and the solenoid S1 is operated. As a result, the capstan roller 2 becomes the cartridge 1.
The microfilm F is pulled out from the cartridge 1 by coming into contact with the microfilm F coming out of the cartridge 1, and the leading end of the microfilm F is fed toward the take-up reel 8. When the leading edge of the microfilm F approaches the take-up reel 8, the take-up motor M
When the leading edge of the microfilm F is wound around the take-up reel 8, the motor M1 and the solenoid S1 are deactivated, but the microfilm F is continuously fed by the rotation of the take-up reel 8.

Then, during feeding of the microfilm F, the mark m detected by the detection means 17 is compared with the frame number input in advance after a predetermined time in the arithmetic unit 24, and if they match, a stop signal is transmitted from the control unit 25 to generate a brake solenoid. S3 operates to brake the take-up shaft 11, and similarly S2 also brakes the shaft of the motor M2 to stop the inertial rotation of the delivery spool, stop the feeding of the film F, and stop the feeding of the film of the desired number. The image is projected on the screen via the projection lens 16.

While the microfilm F is being conveyed, it is judged in the processing means 20 whether or not the information of the search mark m has come, as shown in the flowchart of FIG. 3, and the search mark m is inputted to the transfer section 21. When it does, the mark information is continuously transferred to the storage unit 22. When the search mark m is not input to the transfer unit 21, the control unit 25 determines whether or not a predetermined time interval t has elapsed (step), and if it has elapsed, it is stored in the storage unit 22 during that time. Batch processing of the marked mark information, that is, comparison and calculation with the target image frame number input from the input means 23 (step), and if the target image frame number and the mark information are equal, the motor drive control circuit. The transport of the microfilm F is stopped via 26, and if not equal, the predetermined time t is set again.

In the above step, if the predetermined time t has not elapsed, the control unit 25 causes the processing unit 20 to communicate by communicating with a host computer (not shown) (step).
The abnormality in the inside is checked (step), and the frame number of the mark information input from the detection means 17 to the transfer unit 21 is displayed on the display 27 (step). Then, the input means 23 is operated (step) to adjust the film transport speed during the search (step).

Next, three embodiments will be described in which the target image frame number to be input to the input means 23 and the predetermined time t are specifically set.

First Embodiment (FIGS. 4 and 5) This is a process in which the microfilm F is run at a constant high speed, and a predetermined time interval t ₁ , that is, once every few frames, is calculated by the arithmetic unit 24 as an image frame number. It is an embodiment (FIG. 4 (a)) for comparing and calculating mark information. In the figure, the arrow indicates the movement of the detection means 17 with respect to the microfilm F. In this case, since the frame numbers are compared and calculated only once every several frames, a time delay of several frames occurs with respect to the actual image frame number. However, in general, the transport speed of the microfilm F is adjusted based on the size of the difference between the current image frame number and the target image frame number, and therefore the transport speed decreases as the difference decreases. ,
As shown in FIG. 6B, when the transport speed of the microfilm F is gradually reduced, the mark information is converted into frame numbers at a predetermined time interval t ₁ , and the image frame numbers are more dense as the transport speed becomes slower. As a result of executing the comparison and calculation of, it is possible to accurately stop at the target image frame. That is, since the transport speed gradually decreases as the target image frame is approached, the length of the film transported during the predetermined time t ₁ becomes shorter as shown in FIG. The delay will be less.

The first embodiment will be described based on the flowchart shown in FIG.

First, the conveyance of the microfilm F is started by the above-described operation procedure (step), and a predetermined time interval t ₁ in the processing means 20 is set (step).
When the conveyance of the microfilm F is started, the detecting means 1
The information of the mark m detected by 7 is input to the transfer unit 21, but at this time, the mark information is transferred to and stored in the storage unit 22. Then, when the above-mentioned time interval t ₁ elapses (step), the mark information stored within this time t ₁ is collectively converted into an image frame number (step). Here, it is compared with the image frame number input from the input means 23 in advance (step), if not equal, the process returns to the step, and if they are equal (step), the conveyance of the microfilm F is decelerated via the motor drive control circuit 26, Stop (step).

Second Example (FIGS. 6 and 7) The mark m of the microfilm F usually has three types of marks, large, medium and small, which are in descending order of batch, film S and page. m. When trying to search the address of an image frame (or in the middle of a search), the batch image of the target image frame number and the current image frame
Running the microfilm while comparing file pages, but when the batch values are not equal, comparing file pages does not make sense. In the second embodiment, the mark information is set to be converted even when a predetermined time interval t ₁ and a batch mark come when performing the search in which the batches are not equal to each other.
The deceleration control of the conveyance is performed. A file may be used instead of the batch.

The operation of this embodiment is shown in FIG. The normal operation from step to is the same as in the first embodiment described above. It is determined whether the detected batch mark when a predetermined time interval t ₁ has not elapsed in step, if not the process returns to step, if it is detected at time t _a predetermined time t ₁ step Then, it is determined whether the batch mark is a target batch mark. Therefore, the deceleration control of the microfilm F is executed earlier than in the first embodiment. The mark set with the predetermined processing time interval t ₁ may be the file mark S instead of the batch mark.

Third Embodiment (FIGS. 8 and 9) In this embodiment, the target batch is input to the input means 23, and the operations of steps 1 to 3 similar to those described above are performed to make the target during the search. When the batch and the detected batch match each other, the interval of the predetermined time t ₁ is set to be a short time t _2, and at the same time, from the batch to the file S.
To convert the search mark target to.

The operation of this embodiment will be described based on the flowchart of FIG.

First, steps up to are the same as described above. In the step, the batch mark stored in the storage unit 22 is compared with the mark previously input to the input means 23 (step). When the batch mark is not the target image frame, the process returns to the step. When it is the target image frame (step), the predetermined time is shortened from t ₁ to t ₂ (step), and the search mark target is the file. Change to S. When the time t ₂ has elapsed (step), the data of the file S stored in the storage unit 22 is converted into a frame number (step) and compared with the target frame number input in advance in the calculation unit 24 (step). ), And if they do not match, return to the step. If they match (step), the control unit 25
Outputs a deceleration and stop signal to the motor drive control circuit 26 to stop the film conveyance (step).

In the above embodiment, when the batch is replaced with a file and both the batch mark and the file mark S are equal to the target frame number, the predetermined time interval may be set shorter. The closer the frame number is, the more accurate comparison and calculation of the image frame and the mark information can be performed.

(Advantages of the Invention) Since the present invention is configured as described above, the mark information detected by the detection means during the predetermined time is stored in the storage means, and is stored in the storage means every time the predetermined time elapses. The degree of freedom in creating the control program can be increased by counting mark information and performing arithmetic processing.

[Brief description of drawings]

1 to 9 show an embodiment of the present invention.
FIG. 3 is a schematic perspective view applied to a film reader of microfilm, FIG. 2 is a block diagram showing a main circuit configuration, and FIG.
FIG. 4 is a flow chart showing the operation of the processing means, FIG. 4 (a),
(b), FIG. 6 and FIG. 8 are explanatory views showing the relationship between the films of the first to third embodiments and the processing time intervals, and FIG. 5, FIG. 7, FIG. 9 and FIG. It is a flowchart which shows operation | movement of an example. DESCRIPTION OF SYMBOLS 17 ... Detecting means, 20 ... Processing means 23 ... Input means, m ... Mark F ... Microfilm (information recording medium)

Claims (1)

[Claims] 1. An information retrieving apparatus for retrieving an image frame pre-input from an input unit by detecting a mark provided corresponding to an image frame of an information recording medium by a detecting unit, wherein An information retrieval device characterized in that the mark information detected by the detection means is stored in the storage means, and the mark information stored in the storage means is counted and calculated every time a predetermined time elapses.