JPS63265232A - Information retrieving device - Google Patents

Abstract

PURPOSE:To estimate the position of address of a desirable picture frame in the case of the retrieval of next time and to execute the retrieval for a short time by sequentially storing mark information in the midst of the traveling of an information recording medium and converting the mark information into a real address when one of the addresses of the picture frames is identified. CONSTITUTION:When the mark signal is inputted in the midst of the traveling a film, the information of the mark is sequentially stored in a mark storage memory 22 and the stored contents is converted into the address if the real address becomes distinct after the traveling is completed in the end of the film. When the conversion is completed in a first mark of the film, the addresses of the whole film become clear. Thus, the desirable address position can be estimated in the case of retrieving next, and the retrieval for a short time can be executed by controlling the speed of a motor.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an information retrieval device that automatically searches for desired information on an information recording medium such as a microfilm by counting marks on the information recording medium.

(Prior art) Conventionally, search devices built into film readers and the like use film with search marks attached to the sides of each frame of the film, optically detect these marks, and count them. This allows the desired frame in the film to be automatically searched for.

The above search device illuminates the mark on the film with a lamp,
A mark detector detects changes in the light blocked by the marks when transporting the film, and a counter counts the output signal of this mark detector. The comparison circuit compares the frame number of the image frame with the frame number, and when the two match, the comparison circuit issues a stop signal to the drive control circuit, which stops the drive system that transports the film and projects the desired frame onto the screen. It is designed to remain stationary at a predetermined position.

By the way, as the above-mentioned microfilm, for example, the fifth
As shown in the figure, there is a microfilm 106 on which image frames 107 are recorded in two rows.

108 is a search mark provided on the side of each image frame 107. The photographing method of the film 106 is called dusai, in which images are photographed sequentially from the leading edge of the film on one side of the film.
The film that has been photographed on one side is loaded in the opposite direction, and images are photographed on the other side of the film in order from the rear end, so to speak, this is a reciprocating method. In Figure 5,
The left side is the leading edge of the film, the right side is the trailing edge of the film,
This microfilm 106 is made by photographing images in the order of numbers assigned to the images (actually, such numbers are not recorded, but for convenience of explanation, a number is assigned to each image frame). is the A channel, and the lower side is the B channel. Also, to search for images, each image frame 1
Search marks 108 are recorded on the sides of the A channel and B channel corresponding to 07.

(Problem to be solved by the invention) However, in such a conventional example, microfilm 1
When the final address of the B channel of 06 is not clear, this information is meaningless even if the B channel mark is detected while the film is running. Also, even when one of the image addresses in the B channel is found, there is no mark information other than that mark, so the next time you search, you have to run the film again and count the address from the mark information of the same part. However, there is a problem in that the search time becomes long.

Therefore, the present invention has been made to solve the above-mentioned problems of the conventional example, and its purpose is to make it possible to predict the address position of a desired image frame at the time of the next search. An object of the present invention is to provide an information retrieval device that can perform a search in a short time.

(Means for Solving the Problems) To achieve the above object, the present invention detects marks attached to image frames on an information recording medium to search for desired information. The information retrieval device includes a storage means for sequentially storing mark information while the information recording medium is running, and a conversion means for converting the mark information into an actual address when one of the addresses of the image frames is found. It is composed of:

(Function) In the present invention having the above configuration, mark information is sequentially stored in the storage means while the information recording medium is running, and when one of the addresses of an image frame is found, the mark information is transferred to the actual address. The actual address of the mark information already stored in the storage means is attempted to be revealed by converting it into the mark information by the conversion means.

(Example) The present invention will be explained below based on the illustrated example. Fourth
The figure shows a film feeding section of a film league with a search device to which the present invention is applied. Capstan roller for sending out microfilm F, Ml
is a motor that drives the capstan roller 2; M2 is a film rewind motor that rotates the film spool in the cartridge; SQL 1 is a solenoid that brings the capstan roller 2 into contact with the microfilm F via the support arm 3; 4 is a spring that moves the supporting arm 3φ plunger 3a and capstan roller 2 to separate the capstan roller 2 from the microfilm, and 5OL2 is a brake solenoid for the film rewinding motor M2, when this pre-kinlenoid 5OL2 is not activated. is the motor M2
is rotatable, and when the brake solenoid 5OL2 is activated (turned on), it attracts the brake plate 5 fixed to the motor shaft to prevent rotation of the motor.

6.7 is a film guide roller, 8 is a take-up reel, M
3 is a film winding motor for rotating the take-up reel 8, and 5QL3 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 onto a screen (not shown); 17 is a lens for each frame of the microfilm F; This is a known mark detector that detects counting marks m provided on the sides.

The mark detectors 17a and 17b have photoelectric conversion elements, and when the film F is transferred, the light beam from the lamp 14 is interrupted by the mark m, thereby emitting a mark detection signal, and this mark detection signal is used as a count of the search device. It is counted with a machine. Since the details of the search device are publicly known, their explanation will be omitted.

Furthermore, as shown in FIG. 3, the microfilm F of this embodiment has two image frames 18 recorded on it, and a large mark and a small mark m on the sides corresponding to the image frames 18.
This type of shooting method for Microfilm F is called Duo, in which images are shot sequentially from the leading edge of the film on one side, and the film that has been shot on one side is loaded in reverse. Images are taken sequentially from the rear end on the other side of the camera, so to speak, this is a back-and-forth photographing method. In Figure 3, the left side is the direction of the leading edge of the film,
The right side is the rear end of the film, the upper side is the A channel, and the lower side is the B channel.

Furthermore, FIG. 1 is a diagram showing the control system of this embodiment, and in the same figure, 20 is a microprocessor;
This microprocessor-20 includes a mark detector 17a,
A counting section 21 that counts mark detection signals when 17b detects mark text 2m on the film, a mark storage memory 22 that serves as a storage means for sequentially storing the signals counted by the counting section 21, and controls film feeding. The control section 23 is composed of a conversion section 24 as conversion means for converting the mark detection signal into an actual address.

Reference numeral 25 denotes an input device for inputting address information of the image frame 18 to the control unit 23 using keys or the like. 26 is a display that displays the contents of the mark storage memory 22; 27 is a motor drive controller that feeds and stops the film based on control signals from the controller 23; Further, the mark on the A channel is detected by the mark detector 17a, and the mark on the B channel is detected by the mark detector 17b.

In the above configuration, the information retrieval apparatus according to this embodiment performs real address conversion of the B channel mark information according to the flowchart shown in FIG. That is, the search is started in step ■, it is determined whether the film has been fed to the film end in step ■, and when the film has been fed to the film end, the last address of channel A is checked in step ■, and then the search is performed in step ■. In step (2), the last stored contents of the memory are sequentially retrieved, and in step (2), the converter 24 converts the mark information of the B channel following the address of the A channel.

Then, in step ■, it is determined whether or not the conversion has been completed to the beginning of the film, and when the conversion has been completed, the conversion of the B channel address is finished (step ■).On the other hand, in step ■, if the conversion has not reached the end of the film, , further inputs a mark signal in step ■, judges whether or not it is a small mark m in step ■, and if it is a small mark m, stores the information of the small mark m in the next memory (step ■), and then inputs a large mark. In the case of mark reading, the information of the large mark text is stored in the next memory, step o), and these operations are repeated until the end of the film.

That is, when a mark signal is input while the film is running,
This mark information is sequentially stored in the mark storage memory 22, and when the end of the film is reached and the actual address is clear, this stored content is converted into an address, and then Once the conversion is complete up to the mark, the address of the entire film is obvious.
When searching next time, the desired address position can be predicted, and by controlling the speed of motor M2 or M3, a short search can be performed.

In the above embodiment, if after loading the film F, the film F is run to the end while memorizing the mark information, when the film F reaches the end, the address connection from the A channel to the B channel will be established. is known, the entire address position can be immediately known even if the B channel address is not set, and a high-speed search becomes possible.

Also, even during the search, when the address of the image frame on the B channel is set from the input device 25, etc.
By converting the previously stored mark information into addresses, the address arrangement of a portion of the film F can be determined.

In the above embodiment, an example was described in which the present invention was applied to a duo film, but it can also be applied to a micro film of a normal photographing method.

(Effects of the Invention) The information retrieval device according to the present invention has the above-described configuration and operation, and can store mark information even when the actual address of an image frame on an information recording medium is unknown. If the mark information is converted into an address when the address is known, the actual address of the part that has already been stored becomes clear, and the time required for the next search can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a control system in an embodiment of an information retrieval device according to the present invention, FIG. 2 is a flowchart of the embodiment, FIG. 3 is a partial plan view showing a film in the embodiment, and FIG. The figure is a schematic perspective view showing the film feeding section of the film league to which the same embodiment is applied, and FIG. 5 is a partial plan view of the Duo film. Explanation of symbols 21... Counting section 22... Mark storage memory (storage means) 23... Control section 24... Conversion section (conversion means) 25... Input device F... Microfilm (information Recording medium) Patent applicant Canon Co., Ltd. ("ll'l;7.F7'::'-
:”'・, Agent: Yoshikazu Kita, Patent Attorney, “Ma 1. −． 7゜Representative Patent Attorney Oku 1) Noriyuki 1.・-Figure 1 Figure 3 Figure 2

Claims (1)

[Claims] In an information retrieval device that searches for desired information by detecting marks attached to image frames on an information recording medium,
The present invention is characterized by comprising a storage means for sequentially storing mark information while the information recording medium is running, and a conversion means for converting the mark information into an actual address when one of the addresses of the image frames is known. Information retrieval device.