JPH02268385A - Optical character reader - Google Patents

Abstract

PURPOSE:To easily correct a recognized result in a corrected screen by detecting a non-character reading object pattern in a specified color from a slip and displaying the character read result of a character corresponding to the inside of a character describing frame in the non-character reading object pattern. CONSTITUTION:In the slip to be defined as a processing object and an FC sheet, the character describing frame showing a character describing position and the name of an item corresponding to the character describing frame, etc., are printed in a drop-out color, which is not detected by a scanner 11a and the character showing FC information is written by a black point to be detected by the scanner 11a. The non-character reading object pattern is detected from an FC sheet where nothing is written in the character describing frame by a scanner 11b and the scanner 11a detects a slip image from the FC sheet. A control part 10 displays the detected non-character reading object pattern in a display part 16 and simultaneously displays the character read result of the character corresponding to the character describing frame in the character describing frame of the displayed non-character reading object pattern.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a method in which a frame indicating a character entry position and characters indicating an item name corresponding to the entry frame are recorded in advance using a dropout color. The present invention relates to an optical character reading device that reads characters written in a character entry frame from a written form.

(Prior Art) In general, forms to be processed by an optical character reading device have a character entry frame indicating the position of the character, an item name indicating the content to be entered in the character entry frame, etc. in a dropout color. preprinted by. An optical character reading device optically scans a form to be processed, thereby detecting a form image excluding character entry frames and item names printed in dropout color. Then, a character pattern is cut out for each character from the detected form image, and recognition processing is performed on this character pattern.

The verification results obtained through the recognition process are displayed on the correction screen. If any of the recognition results displayed on the correction screen are rejected or misidentified, the operator inputs the correct character data via the keyboard, etc., and the recognition results are corrected. There is.

(Problems to be Solved by the Invention) Normally, the recognition results displayed on the correction screen are only the characters obtained through recognition processing.

Therefore, when correcting the recognition results displayed on the correction screen, it is necessary to confirm which item the displayed characters relate to by checking the item names printed on the form. Ta.

As described above, in the conventional optical character reading device, there is a problem in that the work of correcting the recognition result is extremely troublesome and reduces work efficiency.

The present invention has been made in view of the above points, and an object of the present invention is to provide an optical character reading device that can easily modify recognition results on a modification screen and improve work efficiency. .

[Structure of the Invention] (Means for Solving the Problems) The present invention includes means for detecting a non-character reading target pattern from a form, and detects a character reading target pattern by a first pattern detection means for detecting a character reading target pattern. It is determined whether the writing position of the character corresponding to the character pattern read matches the image position of the character writing frame included in the non-character reading target pattern, and when it is determined that they match, the first The non-character reading target pattern detected by the pattern detection means is displayed, and the character reading result of the character corresponding to the character writing frame in the displayed non-character reading target pattern is displayed in the character writing frame. It is something to do.

(Function) The optical character reading device configured in this manner detects in advance a form image that includes a character entry frame printed with dropout color or characters that are not subject to character reading processing, It can be displayed together with the character reading results for the form.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an optical character reading device according to the same embodiment. In the figure, a control section 10 is responsible for controlling each section constituting the optical character reading device. The optical character reading device in this embodiment includes two scanners lla.

IIb is provided. The scanner lla is used to optically scan a document to be subjected to character reading processing to detect a character pattern of written characters. The scanner lla is configured not to detect specific color printing (dropout color). Further, the scanner llb optically scans the form and scans the form.
It is used to detect a character entry frame indicating a character entry position printed in a dropout color that is not detected by a, and a non-character reading target pattern that is not subject to character reading processing and indicating an item name of the character entry frame. scanner l
la is connected to a sheet buffer 12 that stores a form image for one form including the detected character pattern. The sheet buffer 12 includes a recognition unit 13 that performs character recognition processing.
connected to. The scanner llb is connected to a non-character reading target pattern storage unit 14 that stores non-character reading target patterns such as character entry frames printed in dropout colors for one form. The sheet buffer 12 and the non-character reading target pattern storage section 14 are each controlled by a control section l.
It is connected to the determination section 15 provided at O. The determining unit 15 determines the position of the character pattern in the form image stored in the sheet buffer ■2 and the non-character reading target pattern storage unit 1.
It is determined whether the position of the character entry frame in the non-character reading target pattern stored in No. 4 matches the position of the character entry frame. In addition, the control unit 1
0 is connected to the display section 1B. The display section 16 is
The recognition result in the recognition unit 13 and the non-character reading target pattern stored in the non-character reading target pattern storage unit 14 are manually input and displayed via the control unit IO.

Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG.

The form to be processed here is an FC as shown in Figure 3.
Make it a sheet. This FC sheet contains various information (F
C information) is used when registering. That is, on the FC sheet, a character entry frame indicating a character entry position, an item name corresponding to the character entry frame, etc. are printed in a dropout color that is not detected by the scanner lla. Then, the characters indicating FC information (1 in Figure 3)
The character "0" or "1" written in the character entry frame of the row is written in black color detected by the scanner IIH.

First, the scanner llb detects a non-character reading target pattern from an FC sheet in which nothing is written in the character writing frame (step Sl).

The scanner llb has a light source that emits light in a different wavelength range from the light source used in the scanner lla,
It is possible to detect dropout colors that are not detected by the scanner lla.

The scanner llb outputs a form image detected by optically scanning a blank FC sheet to the non-character reading target pattern storage section 14 . The non-character reading target pattern storage section 14 stores the non-character reading target pattern detected by the scanner llb.

Next, after detecting a non-character reading target pattern, a character pattern is detected from the FC sheet to be subjected to character reading processing on which characters have been written (step S2). That is, an FC sheet on which characters are written in a normal character writing frame is optically scanned by a scanner lla, and a form image including a character pattern of the written characters is detected.

Optical scanning by the scanner IIH does not detect non-character reading target patterns such as character entry frames and item names printed in dropout colors.

The scanner lla outputs the form image detected from the FC sheet to the sheet buffer 12. sheet buffer 1
2 stores the form image from the scanner Ha.

When the form image is stored in the sheet buffer 12, the determination unit 15 performs a character entry position determination process (step S3). This character writing position determination process will be explained with reference to FIGS. 4 to 6.

The determination unit 15 scans the non-character reading target pattern stored in the non-character reading target pattern storage unit 14, and detects a character entry frame as shown in FIG. Next, the determination unit 15
scans a form image as shown in FIG. 5 stored in the sheet buffer 12 to detect each character pattern. Based on the position of the detected character pattern, the determination unit 15 determines whether the position of the character written in the form to be subjected to the character reading process matches the position of the character entry frame in the pattern to be read. Determination is made (step S4). When the writing positional relationship between the character writing frame and the character pattern is as shown in FIG. 6, the determining unit 15 determines that the positions of the character writing frame and the character pattern match. Then, the non-character reading target pattern stored in the non-character reading target pattern storage unit 14 is used as the non-character reading target pattern of the form to be subjected to the character reading process, and the characters of the character recognition result displayed on the display unit 16 are used. Correction is made according to the size (step S5). Note that if it is determined by the character writing position determination process that the writing position does not match the position of the character writing frame, the non-character reading target pattern stored in the non-character reading target pattern storage section 14 is not displayed.

On the other hand, when the image for one sheet is stored in the sheet buffer 12, the recognition unit 13 selects one sheet from the stored image.
Character patterns are detected for each character.

Then, character recognition processing is performed on the detected character pattern (step S6). That is, the recognition unit 13 performs matching between a plurality of standard patterns stored in a dictionary file (not shown) and the extracted character patterns, and obtains a similarity value for each standard pattern. When the similarity value obtained by matching in the recognition unit 13 is higher than a predetermined value, the control unit 10 sets a character code for the character of the character pattern indicating this similarity value as a character recognition result. Here, if the similarity value obtained by matching is less than a predetermined value, the character of the character pattern targeted for matching is set as a reject character indicating that no recognition result was obtained (step 37). . Control part l
O transfers the non-character reading target pattern corrected for display and the result of character recognition processing to the display section 16. The display unit 16 simultaneously displays the non-character reading target pattern and the recognition results of each character written on the FCC sheet as a correction screen (step S8). The correction screen, as shown in Figure 7, displays the recognition result of the character corresponding to the character entry frame within the image of the character entry frame (the first line in the correction screen character "0" or "1").

In addition, if it is determined in step S4 that the non-character reading target pattern stored in the non-character reading target pattern storage unit 14 is not a non-character reading target pattern of the form to be processed, as shown in FIG. , displays only the character reading results. In addition, for characters that are set as rejected characters as a result of character recognition processing, "
? ” etc. is displayed in the text entry frame. Then, the operator inputs "?" from a keyboard (not shown) or the like.
When correct character data is input for the reject character indicated by "," the character data entered manually is corrected in place of the reject character (step S9).

In this way, on the correction screen, as shown in Figure 7, the character entry frame and the item name corresponding to the character entry frame are displayed together with the character recognition results, so the operator can determine which item the character corresponds to is rejected. You can tell from the screen.

Furthermore, if the character pattern of the reject character is displayed on the correction screen in a specific character entry frame (for example, the character entry frame where the cursor is located), it is possible to make it easier to correct the reject character.

[Effects of the Invention] As described above, according to the present invention, a non-character reading target pattern recorded on a form is displayed using a dropout color, and the same character writing area in the displayed non-character reading target pattern is displayed. By displaying the character recognition result corresponding to the character entry area, you can see from the display screen which character entry frame of the form the character recognition result corresponds to, so you can correct rejected characters, etc. This makes it possible to easily perform the following operations and improve work efficiency.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of an optical character reading device according to an embodiment of the present invention, Fig. 2 is a flowchart for explaining the operating procedure of the embodiment, and Fig. 3 is a process in the embodiment. A diagram showing the configuration of a part of the target FC sheet, Figures 4 to 6 are diagrams for explaining character entry position determination processing, and Figures 7 and 8 are diagrams showing display examples of correction screens. It is. 10...control unit, 12a, 12b...scanner,
13... Recognition section, 14... Non-character reading target pattern storage section, 15... Judgment section (judgment means), IB... Display section.

Claims (1)

[Claims] A first method for detecting a character pattern of characters written in a character writing frame from a form in which a non-character reading target pattern including a character writing frame indicating a character writing position is recorded in advance by printing in a specific color. In an optical character reading device, the optical character reading device includes a second pattern detection means and performs a character reading process based on the character pattern detected by the pattern detection means; a pattern detection means; a character entry position corresponding to the character pattern detected by the first pattern detection means; and a character entry frame included in the non-character reading target pattern detected by the second pattern detection means. a determination means for determining whether or not the character pattern matches the image position; and a character writing position corresponding to the character pattern detected by the first pattern detection means by the determination means;
When it is determined that the image position of the character entry frame detected by the second pattern detection means matches, the non-character reading target pattern detected by the first pattern detection means is displayed, and the non-character reading target pattern is displayed. 1. An optical character reading device comprising: display means for displaying a character reading result of a character corresponding to a character entry frame in a character entry frame in a non-character reading target pattern.