JPS6063680A - Filing system for drawing information - Google Patents

Abstract

PURPOSE:To utilize an additional entry type memory such as an optical disk which is usable at present as a storage means for a large amount of data by extracting drawing element selectively. CONSTITUTION:A differentiator 3 performs differential processing between original drawing data stored in the 1st image storage device 2 and one screen of drawing data stored in the 2nd image storage device 4 and stores a frame memory 5 with data after the differential processing. A drawing element extractor 6 extracts drawing elements of a straight line, arc, character, symbol, etc., from the stored data after the differential processing. The extracted drawing elements are stored in the 2nd image storage device 4 in the form of picture element array data. At the same time, a drawing element encoder 7 encodes the data into drawing primitive codes or character and symbol codes. The encoded drawing element data is stored in an encoded data storage device 8.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for creating a drawing information file, and more specifically, a method for efficiently converting a large amount of drawing information into graphic primitive codes, character/symbol codes, etc. for a database. Regarding the method of filing.

[Prior art]

Conventionally, when converting drawing information into a file in a computer,
If the original drawing data is stored in a storage medium as black and white binary pixel array data, all drawing elements such as figures, characters, and symbols are extracted and recognized from the original drawing data through automatic processing using a computer. A method has been adopted in which all drawing information is filed as encoded information. In this case, for figures in the original drawing data, codes are used that contain, for example, the start point, end point coordinates, radius of curvature, etc. of the straight lines, arcs, etc. that form them (hereinafter referred to as figure primitive codes). ), EBC for letters and symbols
Use DIC code. However, it is currently impossible to completely recognize graphic data through automatic processing by a computer, and at least some form of manual assistance is required, such as manual processing using a conversation terminal, and a large amount of drawing information is required. It took a long time to create a file. For this reason,
If you want to provide a specific drawing element to the user at an early stage during file creation, for example, if you have a hand-drawn diagram that includes a mixture of text and straight lines, and you want to first provide only the straight lines as graphic primitive information in a clean format. However, there was a drawback that services could not be provided until all drawing information had been converted into files.

[Purpose of the invention]

The present invention selectively extracts drawing elements such as figures, characters, and symbols from original drawing data stored as pixel array data in a storage medium, and generates graphic primitive codes and characters.
The purpose is to encode and store the drawing information in a symbol code and serve it as quantified data in the code file, while at the same time serving unencoded drawing elements as drawing data in the pixel array data format. In particular, it is an object of the present invention to realize a drawing information filing method that effectively utilizes write-once memory such as optical discs, which are currently available as storage means for storing large amounts of data.

[Summary of the invention]

The present invention extracts predetermined drawing elements from original drawing data stored as pixel array data in an image storage means, encodes and stores these drawing elements as a graphic primitive code or a crossover/symbol code, and at the same time The extracted drawing elements are appropriately cut out and stored as pixel array data in the image storage means for difference processing, and thereafter, the original drawing data stored in one image storage means and the pixel array data stored in the image storage means for difference processing are combined. After taking the difference, a predetermined drawing element is extracted, encoded, and stored, and at the same time, the process of storing the drawing element as pixel array data in the difference processing image storage means is repeated.

It is characterized by displaying and providing drawing data for differential processing and providing encoded data as data for various processing operations.

[Embodiments of the invention]

FIG. 1 is a simple illustration of the principle of the invention. For example, a handwritten table as shown in Figure 1(a) is obtained as original drawing data, and as the first step in converting it into a code file, a drawing element called "straight line" is extracted and converted into a graphic primitive format. Suppose that it is encoded. At this time, the encoded drawing elements, that is, the straight lines, are stored in the form of handwritten pixel array data by providing a cutting range for each straight line, as shown by the broken line in FIG. Primitive codes, such as start point and end point coordinates, are stored in encoded form.

In general, drawing elements such as hand-drawn straight lines cannot be expected to completely overlap graphically with their graphic primitive encoded data, and it is impossible to erase the corresponding drawing element from the original drawing data using this graphic primitive encoded data. be. Also, for example, it may be possible to specify the erasure range of the original handwritten straight line by giving a certain line width to the straight line obtained as graphic primitive encoded data, but the curve of the handwritten straight line is large; In addition, if characters or the like are written adjacent to each other, there is a risk that part of the character components will be erased together with the handwritten straight line.

Therefore, the encoded drawing element is separately stored in the form of pixel array data, and a difference process is performed between the original drawing data and the pixel array data of the drawing element. As a result, in the middle stage of file creation, the original drawing data in Figure 1(a) and the drawing data of the drawing element (straight line) in Figure 1(b) are subjected to differential processing, that is, Figure 1(c It is possible to express drawing information by characters in drawing data in pixel array data format such as ) and straight lines in a format developed by expanding graphic primitive code data as shown in FIG. 1(d). Figure 1 (
e) is drawing information that is a superimposition of Fig. 1 (C) and Fig. 1 (d), and it is possible to provide drawing information in a format in which straight lines are neatly printed, and services corresponding to the stage of code file creation are possible. Become.

By adopting such a method, there is no need to erase the data in FIG. 1(b) on the storage device that stores the original drawing data in FIG. 1(b). Since the data is only added sequentially as drawing element encoding progresses, write-once memory can be used as a data storage device, and in particular, currently available memories such as optical disks can be used as a means of storing large amounts of data. It can be used effectively. In addition, in the next stage of converting into a code file, all the drawing information is converted into a code file by encoding the uncoded drawing elements, that is, the drawing data of the characters in Figure 1 (c). .

The second part describes an embodiment of the present invention, in which 1 is an image input device such as a facsimile, 2 is a first image storage device that stores original drawing data, and 3 is a difference processing between two drawing data. a subtractor, 4 a second image storage device for storing drawing elements in the form of pixel array data, 5 a frame memory, 6
1 is a drawing element extractor for extracting drawing elements such as figures, characters, and symbols; 7 is a drawing element encoder; 8 is an encoded data storage device; 9 is an output controller; and 10 is a decoder. Note that the positions of the storage devices 2, 4.8 on one screen correspond to each other on a one-to-one basis.

To operate this, first, a drawing is input through the image input device 1, and the original drawing data is stored in the first image storage device 2. The subtractor 3 performs difference processing for one screen between the original drawing data stored in the first image storage device 2 and the drawing data stored in the second image storage device 4, and frames the difference-processed data. Store in memory 5. In the first step of converting into a code file, nothing is stored in the second image storage device 4, and one screen worth of original screen data is stored as is in the frame storage 5. The drawing element extractor 6 is
Predetermined drawing elements such as straight lines, arcs, characters, and symbols are extracted from the difference-processed data stored in the frame memory 5.

The extracted drawing element is stored in a second format in the form of pixel array data.
At the same time, the data is stored in the image storage device 4 and encoded by the drawing element encoder 7 into a graphic primitive code or a character/symbol code. The encoded drawing element data is stored in the encoded data storage device 8.

Through the above operations, the graphic elements converted into graphic primitive codes or character/symbol codes in the first stage of code file creation are stored in the encoded data storage device 8. Furthermore, at the current stage of code file conversion, one drawing information includes the encoded data stored in the encoded data storage device 8, the original drawing data of the first image storage device 2 on the frame memory 5, and the second image. It is described by difference-processed data from the drawing data in the storage device 4, that is, pixel array data of unencoded drawing elements. At this point,
The output controller 9 receives the differentially processed data and the decoded data developed by the decoder 10, or the encoded data from the encoded data storage device 8 as they are, and, if necessary, converts the drawings in the process of converting them into encoded files. displayed to the user,
or provide the encoded data as is for processing by a computer. In this way, drawing information corresponding to the encoding stage is provided at any time during the process of creating an encoded file.

In the above, the drawing element extractor 6 may operate automatically, but when extracting drawing elements from a very complex drawing, it may operate interactively with the help of an operator.

Next, a process of extracting unencoded drawing elements from the drawing information accumulated as described above and encoding them will be explained. The subtractor 3 performs difference processing between the original drawing data stored in the first image storage device 2 and the encoded drawing data stored in the second image storage device 4,
The differentially processed data is stored in the frame memory 5. Thereby, the drawing element extractor 6 extracts the next drawing element from the unencoded drawing data stored in the frame memory 5. The extracted drawing element is the second
is stored in the image storage device 4 as pixel array data in addition to the already stored drawing data, and at the same time is encoded by the drawing element encoder 7 and stored in the encoded data storage device 8 as pixel array data. The MV is added to the stored encoded data.

By the above two operations, new drawing elements are sequentially encoded, and the differentially processed data and the encoded data storage device i'
By the encoded data stored in Y8, further code 5 is added.
-Drawing information is provided at an advanced stage.

〔Effect of the invention〕

As described above, according to the present invention, since drawing information can be provided according to the encoding stage, early database service is possible. Furthermore, even if the drawing data is extremely large, it is possible to configure the apparatus using a write-once memory such as an optical disk, so there is an advantage that a small-scale and inexpensive database can be provided.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention, and FIG. 2 is a configuration diagram of an embodiment of the present invention. 1. Input device, 2. Image storage device, 3. Differential device, 4. Image storage device, 5. Frame memory, 6. Drawing element extractor, 7. Drawing element encoder. ,
8... Encoded data storage device, 9... Output controller, ]0... Decoder.

Claims (1)

[Claims] (1) Extracting drawing elements such as straight lines, arcs, characters, and symbols from original drawing data, and repeating processing to calculate the difference between the original drawing data and the drawing data of the extracted drawing elements;
A drawing information filing method characterized in that the extracted drawing elements are sequentially encoded and added to an encoded data storage means as files, and drawing information corresponding to the encoded file generation stage is displayed and provided.