JP2965030B1 - Scroll display system and recording medium recording scroll display program - Google Patents

Abstract

The present invention relates to a scroll display system for scrolling a map image and the like and a recording medium storing a scroll display program, and aims to realize high-speed scrolling over a wide range such as the entire map image. And An image recording unit for individually recording data of a partial image obtained by subdividing an entire image in the form of an image file,
A memory buffer capable of temporarily recording image data larger than the display area, a scroll instruction given from the outside, a plurality of partial images distributed in the extension direction of the scroll instruction are selected, and an image file of the selected partial image is selected. An image reading unit that reads from the recording unit, a buffer updating unit that updates the image data in the memory buffer using the image file read by the image reading unit, and an image data in the display area that is extracted from the memory buffer. And an image display unit for displaying.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a scroll display system for scroll-displaying a map image and the like, and a recording medium storing a scroll display program.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. Hei 9-138641 discloses a method in which a plurality of image files created by subdividing a map image are prepared in advance on a hard disk, and these subdivided image files are combined. A conventional device (electronic map display device) for displaying an arbitrary portion on a map image has been disclosed.

FIG. 12 is a flowchart showing the operation of this type of conventional apparatus. Hereinafter, the operation of this conventional device will be described along the steps shown in FIG. First, the conventional device reads a plurality of image files corresponding to a desired display area from the hard disk (S1 in FIG. 12). next,
The conventional device performs a conversion operation required for displaying map data on a plurality of read image files (FIG. 12S
2).

The conventional device transfers the map data obtained in this way to the display memory, and fills up the memory area corresponding to the display area (S3 in FIG. 12). The conventional device generates an image signal by reading out the display memory while scanning, and executes screen display (S4 in FIG. 12). Further, in order to prepare for scroll display, the conventional apparatus reads an image file outside the display area from the hard disk (FIG. 12).
S5).

Next, the conventional apparatus performs a conversion operation necessary for displaying map data on the read image file (S6 in FIG. 12). The conventional device transfers the map data thus obtained to the display memory, and fills the memory area corresponding to the virtual area (S7 in FIG. 12). In the above-described conventional device, scrolling of the map image is realized by moving the display area on the virtual area by a range (up, down, left, right, diagonal). In this case, an image signal at the time of scrolling can be immediately generated from a new display area, so that a high-speed scroll operation can be easily realized. Incidentally, the virtual area here is assumed to indicate a video memory for screen display conventionally provided in the image processing board 18 described later.

[0006]

In the above-mentioned conventional device (Japanese Patent Laid-Open No. Hei 9-138641), high-speed scrolling is performed by moving the display area on the virtual area.
The range in which high-speed scrolling is possible is limited to the range of the virtual area. Therefore, the conventional apparatus has a problem that a high-speed scroll operation cannot be realized over a wide range such as the entire map image.

Therefore, in the inventions according to claims 1 to 3,
An object of the present invention is to provide a scroll display system capable of further speeding up a scroll operation.

[0008] According to the invention described in claim 4, the claim
It is an object of the present invention to provide a recording medium that records a program for implementing the system described in any one of 1 to 3 on a computer. Furthermore, in the invention according to claim 5, 6, and an object thereof is to provide a scrolling display system specific forms obtained by adding an object-oriented database.

[0009]

( Common configuration of each claim) A scroll display system common to each claim is a scroll display system for scrolling and displaying an entire image on a screen, and subdivides the entire image. The data of the partial image smaller than the area displayed on the screen
An image recording unit that records individual images in the form of image files, a memory buffer that can temporarily store image data larger than the area displayed on the screen, and an externally supplied scroll instruction, which is distributed in the extension direction of the scroll instruction A plurality of partial images to be selected, an image reading unit that reads an image file of the selected partial images from the image recording unit, and an image file read by the image reading unit.
The image processing apparatus further includes a buffer updating unit that updates image data in the memory buffer, and an image display unit that extracts and displays image data in a display area from the memory buffer.

In the above-described configuration, when an external scroll instruction is given, the image reading unit selects a partial image distributed in the extension direction of the scroll instruction on the entire image. The image reading unit sequentially reads out the image files of the selected partial images from the image recording unit. The buffer updating unit updates the image data developed on the memory buffer using the image file read in this way. The image display unit extracts and displays the image data of the display area from the memory buffer. As described above, in the present invention, by newly providing the image reading unit and the buffer updating unit, the memory buffer is updated to a new state according to the scroll instruction. Therefore, it is possible to realize a scroll operation over a wide range beyond the range of the memory buffer.

By the way, such updating of the memory buffer is executed in accordance with fine scroll movement. Therefore, the update area on the memory buffer is a relatively elongated area such as a strip or a hook. Therefore, when the data amount of the image file is large, an excessive image not related to scrolling is often processed in updating the memory buffer, and it is difficult to speed up the buffer update.

However, in the present invention, the memory buffer is set larger than the screen display area, and the partial image (image file) is set smaller than the screen display area.

As a result, each image file is an image unit smaller than the memory buffer. By flexibly combining such small unit image files, it is possible to efficiently cover a narrow update area on the memory buffer.

Therefore, processing of extra images when updating the memory buffer is reduced, and the "total read time of the image file", the "development time of the image file", and the "rewrite time of the memory buffer" are reliably reduced. It is possible to do.

[0015] For the above reasons, the present invention makes it possible to process the update operation of the memory buffer at a higher speed.
As a result, it is possible to speed up a wide-range scroll operation involving updating the memory buffer.

[0016] (claim 1) scrolling display system according to claim 1, in a common configuration described above, a plurality of image files image recording unit is recording, a recording image file in the same image format, The buffer updating unit diverts the plurality of image files read from the image reading unit by using the compression-related information obtained from at least one image file.

In general, when a plurality of image files are sequentially expanded, it is necessary to read out compression-related information (information such as a scale factor and a quantization table) from a header portion for each image file. However, the claim
In the invention described in Item 1 , since a plurality of image files are recorded in the same image format, it is possible to use the compression-related information of one image file for image expansion of other image files. Therefore, it is possible to omit processing such as reading out the compression-related information for each image file, and it is possible to perform the update operation of the memory buffer at higher speed. As a result, it is possible to perform a wide range scroll operation involving updating the memory buffer at a higher speed.

[0018] (Claim 2) scrolling display system according to claim 2 is the common configuration described above, the image recording section, and a plurality of image files, based on the predetermined coordinate system on the entire image directory (Folders) and are recorded hierarchically.

Generally, it is assumed that the number of partial images will be several hundred to several thousand. When such a large number of image files are stored collectively, position information of a desired image file must be found from a long file management table (so-called FAT), and the access efficiency of the image file is remarkably low. Become. However, according to the second aspect of the present invention, a plurality of image files are classified into directories based on a coordinate system on the entire image.

Therefore, when the image reading unit selects the image file corresponding to the scroll extension direction, it is possible to directly narrow down the parent directory of the desired image file based on the coordinate system on the entire image. . For this reason, it is not necessary to search a long file management table without help, and the access efficiency of the image file can be further improved. Therefore, according to the second aspect of the present invention, it is possible to further speed up the reading process of the image file, and to execute the scrolling operation over a wide range that involves the reading operation of the image file at a higher speed.

( Claim 3 ) The scroll display system according to the third aspect is the second aspect.
In the scroll display system described in 1 above, the coordinate system which is used as a reference when hierarchically recording the image file is the first coordinate system that distinguishes the “scroll course assumed in advance on the entire image”.
And a coordinate system in which the identification code of the image file arranged on each of these courses is the second coordinate component.

Usually, when an operator scrolls a map image or the like, the operator often scrolls along a road, a river, or another course. Therefore, by classifying the image files into directories based on the course as in the invention described in claim 3, the frequency of unnecessary directory movement is reduced, and the file access efficiency can be further improved. Therefore, according to the third aspect of the invention, the reading process of the image file is further speeded up,
A wide-range scroll operation involving an operation of reading an image file can be performed at a higher speed.

[0023] (claim 4) recording medium according to claim 4, the computer, the image recording unit according to any one of claims 1 to claim 3,
A scroll display program for functioning as an image reading unit, a memory buffer, a buffer updating unit, and an image display unit is recorded. By using such a recording medium, the scroll display system according to any one of claims 1 to 3 can be realized on a computer.

( Claim 5 ) The scroll display system according to the fifth aspect is the first aspect of the invention.
4. The scroll display system according to claim 3 , wherein the object includes at least one of moving image information, still image information, audio information, command information, and character information in association with position information on the entire image. And an object execution unit that selects an object from the object-oriented database in response to a position instruction on the screen given from the outside and executes the selected object together with the screen display. It is characterized by the following.

( Claim 6 ) The scroll display system according to claim 6 is the scroll display system according to claim 1.
4. The scroll display system according to claim 3 , wherein the object includes at least one of moving image information, still image information, audio information, command information, and character information in association with position information on the entire image. Corresponding to the object-oriented database that can be registered and the position indication on the screen given from the outside, the following (1),
And a database updating unit that executes at least one of (2) and updates the object-oriented database. (1) a process of selecting a registered object corresponding to the position indication from the object-oriented database and executing any one of editing, updating, and deletion on the selected registered object (2) processing corresponding to the position indication Processing for newly registering an object in the object-oriented database

( 7 ) The scroll display system according to the above (7 ) , wherein
In the general configuration, the image reading unit updates a buffer.
Synchronizes with the scroll instruction regardless of whether
Read the image files distributed in the roll direction first.
It is characterized by starting a line. ( Claim 8 ) The scroll display system according to claim 8 is based on claim 7
The scroll display system according to claim 1, wherein the buffer
The updater does not need to update the buffer.
Image files distributed in the scroll direction in synchronization with the
File decompression processing is started in advance.
You.

[0027]

Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> A first embodiment is an embodiment corresponding to the first to second, fourth , seventh, and eighth aspects of the present invention. FIG. 1 is a diagram illustrating an overall configuration of a scroll display system according to the first embodiment. In FIG. 1, inside the computer 11,
An MPU (microprocessor) 12 is provided. An input device 13 including a keyboard and a mouse, a hard disk 16, a memory 17, and an image processing board 18 are connected to the MPU 12. This image processing board 1
A monitor 19 is connected to the image output terminal 8.

On the other hand, a CD-ROM drive device 20 is connected to the MPU 12. Into the CD-ROM drive device 20, a CD-ROM 21 in which a scroll display program, an image file group, and an installation program thereof are recorded is inserted. This CD-ROM 21
The MPU 12 uses the installation program in
The scroll display program and the image file group in the D-ROM 21 are developed and stored in the hard disk 16, respectively.

(Regarding Image File Group in Hard Disk 16) The storage format of image files in the hard disk 16 will be described below. First, these image file groups are individually created from partial images obtained by subdividing an entire image (here, an image of a large map).

FIG. 2 is a diagram showing the relationship between the whole image and the partial image. As shown in FIG. 2, each of the partial images is an image obtained by dividing the entire image into a lattice shape with a “rewrite width for one buffer update”. These partial images are all compressed and coded in the same image format (the same quantization table) and filed, and then “NN”
XXXXYY. "AAA" is individually assigned.

Note that "NN" in the file name is a code representing a map name. “XXX” is a code indicating the X coordinate component of the partial image on the entire image.
“YYY” is a code representing the Y coordinate component of the partial image on the entire image. “AAA” is a code indicating a file type. FIG. 3 is a diagram showing a state where the hard disk 16 hierarchically records these image file groups.

As shown in FIG. 3, the hard disk 1
6, a directory “NN” corresponding to the map name is provided. Under the directory “NN”, sub-directories “0” corresponding to the X coordinate components of the partial images
00, “001”,... Under these subdirectories, image files are classified and stored for each X coordinate component.

(Correspondence between the Invention and the First Embodiment) Here, the correspondence between the first embodiment having the above configuration and the invention will be described. First, regarding the correspondence between the inventions described in claims 1 and 2 and the first embodiment, the image recording unit corresponds to the hard disk 16, the memory buffer corresponds to a partial area of the memory 17, and the image reading unit Is MPU1
The buffer update unit corresponds to “the function of selecting the image file of the partial image distributed in the extension direction of the scroll instruction and reading the image file from the hard disk 16” of the MPU 12 after “extending the image file of the read image file”. The image display unit corresponds to the “function of transferring image data from the memory buffer to the image processing board 18” of the image processing board 18 and the MPU 12. Further, the invention according to claim 4 and the first aspect
For the correspondence with the embodiment, the recording medium is a CD-ROM.
Corresponds to the ROM 21.

(Operation of First Embodiment) The operation of the first embodiment will be described below. First,
When the scroll display program is started, the MPU 12
Creates a memory buffer as shown in FIG. 4 on the memory 17 after executing a known initialization routine such as window registration.

This memory buffer is a memory area capable of storing partial image data of 5 rows and 6 columns. Note that the data on the memory buffer is a pointer (white circle position in FIG. 4) that can be converted to a real address (black circle position in FIG. 4).
Referenced indirectly through By such a pointer reference, it looks as if the memory buffer (dotted line portion in FIG. 4) having the same contents repeatedly exists in the vertical, horizontal, and oblique directions of the actual memory buffer (solid line portion in FIG. 4). . As a result, a kind of ring buffer is virtually realized.

After completing the mounting of the memory buffer, the MPU 12 sequentially reads the image files of 5 rows and 6 columns from the hard disk 16 for initializing the memory buffer. The read image file is decompressed using the compression-related information (such as scale factor information) in the file header. (Note that the compression-related information at this time is stored in the memory 17 in preparation for later use.) The MPU 12 transfers the image data thus expanded to the memory buffer, and stores the image data in the memory buffer. Initialize the whole area.

After completing the initialization of the memory buffer, the MPU 12 converts the image data of the display area set on the memory buffer (here, the data of the partial image of 3 rows and 4 columns) into the image processing board. 18 at once. The image processing board 18 initially displays an image on the screen of the monitor 19 based on the transfer data. After completing such initial display of the screen, the MPU 12 displays a modeless dialog having buttons arranged in eight directions on a part of the screen, and enters a well-known message loop.

In this state, when the operator operates the input device 13 and presses a button on the modeless dialog, a command message having a scroll direction as a parameter value is generated from the operating system of the computer 11. When the button is continuously pressed, the command message is generated at predetermined time intervals. FIG. 5 shows that the MPU 12 executes in response to the command message.
FIG. 9 is a diagram showing a message processing routine in a scroll display program. FIG. 6 is a diagram showing an operation of a child thread started in the message processing routine and processed by the MPU 12 in parallel.

FIGS. 7 to 9 are diagrams for explaining the updating operation of the memory buffer executed at this time.
Hereinafter, the operation will be described in the order of steps shown in FIG. First,
The MPU 12 determines whether scrolling is impossible (S1 in FIG. 5). If the current display position on the entire image is located at the end in the scroll direction, the MPU 12 determines that scrolling is impossible, and immediately ends the message processing routine.

On the other hand, in other cases, the MPU 12 determines that scrolling is possible, and determines whether or not the child thread for buffer update (FIG. 6) is currently being executed (FIG. 5S).
2). Here, if the child thread is not running, M
The PU 12 shifts the operation to Step S5. On the other hand, if the child thread is currently being executed, the MPU 12 determines whether the scroll direction of the child thread matches the current scroll direction (S3 in FIG. 5).

If the scroll directions of the child threads match, the MPU 12 proceeds to step S6.
Move the operation to. On the other hand, if the scroll direction of the child thread is different, the MPU 12 forcibly terminates the child thread in the different direction (S4 in FIG. 5). After that, MPU12
Newly generates a “buffer update child thread” corresponding to the current scroll direction (S5 in FIG. 5).

The child thread created here is executed in parallel (including time division) with the subsequent operations. Subsequently, the MPU 12 sends a scroll instruction (for example, an API function such as “ScrollWindow”) to the image processing board 18.
give. The image processing board 18 scrolls the display image in the window in the scroll direction in accordance with the scroll command (S6 in FIG. 5).

Following such operations, the MPU 12
The range setting of the display area on the memory buffer is moved by the scroll amount on the screen (S7 in FIG. 5). Where MP
U12 determines whether an update area having the same width as the partial image has been generated on the memory buffer by moving the range of the display area (S8 in FIG. 5). Note that the update area here is a predetermined distance (for example, a predetermined distance of the width of the partial image or a predetermined distance of about half the width of the partial image) from the range of the display area on the memory buffer. Area that is no longer needed for the scroll operation.

If an update area having the same width as that of the partial image has not yet occurred, the MPU 12 shifts the operation to Step S10. On the other hand, as shown in FIGS. 7B to 9B, when an update area having the same width as the partial image is generated, M
The PU 12 gives the data access right to the memory buffer to the child thread (S9 in FIG. 5).

The management of the data access right here is realized by using a well-known exclusion processing routine (for example, a critical section or the like) prepared on the OS side, or switching on / off of a global variable.
By the way, in step S6, if the image processing board 18 can complete all the drawing after the scroll movement alone, no invalid rectangle is generated on the screen. In such a case (NO in S10 in FIG. 5), the MPU 12
The message processing routine ends.

On the other hand, when an invalid rectangle is generated on the screen (YES side of S10 in FIG. 5), a message (for example, a WM_PAINT message) notifying the occurrence of the invalid rectangle is given from the image processing board 18 to the MPU 12. In response to this message, the MPU 12 determines whether the data access right of the memory buffer is owned (S1 in FIG. 5).
1).

If there is no data access right (FIG. 5)
(NO side of S11), MPU 12 determines that the update of the memory buffer in the child thread has not been completed yet,
Wait for the operation until the data access right is returned (of course,
Even while waiting, the buffer update process continues on the child thread side). On the other hand, when the MPU 12 has the data access right (YES in S11 in FIG. 5), the MPU 12 transfers the image data corresponding to the invalid rectangle from the display area on the memory buffer to the image processing board 18 and cancels the invalid rectangle. (S12 in FIG. 5). After eliminating the invalid rectangle in this way, M
The PU 12 ends the message processing routine.

Next, the operation of the above-described child thread will be described with reference to FIG. When the child thread for updating the buffer is generated, the MPU 12 selects the image files of the partial images distributed in the extension direction of the scroll direction on the entire image and sequentially reads the image files from the hard disk 16 (FIG. 6).
S21). The MPU 12 expands the image file read in this way by using the compression-related information once read at the time of initial display of the screen (S2 in FIG. 6).
2).

Here, the MPU 12 determines whether or not the child thread has the data access right to the memory buffer (S23 in FIG. 6). If there is no data access right (NO in S23 in FIG. 6), the MPU 12
Determines that the update area having the same width as the partial image has not yet occurred, and waits for the operation until the data access right is given.

On the other hand, if the user has the data access right (YES side of S23 in FIG. 6), the MPU 12
As shown in (c) to (c) of FIG. 9, image data for which image decompression has been completed is sequentially written into an update area on the memory buffer. As a result, the update of the memory buffer is completed as shown in FIGS. 7D to 9D (S2 in FIG. 6).
4). After completing the update of the memory buffer, the MPU 12
Returns the data access right of the memory buffer from the child thread to the parent thread (FIG. 5). A series of operations as described above are executed each time a command message having a message direction as a parameter value is generated.
Up, down, left, right and diagonal omnidirectional scrolling is realized.

(Effects of First Embodiment, etc.) According to such an operation, in the first embodiment, the memory buffer is formed by combining several partial images (image files) smaller than the image data in the memory buffer. Update efficiently. Therefore, extra work such as processing image data not related to scrolling can be omitted, and a wide range of scrolling operation involving updating of a memory buffer can be executed at high speed.

In particular, in the first embodiment, the partial images are divided in advance by the rewriting width for one buffer update. Therefore, the update area on the memory buffer completely matches the area where the partial images are combined. Therefore, there is no waste in the update operation of the memory buffer, and the scroll operation can be executed at a higher speed.

Further, in the first embodiment, the compression-related information used at the time of initial display of the screen is used for image expansion of other image files. Therefore, it is not necessary to read out the compression-related information from the file header one by one, and the scroll operation can be executed at a higher speed. In the first embodiment, when reading an image file, the parent directory of the image file can be narrowed down directly and quickly using the X coordinate component of the partial image. Therefore, it is not necessary to search for a long file management table, and the scroll operation can be executed at a higher speed.

Further, in the first embodiment, a ring-shaped memory buffer is used in up, down, left, right, and oblique directions. Therefore, when moving the display area in the vertical, horizontal, and diagonal directions, there is no need to perform any processing such as moving blocks of data on the memory buffer. Therefore, it is possible to speed up the scroll operation by that much.

In the first embodiment, regardless of the necessity of updating the buffer, the reading process of the image file distributed in the scroll direction and the image decompression process (S21 to S22 in FIG. 6) are performed in synchronization with the scroll instruction. Start ahead. Therefore, when the scroll instruction is repeated and the memory buffer is updated, the processing of the image file has already progressed to some extent, and the operation of updating the memory buffer can be completed more quickly. Therefore, it is possible to speed up the scroll operation by that much.
Next, another embodiment will be described.

<Second Embodiment> A second embodiment is an embodiment corresponding to the first to fourth aspects of the present invention. The system configuration and operation of the second embodiment are the same as those of the first embodiment (FIGS. 1, 4 to 9).
The description is omitted here. The feature of the second embodiment resides in the storage format of the image file. Hereinafter, the storage format of the image file will be described in detail.

FIG. 10 is a diagram for explaining the relationship between the entire image and the partial images in the second embodiment. As shown in FIG. 10, each of the partial images is divided into a plurality of regions along a course such as a road or a river. These partial images are compressed and encoded into files,
The file name “NNXXYYY.AAA” is individually assigned.

"NN" in the file name is a code representing the map name. “XX” is a course number indicating a distinction between courses on the entire image. “YYY” is a file identification code on the course. "AA
“A” is a code indicating the file type. FIG. 11 is a diagram showing a state where the hard disk 16 hierarchically records these image file groups.

As shown in FIG. 11, the hard disk 16 is provided with a directory "NN" corresponding to the map name. Under the directory "NN",
Sub directories "00" and "0" corresponding to the course numbers
1 "... Are provided. Under these subdirectories, each of the image files is classified and stored for each course.

As described above, in the second embodiment, the image files are divided into directories for each course and recorded hierarchically. Therefore, with respect to the scroll movement along the course, the processing of the directory movement is not required at all, and the access efficiency of the image file can be further improved. As a result, it is possible to further speed up the scroll operation.

In the first and second embodiments, a memory buffer capable of storing partial images of 5 rows and 6 columns is used. However, the present invention is not limited to this. . Furthermore, in the first and second embodiments described above, the system in which the entire image such as the map image is scroll-displayed has been described, but the embodiment is not limited to this. For example, as a more specific system, the object-oriented database and the object execution unit described in claim 5 may be realized by using the MPU 12. By adding these components to the scroll display system, a desired location on the map can be searched by high-speed scrolling, and registered objects (movie, still image, voice, command, text display, etc.) corresponding to mouse clicks, etc. Can be executed freely.

Further, as a more specific system, the object-oriented database and the database updating unit described in claim 6 may be realized by using the MPU 12. By adding such a configuration to the scroll display system, flexible processing such as editing a registered object or registering a new object can be performed in response to a mouse click or the like on the screen.

In the first and second embodiments described above, the size of the partial image is set to be constant, but the present invention is not limited to this. For example, in the case of an image such as a map, a case in which various images from a binary image to a multicolor image are handled is assumed. In such a case, even if the size of the partial image is constant, the data amount of each image file greatly differs due to differences in the number of bits per pixel, the number of colors, and the like. For this reason, the processing time of the file greatly fluctuates depending on the number of colors of the image to be handled or the like, which causes a problem that the scroll speed changes.

When the scroll speed changes frequently in this manner, it becomes difficult for the operator to predict the scroll speed and stop the scroll at a desired position, and the operability of the scroll display system is significantly deteriorated. . Therefore, in such a case, it is preferable to reduce the size of the partial image as the number of bits or the number of colors per pixel increases. By adjusting the size of the partial image, it is possible to suppress a change in the data amount of the image file and to suppress a change in the scroll speed due to a difference in the number of colors or the like as much as possible.

[0066]

In the invention described, according to the present invention (claim 1) according to claim 1, at least one image file compression-related information, to divert the image decompression of other image files. Therefore, the process of reading out the compression-related information for each image file is omitted, and the operation of updating the memory buffer is further accelerated. Therefore, it is possible to execute a wide-range scroll operation involving updating the memory buffer at a higher speed.

[0067] In the invention described in (Claim 2) according to claim 2, when selecting an image file to be distributed to the extending direction of the scroll instruction, based on the coordinate system defined on the entire image, the desired image file The parent directory can be narrowed down directly and quickly. Therefore, the directory search time is shortened, and the access efficiency of the image file can be further improved. As a result, it is possible to execute a scroll operation over a wide range that involves an operation of reading an image file at a higher speed.

( Claim 3 ) In the invention according to claim 3 , the image files are classified into directories based on the course. Therefore, with regard to scroll movement along the course, unnecessary processing such as directory movement is reduced, and the file access efficiency can be further improved. As a result, a wide-range scroll operation involving an image file read operation can be performed at a higher speed.

( Claim 4 ) By using the recording medium according to claim 4 , the scroll display system according to any one of claims 1 to 3 can be realized on a computer. .

( Claim 5 ) In the invention according to claim 5 , since the object-oriented database selects and executes a registered object in response to an external position instruction, a scroll display system excellent in presenting various information is provided. Is realized.

( Claim 6 ) According to the invention of claim 6 , since the object-oriented database updates or newly registers an object in response to an external position instruction, a scroll display excellent in flexible information operation is provided. The system is realized.

( Claims 7 and 8 ) According to the inventions of claims 7 and 8, it is not necessary to update the buffer.
Regardless of the scroll instruction,
Read image files distributed in different directions and expand images
The process (S21 to S22 in FIG. 6) is started in advance. for that reason,
The scroll instruction is repeated and the memory buffer is updated.
When new, image file processing has already progressed to some extent.
Completes the update operation of the memory buffer earlier.
It becomes possible. Therefore, that much sucrose
This makes it possible to speed up the operation.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a scroll display system according to a first embodiment.

FIG. 2 is a diagram illustrating a relationship between an entire image and a partial image.

FIG. 3 is a diagram illustrating hierarchical recording of an image file.

FIG. 4 is a diagram illustrating a memory buffer.

FIG. 5 is a diagram showing a message processing routine.

FIG. 6 is a diagram illustrating a child thread generated in a message processing routine.

FIG. 7 is a diagram illustrating an update operation of a memory buffer.

FIG. 8 is a diagram illustrating an update operation of a memory buffer.

FIG. 9 is a diagram illustrating an operation of updating a memory buffer.

FIG. 10 is a diagram illustrating a relationship between an entire image and a partial image according to the second embodiment.

FIG. 11 is a diagram illustrating hierarchical recording of an image file according to the second embodiment.

FIG. 12 is a diagram showing an operation flowchart of a conventional device.

[Explanation of symbols]

 11 Computer 12 MPU 13 Input Device 16 Hard Disk 17 Memory 18 Image Processing Board 19 Monitor 20 CD-ROM Drive 21 CD-ROM

Claims (8)

(57) [Claims] 1. A scroll display system for scrolling and displaying an entire image on a screen, wherein data of a partial image obtained by subdividing the entire image and making the area smaller than an area displayed on the screen is stored in an image file. An image recording unit for individually recording in a form, a memory buffer capable of temporarily storing image data larger than an area displayed on the screen, and a scroll instruction given from outside, and extending in a direction in which the scroll instruction is extended. An image reading unit that selects a plurality of partial images to be distributed and reads an image file of the selected partial image from the image recording unit; and an image on the memory buffer using the image file read by the image reading unit. A buffer updating unit for updating data; an image for extracting and displaying image data in a display area from the memory buffer. In the scroll display system including a display unit, the plurality of image files recorded by the image recording unit are image files recorded in the same image format, and the buffer update unit acquires from at least one image file. A scroll display system for expanding a plurality of image files read from the image reading unit by utilizing the compression-related information. 2. A scroll display system for scrolling and displaying an entire image on a screen, wherein the partial image obtained by subdividing the entire image and reducing the size of a partial image smaller than an area displayed on the screen is stored in an image file. An image recording unit for individually recording in a form, a memory buffer capable of temporarily storing image data larger than an area displayed on the screen, and a scroll instruction given from outside, and extending in a direction in which the scroll instruction is extended. An image reading unit that selects a plurality of partial images to be distributed and reads an image file of the selected partial image from the image recording unit; and an image on the memory buffer using the image file read by the image reading unit. A buffer updating unit for updating data; an image for extracting and displaying image data in a display area from the memory buffer. A scroll display system including a display unit, wherein the image recording unit classifies the plurality of image files into directories based on a predetermined coordinate system on the entire image, and records the files hierarchically. Characterized scroll display system. 3. The scroll display system according to claim 2, wherein the coordinate system used as a reference when hierarchically recording the image file includes: distinguishing between “a scroll course assumed on the entire image”. A scroll display system as a first coordinate component, wherein the coordinate system uses an identification code of an image file arranged on each of these courses as a second coordinate component. 4. A scroll display program for causing a computer to function as an image recording unit, an image reading unit, a memory buffer, a buffer updating unit, and an image display unit according to any one of claims 1 to 3. A recorded machine-readable recording medium. 5. The scroll display system according to claim 1, wherein moving image information, still image information, voice information, command information, or command information is associated with the position information on the entire image. An object-oriented database in which objects including at least one of the character information are registered, and an object selected from the object-oriented database in response to a position indication on the screen given from the outside, and the selected object is displayed together with the screen display. A scroll display system, comprising: an object execution unit that executes the scroll execution. 6. The scroll display system according to claim 1, wherein moving image information, still image information, audio information, command information, or command information is associated with the position information on the entire image. An object-oriented database in which an object including at least one of character information can be registered; and at least one of the following (1) and (2) corresponding to an externally provided position designation on the screen, A scroll display system comprising: a database updating unit that updates a database. (1) a process of selecting a registered object corresponding to the position indication from the object-oriented database and executing any one of editing, updating, and deletion on the selected registered object (2) processing corresponding to the position indication Processing for newly registering an object in the object-oriented database 7. A scroll display system for scrolling and displaying an entire image on a screen, wherein data of a partial image obtained by subdividing the entire image and making the area smaller than an area displayed on the screen is stored in an image file. An image recording unit for individually recording in a form, a memory buffer capable of temporarily storing image data larger than an area displayed on the screen, and a scroll instruction given from outside, and extending in a direction in which the scroll instruction is extended. An image reading unit that selects a plurality of partial images to be distributed and reads an image file of the selected partial image from the image recording unit; and an image on the memory buffer using the image file read by the image reading unit. A buffer updating unit for updating data; an image for extracting and displaying image data in a display area from the memory buffer. A scroll display system including a display unit, wherein the image reading unit starts reading the image file distributed in the scroll direction in advance in synchronization with the scroll instruction regardless of whether buffer update is necessary or not. And scroll display system. 8. The scroll display system according to claim 7, wherein the buffer update unit performs image expansion processing of an image file distributed in a scroll direction in synchronization with a scroll instruction regardless of whether buffer update is necessary or not. A scroll display system characterized by starting ahead.