JP5122883B2 - File name conversion method and apparatus, file name conversion program and recording medium - Google Patents

Description

  The present invention relates to a file name conversion method and apparatus for converting a long file name into a short file name, a file name conversion program, and a recording medium on which such a program is recorded.

  A file name managed by most current computer operating systems (hereinafter abbreviated as “OS”) can have a length of 12 characters or more (for example, “This_is_the_file.htm”). Commonly called long file name.

  On the other hand, an OS of a certain system supports only a short file name of 8 + 3 characters (so-called 8.3 format) such as “filename.exe” for historical reasons. Such an old type OS and an application program executed under the old type OS need to be able to handle a file named with a long file name. Therefore, some current OSs generate a long file name (for example, “This_is_the_file.htm”) and a corresponding 8.3 short file name (“This_i˜1.HTM”).

  For example, when an image captured by a single digital camera or a digital camera provided in a portable information terminal such as a mobile phone is stored as a file, a method of automatically generating a shooting date and time as a long file name is known.

  A typical conventional method for converting a long file name in which a serial number is added to the shooting date and time at the beginning to a short file name is as follows. (1) The first three characters after the period of the long file name are used as the extension. (2) Of the 8 characters in the short file name, the last 2 characters are serial numbers beginning with “~ 1”, which is a combination of a tilde “~” and a number. The serial number is used to identify a file in which the first 6 of the 8 characters are common. When the number of such files increases to 10 or more, the number of characters occupied by the serial number is expanded to 3 characters to obtain a serial number (such as “˜10”). (3) All short file names are capitalized.

As another method for generating a short file name corresponding to a long file name, there is, for example, Patent Document 1. In Patent Document 1, a detected long file name is stored in an array, and a short file name is generated by combining the stored array number and a predetermined character string. The advantage of this method is that a short file name can be generated regardless of the number of characters that make up the long file name. Patent Document 1 discloses a file management method in which a generated short file name is also stored in an array and a long file name is managed by the short file name.
JP 2004-185450 A

  The conventional method for converting a long file name in which a serial number is added to the date of creation of a file into a short file name has the following problems. That is, the more long file names that have the same first half, such as image files captured within the same time, the longer it takes to convert the long file name to the short file name. This is because it is necessary to search for a free number as a number following “~” (tilde).

  Therefore, if the conventional short file name generation process is executed simultaneously with saving the image file captured by the camera, the saving takes time, and the user cannot operate the camera during the standby, which may give a frustrating impression.

  On the other hand, the disadvantage of Patent Document 1 is that the application side must ensure a large size array for long file name storage in advance. In addition, when the maximum number of files cannot be specified, it is necessary to secure the number of arrays with a margin, and the memory usage efficiency decreases. In addition, there is a disadvantage that the file correspondence cannot be grasped because the file names are completely different before and after the file name conversion from long to short.

  In view of such problems, an object of the present invention is to provide a file name conversion method that shortens the conversion processing time from a long file name to a short file name and has a clear correspondence between the file names before and after conversion.

To solve the problems described above, in a typical configuration of a file name conversion method according to the invention, the computer, from the top of the category for the file creation date and time of a lower category, were successively arranged a string that represents each category Long Long file name tentative determination process for tentatively determining the file name, and long file name that converts the tentatively determined long file name from a lower category to an upper category, and a long file name in which character strings representing each category are sequentially arranged A preliminary conversion step and a short file name determination step for determining a short file name shorter than the long file name, which is composed of a partial character string at the beginning of the converted long file name and a serial number, are performed. .

  According to the above configuration, the beginning of a long file name can be given distinctiveness by moving a subcategory that is less common and easily fluctuated to the beginning of the file name. This eliminates the need for loop processing such as incrementing the serial number at the beginning of the long file name adopted as the short file name when determining the short file name. Therefore, the effect that the processing time for determining the short file name is shortened can be obtained.

  The long file name determined in the above-described long file name provisional determination step may be composed of each category representing the file creation time. In this case, each category described above may include “year”, “month”, “day”, “hour”, and “minute” at the time of file creation.

  This is because if the file name indicates the point in time when the file is created, it is convenient for subsequent searches by the user.

  The file name conversion method according to the present invention further includes a file name storing step for storing the long file name converted in the long file name preliminary converting step and the short file name determined in the short file name determining step in association with each other. Good.

  According to the present invention, since the short file name includes only “hour” and “minute”, it is difficult to make a search target. In addition, it is difficult to search even when the long file name provided by default by the application software is a file name that does not make sense, such as “Document 1” or “book 1”.

  However, long file names include not only “hour” and “minute” but also “year”, “month”, and “day”. In other words, it is easy to search because it consists of all categories that represent the time of file creation. In addition, since the short file name is composed of a part of the first character string and serial number of the long file name converted in the long file name preliminary conversion step, the short file names are stored in correspondence with each other at a glance. be able to.

  On the other hand, long file names in which character strings are arranged from the upper category to the lower category before conversion are considered to be familiar to the user in many senses, and it is easier to search than those after conversion. There are advantages. From the above viewpoint, it is considered that there is a great effect in storing the long file name before conversion and making it a search target.

  Also, when the long file name before conversion is stored, the correspondence between the long file name and the short file name is clear. This is because the short file name is created by using a part of the long file name.

According to a typical configuration of a file name converter according to the present invention, from the top of the category for the file creation date and time of a lower category, long filenames tentative temporarily determines the long filenames are sequentially arranged a string that represents each category A determination means, a long file name preliminary conversion means for converting the temporarily determined long file name from a lower category to an upper category, and a long file name in which character strings representing each category are sequentially arranged, and the converted long file name And a short file name determining means for determining a short file name shorter than the long file name, which is composed of a partial character string and a serial number at the beginning of the file name.

  The long file name determined by the above-mentioned long file name provisional determination means may be composed of each category representing the time of file creation. In that case, each category may include “year”, “month”, “day”, “hour”, and “minute” at the time of file creation.

  The file name conversion device according to the present invention further includes a file name storage unit that stores the long file name converted by the long file name preliminary conversion unit and the short file name determined by the short file name determination unit in association with each other. Good.

According to a typical configuration of the file name conversion program according to the present invention, the computer temporarily determines the level of the categories for file creation date and time of a lower category, the long filenames are sequentially arranged a string that represents each category Long A temporary file name determination step, a long file name preliminary conversion step for converting the temporarily determined long file name from a lower category to an upper category, and a long file name in which character strings representing each category are sequentially arranged. A short file name determination step for determining a short file name shorter than the long file name, which is composed of a partial character string and a serial number at the beginning of the long file name, is performed .

According to a typical configuration of a recording medium according to the present invention, long filenames on the computer, temporarily determines the level of the categories for file creation date and time of a lower category, the long filenames are sequentially arranged a string that represents each category Temporary determination step, long file name preliminary conversion step for converting the temporarily determined long file name from a lower category to an upper category, and a long file name in which character strings representing each category are sequentially arranged, and the converted long file A file name conversion program for executing a short file name determination step for determining a short file name shorter than a long file name, which is composed of a partial character string at the beginning of the name and a serial number, is recorded. .

  According to the present invention, the processing time for converting a long file name to a short file name is significantly shortened. Further, the memory usage efficiency does not decrease. The correspondence between long file names and short file names is easy to understand.

  Next, embodiments of a file name conversion method and apparatus, a file name conversion program, and a recording medium according to the present invention will be described in detail with reference to the accompanying drawings. In the figure, elements not directly related to the present invention are not shown. Similar elements are denoted by the same reference numerals. Note that dimensions, materials, and other specific numerical values shown in the following embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified.

(File name conversion device)
FIG. 1 is a block diagram showing a portable information terminal which is an embodiment of a file name conversion apparatus of the present invention. The portable information terminal 100 may be a PHS (Personal Handy-phone System), a mobile phone, a PDA (Personal Digital Assistant), or the like.

  The portable information terminal 100 includes a digital camera 110, a recording device 120, a date / time unit 130, and a control unit 140 that controls imaging of the digital camera 110 and file name determination in the recording device 120.

  The control unit 140 includes a long file name temporary determination unit 150, a long file name conversion unit 152, and a short file name determination unit 160, all of which are application programs executed on the portable information terminal 100. It is a subprogram that constitutes a part.

  The recording device 120 further includes a file allocation table (FAT) 170 that records the long file name and the short file name of the image file to be created in association with each other.

(File name conversion method)
FIG. 2 is a flowchart showing the operation of an application program which is an embodiment of the file name conversion method of the present invention executed by the portable information terminal of FIG.

  Hereinafter, step S200 is performed by the long file name provisional determination unit 150 of FIG. Steps S210 to S230 are performed by the long file name conversion unit 152 of FIG.

  First, a long file name is provisionally determined (step S200). The long file name provisional determination unit 150 acquires the date and time at the time of imaging from the date and time unit 130. For example, if the shooting date and time is 13:56 on April 3, 2007, the long file name is temporarily determined as “070403_1356 to 001.jpg”. This is provisionally determined in accordance with a naming rule of adding a serial number “˜001” to the shooting date and time.

  As described above, the long file name is provisionally determined by sequentially arranging the character strings representing the respective categories from the upper category (year) to the lower category (month → day → hour → minute → serial number).

  The feature of this embodiment is that the long file name conversion unit 152 performs preliminary conversion of the long file name before determining the short file name so that the short file name can be efficiently generated (step S210). . In this process, the tentatively determined long file name is changed to a long file name in which character strings representing each category are sequentially arranged from the lower category (serial number) to the upper category (minute → hour → year / month / day). Convert.

  More specifically, move the three characters after the tilde of the long file name to the beginning of the file name, insert an underscore “_”, arrange “minutes” and “hours”, then insert an underscore and add “Year Line up "Month and Date". As a result of the preliminary conversion, the long file name is “001_5613_070403.jpg”.

  The pre-converted long file name is checked to see if it exists in the file system (step S220). If other files created for the same date and time already exist, the long file name is provisionally determined again to “070403_1356 to 002.jpg” with the serial number incremented (step S200). If the pre-converted long file name does not exist, it is determined as a long file name to be stored (step S230).

  When a plurality of files are created for the same “date and time”, a loop process is performed from the time of determining the long file name. However, compared to the number of files created on the same “date and time” and the same “day”, the number of files created on the same “date and time” is small, and the time required for loop processing is small. .

  Hereinafter, steps S240 to S290 are performed by the short file name determination unit 160 of FIG.

  A short file name is provisionally determined based on the determined long file name (step S240). If the determined long file name is “002_5613_070403.jpg”, the short file name is composed of the character string and serial number of the first part (six characters) and is temporarily determined as “002_56 to 1.JPG”. Although not required, the extension of the long file name is lowercase, while the extension of the short file name is uppercase.

  The temporarily determined short file name is searched for whether it exists in the root directory (step S250). If it exists, the serial number is incremented (step S260), and the short file name “002_56 to 2.JPG” is temporarily determined again (step S240).

  If the tentatively determined short file name does not exist in the root directory, it is further searched whether or not it exists in the subdirectory (step S270). If it exists, the serial number is incremented (step S260), provisionally determined again as a short file name, and step S240 is repeated.

  If the temporarily determined short file name does not exist in either the root directory or the subdirectory, it is determined as a short file name (step S280). In this way, a short file name shorter than the long file name is determined.

  According to the above configuration, the beginning of a long file name can be given distinctiveness by moving a subcategory that is less common and easily fluctuated to the beginning of the file name. This eliminates the need for loop processing such as incrementing the serial number at the beginning of the long file name adopted as the short file name when determining the short file name. Therefore, the effect that the processing time for determining the short file name is shortened can be obtained.

  As shown in FIG. 2, finally, the long file name converted in the long file name preliminary conversion step S210 and the long file name determined in the long file name determination step S230 and the short file name determined in the short file name determination step S280 are associated. Then, a file name storing step (step S290) is performed.

  These long file names and short file names are stored in the recording device 120 of FIG.

  When a saved file is to be searched, the short file name includes only “hour” and “minute”, so that it is difficult to search.

  In addition, it is difficult to search when the long file name prepared by the application software is a file name that does not particularly make sense. Although the present embodiment uses a digital camera, the present invention can also be applied to a file name saved by a word processor or spreadsheet software. At that time, if a file name such as “Document 1” or “book 1” which is not particularly meaningful is given by default, it is difficult to search.

  However, as in this embodiment, not only “hour” and “minute” but also “year”, “month” and “day”, that is, long file names composed of all categories representing the file creation time can be saved. File search is easy.

  In addition, since the short file name is composed of a partial character string and serial number at the beginning of the long file name after the preliminary conversion, it is possible to store the corresponding ones whose correspondences are obvious at a glance.

  On the other hand, long file names in which character strings are arranged from the upper category to the lower category before conversion are considered to be familiar to the user in many senses, and it is easier to search than those after conversion. There are advantages. From the above viewpoint, the long file name before conversion may be stored as a search target.

  Even when the long file name before conversion is stored in the recording device 120, the correspondence between the long file name and the short file name is clear. This is because the short file name is created by using a part of the long file name.

(File name conversion result)
FIG. 3 shows a file name conversion result according to the present embodiment shown in FIGS. FIG. 3A shows the first conversion result. A file having a long file name that is the basis of conversion is an image file that has been shot a plurality of times during the same “minute” (that is, within one minute).

  In this way, no matter how many images are captured within the same “date and time”, the short file name is different from the beginning, so it is not determined that it is an existing one, and from step S250 or S270. Loop processing / increment (step S260) is not performed. Therefore, the processing time is greatly shortened.

  FIG. 3B shows the second conversion result. A file having a long file name that is the basis of conversion is an image file that has been shot a plurality of times in the same “time” (that is, within one hour).

  With the pre-conversion, the short file names will not match each other no matter how many images are captured within the same “date and time” by setting the order of “hours” and “minutes” of the long file names to “minutes” first. It will be different and will not be judged as existing. Therefore, like the first conversion result, the processing time is greatly shortened.

  FIG. 3C shows the third conversion result. This is an example of converting a long file name that coincides with “minute” in another “hour”. When preliminary conversion is performed according to the conversion rule of the present embodiment, loop processing from step S250 or S270 is performed, the serial number is incremented (step S260), and “˜2” appears in the short file name.

  In this case, it takes time to generate a short file name because the loop processing is performed. However, there are very few cases where such a long file name is accidentally generated and the short file name is duplicated.

  FIG. 3D shows the fourth conversion result. This is an example when the clock of the terminal is not moving. The time is not counted up unless the clock setting data is reset and newly set again, for example, after the terminal erases all memory. It is the conversion result in such a case.

  Since only the number after the tilde of the long file name before conversion is different, it can be said that this embodiment is particularly effective.

(Comparative example)
FIG. 4 is a flowchart showing the operation of the file name conversion method as a comparative example. The comparative example is different in that the preliminary conversion (step S210) in FIG. 2 is not performed.

  FIG. 5 is a diagram showing a conversion result obtained by applying the long file name shown in FIG. 3A to the comparative example of FIG. Since the preliminary conversion is not performed in the comparative example, the first half of the long file names of the files created on the same “day” are common. Accordingly, as the number of files created on the same “day” increases, the number of times that the loop processing from step S250 or step S270, that is, whether or not the temporarily determined short file name is not existing, increases, and the operation becomes slower. Become the root cause.

  In the comparative example, when a long file name similar to the first to fourth conversion results described above is converted into a short file name, loop processing is required in all cases, and a serial number “˜2” appears. .

  In this embodiment, these problems are avoided, the number of iteration loops is greatly reduced, and the generation time of the short file name is shortened. Moreover, the correspondence between the long file name and the short file name is also clear because the notation order is changed.

(Experimental result)
Experimental data is shown below.

  Nine consecutive shots were taken with no date set, and all 50 were saved. As a result after performing this, 450 photo data files are generated.

(Processing time of comparative example)
If the long file name was not pre-converted based on the comparative example, the time taken to save all cases was as follows.
15th time 10 seconds 30th time 114 seconds 40th time 198 seconds 50th time 310 seconds As described above, as the number of files increases, the time required for storage becomes longer, and for the 50th time, it takes 310 seconds.

(Processing time of the embodiment)
When preliminary conversion of long file names was performed based on this embodiment, the time taken to store all cases was as follows.
15th time 4.2 seconds 30th time 4.7 seconds 40th time 5.3 seconds 50th time 5.9 seconds In this way, even if the number of files increases, the increase in time required for storage is slight, and the 50th time Even at the time of storage, it was completed in 5.9 seconds. This is because, since the long file name itself is preliminarily converted and is different in the first half, the serial number of the short file name does not increase and the search for the temporarily determined short file name becomes faster.

(File name conversion program, recording medium)
In the above embodiment, the recording device 120 includes the long file name temporary determination unit 150 and the short file name determination unit 160 in advance. However, the application program configured by these is a single file name conversion program. Applicable to any software. That is, it can be incorporated into any software by a recording medium on which a file conversion program is recorded.

  Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention is applicable to a file name conversion method and apparatus for converting a long file name into a short file name, a file name conversion program, and a recording medium on which such a program is recorded.

It is a block diagram which shows the portable information terminal which is embodiment of the file name conversion apparatus of this invention. It is a flowchart which shows operation | movement of the application program which is embodiment of the file name conversion method of this invention performed by the portable information terminal of FIG. It is a figure which shows the file name conversion result by this embodiment shown in FIG. 1 and FIG. It is a flowchart which shows operation | movement of the file name conversion method as a comparative example. FIG. 5 is a diagram illustrating a conversion result obtained by applying the long file name of FIG. 3A to the comparative example of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Personal digital assistant 110 Digital camera 120 Recording device 130 Date time unit 140 Control part 150 Long file name temporary determination part 152 Long file name conversion part 160 Short file name determination part 170 File allocation table (FAT)

Claims (8)

Computer
And long file name provisional determination step of temporarily determined from the top of the category on the file creation date and time of a lower category, the long file name that was sequentially arranged a string representing each category,
The long filenames provisionally determined, from the lower category to a higher category, and long filenames preliminary conversion step of converting the long filename are sequentially arranged a string that represents each category,
A file name conversion comprising: executing a short file name determination step of determining a short file name shorter than the long file name, which is composed of a character string and a serial number at the beginning of the converted long file name Method.   2. The file name conversion method according to claim 1, wherein the long file name determined in the temporary long file name determination step is configured by each category indicating a file creation time point. Long filenames converted by the long filenames preliminary conversion step, and, according to claim 1, further comprising a file name storing step for storing the short file name determined in the short filename determining step so as to correspond or 2. The file name conversion method according to 2. And long file name provisional determination means for temporarily determined from the top of the category on the file creation date and time of a lower category, the long file name that was sequentially arranged a string representing each category,
Long filenames that the temporarily determined, from the lower category to a higher category, and long filenames preliminary conversion unit that converts the long file name are sequentially arranged a string representing the respective categories,
A file name conversion device comprising: a short file name determining unit configured to determine a short file name shorter than the long file name, which includes a character string and a serial number at the beginning of the converted long file name. . 5. The file name conversion apparatus according to claim 4 , wherein the long file name determined by the long file name provisional determination means is configured by each category representing a file creation time point. Long filenames converted by the long filenames preliminary conversion means, and, according to claim 4 or characterized in that it further includes a file name storing means for storing in correspondence a short file name determined in the short filename determining means 5. The file name conversion device according to 5. On the computer,
And long file name provisional determination step of temporarily determined from the top of the category on the file creation date and time of a lower category, the long file name that was sequentially arranged a string representing each category,
The long filenames provisionally determined, from the lower category to a higher category, and long filenames preliminary conversion step of converting the long filename are sequentially arranged a string that represents each category,
A file name conversion comprising: executing a short file name determination step of determining a short file name shorter than the long file name, which is composed of a character string and a serial number at the beginning of the converted long file name program. On the computer,
And long file name provisional determination step of temporarily determined from the top of the category on the file creation date and time of a lower category, the long file name that was sequentially arranged a string representing each category,
The long filenames provisionally determined, from the lower category to a higher category, and long filenames preliminary conversion step of converting the long filename are sequentially arranged a string that represents each category,
Recording a file name conversion program for executing a short file name determining step for determining a short file name shorter than the long file name, which is composed of a character string and a serial number at the beginning of the converted long file name. A recording medium characterized by the above.

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