JPH03118676A - Character / graphic reading system - Google Patents

Abstract

PURPOSE:To improve accuracy for a recognition processing when a picture is written with the plural stages of density by recognizing inputted character and graphic patterns based on the plural kinds of the density decided by a recognition density deciding means, and displaying recognized results in stages. CONSTITUTION:A time chart 1 is scanned by a scanning means 2 and the distribution of black picture elements in an obtained waveform pattern, for example, is calculated by a recognition density deciding means 10 so as to determine reference density 11. In a recognizing means 5a, recognition is executed respectively to the density 11 obtained by the means 10, a value 12 deviating the density 11 to shade and a value 13 deviating the density 11 to light, and the recognized results are stored in a storing means 6. In a control means 9a, based on the recognized results stored in the means 6, the probability of the recognition is calculated and the recognized results are displayed by a display means 7 in stages with a method to change a color, for example. When unreadable characters or erroneously read characters are existent in the recognized results displayed in stages, a worker executes correction work by using an input means 8. Thus, even when the picture is written to a recording medium with the plural stages of the density, the recognition processing is executed with the high accuracy.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to character/figure reading devices such as time chart reading devices that automatically read time charts written in a mixture of letters and waveforms. This relates to the reading method.

[Conventional technology]

FIG. 3 is a block diagram showing the configuration of a conventional time chart reading device (character/figure reading device).

In the figure, reference numeral 1 denotes a recording medium such as a form or paper on which character patterns and waveforms (figures) to be read are written or printed, and will be described below as a time chart.

2 is a scanning means such as an image scanner that scans and photoelectrically converts characters and waveforms on the time chart 1; 3 is a means for converting these areas into a character area and a waveform area when character patterns and waveform patterns are mixed; Character waveform separation means (
4 is a recognition dictionary storing the reference pattern of the character to be recognized in a ROM, etc.; 5 is a recognition dictionary for character patterns and waveform patterns separated by the character waveform separation means 3; By comparing the input character pattern with the reference pattern in the recognition dictionary 4, a specified number of recognition candidate characters and their similarities are output in descending order of similarity, and for waveform patterns, continuous waveform patterns are output. 6 is the recognition result sent from the recognition means 5. R that stores recognition candidate characters, their similarities, and waveform pattern recognition results;
Storage means consisting of AM, etc., and 7 a CRT for displaying the recognition result characters, waveforms, and recognition candidate characters stored in the storage means 6.
A display means such as a display, and 8 a keyboard etc. for selecting characters from recognition candidate characters and inputting correct characters and waveforms for unreadable characters and misread characters found from the recognition results displayed on the display means 7. The input means 9 controls the storage means 6, the display means 7 and the input means 8, and displays the recognition result stored in the storage means 6 on the display means 7 based on the recognition target character and rf and its similarity. This control means displays the recognition result based on the corrected input from the input means 8 on the display means 7, and performs a process of replacing unreadable characters and misread characters with correct characters and waveforms based on the corrected input from the input means 8.

Note that the recognition means 5 and control means 9 are realized by a microprocessor or the like.

Next, the operation will be explained.

Character patterns and flow patterns obtained as a result of scanning the time chart 1 by the scanning means 2 are separated into a character region and a waveform region by the character waveform separation means 3. The recognition means 5 is
The given pattern is sequentially compared with the reference pattern stored in the recognition dictionary 4 at a preset density, and characters and waveforms with a high degree of similarity are output to the storage means 6 and stored therein. The control means 9 displays the recognition candidate characters and waveforms stored in the storage means 6 on the display means 7.

The operator looks at the contents displayed on the display means 7 and corrects unreadable characters or misread characters using the input means 8 such as a keyboard.

[Problem to be solved by the invention]

Conventional character/figure reading device (time chart reading device)
is configured as described above, and performs a certain recognition process regardless of the shading of the characters and waveforms written on the time chart.For example, when the waveforms are written on the time chart with the same shading, The problem is that the recognition process cannot be performed accurately if the waveform is written in multiple levels of density to make the contents of the time chart easier to understand. was there.

This invention was made to solve the above-mentioned problems, and it provides a character and waveform that can be recognized with high accuracy even when characters and waveforms are written on a recording medium at multiple levels of darkness. The purpose is to provide a graphic reading method.

[Means to solve the problem]

The character/figure reading method according to the present invention includes a recognition density determining means 10 for determining the density of characters or figures based on the character pattern or graphic pattern obtained from the scanning means 2, and the recognition means 5a The display means 7 recognizes the input character pattern or graphic pattern based on the density determined in step 1, and displays the recognition results step by step.

[Effect]

The density of characters and figures is determined by the recognition density determination means 10 based on the character and figure patterns obtained from the scanning means 2. The recognition means 5a recognizes character patterns and graphic patterns based on the density. Therefore, the recognition results are displayed on the display means 7 in stages according to a plurality of densities.

[Embodiments of the invention]

FIG. 1 is a block diagram showing the configuration of a time chart reading device (character/graphic reading device) using a character/graphic reading method according to an embodiment of the present invention.

In FIG. 1, components corresponding to those shown in FIG. 3 are designated by the same reference numerals, and their explanations will be omitted. In FIG. 1, reference numeral 10 denotes a recognition density determining means for determining the density of characters and figures based on the character patterns and figure patterns obtained from the scanning means 2.

Further, the recognition means 5a of this embodiment is a conventional recognition means 5.
In addition to the functions of the conventional control means 9, the control means 9a has a function of performing recognition at a plurality of densities, and a function of displaying recognition results on the display means 7 in stages.

Note that the above-mentioned recognized concentration determination means 10. The recognition means 5a and the control means 9a are realized by a microprocessor or the like.

Next, the operation of this embodiment will be explained. In addition, the above [
A description of the same content as that described in the section ``Prior Art'' will be omitted, and only newly added and changed means will be described here.

The recognized density determining means 10 scans the time chart 1 as shown in FIG. 2 with the scanning means 2 to determine the distribution of black pixels within a waveform pattern, for example, and determines the reference density 11. The recognition means 5a uses the reference density 11 obtained by the recognition density determination means 10, a value 12 obtained by shifting the reference density 11 to the darker side, and a value 13 obtained by shifting the reference density 11 to the lighter side.
Each of these is recognized and stored in the storage means 6. The control means 9a calculates the recognition probability based on the recognition results stored in the storage means 6, and displays the recognition probability on the display means 7 in stages by changing the color, for example, white, yellow, red, etc. indicate. When an unreadable character or a misread character is found in the recognition result displayed step by step on the display means 7, the operator uses the input means 8 to perform correction work.

In this way, in the above embodiment, the recognized density determining means 10 determines the density of the characters and waveforms written on the time chart 1, and the determined value is shifted by a certain value to the darker side and by a certain value to the lighter side. By performing recognition using the calculated values, the recognition results can be displayed step by step.

In the above embodiment, recognition is performed at three levels of density, but it is also possible to perform at levels other than three levels. Furthermore, it is of course possible to display the information on the display means 7 in a step-by-step manner other than by changing the color. Further, in the above embodiment, the waveform of the time chart is used to recognize the waveform, but the present invention is not limited to this, and other figures can also be recognized.

〔Effect of the invention〕

As described above, according to the present invention, input character patterns and graphic patterns are recognized based on a plurality of densities determined by the recognition density determination means, and the recognition results are displayed in stages. Even when characters or waveforms are written on a recording medium in varying degrees of darkness, the effect of recognition processing can be achieved with high accuracy.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a time chart reading device using a character/figure reading method according to an embodiment of the present invention, and FIG. 2 is a distribution of black pixels for determining recognition density in this embodiment. 3 are block diagrams showing the configuration of a conventional time chart reading device. DESCRIPTION OF SYMBOLS 1... Time chart, 2... Scanning means, 3... Character waveform separation means (character figure separation means), 4... Recognition dictionary, 5a. ... Recognition means, 6 ... Storage means, 7 ... Display means, 8 ... Input means, 9a ... Control means, 10. ...Recognized concentration determination means.

Claims (1)

[Claims] A scanning means for scanning and photoelectrically converting characters and figures on a recording medium; a recognition dictionary storing reference patterns of characters to be recognized;
The character pattern separated by the character/figure separation means is compared with the reference pattern in the recognition dictionary, and the recognition candidate characters with high similarity and their degree of similarity are output as recognition results. is a recognition means for recognizing by the position cut out by dividing into fixed units; a storage means for storing the recognition candidate characters and their degrees of similarity; and a recognition result of the graphic pattern; and contents stored in the storage means. a display means for displaying a recognition result, an input means for inputting a correction according to the recognition result displayed on the display means, and an input means for controlling the storage means, display means and input means to display candidate characters for recognition and their similarity. In the character/figure reading device, the character/figure reading device is equipped with a control means for displaying the recognition result based on the recognition result and a control means for performing a replacement process with the correct character or figure based on the corrected input. Recognized density determination means for determining density is provided, the recognition means recognizes the input character pattern or graphic pattern based on the plurality of densities determined by the recognized density determination means, and the display means displays the recognition result. A character/figure reading method characterized by step-by-step display.