JPH0676035A - Picture data processing system - Google Patents

Abstract

PURPOSE:To improve a work efficiency and precision by displaying vectorized data and its original image data one over the other in different colors and interactively correcting one or both of them in accordance with an inputted command. CONSTITUTION:This system is provided with a vectorizing processing part 1, a CPU 2, an image scanner 3, a data memory 4, a work RAM 5, a VRAM 6, a data memory 7, a display control part 8, picture memories 9a and 9b formed in the VRAM 6, an input interface part 10, a system bus 11, a CRT 12, a keyboard 13, and a mouse 14. Picture data of a design drawing or a map is read as image data consisting of a two-dimensional array of picture elements by the image scanner 3 or the like, and this image data is converted to vectorized data. This vectorized data and image data are displayed one over the other in different colors, and one or both of display data are corrected to effectively correct a defective part of the read picture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image data processing system.

[0002]

2. Description of the Related Art Image data drawn as a drawing such as a design drawing or a map is read as image data consisting of a two-dimensional array of white pixels and black pixels, which is processed to draw a basic figure such as a line segment or an arc. There is known an image data processing system that creates CAD data and compresses the amount of data for storage by converting it into vectorized data including a drawing command group. Then, in such an image data processing system, the vectorized data and the original image data before the vectorization processing are superimposed and displayed under different coloring, so that the defective portion of the vectorization processing can be easily visually confirmed. A technique for making it possible is disclosed in JP-A-61-165183.

[0003]

However, in the above-mentioned conventional drawing data processing system, although it is possible to inspect whether the vectorization processing is good or bad, a function of interactively correcting the found defective portion of the vectorization data on the spot. Since it is not equipped with, there is a problem that it takes time to correct the defective portion.

Further, recently, with the improvement of the accuracy of the vectorization processing, the processing failure is often caused by the failure of the original image data. However, since the conventional processing system does not have a function of correcting the defective portion of the original image data, there is a problem that the same defectiveness occurs even if the vectorization process is performed again. The present invention has been made in order to solve the above-mentioned problems of the conventional art, and an object of the present invention is to provide an image data processing system capable of correcting a defective portion of image data.

[0005]

The image data processing system of the present invention comprises a reading means for reading the image data as image data consisting of a two-dimensional array of pixels, and the image data read by the reading means into vectorized data. Vectorizing processing means for converting, vectorized data converted by the vectorizing processing means, and original image data read by the reading means and before being converted into vectorized data by the vectoring processing means in different colors. Display means for superimposing and displaying, and correction means for correcting one or both of the vectorized data and the original image data displayed on the display means in accordance with an input command are provided.

[0006]

The present invention operates as follows with the above configuration. First, image data such as a design drawing and a map is read as image data including a two-dimensional array of pixels by a reading means such as an image scanner. The image data read by the reading means is converted into vectorized data by the vectorization processing means. The vectorized data and the image data are superimposed and displayed in different colors by the display means. The defective portion of the read image is effectively corrected by correcting one or both of the both display data by the correction means.

[0007]

FIG. 1 is a block diagram showing the configuration of a drawing data processing system according to an embodiment of the present invention. 1 is a vectorization processing unit, 2 is a CPU (correction / editing unit), 3 is an image scanner, 4 is a data memory, 5 is a work RAM, 6 is a VRAM, 7 is a data memory, 8 is a display controller, 9a,
9b is a screen memory formed in the VRAM 6, 10 is an input interface unit, 11 is a system bus, and 12 is C.
RT, 13 is a keyboard, and 14 is a mouse.

First, image data drawn as a drawing such as a design drawing or a map is read by the image scanner 3 as image data composed of a two-dimensional array of white pixels and black pixels. The read image data is transferred to the data memory 7 via the vectorization processing unit 1 and temporarily stored therein. The image data stored in the data memory 7 is converted into a file by the vector processing unit 1 in accordance with a command from the keyboard 13 if necessary.
It is stored in the data memory 4 as a file.

In order to perform vectorization processing on the image data existing in the data memory 7, the keyboard 13 is used.
A command for instructing the vectorization process is input from and the vectorization processing unit 1 is activated. The started vectorization processing unit 1 reads the image data from the data memory 7,
First, pre-processing for converting into image data having a predetermined line width is executed. This pre-processing is the thinning of the run length data from the outside to the specified line width, the contour line extraction process that connects the end points of the run length data, and the intermediate between the two parallel contour lines extracted by this. Is performed in combination with the skeletonizing process for generating the center line having the line width specified in.

A final process for vectorization is performed on the image data having a predetermined line width created by the pre-process. In this final processing, line segment recognition is performed based on the determination of whether or not a point group having connectivity exists on a straight line, and based on the determination of whether or not the recognized line segment group has connectivity. The polygonal line is recognized, and the circular arc is recognized based on the determination as to whether or not the recognized polygonal line exists on a specific circumference. By this final processing, the image data of a predetermined line width is converted into vectorized data including a drawing code (or drawing command) group of basic figures such as line segments and arcs. This drawing code (command) is a line segment,
It is the identification code (drawing command) of the line segment and the coordinates of the end points, and if it is an arc, it is composed of the identification code (drawing command) of the arc and the coordinates of three points on the arc including the end points.

In parallel with the vectorization of the image data,
Character data such as dimensions and place names included in the image data is separated from the image data by feature extraction and character recognition by pattern matching, and then coded by a combination of position coordinates and character codes.

The vectorized data including the coded data created as described above is stored in the data memory 4 as a vectorized data file having a file name designated by the input from the keyboard 13.

When it is confirmed whether or not the vectorization processing for the image data is correctly performed and correction is made as necessary, a command for instructing the start of the confirmation and correction processing from the keyboard 13 and the vectorization of the processing target. The processing by the CPU 2 is started by inputting the data and the file name of the original image data.

The CPU 2 which has started the processing reads out the vectorized data of the designated file name from the data memory 4 and expands it on the work RAM 5, and successively executes the drawing command group forming the vectorized data. Are converted into corresponding image data by, and the image data is subjected to a predetermined coloring designated through the keyboard 13 and V
Write to the screen memory 9a in the RAM 6. When the processing of the vectorized data is completed, the CPU 2 reads out the image data from the data memory 7 via the vector processing unit 1 and expands it on the work RAM 5, and if the image data is compressed, the necessary expansion is performed. By applying it, it is converted into corresponding image data, and this image data is given a predetermined coloring designated through the keyboard 13 and V
Write to the screen memory 9b in the RAM 6. The CPU 2 instructs the display controller 8 to superimpose / display the image data on the image memories 9a and 9b before and after writing the image data to the screen memory 9a and the image data to the image memory 9b. The display control unit 8 that has received the command sequentially reads the screen data on the screen memory 9a and the image data on the screen memory 9b at a predetermined cycle, superimposes them by the operation of additive color mixing, and supplies them to the CRT 12.

FIG. 2 shows how the vector image 31 in which the image data is displayed on the CRT 12 and the image image 32 in which the image data is displayed on the CRT 12 are displayed in a superimposed manner together with the appearance of the defective portion (defect). It is an example. (A) is an unnecessary line segment (a, b) due to the protrusion 33 added to the image image 32 due to dirt or dust.
(B) is an example in which a necessary line segment (e, f) is missing due to a break 34 generated in the image 32 due to ink fading or the like. in this way,
By superimposing and displaying the image images on each other, it is possible to make a more accurate judgment as to whether or not the defect is caused and to associate it with the cause of the defect, and it is also possible to immediately make an interactive correction.

That is, a correction command for deleting a line segment or a new drawing is input from the keyboard 13 and the correction portion is designated by the mouse 14, so that the correction can be performed on the spot. In the example of FIG. 2A, a command for deleting the line segment (a, b) is input from the keyboard 13, and in the example of FIG. 2B, the command for newly drawing the line segment (e, f) is the keyboard. It is thrown in from 13. Also,
The dimensions in the blueprints and the place names in the map are converted to character codes during vectorization processing, and the dot patterns generated by the character generator are displayed during correction / editing. Mouse 1
It is corrected by inputting the correct character code from the keyboard 12 designated by No. 4.

As illustrated in FIG. 2, defects in vectorized data often occur due to defects in image data. Therefore, if the defect in the image data is not corrected, the same defect will occur in the vectorized data to be converted every time. The image data processing system of this embodiment also has a function of correcting image data including such defects.

The correction process of the image data is shown in FIG.
An example of deleting the projection 33 from the image data 32 illustrated in FIG. 3A will be described with reference to FIG. However, in FIG. 3, the vector image (3
The display of 1) is omitted. First, as shown in FIG. 3 (A), two points α and β are specified using the mouse 14, and then a deletion command is input from the keyboard 13 to specify the protrusion 33 as a deletion target. Receiving this command, the CPU 2 overwrites the line segment (α, β) on the protrusion 33 with different coloring in order to make the user confirm the deletion target. When the user who confirms the line segment (α, β) inputs an execution command, the CPU 2 sets an area γ having a predetermined size including the line segment (α, β) and the original image existing in this area. Delete all data. Next, CPU2
Is all vectorized data existing in the region γ by referring to the vectorized data being developed on the work RAM 5, in this example, line segments (a, b) and line segments (a, b) shown in FIG. 3B. Get c, d). The CPU 2 regards the line segment (α, β) that is most similar to the line segment (α, β) as the deletion target among all the acquired line segments and discards it (FIG. 3C). Finally,
The CPU 2 excludes the vectorized data that has not been discarded, that is, the line segment (c, d) in this example, from the deletion target by expanding the width to a predetermined thickness and writing it in the area γ of the image data. The restored line segment is restored (FIG. 3 (D)).

[0019]

As described in detail above, the drawing data processing system of the present invention not only superimposes vectorized data and its original image data in different colors but also displays one or both of them. Since the configuration includes the correction unit that interactively executes in accordance with the input command, there is an effect that work efficiency and accuracy are improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a graphic processing system according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram exemplifying a state in which image data 31 after vectorization processing and image data 32 before vector processing are displayed in a superimposed manner together with the appearance of a defective portion to be corrected.

FIG. 3 is a conceptual diagram for explaining a correction process for a defective portion of image data.

[Explanation of symbols]

 1 Vectorization processing unit 2 CPU 3 Image scanner 4, 7 Data memory 6 VRAM 8 Display control unit 12 CRT 13 Keyboard 14 Mouse

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location G06K 9/03 Z 8623-5L

Claims (2)

[Claims] 1. A reading means for reading image data as image data composed of a two-dimensional array of pixels, a vectorization processing means for converting the image data read by the reading means into vectorized data, and this vectorization processing means. Display means for superimposing and displaying the vectorized data converted by the above and the original image data read by the reading means and before being converted into vectorized data by the vectorization processing means in different colors; An image data processing system, comprising: a correction unit that corrects one or both of the displayed vectorized data and original image data according to an input command. 2. An image data reading means for reading image data drawn as a figure as image data composed of a two-dimensional array of pixels, and the read image data is subjected to data compression as necessary and saved as a file. Image data storage means, vectorization processing means for processing the read image data, converting it into vectorized data and storing it as a file, vectorized data being stored as the file, and the original image before the vectorization processing An image data processing system, comprising: superimposing and displaying data in different colors, and modifying / editing one or both according to an input command.