JPS5856078A - Modified character display method in optical character reader - Google Patents

Abstract

PURPOSE:To recognize and judge characters visually and accurately, and to improve the efficiency of correcting operation, by displaying a character or a group of characters which can not be recognized in a different display mode from circumferential recognized characters, etc., simultaneously with the circumferential characters. CONSTITUTION:Picture, read by a reading scanner SC and stored in a buffer memory BUF temporarily, are read successively and then converted into prescribed codes by a character recognizing circuit CRC. At this time, when the circuit CRC focuses on one candidate character easily, when plural candidate characters are obtained, and when no candidate character is identified, different display codes are supplied to a character buffer memory CBUF. Then, a character generator CG is controlled by the output of the memory CBUF, and a display device DISP displays a character or a group of characters which can be recognized, and also displays a character or a group of characters which can not be recognized in different color or by flashing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for displaying unrecognizable characters or groups of characters, ie modified characters, in an optical character reading device.

Generally, when recognizing characters using an optical character reader,
Some characters are impossible to read. This is particularly noticeable when reading handwritten characters.

In other words, handwritten characters often do not form a fixed pattern because each person has their own habits. Note that in this specification, one character includes not only letters but also numbers, symbols, and code numbers.

In order to process such ww & impossible characters, conventionally the impossible characters themselves were displayed on the OR display device, and the operator Go visually identified the characters and corrected them by keying in the correct characters. This is a common method.

However, as mentioned above, handwritten characters are generally unique and it is true that there are some characters that are difficult to distinguish even by a single person's visual inspection. Therefore, in such a case, as in the conventional method, Kl! ! Even if the momme of an unrecognizable character is displayed, it is extremely difficult to determine the correct character.0For example, as shown in Figure 1,
It is not possible to decipher whether the letter shown in ←) is "i" or "a", and it is not possible to decipher whether the number shown in (a) K is "6" or "san".This is a drawback of the conventional method. This problem occurs due to the display of only characters that cannot be displayed on the OR display device.

On the other hand, in the conventional method, V! A method is used in which unrecognizable characters are displayed as one character and then processed separately.

However, when there are a large number of unrecognizable characters, displaying and processing them as / characters causes a problem in that work efficiency is significantly reduced.

<Purpose> Therefore, the present invention provides a modified character display method that can easily and accurately judge such unrecognizable characters by human visual judgment, and that can improve the efficiency of the first judgment operation. The purpose is to provide.

According to the present invention, in order to achieve the above object, an unrecognizable character or character group is combined with surrounding correctly recognized characters or character groups, and the surrounding correctly recognized characters or characters are A group is something that is displayed on a display device in a different display format.

That is, the present invention focuses on the fact that only unrecognizable characters are displayed, which is the cause of the conventional problems. If it is known, it can be used as information for judgment, and judgment can be made easily and accurately.

Therefore, it was decided to simultaneously display the correctly recognized characters or character groups surrounding the KV unrecognizable characters. Furthermore, since processing for each character is inefficient, the present invention aims to solve the problem by making it possible to display each character group.

<Example> The present invention will be described in detail below based on an illustrative example. FIG. 1 is a four-dimensional diagram showing the main parts and display section of an optical character reading device for realizing the corrected character display method according to the present invention.

In FIG. 1, the WJ data read by the reading scanner 80 is temporarily stored in a buffer memory BUa.

Is the stored image in the buffer memory BIT? One character recognition circuit 0! It is converted into a predetermined character code from tOK.

Character recognition circuit 0! In 'IO, multiple characters are generally fixed for one read character pattern, but this may vary depending on the aspect of the original image (i.e., the degree of similarity to the standard pattern). It is.

■ When the candidate characters can be narrowed down to one, write the corresponding character code and the display code indicating that there is only one candidate character in the character buffer C! Send to BUν.

■ If the candidate characters cannot be narrowed down to one (if there are multiple candidate characters), store the character code with the 181st similarity and the display code indicating that the candidate character is not definitive and there are multiple candidate characters in the character buffer. Send 0BUIFK.

■ If you cannot identify even the 7 candidate characters.

Part or all of the read character pattern is encoded as it is, and a display code indicating that the number of candidate characters is zero is sent to the character buffer 0BtTIPK.

Character buffer 0BUF sets the character code to character generator C3C.
On the one hand, one display code is sent to the display device DI8P.

The display device DI8F displays the character pattern from the character generator Ca, for example, one digit on the apTm screen, and also displays the display code from the one character buffer BtrF on the CRT.
The display mode of the 6-character pattern displayed on the screen is as follows.

The character pattern corresponding to the above is a correctly recognized character, so is it an OR? displayed on the screen. However, character patterns that fall under ■ or ■ above are character patterns that require human visual judgment.
Some means of identifying this is required. Therefore, in the present invention, an unreadable character (the above @ or Possible characters are displayed on the 0RTWIJ surface in a display mode different from the correctly recognized characters around them. These different display modes are, for example, as shown in Figure J and Figure Reference. □Figure 3 is an example showing one line of a certain English sentence. In this example, unrecognizable parts are indicated by broken lines. The cursor (or sharp distinction marker) is shown surrounded by C and k.

The characters that were correctly recognized are also shown. il!
! For unrecognizable parts, the read pattern is displayed as is, as shown in Figure 3), and in this state, 1
It is not clear whether it is m1 or 11n'. However, by displaying the unknown part along with the surrounding (before and after) characters as in the present invention, an appropriate word can be determined from the meaning of the sentence, and the correct spelling can be determined from the spelling of the word. The corresponding character, ie, % in #, can be easily found. In other words, the amount of information for one determination increases. The cursor C may be displayed simply by surrounding the relevant character with a broken line, or may be underlined, or the cursor 0 may be displayed blinking, thereby further attracting attention.

In addition, although unrecognizable characters may be used in combination with the above-mentioned cursor 0, it is also possible to display only the relevant characters in a different color or density from other characters to distinguish them.
The above display modes may be combined as appropriate.

Note that Fig. 3) is a display example in the case of @, that is, an example in which an uncertain pattern is displayed, and as a result of knowledge, it is determined to have the highest degree of similarity and is displayed. This will be shown in the display mode as described above.

The above explanation is based on the case where the display on the C5 display device Riko 8P is 7 lines, but it is displayed within a range that does not hinder the operator's identification, for example, 7 phrases. You can also do that. This is particularly effective when unrecognizable characters occur randomly, and there is a reason why a single character group is useful in understanding the meaning of a sentence over a wide range and in unifying processing.

<Effects> As described above, according to the present invention, recognition is achieved by displaying an unrecognizable character or character group together with surrounding correctly recognized characters or character groups in a display mode different from other parts. Impossible parts will be displayed at the same time while being clearly distinguished from other draws, which will increase the amount of judgment information when making a judgment, making it easier and more accurate for humans to make visual judgments. sell. In addition, determining display 1 in this manner improves work efficiency even when determining a group of characters.

[Brief explanation of the drawing]

Figure 1 (a), cb) is 1Iiii! ! FIG. 1 is an explanatory diagram showing an example of an impossible character. FIG.
FIG. 3 is an explanatory diagram showing a display example according to the present invention. Figure (a) is an explanatory diagram showing an example of unreadable characters displayed as they are, and Figure (b) is a station diagram showing an example of a character pattern displayed as the first in the @ bias as a result of recognition. be. SO...reading scanner, BiF3-buffer memory,
ORO...Character recognition circuit, (!BITIF...Character buffer memory, CG...Character generator, D engineering sp...
-Display device, 0...Cursor. Izuhito agent Kiyoma Inomata 1 Figure 01) (b) °ヱ, φ. Horse 2 figure Horse 4 figure 38

Claims (1)

[Claims] 1. In an optical character reading device, an unrecognizable character or character group together with surrounding correctly recognized characters or character groups, and surrounding correctly recognized characters or A modified character display method in an optical character reading device, characterized in that a character group is displayed on a display device in a display format different from that of a group of characters. (h) In the method described in claim 1, an optical character reading device is characterized in that an unrecognizable character or literary group is displayed in a different color from surrounding correctly recognized characters or character groups. Modified character display method. ,y,q! 1. In the method according to claim 1. A corrected character display method in an optical character reading device, characterized in that an illegible character or character group is displayed in a blinking manner in a display format different from that of correctly arranged characters or character groups immediately surrounding K. In the method described in claim 1, ! &!
! ! An optical character reading device characterized in that when an unrecognized character or character group is displayed with a predetermined symbol or code attached, the display form is different from that of surrounding correctly recognized characters or character groups. A way to display corrected characters to keep you busy. ! , in the method according to claim 1. An optical character reading device characterized in that an unrecognizable character or character group is displayed with an identification marker or cursor in a display format that is different from that of correctly recognized characters or character groups in the vicinity. Modified character display method.