JPH0721611B2 - Information retrieval device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is an information retrieval apparatus for automatically retrieving desired information in an information recording medium such as a microfilm by counting marks on the information recording medium. Regarding

(Prior Art) Conventionally, a search device incorporated in a film reader or the like uses a film having a search mark on the side of each frame of the film, optically detects this mark, and counts it. As a result, the desired frame in the film is automatically searched.

The above search device illuminates the mark on the film with a lamp,
When the film is transferred, the change in the light blocked by the mark is detected by the mark detector, the output signal of the mark detector is counted by the counter, and the count content of the counter and the desired input from the keyboard or the like are input. The comparison circuit compares the frame number of the image frame, and when the two match, the comparison circuit issues a stop signal to the drive control circuit to stop the drive system that transfers the film and project the desired frame on the screen. It is made to stand still at a predetermined position.

In addition, some microfilms have marks of multiple levels, and among the marks of multiple levels, at least one image frame is skipped and searched based on the upper mark (hereinafter referred to as skip search). There are many.

(Problems to be Solved by the Invention) Incidentally, in such a conventional example, when performing a skip search every n frames from a certain arbitrary image frame,
As shown in the figure, K (n + 1) +1 (k: integer) counting from the frame m ₁ at which the next upper mark m ₂ has started the skip search
When it is not the second, since it is not possible to skip search from the next upper mark m ₂ in the past, there is no choice but to stop feeding the film F once, return the film F to the next upper mark m _2, and reset and restart. There wasn't. As a result, the search time is wasted, the operation is troublesome, and the search speed is reduced.

Therefore, the present invention has been made to solve the above-mentioned problems of the conventional example, and the purpose thereof is to set the interlacing interval once and perform the interlaced search with the upper mark as a reference. It is to provide an information retrieval device.

(Means for Solving Problems) In order to achieve the above object, in the present invention, a detection means for detecting at least two types of marks provided corresponding to image frames of an information recording medium, Input means for arbitrarily setting the number of image frames to be searched while jumping over the information recording medium, and transporting the information recording medium, and detecting the number of lower-level marks corresponding to the set number of frames during the transport. After detecting by the means, the operation of stopping the information recording medium by the detection of the next lower level mark and starting the transfer after a predetermined time is repeated, and when the upper level mark is detected during the transfer of the information recording medium, After detecting the mark of the upper level, the information recording medium is stopped by detecting the mark of the next lower level after detecting the mark of the lower level of the number corresponding to the set number of image frames. After a predetermined time, characterized by comprising a means for controlling so as to initiate the transfer.

(Operation) In the present invention having the above configuration, at the time of search, the number of interlaced frames of image frames is reset by the mark of the upper level among the marks of the plurality of levels, and the interlace interval set by the input means from the mark of the upper level By restarting the search in, the interlace search can be performed based on the upper mark by setting the interlace interval once.

(Example) Below, this invention is demonstrated based on the Example shown in figure. Second
The figure shows a microfilm reader to which the present invention is applied. In the figure, 1 is a film supply cartridge for accommodating a microfilm F as an information recording medium in a roll shape, and M1 is for rewinding the film on a film reel in the cartridge. Motor, SOL1 is a film rewinding motor
The brake solenoid for M1. When the brake solenoid SOL1 does not operate, the feed spool motor M1 can rotate. Prevent the rotation of.

3, 4 are film guide rollers, 7 is a take-up reel, M2 is a film take-up motor for driving the take-up reel 7, and SOL2 is a brake solenoid for the motor M2. When the brake solenoid SOL2 operates, the braking plate 6 fixed to the motor shaft is attracted to prevent the winding motor M2 from rotating.

Although not shown, the cartridge 1 and the take-up reel 7
A guide plate for guiding the film F is provided along the film feeding path between the and. 11 is Microfilm F
Lamp to illuminate, 10 is a condenser lens, 8 is a lamp
A projection lens for enlarging and projecting the image of the film F illuminated by 11 on a screen (not shown), and 9 is a mark detector for detecting the counting mark m provided on the side of each frame of the microfilm F.

The mark detector 9 has a photoelectric conversion element, and when the film F is fed, the light beam from the lamp 11 is interrupted by the marks m ₁ and m ₃ to generate a mark detection signal, and this mark detection signal is searched. It is counted by the counter of the device. Since the details of the counting device based on the mark signal are known, the description thereof will be omitted.
The mechanism for pulling out the film F from the cartridge 1 is also known and will not be described.

Further, FIG. 1 is a block diagram showing a control system of the present embodiment. In FIG. 1, 9 is the mark detector, 20 is a CPU as a control means, 21 is a keyboard as an input means, 22
Is a mark length discriminating circuit for discriminating the length of the mark attached to the microfilm F, 23 is a memory, and 24 is a film F by controlling the motors M1 and M2 based on a control signal from the CPU 20.
Is a motor control circuit for feeding / stopping.

In the above configuration, the number of frames (the number of skipped frames) n for skipping and searching at least one of the image frames and the stop time t for projecting on a screen (not shown)
And are taken into the CPU 20 from the keyboard 21, and the skip frame number n and the stop time t are stored in the memory 23. A skip search start command is also input from the keyboard 21 and taken into the CPU 20. The mark signal detected by the mark detector 9 is fetched by the CPU 20, and the mark type is discriminated from the lengths of the upper mark m ₁ and the lower mark m ₃ among a plurality of levels, for example, as shown in FIG. The circuit 22 discriminates and outputs the output to the CPU 20.

Thus, when the skip search start command is input from the keyboard 21, the film F is moved from the current stop state to the image frame n frames ahead, and after the time t seconds set by the keyboard 21 at the frame is stopped, Move from frame to image frame n frames ahead. The above operation is continued until the end command is input.

By the way, in this embodiment, the operation is performed as shown in the flowchart of FIG. That is, first, a skip interval (interlacing interval of image frames) n is input from the keyboard 21 in a step, and then, when a search start command is input to the CPU 20 by a key input of the keyboard 21 in a step, the memory 23 for counting skip frames is stored. Clear and reset (step). Then, when the film starts feeding, the mark signal is input in the step, and in the step, it is determined whether or not the mark is the upper mark m ₁ ,
If it is the upper mark m ₁ , the film F is stopped for a set time in step, and the process proceeds to step. On the other hand, if it is the lower mark m ₃ in step, 1 is added to the memory 23 for counting the number of skip frames in step. Then, it is judged whether or not the memory 23 has become n + 1 in step, and if n + 1, the set time is stopped in step, and the steps from to are repeated until the search end signal is input, and the search end signal is input. finish. When it is not n + 1 in step, the process returns to step again.

That is, in FIG. 3, the skip interval n is input as 2, and the skip frame number counting memory is cleared and reset to 0 in the step of FIG. And
Enter the mark signal at step, it is determined whether the upper mark m ₁ in step, in the case of the upper mark m _1, the set time is stopped in step, also memory for skip frame count in the case of the lower mark m ₃ 23 is incremented by 1 (step), and it is judged whether the value of the memory 23 becomes n + 1 at the step, that is, n is 2 at the skip interval, so it is judged whether 2 + 1 = 3, and the third image The step set time is not stopped until the lower mark m ₃ up to the frame is input.

Therefore, in this embodiment, the number of skipped frames (the number of skipped frames) of the image frames is reset by the mark m ₁ of the upper level among the marks of the plurality of levels at the time of search, and then the mark m _{1 of the} upper level is set. The search is restarted at interlaced intervals.

In the above embodiment, the mark length discriminating circuit is used to measure the mark length, but other than this, a film movement amount measuring device, for example, an encoder for sending a pulse in proportion to the film movement amount Good. In this case, use the mark signal as a gate and change the number of pulses output from the encoder.
The mark length can be measured by counting in the CPU.

(Effects of the Invention) The information retrieval apparatus according to the present invention has the above-described configuration and operation, and the interlace retrieval can be performed based on the upper mark only by setting the interlace interval of image frames once. Thus, there is an effect that the waste of the search time can be saved by eliminating the need for such a resetting operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing a control system of an embodiment of an information retrieval apparatus according to the present invention, FIG. 2 is a perspective view of an essential portion showing a retrieval portion of a microfilm reader to which the embodiment is applied, and FIG. FIG. 4 is an explanatory view showing a search operation in the same embodiment, FIG. 4 is a flow chart showing an operation of a control system in the same embodiment, and FIG. 5 is an explanatory view showing a conventional search operation. Explanation of code 9 …… Mark detector 20 …… CPU (control means) 21 …… Keyboard (input means) F …… Microfilm (information recording medium) m ₁ …… Higher mark, m ₃ …… Lower mark

Front page continuation (72) Inventor Toshiko Moriya 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Shigeru Sugita 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Jin Yanagawa 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Kazuo Otani 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) Reference Documents JP 61-116339 (JP, A) JP 60-33664 (JP, A)

Claims (1)

[Claims] 1. A detection means for detecting at least two kinds of marks provided corresponding to image frames of an information recording medium, and an input means for arbitrarily setting the number of image frames to be searched while jumping over the information recording medium. The information recording medium is transferred, and after the number of lower level marks corresponding to the set number of frames is detected by the mark detecting means during the transfer, the information recording medium is stopped by the detection of the next lower level mark. When the upper level mark is detected during the transfer of the information recording medium by repeating the operation of starting the transfer after a predetermined time, after detecting the upper level mark, the number of images corresponding to the set number of image frames is detected. Means for controlling to stop the information recording medium by detecting the mark of the lower level and detect the mark of the next lower level, and to start the transfer after the predetermined time. Information retrieval apparatus according to symptoms.