JPH0876233A - Magnetic recording method - Google Patents

Abstract

PURPOSE: To provide a magnetic recording method by which an abnormal magnetic recording state caused by interrupting the execution of magnetic recording can be detected in photographic film having a magnetic recording layer. CONSTITUTION: A recording area 53 for detecting normal recording is provided in a magnetic track 52 corresponding to each frame in the photographic film where magnetic recording can be performed. In the case of recording information concerning each frame on the photographic film, the photographic film is consecutively fed and information concerning each frame is written in the magnetic track 52 corresponding to each frame. Data for detecting the normal recording different from that in the case of recording the magnetic information previous time is recorded in the recording area 53 for detecting the normal recording. Two kinds of data, for example, '0' and '1' are considered as the data for detecting the normal recording and either of data is alternately used every time the magnetic information is rewritten. Therefore, '0' or '1' is recorded through all the recording areas 53 for detecting the normal recording only when the magnetic recording is normally performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording method for a photographic film, and more particularly to a magnetic recording method which enables detection of abnormal recording data.

[0002]

2. Description of the Related Art Conventionally, in a film capable of recording magnetic information, a method of recording information about each frame on a magnetic track corresponding to each frame is known. In a system for performing such magnetic recording, a magnetic information write error due to garbled bits can be detected using a means such as parity check.

[0003]

However, when the writing of the magnetic information is interrupted in the middle of the film and old data remains, the conventional write error detecting means interrupts the writing in the middle. I can't judge what happened. In particular, when the magnetic recording system stops between magnetic tracks due to a power failure or the like, the magnetic information recorded on the film is judged to be normal, and various kinds of processing are performed based on this incorrect information. There was a flaw.

The present invention has been made in view of the above circumstances. In a system for continuously recording various information on a magnetic track corresponding to each frame of a magnetically recordable film, the system may be interrupted during a power failure or the like. It is an object of the present invention to provide a magnetic recording method capable of detecting this abnormal recording state when stopped.

[0005]

In order to achieve the above object, the present invention relates to each frame to a magnetic track corresponding to each frame of a film by continuously feeding a photographic film having a magnetic recording layer. A magnetic recording method for collectively recording information to be recorded, wherein a recording area for recording any one of a plurality of pieces of data for normal recording detection is provided on a magnetic track of each frame, and is recorded in the recording area during magnetic recording. It is characterized in that the data is rewritten to different data.

[0006]

According to the present invention, when the information on each frame is recorded on the film, the photographic film is continuously fed and the information on each frame is written on the magnetic track corresponding to each frame. At this time, in the recording area for normal recording detection provided in each magnetic track, data different from that at the time of previous recording of the first data and the second data is also written. That is, if the first data was recorded during the previous magnetic information recording, this time is rewritten with the second data, and conversely, if the second data is recorded during the previous magnetic information recording, the first data is recorded this time. Rewrite this with the data of. If, during recording of magnetic information on a magnetic track, a power failure etc. occurs and magnetic recording is not normally performed until the end, the value of the above normal recording detection data will change in the middle magnetic track. Therefore, it can be determined that this film is in an abnormal recording state.

[0007]

The preferred embodiments of the magnetic recording method according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a block diagram showing the internal structure of a film scanner to which the magnetic recording method according to the present invention is applied.

As shown in FIG. 1, this film scanner has a film transporting section for transporting the film, an image reading section for photographing a film image and storing the image data in an image memory, and a magnetic information writing / writing section. It is composed of a magnetic recording / reproducing section for reading, a carrying state detecting section for detecting the carrying state of the film, and a CPU 30 for controlling each section.

The film transport section is a film supply section in which the film cartridge 10 is mounted, and a reel 1 for winding the film transported from the film supply section.
The film winding unit 2 is configured to be wound by 2 and a capstan 14 that is disposed in the film transport path and controls the film transport speed. The image reading unit is
A light source 16 for illuminating a film image and a CCD line sensor 20 for measuring the film image illuminated by the light source 16.
Output from the CCD line sensor 20 and a CCD line sensor 20 for converting the image light formed by the lens 18 into R, G, and B signal charges in an amount according to the intensity of light. A / D converter 22 for converting the generated image signal into a digital image signal, and A / D converter 2
2 and an image memory 24 for storing the digital image signal output from the digital camera 2.

The magnetic recording / reproducing section is composed of a magnetic head 28, which reads information written in the magnetic recording layer of the film and writes information in the magnetic recording layer. The transport state detection unit,
The conveyance state detection optical sensor 26 is configured to irradiate the film with light to detect the reflected light and detect the perforations formed in the film.

The CPU 30 controls the film transport section, the image reading section, and the magnetic recording / reproducing section on the basis of the perforation position detected by the transport state detection optical sensor 26. The processing procedure of the film scanner having the above-described configuration will be described with reference to the flowchart of FIG.

When the developed film cartridge is set in the film supply section (S10), the film is conveyed from the film supply section to the film winding section at high speed. Then, the magnetic information recorded on the leading end of the film and the magnetic tracks corresponding to each frame is read by the magnetic recording / reproducing unit and stored in the RAM (not shown) (S1).
2).

When the above processing is completed, the film image is scanned by transporting the film at a low speed, the image data showing the film image is stored in the image memory 24, and the image data is read from the image memory 24 and not shown. A film image is displayed on the monitor (S14). Subsequently, various magnetic information of the frames displayed on the monitor by an on-screen interactive method using a mouse or other input means (for example, the number of prints, trimming (print center position, zoom magnification), print paper type, etc.). Order information to the lab) and store it in RAM. If the same kind of magnetic information is already stored in the RAM, it is changed to the newly input magnetic information (S16).

When the input or change of the magnetic information for each frame is completed in this way, the film is rewound once,
After that, the film is sent out at high speed, and during the film transport, the information about the entire film and the information about each frame are read from the RAM and written on the magnetic track of the film via the magnetic head 28 (S18). At this time, the normal recording detection data in the normal recording detection recording area secured at the rear of the magnetic track is rewritten to a value different from the value at the previous recording. For example, if the value of the normal recording detection data at the time of the previous recording is 0, 1 is recorded this time. Conversely, the value of the normal recording detection data at the time of the previous recording is 1
If this is the case, 0 is recorded this time.

After the new information is stored in the magnetic recording layer of the film as described above, the film is managed according to this information. FIG. 3 is a schematic view showing an example of a photographic film having a magnetic recording layer and perforations used in the film scanner of FIG. Film 50
Has a magnetic recording layer formed by coating the entire surface with a transparent magnetic material on the side opposite to the emulsion layer. At the lower end of each frame area 56, a magnetic track 52 for recording information on this frame is secured along the longitudinal direction of the film. A magnetic track 58 for recording information about the entire film is secured at the leading end of the film. A recording area 53 for recording normal recording detection data is provided at the end of each of the magnetic tracks 52 and 58. At the time of storing the film, the film 50 is wound and stored by a single spool (not shown) provided inside the film cartridge 10.

The perforations 54 are holes formed in a rectangular shape, and one perforation 54 is arranged for each frame. FIG. 4 is a diagram showing a recording state of the recording area 53 for detecting normal recording in the film 50. FIG. 3A shows a state in which magnetic recording is normally performed on the magnetic track, and the recording area 5 for normal recording detection is shown.
In all 3, normal recording detection data of 0 is recorded.

On the other hand, in FIGS. 9B, 9C and 9D, the magnetic information after the change is recorded on the film in the state shown in FIG. 9A by the magnetic information changing procedure, and the normal recording is detected. Shows the state in which the usage data has been changed. That is, FIG. 6B shows a state in which magnetic recording is normally performed to the end, and all normal recording detection data are changed to 1.

FIG. 6C shows a state in which a power failure has occurred at the position indicated by the arrow and writing has been interrupted while information is being written on the magnetic track. According to the figure, the normal recording detection data of the magnetic track written before the power failure is changed to 1, but remains 0 after the power failure. FIG. 6D shows a state in which a power failure has occurred at the time when writing is not performed between the magnetic tracks (the position of the arrow in the drawing). Similar to FIG. 6C, the normal recording detection data is changed to 1 before the power failure, but remains 0 after the power failure.

As described above, as is apparent from FIG. 4, when the recording of magnetic information is not normally performed due to a power failure or the like and the recording is interrupted in the middle, the value of the normal recording detection data changes in the middle of the film. . Therefore, whether or not the magnetic recording is normally performed can be determined by referring to the normal recording detection data. In particular, as shown in FIG. 4D, when a power failure occurs between a magnetic track on which data is not written and a magnetic track, magnetic recording information due to the magnetic recording being stopped midway in the conventional parity check. However, the error can be easily detected by the normal recording detection data.

The magnetic recording state in which the writing is completed in the middle due to a power failure or the like can be detected by referring to the normal recording detection data. However, in the film scanner of the above embodiment, a backup battery, Alternatively, if a capacitance is prepared as a secondary power source, interruption of writing due to power failure or the like can be eliminated. That is, even after the occurrence of a power failure, magnetic information can be written to the end by the secondary power source. Further, if the magnetic information to be recorded on the film is stored in the EEPROM, the flash memory or the like, the magnetic information will not disappear due to the power failure, and the writing can be resumed immediately after the power failure.

[0021]

As described above, according to the magnetic recording method of the present invention, a recording area for normal recording detection is provided on the magnetic track of a magnetically recordable film, and new information is recorded in this recording area. Since data different from the previous recording is written each time, by referring to this normal recording detection data, the magnetic recording is not completed normally until the end of the film, and abnormalities such as power failure occur. It is possible to detect the position where is generated. Therefore, even if a film having such old erroneous information left is brought to another system such as a laboratory, it can be prevented from being processed based on the old information.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a film scanner to which a magnetic recording method according to the present invention is applied.

2 is a flowchart showing a processing procedure of the film scanner of FIG.

FIG. 3 is a schematic view showing an example of a photographic film used in the film scanner shown in FIG.

4A to 4D are views showing states of recording areas for normal recording detection in the photographic film of FIG.

[Explanation of symbols]

 10 ... Film cartridge 12 ... Take-up reel 14 ... Capstan 26 ... Conveyance state detection optical sensor 28 ... Magnetic head 50 ... Film 52, 58 ... Magnetic track 53 ... Normal recording detection recording area 54 ... Perforation 56 ... Frame

Claims (1)

[Claims] 1. A magnetic recording method for continuously recording information relating to each frame on a magnetic track corresponding to each frame of the film by continuously feeding a photographic film having a magnetic recording layer, A recording area for recording any one of a plurality of data for normal recording detection is provided on the magnetic track of each frame, and at the time of magnetic recording, data different from the data recorded in the recording area is rewritten. A magnetic recording method characterized by: