JPH04115377A - Dictionary registration method for pattern recognition system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a pattern recognition system, and more particularly to a method for registering a dictionary for symbol recognition.

B9 Summary of the Invention The present invention provides a pattern recognition system that converts a sample pattern including a symbol into an outline vector, registers it in a dictionary, simultaneously creates a font, and registers them together, thereby making it possible to combine the pattern recognition dictionary and the font. This simplifies mapping and reduces the effort required to create new fonts.

C8 Regarding the dictionary registration method of the conventional technology pattern recognition system, the applicant has previously published Japanese Patent Application No. 1-117869 and Japanese Patent Application No.
- proposed the technology of No. 120076.

To outline the former proposal with reference to FIG. 3, the image signal read by the image input section 31 is compressed into a thin line image or vectorized by the information compression section 32, and the pattern recognition section 33 performs pattern recognition. Pattern recognition is performed by comparison with registered patterns in the dictionary 34, edited by a recognition result editing section 35, and taken out as a recognition output of the original image.

On the other hand, the dictionary registration section 36 inputs the registered pattern written on the definition sheet as an original image to the image input section 31 and the information compression section 3.
2 as sample pattern information, and registers the shape feature information and connection information of this sample pattern in the pattern recognition dictionary 34. This facilitates the dictionary registration of figures.

In addition, to outline the latter proposal with reference to FIG. 4, the image signal read by the image input section 41 is compressed by the information compression section 42, and the pattern recognition section 43 converts the image signal into a registered pattern of the pattern recognition dictionary 44. Pattern recognition is performed by comparing the images, which are edited by the recognition result editing section 45 and taken out as the recognition output of the original image.

On the other hand, the dictionary registration pattern read by the image input section 4 is transferred to the original image correction section 46 and temporarily stored in its graphic memory, and this image is displayed on the CRT display device 47, so that visual judgment by the operator is inappropriate. In such a case, the user uses the mouse 48 or the keyboard 49 to perform correction processing. The registered pattern image optimized in this way is transferred from the graphic memory of the original image correction unit 46 to the information compression unit 42, and after the information is compressed, the dictionary management unit 50 extracts the features necessary for pattern recognition. It is registered in the pattern recognition dictionary 44. This ensures dictionary registration.

D9 Problems to be Solved by the Invention However, although the dictionary registration method of the pattern recognition system proposed above has the advantage of ensuring and facilitating the dictionary registration of figures, on the other hand, the recognition results cannot be transferred to a CRT, etc. When displaying character recognition results, fonts are prepared for character codes, such as JIS 1st level kanji codes and shift JIS codes, and these character codes can be used as recognition results, but in the case of symbols, Since fonts such as character codes are not prepared, the user has to create a display font separately in advance, and the problem remains that creating it requires a lot of effort.

The present invention has been made in view of the above problems, and its purpose is to reduce the labor required to create display fonts when registering sample patterns such as symbols in a dictionary, and to An object of the present invention is to provide a dictionary registration method for a pattern recognition system that simplifies correspondence pairs with fonts.

Means for Solving Problem E3 In order to achieve the above object, the configuration of the present invention is a dictionary registration system having means for compressing information on a sample pattern, converting it into a contour vector, and registering the vectorized pattern as a pattern recognition dictionary. In the method, the contour vectorized sample pattern is converted into font data and cleaned up, and the font data is stored in the pattern recognition dictionary. Dictionary registration becomes easier, and a figure similar to the font is created at the same time. Therefore, if this is processed into a font and stored together with the pattern recognition dictionary, the two can be managed while being associated with each other.

G. Example The present invention will be explained in detail below.

FIG. 1 is a block diagram showing a dictionary registration method according to an embodiment of the present invention.

Sample patterns such as symbols to be registered in the dictionary are written in advance on a definition sheet, which is read by an image input unit 1 such as an image scanner and converted into a binary image corresponding to black and white pixel data. This binary image is sent to the information compression section 2, where contour vector approximation processing is performed.

The sample pattern converted into a contour vector is stored in the dictionary registration section 7.
Here, features necessary for pattern recognition are extracted, and the results are registered in the pattern recognition dictionary storage section 8.

In addition, the sample pattern converted into a contour vector is temporarily stored in the memory of the font creation unit 3, and this stored image is displayed on a CRT to enable visual confirmation by the operator. The font data is cleansed using 6 or the like. For example, if the displayed image is contour vector data as shown in FIG. The font data is modified as shown in (b).

The cleanwritten font data is registered in the font storage section 8 adjacent to the pattern recognition dictionary storage section 8.

be done.

In this way, in this embodiment, the sample pattern converted into an outline vector in the information compression unit 2 is registered in the recognition dictionary in the dictionary registration unit 7, and at the same time, the font creation unit 3 can create a font for the sample. The management (correlation) of dictionaries and fonts has become easier.

In addition, since the font can be created based on the sample pattern converted into contour vectors in the information compression section 2,
It is now possible to create fonts through semi-automatic operations, so to speak.
Operator effort is significantly reduced.

H9 Effects of the Invention As explained above, according to the present invention, it is possible to reduce the labor required to create display fonts when registering sample patterns such as symbols in a dictionary, and to make correspondence between registered dictionaries and display fonts. It is possible to provide a dictionary registration method for a pattern recognition system that simplifies the process.

Note that the present invention can be used in a drawing input device, which makes it extremely easy to modify input drawings.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating a font cleanup process, in which (a) shows the font before processing and (b) shows the font after processing. Furthermore, FIGS. 3 and 4 both show a device configuration diagram of the dictionary registration method of the pattern recognition system according to the previous proposal. 1... Image input unit, 2... Information compression unit, 3... Phonograph processing unit, 4... CRT. 5...Mouse, 6...Keyrood, 7...Dictionary registration section, 8...Pattern recognition dictionary and font storage section. Figure 1 1-Eleven Issei Introduction 1 Group 2---4PE Yodangu 3----Fujitsu Toi-ki-t) 4-----CRT 5-----4? Slow q-v□-do 7-----IF Keengun 9-----Barter 7gah millet Lgg v"7v-7)
-G within 4 points (lI8- on a straight line of 18)

Claims (1)

[Claims] (1) In a dictionary registration method that includes means for compressing information on a sample pattern, converting it into contour vectors, and registering the vectorized pattern as a pattern recognition dictionary, the sample pattern converted into contour vectors is converted into font data and then fine-printed. and storing this font data in the pattern recognition dictionary.