JP2002157573A - Method for correcting inclination of drawing file, filing method and medium for storing its program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drawing file inclination correcting method for correcting the drawing data inclination of a raster data drawing file without a complicated arithmetic processing, etc., and for performing filing, a filing method and a medium for storing its program. SOLUTION: The drawing file consisting of raster data which are generated by reading a drawing, etc., by a picture reader is temporarily converted into vector data, the longest segment in the converted drawing file is detected and adopted as reference, whole vector data are moved, etc., so as to permit one of previously arranged horizontal and vertical segments to be in parallel with the detected longest segment and, then, the inclination is corrected. Then the corrected vector data are converted into raster data again and filed in a prescribed output destination so as to perform the inclination correcting processing and the filing processing of the drawing file which consists of raster data without the complicated inclination detecting processing and a correction arithmetic processing. Then an inclination correcting processing time and a filing processing time of the drawing file are drastically shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of filing a drawing file, and more particularly, to correcting inclinations of a plurality of drawing files including drawing data composed of raster data.
The present invention relates to a drawing file inclination correction method suitable for performing continuous filing, a filing method, and a medium storing the program.

[0002]

2. Description of the Related Art Conventionally, for example, a conventional paper drawing such as a map or a design drawing is read by an image reading device such as a scanner, and a drawing file including drawing data converted into raster data is created and appropriately edited. A filing apparatus that stores raster data as a database in a storage medium such as a hard disk device is known.

In general, as an image reading apparatus used in such a filing apparatus, a method of reading a document by manually placing a paper drawing or the like on a document table and an automatic document feeding apparatus (auto document feeding apparatus) feeder:
A method of continuously and automatically reading a document using ADF) is known. In any of these reading methods,
If the document to be read is tilted with respect to the reading direction of the image reading device, the drawing data of the drawing file created in the filing device will also be tilted. Therefore, various methods for correcting the tilt have been proposed. I have.

For example, as in an image reading apparatus disclosed in Japanese Patent Application Laid-Open No. H11-252351, a plurality of edges of a read original are detected, and the inclination of the original is calculated based on these edges. A method for correcting the inclination of a document based on the document is known.

[0005]

However, for example, when a large number of originals are read by the ADF and filing is performed, if a complicated inclination detection process and a tilt correction process involving a correction operation process are performed as in the above-described image reading apparatus, In addition, the filing processing time is greatly increased, and it is difficult to perform quick filing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a method for correcting the inclination of a drawing data of a raster data drawing file and filing without complicated arithmetic processing. , A filing method and a medium storing the program.

[0007]

According to the present invention, there is provided a method for correcting the inclination of a drawing file, comprising the steps of converting drawing data consisting of raster data into vector data; Detecting the longest straight line segment within a predetermined angle range with respect to the vertical or horizontal direction, and using the straight line segment detected in this step as a reference, the line segment is previously constructed in a data processing area in a memory. Moving the entire vector data so that one of the horizontal and vertical line segments and the straight line segment are parallel to each other, and performing a tilt correction process; Converting the data into drawing data.

[0008] A method for filing a drawing file according to the present invention includes a step of taking in a drawing file containing drawing data composed of raster data, a step of storing the drawing file taken in in this step, and a step of storing the drawing file. Reading the drawing file selected by the operator from the drawing files into the memory, converting the drawing data of the drawing file read into the memory in this step into vector data, and converting the vector data in this step Detecting the longest straight line segment within a predetermined angle range with respect to the vertical or horizontal direction, of the straight line segments, and based on the straight line segment detected in this step, One of the horizontal and vertical line segments constructed in the data processing area Moving the entire vector data so that the straight line segments are parallel to each other, and performing a tilt correction process; converting the vector data whose tilt has been corrected in this step into raster drawing data; Outputting the drawing file including the converted drawing data to a preset output destination and storing the drawing file.

Preferably, the step of converting the drawing data composed of raster data into vector data is a step of converting only raster data in a predetermined range of the drawing data into vector data.

The predetermined range is preferably an outer peripheral range of the drawing data.

[0011] A medium according to the present invention includes a process for loading a drawing file including drawing data consisting of raster data;
A process of storing the drawing file captured in this process; and, among the drawing files stored in the process,
A process of reading the drawing file selected by the operator into the memory, a process of converting drawing data of the drawing file read into the memory by this process into vector data,
Of the straight line segments of the vector data converted by this process,
A process of detecting the longest straight line segment within a predetermined angle range with respect to the vertical or horizontal direction, and, based on the straight line segment detected in this process, being pre-established in a data processing area in the memory A process of correcting the inclination by moving the entire vector data so that one of the horizontal and vertical line segments and the straight line segment are parallel to each other; Storing a drawing file filing processing program comprising: a process of converting data into drawing data; and a process of outputting and saving the drawing file including the drawing data converted by this process to a preset output destination. Become.

According to the present invention, drawing data consisting of raster data created by reading a drawing or the like by an image reading device is temporarily converted into vector data, and the linear or linear segments of the converted vector data are used in the vertical or horizontal direction. , A longest straight line segment within a predetermined angle range (hereinafter, referred to as a “longest line segment”) is detected and used as a reference, and any one of the horizontal and vertical line segments previously constructed in the memory is used. For correcting the tilt of a drawing file by moving the entire vector data so that the and the longest line are parallel, and converting the corrected vector data to raster data again and filing it to a predetermined output destination Filing method. Therefore, filing can be performed while performing the inclination correction processing of the drawing data (drawing file) composed of raster data without complicated inclination detection processing and correction calculation processing. As a result, it becomes possible to greatly reduce the time required for the inclination correction processing and the filing processing of the drawing file.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a functional block diagram showing a part of a basic configuration of a filing apparatus for realizing a drawing file inclination correcting method and a filing method according to an embodiment of the present invention.

This filing apparatus is mainly for input devices such as a mouse and a keyboard as character / coordinate input means, an input interface for inputting drawing files from other systems and the like, and for reading drawings such as maps and design drawings. Input unit 1 composed of a scanner or OCR device
A data processing unit 2 including a CPU, a ROM, predetermined application software, etc., a file storage unit 3 including a storage medium such as a hard disk device for storing drawing files, and a color CR for displaying drawing data.
A display unit 4 comprising a display device such as a T display device or a color liquid crystal display device, and a memory 5 such as a RAM for providing a data processing area for arithmetic processing of drawing data and a temporary storage area for drawing data. Have been.

The data processing section 2 includes a raster data processing section 6, a vector data processing section 7, a file processing section 8, and a display control section 9. The raster data processing unit 6 is mainly responsible for processing drawing data composed of raster data in the drawing file temporarily stored in the memory 5. On the other hand, the vector data processing unit 7 is responsible for processing drawing data composed of vector data in the drawing file temporarily stored in the memory 5. This vector data processing unit 7
Is responsible for processing vector data converted from raster data in the editing process such as new creation and movement of drawing data, vector data added by a CAD system, and the like. A raster data format is adopted as the output data format to the printer.

The file processing unit 8 writes and saves a drawing file composed of the drawing data processed by the raster data processing unit 6 and the vector data processing unit 7 in the file storage unit 3 as a drawing file in a raster data format. It is in charge of file access processing for performing so-called filing, such as reading out a drawing file stored in the file storage unit 3 in order to read the drawing file into the memory 5. The display control unit 9 executes control for displaying drawing data on the memory 5 and various information necessary for the operation on the display unit 4 based on the operation of the input unit 1. A program for realizing the function of each block of the data processing unit 2 is, for example, a CD.
-Provided on a suitable medium such as ROM, DVD-ROM and MO.

FIG. 2 is a block diagram showing a basic configuration of the inclination correction processing unit 10 in the file processing unit 8. The drawing file output from the raster data processing unit 6, the vector data processing unit 7, or the memory 5 is usually input to the file processing unit 8 and output to the file storage unit 3 as a raster data format drawing file. If you choose to perform tilt correction during the filing process,
The instruction is transmitted from the input unit 1 to the file processing unit 8, and the inclination correction processing unit 10 in the file processing unit 8 executes the inclination correction processing. That is, in the inclination correction processing unit 10, first,
The drawing file to be filed selected by the operator among the drawing files input to the file processing unit 8 is input to the raster / vector conversion unit 11. The drawing file input to the raster / vector conversion unit 11 is converted into a drawing file in a vector data format, and is output to the longest line segment detection unit 12. In the longest line segment detection unit 12, among the straight line segments composed of the vector data of the input drawing file,
A straight line segment forming the longest straight line within a predetermined angle range with respect to the horizontal or vertical direction is detected for each drawing file. In addition, at the time of detection of the most straight line component, for example,
Only a straight line segment having an inclination within ± 5 ° with respect to the horizontal and vertical reference lines constructed and set in the memory 5 in advance is detected, or the detection target range is set within a predetermined range from a predetermined position in the drawing file. The speed of the detection process can be increased by limiting the number of the detection processes.

The drawing file containing the straight line segment detected by the longest line segment detection unit 12 is then input to the inclination detection unit 13 to detect the angle of inclination with respect to the horizontal and vertical reference lines. You. Regarding the detection of the tilt, a generally known calculation process of the tilt detection is performed by a CPU (not shown) of the filing apparatus. Based on the inclination detected by the inclination detection unit 13, the inclination correction unit 14 rotates and translates the drawing data of the entire drawing file by a known inclination correction method such as affine transformation, and executes the correction of the inclination of the drawing file. Is done. The drawing file whose inclination has been corrected by the inclination correction unit 14 is stored in the vector / raster conversion unit 1.
5 and converted from the drawing file in the vector data format into the drawing file in the raster data format again, and then transferred from the file processing unit 8 to, for example, a predetermined directory of the file storage unit 3 as a preset output destination. Output and filed.

Next, the filing process by the file processing unit 8 will be described in detail. FIG. 3 is a flowchart of the filing process of the file processing unit 8.
First, the file processing unit 8 selects an input file to be filed in accordance with an instruction from the input unit 1 (S
1) The selected input file is read from the memory 5, the raster data processing unit 6, the vector data processing unit 7, or the file storage unit 3 (S2). When the operator selects not to perform the inclination correction process on the read drawing file (S3), the file processing unit 8 transfers the read drawing file to, for example, a predetermined output destination directory of the file storage unit 3. The output is performed (S7), and it is determined whether the reading of the input file is completed (S8). If the reading of the input file has been completed, the filing process is completed, but if the reading of the input file has not been completed, the process returns to step S2 and the sequentially selected input files are read.

On the other hand, if the operator selects to perform the skew correction processing on the read drawing file in step S3, the drawing file is stored in the skew correction processing unit in the file processing unit 8 as described above. The raster / vector conversion unit 11 converts the drawing file in the raster data format into a drawing file in the vector data format (S4). The converted drawing file is within a predetermined angle range, for example, ±, with respect to the horizontal and vertical reference lines constructed in the work area in the memory 5 by the longest line segment detection unit 12.
A line segment constituting the longest straight line within the range of 5 ° is detected (S5), and an inclination between the longest line segment and the horizontal / vertical reference line is detected. Is moved so as to be parallel to the horizontal and vertical reference lines by the detected inclination, and inclination correction is performed (S6). The drawing file subjected to the inclination correction is output to, for example, a predetermined output destination directory of the file storage unit 3 for filing in the same manner as described above (S7). Thereafter, the file processing unit 8 determines whether or not the input file has been read (S8). If the reading has been completed, the filing process is also completed. If the reading has not been completed, the input selected from step S2. File reading is resumed sequentially to perform filing processing.

Next, the filing operation involving the inclination correction processing in the filing apparatus described above will be described. In this filing apparatus, select the item “raster batch processing” from the “file” menu on the operation screen displayed on the display screen of the display unit 4, or select “program” from the “start” menu in the “task bar”. ", A setting dialog 16 for" raster data editing batch processing "is displayed as shown in FIG.
In order to perform the filing process, first, the registration button 18 in the file designation box 17 in the setting dialog 16 is clicked using the mouse of the input unit 1 or the like.
As shown in FIG. 5A, an open dialog 19 is displayed. The operator can select the input target file displayed on the display window 20 of the open dialog 19 as desired, and can confirm the selection by clicking the open button 21 after the selection.
On the other hand, a directory name is directly input to the output destination input area 22 in the file designation box 17 by a key or the like of the keyboard of the input unit 1 or the reference button 23 is clicked, and a directory selection dialog as shown in FIG. Directory display window 2 after displaying 24
It is also possible to select and specify the output destination of the drawing file by specifying the predetermined directory displayed in 5.

When the setting in the file designation box 17 is completed, a check mark is added to the inclination correction check box 27 in the edit setting box 26 with a mouse or the like to select filing with inclination correction processing. I do. When this selection is made by the operator, a signal for performing the inclination correction processing is transmitted to the file processing section 8, and the inclination correction processing section 10 in the file processing section 8 is put on standby as described above. After selecting each item in this manner, by clicking the conversion button 28 of the setting dialog 16, the selected input target file is corrected in inclination to the selected output destination directory and filed. This filing process is performed at high speed because it does not involve complicated arithmetic processing related to tilt correction. Even when multiple input target files are selected, the tilt of each drawing file is corrected by a single setting operation. Since the drawing file can be filed, it is possible to greatly reduce the time for filing the drawing file. In addition, the inclination correction processing accompanying the filing processing is as briefly shown in FIG.

That is, for example, in a filing apparatus,
When the reading area of the image reading apparatus is handled as it is as the drawing file 30, the original 31 of the drawing data read while being tilted in the image reading apparatus is conceptually tilted in the drawing file 30 as shown in FIG. Will be. Therefore, the entire drawing file 30 is converted into vector data, and the longest line segment of the document 31 which is closest to a predetermined condition (angle range, line segment length, etc.) is detected, and is shown in FIG. As shown in FIG.
1 is rotated and moved so as to be parallel to the horizontal and vertical reference lines (in this case, outer frame lines) A to D of the drawing file 30 to correct the inclination of the original 31 in the drawing file 30; As shown in FIG.
By converting 0 into raster data again, it is possible to perform filing processing with inclination correction that does not involve complicated arithmetic processing. For example, as shown in FIG. 7, the inclination correction process is performed on the longest line segment T within ± 5 ° between the horizontal and vertical reference lines A to D among the straight line segments R to V in the document 31. , The longest line segment T and the horizontal and vertical reference lines A to
D (in this case, C ′ or D ′) is calculated by calculation, and the document 31 is simply rotated / moved based on the calculated tilt, which is complicated as in the conventional tilt correction processing. Even if the arithmetic processing is not required and the amount of drawing files to be processed increases, the inclination can be corrected at high speed.

In the inclination correction processing accompanying the filing processing described above, the data of the drawing file 30 to be converted into vector data is converted based on the empirical fact that, for example, a straight line segment of the document 31 is near the outer frame of the document 31. The amount is only 10-20% from the outer frame of the drawing file 30. Alternatively, if the outer frame exchange area is determined to be selectable by the operator in the up / down / left / right direction, and the longest line segment is detected in the converted data, the filing processing with the inclination correction processing can be further speeded up. Becomes possible.

[0025]

As described above, according to the present invention,
Drawing data consisting of raster data created by reading drawings etc. with an image reading device is temporarily converted to vector data,
Among the straight line segments of the converted vector data, the longest straight line segment within a predetermined angle range with respect to the vertical or horizontal direction is detected and used as a reference, and any of the horizontal and vertical line segments previously constructed in the memory is used. A method of correcting the inclination of a drawing file in which the entire vector data is moved so that one of the line segments and the longest line segment are parallel to each other, and a method of correcting the inclination of a drawing file. A filing method for filing to an output destination is realized. Therefore, filing can be performed while performing the inclination correction processing of the drawing data (drawing file) composed of raster data without complicated inclination detection processing and correction calculation processing. As a result, it is possible to greatly reduce the time required for the inclination correction processing and the filing processing of the drawing file.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a part of a basic configuration of a filing apparatus for realizing a drawing file inclination correction method and a filing method according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a basic configuration of a tilt correction processing unit in a file processing unit of the filing apparatus.

FIG. 3 is a flowchart of a filing process of the file processing unit.

FIG. 4 is a diagram showing a setting dialog of a raster data editing batch process displayed on a display screen of a display unit.

FIG. 5 is a diagram showing a dialog box for opening the process.

FIG. 6 is a diagram for simply explaining a tilt correction process accompanying the filing process.

FIG. 7 is a diagram illustrating an example of the inclination correction processing.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Input part, 2 ... Data processing part, 3 ... File storage part,
4 display unit, 5 memory, 6 raster data processing unit, 7
... Vector data processing unit, 8 file processing unit, 9 display control unit, 10 inclination correction processing unit, 11 raster / vector conversion unit, 12 longest line segment detection unit, 13 inclination detection unit, 1
4 ... inclination correction unit, 15 ... vector / raster conversion unit.

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 5B050 BA06 BA17 EA03 EA12 FA02 FA19 5B057 AA13 CA16 CA17 CB16 CB17 CD03 DC08 5C076 AA24 AA40 BA03 BA04 BA06 5L096 BA12 EA23 FA03 FA64 FA67 LA01 MA03

Claims (5)

[Claims] 1. A step of converting drawing data consisting of raster data into vector data, and the longest linear line segment of the vector data converted in this step within a predetermined angle range with respect to the vertical or horizontal direction. A step of detecting a straight line segment; and any one of a horizontal and vertical line segment previously constructed in a data processing area in a memory, based on the straight line segment detected in this step, and the straight line segment. Moving the entire vector data so as to be parallel, and performing a tilt correction process, and converting the vector data corrected in tilt in this step into drawing data of raster data. To correct the inclination of the drawing file. 2. A step of taking in a drawing file including drawing data composed of raster data, a step of storing the drawing file taken in in this step, and a step of selecting the drawing file stored in this step by an operator. Reading the converted drawing file into the memory; converting the drawing data of the drawing file read into the memory into the vector data into the vector data in this step; Detecting the longest straight line segment within a predetermined angle range with respect to the horizontal direction; and using the straight line segment detected in this step as a reference, the horizontal and vertical lines previously constructed in the data processing area in the memory. The vector data so that either one of the line segments is parallel to the straight line segment. Performing a tilt correction process by moving the entirety; converting the vector data corrected in tilt in this step into drawing data of raster data; presetting the drawing file including the drawing data converted in this step And filing the file to a designated output destination and storing the file. 3. The method according to claim 1, wherein the step of converting the drawing data composed of raster data into vector data is a step of converting only raster data in a predetermined range of the drawing data into vector data. How to correct the inclination of the described drawing file. 4. The filing method for a drawing file according to claim 3, wherein the predetermined range is an outer peripheral range of the drawing data. 5. A process for importing a drawing file including drawing data composed of raster data, a process for storing the drawing file acquired in this process, and a process selected by an operator from the drawing files stored in this process. Reading the converted drawing file into the memory; converting the drawing data of the drawing file read into the memory into the vector data into the vector data; and processing the linear segments of the vector data converted by the processing.
A process of detecting the longest straight line segment within a predetermined angle range with respect to the vertical or horizontal direction; and, based on the straight line segment detected in this process, is constructed in advance in a data processing area in the memory. Processing for correcting the inclination by moving the entire vector data so that one of the horizontal and vertical line segments and the straight line segment are parallel to each other; Storing a drawing file filing processing program comprising: a process of converting data into drawing data; and a process of outputting and saving the drawing file including the drawing data converted by this process to a preset output destination. Medium.