JP2001070889A - Sorting machine and sorting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a reading rate by changing the threshold of a projection in a row direction at a value higher than a preset value when a plurality of the checked rows displayed by a display means are checked as one row and executing the rerecognition processing of character strings in accordance with the threshold of the changed projection. SOLUTION: The check results of the rows are displayed on an operation panel 25. An operator judges the results of the recognition, the check results of the rows, the degrees of sticking o-f the characters, or the like, in accordance with this display. When the check results of the rows are checked by sticking the plural rows, the operator displays the same on the panel 25 and pushes down a plural row checking button for instructing the division of the synthesized rows. A control section 30 then judges that the plural row checking button is pushed and sets the threshold of the projection for checking the rows at the value higher than the preset value so as to allow the easy row division in a recognition unit 62. The recognition unit 62 executes the rerecognition in accordance with the threshold of the set projection and display the recognition results on the panel 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sorting machine for reading a surface on which a character string such as an address is described from a sheet such as a postal matter and performing character recognition on the read image to perform a sorting process. And classification method.

[0002]

2. Description of the Related Art Conventionally, in a sorter for sorting sheets, for example, a seven-digit number, a location, a character string, or the like indicating a specific area such as a postal code written on the sheets is recognized by character recognition. are doing.

In such a sorting machine, the same person
In some cases, a large amount of paper sheets called bulk having the same format (format) such as the same typeface, the same description position, and the same description direction are processed. When sorting such bulk paper sheets, the user designates a cursor around a coordinate where a character string (location, name, etc.) is described with respect to the read image of the paper sheet, and specifies a character of the character string. The recognition rate has been improved.

However, in the above sorter,
The line spacing between two character lines consisting of the location and name is narrow,
When two lines are attached to each other, if the lines cannot be divided in the recognition process, characters cannot be correctly recognized. Similarly, in the case where the character spacing is narrow and a plurality of characters are attached to each other, if they cannot be divided, they cannot be correctly recognized. Also, when one line is divided into a plurality of characters, or when one character is divided into a plurality of characters, characters cannot be correctly recognized.

[0005] In particular, since the location and the like are described in the same format in a bulk letter, if lines (areas) or characters cannot be correctly censored, all of the bulk papers cannot be recognized. There is a problem that it becomes.

[0006]

As described above, when a line or character to be recognized is attached to an adjacent line or character, or when one line or one character is easily divided, the line or character is I can't check correctly,
This solves the problem of being unrecognizable. Even if the line or character to be recognized is stuck to an adjacent line or character, or if one line or one character is easily divided, An object of the present invention is to provide a sorting machine and a sorting method that can correctly detect lines or characters and can recognize them.

[0007]

SUMMARY OF THE INVENTION A sorting machine according to the present invention reads a surface of a sheet on which a character string is described, performs character recognition on the read image, and sorts the sheet. Extracting means for extracting a projection in the line direction in the character string of the read image, and detecting each line based on the projection in the line direction extracted by the extracting means and a preset threshold value for the projection in the line direction. Character checking means for checking each character candidate from each line checked by the line checking means, and character recognition by performing character recognition of the character candidates checked by the character checking means. Display means for displaying a line cut off by the line check-off means when a character string becomes unrecognizable by the recognition means; and a plurality of cut-off lines displayed by the display means. Find rows as one row Changing the projection threshold for the line direction to a value higher than a preset value, and re-recognizing the character string based on the projection threshold changed by the changing means. The processing means performs the following.

A sorting machine according to the present invention reads a surface of a paper sheet on which a character string is described, performs character recognition on the read image, and sorts the paper sheet. Extraction means for extracting a row-direction projection in a column, a row-direction projection extracted by the extraction means, and a row detection / disconnection means for performing a row-based cutoff based on a preset threshold value of the projection in the row direction, A character checking means for checking each character candidate from each line cut by the line checking means;
A recognition unit that recognizes a character string by performing character recognition of a character candidate that has been cut off by the character cut-off unit; and a line cut by the line cut-off unit when the character string cannot be recognized by the recognition unit. Display means for displaying, when the cut line displayed by the display means is cut off as one line as a plurality of lines, the threshold value of the projection in the line direction is set to a value smaller than a preset value. And a processing unit for performing a character string re-recognition process based on the projection threshold value changed by the changing unit.

A sorting machine according to the present invention reads a surface of a paper sheet on which a character string is written, performs character recognition on the read image, and sorts the paper sheet. A line detection unit for checking a column for each line, an extraction unit for extracting a character direction projection in each line detected by the line detection unit, and a character direction projection extracted by the extraction unit. Character checking means for checking each character candidate based on a projection threshold for a given character direction, recognition means for performing character recognition of the character candidate detected by the character checking means, and recognizing a character string; A display means for displaying the read image when the character string becomes unrecognizable by the means; and a threshold for projection in the character direction when the space between characters displayed by the display means and adjacent characters is narrow. And a high changing means for changing the value, and processing means for re-recognizing process is performed in the character string based on the projection of the threshold changing this change means than preset value.

A sorting machine according to the present invention reads a surface of a paper sheet on which a character string is described, performs character recognition on the read image, and sorts the paper sheet. A line detection unit for checking a column for each line, an extraction unit for extracting a character direction projection in each line detected by the line detection unit, and a character direction projection extracted by the extraction unit. Character checking means for checking each character candidate based on a projection threshold for a given character direction, recognition means for performing character recognition of the character candidate detected by the character checking means, and recognizing a character string; Display means for displaying the read image when the character string becomes unrecognizable by the means, and in the character displayed by the display means, when each part constituting one character is separated, Changing means for changing the projection threshold in advance have been set lower than the value for, and and a processing means for performing re-recognition process of the character string based on the projection of the threshold changing this change means.

A sorting machine according to the present invention reads a surface on which a character string is written on a paper sheet, performs character recognition on the read image, and sorts the paper sheet. First to extract row-wise projections in columns
Extraction means, line inspection and disconnection means for inspecting each line based on the projection in the row direction extracted by the first extraction means and a preset threshold value for projection in the row direction. Extracting means for extracting a projection in the character direction in each line detected by the method, and a character based on the projection in the character direction extracted by the second extraction means and a preset threshold value for the projection in the character direction. Character checking means for checking each candidate, character recognition means for performing character recognition of the character candidates cut off by this character checking means, and recognizing a character string; when a character string cannot be recognized by this recognition means, Display means for displaying the read image and the line cut off by the line check and cut off means, the line cut off displayed by this display means,
When a plurality of lines are cut off as one line, the first instructing means for instructing the division of the combined line, and the cut-off lines displayed by the display means include a plurality of lines. The second instruction means for instructing the combination of the divided lines when the line is cut off as a line, and the character displayed by the display unit has a small space between adjacent characters.
Third instruction means for instructing the division of the synthesized character;
In the characters displayed by the display means, when each part constituting one character is separated, the fourth instruction means for instructing the combination of the divided characters and the first instruction means are instructed. At this time, the projection threshold for the row direction is changed to a value higher than a preset value, and the second
When the instructing means is instructed, change the threshold of the projection in the row direction to a value lower than a preset value,
When the third instruction means is instructed, the projection threshold for the character direction is changed to a value higher than a preset value, and when the fourth instruction means is instructed, the character A changing means for changing the projection threshold for the direction to a value lower than a preset value, and a processing means for performing a character string re-recognition process based on the projection threshold changed by the changing means. I have.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a sheet sorting apparatus 1 as a sorting machine according to the present invention, and FIG. 2 shows a sheet sorting system 11 in which the sheet sorting apparatus 1 of FIG. 1 is incorporated. .

As shown in FIG. 1, the paper sheet sorting apparatus 1 comprises:
Character string information such as a number and a location indicating a specific area is written on the first surface, or printed sheets are stored in an upright position with their rear ends aligned so that the first surface faces the same direction. A supply unit 2 for sequentially supplying these paper sheets to a predetermined take-out position is provided. A take-out unit 4 is provided at a take-out position for taking out the sheets supplied by the supply unit 2 one by one at predetermined intervals along the main transport path 3. The paper sheets accommodated in the supply unit 2 are arranged in such a manner that the number indicating the specific area is located above when the paper sheets are supplied to the removal position, and the first surface faces the removal unit 4. ing.

The paper sheets taken out at a constant take-out interval by the take-out section 4 are conveyed at a constant conveyance interval (pitch) by a main conveyance path 3 having a conveyance belt running at a constant speed. A foreign matter / hardness detecting unit 5 is provided on the main transport path 3 for detecting foreign matter in a sheet and detecting the hardness of the sheet itself when the sheet contains foreign matter. On the transport path branched from the main transport path 3 on the downstream side of the foreign matter / hardness detecting unit 5, exclusion of paper sheets that are determined to be impossible to machine by the foreign matter / hardness detecting unit 5 is excluded. An accumulation unit 5a is provided.

Main transport path 3 on the downstream side of foreign matter / hardness detector 5
A reading unit 6 that optically scans the first surface of the paper sheet on which the character string information is recorded to read an image of the first surface is provided on the top.

The main transport path 3 on the downstream side of the reading unit 6 is connected to a sorting / stacking unit 14 for sorting and stacking paper sheets into predetermined sorting pockets (sorting destinations). The sorting destination refers to a position of a sorting pocket where sheets are sorted and accumulated.

The section stacking section 14 has a plurality of section pockets 15 divided into a plurality of steps and a plurality of rows.
For example, 200 division pockets 15 in 8 rows and 25 rows,
... And each division pocket 15
Is assigned a predetermined pocket number. On the left side of the sorting / stacking section 14, a rejected paper sheet stacking pocket 17 for stacking sheets whose character strings cannot be recognized is provided.

A sorting gate (not shown) is provided above each sorting pocket 15 and the rejected sheet stacking pocket 17. By selectively switching the sorting gates, sheets are taken into the sorting pocket 15 and stacked. .
In addition, the section stacking section 14 has a plurality of step pass sections 16 extending in the horizontal direction above the section pockets 15 of each step.

Further, an information display 12 is provided at the center upper side of the sheet sorting apparatus 1 in the figure as an informing means for notifying a staff member of an abnormality of the apparatus. Notifies the user of the abnormal location when an abnormality occurs in the equipment,
An operation panel 25 on which various input operations are performed by a clerk is provided. On the right side of the sheet sorting apparatus 1 in the figure, control is performed to control the sorting operation of the sheet sorting apparatus 1 and constantly check the state of each unit. A unit 30 is provided.

Next, as shown in FIG. 2, the information display 12 and the operation panel 25 are connected to the control unit 30 of the sheet sorting apparatus 1.

The control unit 30 includes the sorting / accumulating unit 1
A sorting designation control unit 3 as sorting destination designation means for designating the sorting destination of the paper sheets in 4, ie, the sorting pocket 15;
2 are connected.

The sorting designation control unit 32 is configured to transmit the delivery route database 3 based on the character string information input from the control unit 30.
4 is searched, and the sorting destination of the sheet, that is, the sorting pocket 15 in which the sheet is to be sorted and accumulated is specified.
In the delivery route database 34, a delivery order for each sheet, character string information of the sheet, and a delivery section are recorded correspondingly.

The control unit 30 is connected to a discriminating unit 36 for recognizing character string information of paper sheets based on the image read by the reading unit 6. Whether the information can be recognized or not is returned to the control unit 30.

A delivery route database 34 is connected to the discriminating unit 36. When a sorting pocket for paper sheets is designated based on the character string information recognized by the discriminating unit 36,
Data communication is performed between the determination unit 36 and the delivery route database 34.

As shown in FIG. 2, the discriminating section 36 comprises a control unit 61 and a plurality of recognition units 62,.

The control unit 61 is connected to the operation panel 25 and controls the recognition units 62,... Based on the contents specified by the operation panel 25.

The recognition unit 62 recognizes a character string by performing character recognition of a number, a location, a name, and the like indicating a specific area from a read image of a sheet based on control by the control unit.

FIG. 3 is a diagram showing the configuration inside the recognition unit 62.

As shown in FIG. 3, the recognition units 62,... Comprise a recognition unit control module 70, an area detection / line cutoff module (ALSG) 71, and a quantization module (G).
T) 72, character checking module (CSG) 73, number information checking module (PSG) 74, number information recognition module (PRC) 75, first category information character identification module (CRC) 76, third category information character identification Module (CRCLV) 77, first category information word identification module (ARC) 78, third category information identification module (ARCLV) 79, second category information check module (NSG) 80, second category information identification module (NRC) 81, answer editing module (A
E) 82, Answer correction and pocket search module (PKT)
83, VCS auxiliary information creation module (VCSDT) 8
4 and a reading result CRT display control module (DCT) 85.

The recognition unit control module 70 includes:
It controls each module in the recognition units 62,...

The area / line disconnection module 71 is shown in FIG.
As shown in (1), the projection in the row direction is calculated for the image of the surface on which the character string on the sheet read by the reading unit 6 is described. Then, based on the projection threshold given from the control module 70 with respect to the calculated density distribution, a line is cut out for each region equal to or larger than the projection threshold.

The quantization module 72 performs a process of converting an image of a line cut out by the area / line detection and cutoff module 71 into a binary image.

As shown in FIG. 5, the character checking module 73 calculates the projection in the character direction from the image of each line binarized by the quantization module 72. And
A character candidate is cut out as one character for each area equal to or larger than the projection threshold based on the projection threshold given from the control module 70 for the calculated density distribution.

The number information checking module 74 cuts out a character candidate having a number indicating a specific area from the image binarized by the quantization module 72.

The number information recognition module 75 recognizes a number indicating a specific area from character candidates of a number indicating a specific area cut out by the number information checking module 74.

The first category information character identification module 76 recognizes a character corresponding to the first category information from character candidates of a character string cut out by the character checking module 73.

The first category information word identification module 78 includes a first category information character identification module 76.
From the identified character based on the first category information stored in the first category information dictionary (not shown).
It identifies category information words.

The third category information character identification module 77 identifies the character extracted by the character checking module 73 from the end of the second category information.

The third category information word identification module 79 includes a third category information character identification module 77.
Based on the identified character candidates, a third category information word is identified from a third category information dictionary (not shown).

The second category information checking module 8
0 is for recognizing the second category information candidate from the end of the first category information identified by the first category information word identification module 78 of the character extracted by the character checking module 73.

The second category information identification module 8
Reference numeral 1 denotes a second category corresponding to the first category information based on the second category information candidate recognized by the second category information checking module 80 and the first category information identified by the first category information word identification module 78. The second category information is identified from the second category information dictionary in which the information is stored.

The answer editing module 82 includes a number information recognition module 75, a first category information word identification module 78, and a third category information word identification module 79.
A recognition result code is generated from recognition results such as number information, first category information, second category information, and third category information identified by the second category information identification module 81.

The above-mentioned answer correction / pocket search module 83
Is to search for a pocket from the code of the recognition result and perform a process of correcting the answer by the flag of the pocket.

The VCS auxiliary information creation module 84
Is for generating recognition result data for a sheet image as OCR information to be transmitted to a VCS (not shown).

The reading result CRT display control module 85 converts the recognition result data for the sheet image created by the VCS
(Not shown) to make the data displayable on a monitor.

FIG. 6 is a diagram showing an example of a screen displayed on the operation panel 25. That is, the operator designates the bulk mode (cursor designation mode) and supplies sheets to the supply unit 2. Then, the image of the surface on which the character string of the paper sheet is described is read by the reading unit 6, and the discrimination of the line and the character is performed by the discrimination unit 36. The discrimination unit 36 performs a character string recognition process based on the line inspection result and the character inspection result.

At this time, if the character string cannot be recognized by the discrimination section 36, the paper sheet is rejected to the reject paper sheet accumulation pocket 17, and the control section 30 operates the operation panel as shown in FIG. At 25, the read image of the paper sheet and the result of the line closing are displayed. At this time, on the screen of the operation panel 25, a cursor for designating an area where a character string in the read image is described is displayed.

This cursor designates an area by moving points displayed on the upper left and lower right of the cursor designated area by touch keys. Also, at the upper left and lower right of the operation panel 25, keys indicating eight directions are displayed, and these keys can be pressed to specify an area.

The operation panel 25 includes:
The icon displayed as "Multi-line check-out"
Button) 25a, an icon displayed as "line split off"("line split off" button) 25b, an icon displayed as "multiple character off"("multiple character off" button) 25
c, and an icon (“character division check” button) 25d displayed as “character division check” is displayed.

These buttons are pressed by the operator after confirming the inspection result and the recognition result of the displayed line.

That is, the "multiple line closing" button 25
“a” is indicated when a plurality of lines are attached as one line because a plurality of lines are attached to the result of the line inspection. As a result, the threshold value of the projection when the line is cut off is reset so that a plurality of lines cut off as one line can be divided and cut off easily. For example, when a projection threshold value as shown in FIG. 4A is set, when the “multiple-line closing” button 25a is instructed, the projection threshold value is changed to a projection threshold value as shown in FIG. 4B.

The "line division check / off" button 25b is designated when one line is divided into a plurality of lines and cut off based on the line cutoff result. As a result, the threshold value of the projection at the time of cutting off the row is reset so that one row that has been cut off as a plurality of rows can be attached and cut off easily.
For example, in the case where a projection threshold as shown in FIG. 4A is set, when the “line division checkout” button 25b is instructed, the projection threshold is changed as shown in FIG. 4C.

The "multiple character cutoff" button 25c is instructed when a plurality of characters are cut off as one character because a plurality of characters are stuck as the degree of sticking of the characters. As a result, the projection threshold for character cutoff is reset so that a plurality of characters cut off as one character can be divided and cut off easily. For example, FIG.
If a projection threshold as shown in a of is set,
When the "multiple character cutoff" button 25c is instructed, the projection threshold is changed as shown in FIG. 5B.

The "character division check" button 25d is instructed when one character is divided into a plurality of characters and cut off as the degree of sticking of the characters. As a result, the threshold value of the projection when the character is cut off is reset so that one character that has been cut off as a plurality of characters can be attached and cut off easily. For example, when the projection threshold value as shown in FIG. 5A is set, when the “character division checkout” button 25d is instructed, the projection threshold value is changed to the projection threshold value as shown in FIG. 5C.

In the above example, when the paper sheet is rejected, the read image and the line inspection result are displayed. However, when the paper sheet is rejected, the read image is displayed. The character inspection result may be displayed according to the line inspection result.

As described above, the "multiple line closing" button,
Displayed by a "line division check" button, a "multiple character check" button, a "character division check" button, and an icon indicating the operation content, and the operator gives an instruction based on the read image and the line check result. It is like that. Thereby, the change of the projection threshold can be instructed by the icon indicating the instruction content,
It is possible to easily and quickly change the projection threshold without the need to change the threshold by a complicated operation.

Next, correction of line and character cutoff will be described with reference to the flowchart shown in FIG.

That is, when sorting a large number of bulk sheets prepared by the same person, the operator designates the cursor designation mode (bulk mode) on the operation panel 25 and starts the sheet recognition process. I do. At this time, if the character recognition for the character string of the paper sheet becomes impossible as a result of the character recognition, the paper sheet is rejected.

Then, the operation panel 25 displays
The row inspection result is displayed (step 1). Based on this display, the operator determines the recognition result, the line inspection result, the degree of sticking of the characters, and the like.

When the result of the line disconnection indicates that a plurality of lines are attached to each other, the operation panel 25
Is pressed, and a "multiple-line check-off" button (first instruction means) 25a for instructing division of the combined line is pressed.

Then, the control unit 30 determines that the multiple-line off button 25a has been pressed (step 2), and sets a projection threshold for the line recognition for the recognition unit 62 to be:
The value is set to a value higher than a value set in advance so as to facilitate line division (step 3). The recognition unit 62 performs re-recognition based on the set projection threshold (step 4), and displays the recognition result on the operation panel 25 (step 1).

As a result, the line to be cut off by the recognition unit 62 is easily divided, and even if there is a sticking portion, the line is correctly cut off.

When the result of the line cut-off indicates that one line is divided and cut off, the operator displays on the operation panel 25 and instructs to combine the divided lines. Button (second instruction means) 25a.

Then, the control unit 30 determines that the line division check button 25b has been pressed (step 5), and sets a threshold of projection for cutting the line to the recognition unit 62,
The value is set to a value lower than a preset value so as to make it difficult to divide the line (step 6). The recognition unit 62
Re-recognition is performed based on the set projection threshold (step 7), and the result of the re-recognition is displayed on the operation panel 25 (step 1).

As a result, the line to be cut off by the recognition unit 62 is difficult to separate, and the line to be cut off is correctly checked.

When the space between the characters is close, the operator displays on the operation panel 25 a "multiple character cutoff" button (third instruction means) 25c for instructing division of the combined character. Press.

Then, the control unit 30 determines that the multiple character cutoff button 25c has been pressed (step 8), and sets the projection threshold for cutting off the character to the recognition unit 62 to divide the character. The value is set to a value higher than a value set in advance so as to facilitate the operation (step 9). Recognition unit 6
2 performs re-recognition based on the set projection threshold (step 10), and displays the result of re-recognition on the operation panel 2.
5 is displayed (step 1).

As a result, the characters to be cut off by the recognition unit 62 are easily separated, and the cut-off characters are correctly cut off.

When the space between the characters is close, the operator displays on the operation panel 25 a "character division check" button (fourth instruction means) 25d for instructing the combination of the divided characters. Press.

Then, the control unit 30 determines that the character division check button 25d has been pressed (step 11), and sets the threshold value of the projection for cutting the character to the recognition unit 62 to the character division It is set to a value lower than a preset value so as to make it difficult to perform (step 12). The recognition unit 62 performs re-recognition based on the set projection threshold (step 13), and displays the result of the re-recognition on the operation panel 25 (step 1).

This makes it difficult for the character to be cut off by the recognition unit 62 to be separated, and the cut-off of the divided character is correctly performed.

As described above, when recognizing a character string of a paper sheet by character recognition and rejecting the paper sheet by checking lines or characters, the operator indicates the cause of the rejection, and the instruction is given. The re-recognition process is performed by changing the projection threshold based on the above.

As a result, a character string of a sheet that cannot be read due to the same cause can be recognized, and the reading rate can be improved.

[0075]

As described above in detail, according to the present invention, the line or character to be recognized is stuck to an adjacent line or character, or one line or one character is easily divided. However, it is possible to provide a sorting machine and a sorting method that can correctly detect lines or characters and can recognize the lines or characters.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a paper sheet sorting apparatus as an embodiment of the present invention.

FIG. 2 is a block diagram for explaining a control system of the sheet sorting apparatus.

FIG. 3 is a block diagram showing a configuration inside a recognition unit.

FIG. 4 is a diagram showing an example for explaining line disconnection.

FIG. 5 is a view showing an example for explaining character cutoff.

FIG. 6 is a view showing a display example of an operation panel.

FIG. 7 is a flowchart for explaining an operation when changing a threshold when performing line and character cutoff.

[Explanation of symbols]

 6 ... Reading unit 25 ... Operation panel 25a ... Multi-line check button 25b ... Line split check button 25c ... Multi-character check button 25d ... Character split check button 36 ... Discrimination unit 62 ... Recognition unit 70 ... Recognition unit control module 71: area detection / line detection module 73: character detection module

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 3F079 AA01 BA03 BA12 CA02 CA15 CA44 CB08 CC05 DA12 EA16 EA19 5B029 AA01 BB02 BB12 CC21 CC28 EE11 5B064 AA01 AA04 AB02 AB03 BA01 CA08 DA03 EA05 EA10 EA36

Claims (10)

[Claims] 1. A sorting machine for reading a surface on which a character string on a paper sheet is described, performing character recognition on the read image, and sorting the paper sheet. Extracting means for extracting the projection of the row, row detecting means for detecting the row direction based on the projection in the row direction extracted by the extracting means, and a preset threshold value of the projection for the row direction; A character checking means for checking each character candidate from each line checked by the checking means; a recognition means for recognizing a character string by performing character recognition of the character candidates checked by the character checking means; If the character string becomes unrecognizable by some means,
A display means for displaying a line cut off by the line cut-off means; and a line cut off displayed by the display means, wherein a plurality of lines are cut off as one line. Changing means for changing the projection threshold to a value higher than a preset value; and processing means for performing character string re-recognition processing based on the projection threshold changed by the changing means. Sorting machine characterized by the following. 2. A sorting machine for reading a surface on which a character string on a paper sheet is described, performing character recognition on the read image, and sorting the paper sheet. Extracting means for extracting the projection of the row, row detecting means for detecting the row direction based on the projection in the row direction extracted by the extracting means, and a preset threshold value of the projection for the row direction; A character checking means for checking each character candidate from each line checked by the checking means; a recognition means for recognizing a character string by performing character recognition of the character candidates checked by the character checking means; If the character string becomes unrecognizable by some means,
Display means for displaying the line cut off by the line cut-off means; and if the line cut off displayed by the display means is cut off as one line as a plurality of lines, Changing means for changing the projection threshold to a value lower than a preset value; and processing means for performing character string re-recognition processing based on the projection threshold changed by the changing means. Sorting machine characterized by the following. 3. A sorting machine for reading a surface on which a character string on a paper sheet is described, performing character recognition on the read image, and sorting the paper sheet. A line detection unit for extracting the projection in the character direction in each line detected by the line detection unit; a projection in the character direction extracted by the extraction unit; Character checking means for checking each character candidate based on a threshold value of projection in the direction; character recognition means for performing character recognition of the character candidates detected by the character checking means to recognize a character string; If the character string becomes unrecognizable by some means,
Display means for displaying the read image; and when the distance between characters displayed by the display means and adjacent characters is small, change the projection threshold value in the character direction to a value higher than a preset value. And a processing unit for performing a character string re-recognition process based on the projection threshold value changed by the changing unit. 4. A sorting machine for reading a surface on which a character string on a paper sheet is described, performing character recognition on the read image, and sorting the paper sheet. A line detection unit for extracting the projection in the character direction in each line detected by the line detection unit; a projection in the character direction extracted by the extraction unit; Character checking means for checking each character candidate based on a threshold value of projection in the direction; character recognition means for performing character recognition of the character candidates detected by the character checking means to recognize a character string; If the character string becomes unrecognizable by some means,
A display unit for displaying the read image; and, in a case where characters constituting the character displayed by the display unit are separated from each other, the threshold value of the projection in the character direction is set to be larger than a preset value. A sorting machine, comprising: changing means for changing to a lower value; and processing means for performing a character string re-recognition process based on the projection threshold value changed by the changing means. 5. A sorting machine for reading a surface on which a character string on a paper sheet is described, performing character recognition on the read image, and sorting the paper sheet. Extracting means for extracting a projection of the row direction, and a row inspection for performing row-based closing based on a projection in a row direction extracted by the first extracting means and a preset threshold value of the projection in the row direction. Cutting means; second extraction means for extracting a projection in the character direction in each line detected by the line detection means; and projection in the character direction extracted by the second extraction means;
A character checking means for checking each character candidate based on a preset threshold value of projection in the character direction, and a character string is recognized by performing character recognition of the character candidate checked by the character checking means. When the character string cannot be recognized by the recognition means,
Display means for displaying the read image and the line cut off by the line cut-off means; and a case where the cut-off line displayed by the display means is cut off with a plurality of lines as one line. A first instructing unit for instructing division of a combined line; and a cut-off line displayed by the display unit is divided when one line is cut off as a plurality of lines. Second instructing means for instructing the combination of the current line, and third instructing means for instructing the division of the combined character when the character displayed by the display means has a small space between adjacent characters. A fourth instruction means for instructing the combination of the divided characters when the respective parts constituting one character are separated from each other in the characters displayed by the display means; and When instructed, the projection in the line direction The value is changed to a value higher than a preset value, and when the second instruction means is instructed, the projection threshold for the row direction is changed to a value lower than a preset value. When the third instruction means is instructed, the threshold value of the projection in the character direction is changed to a value higher than a preset value, and when the fourth instruction means is instructed, Changing means for changing the projection threshold for the character direction to a value lower than a preset value; andprocessing means for performing a character string re-recognition process based on the projection threshold changed by the changing means. A sorting machine characterized by comprising: 6. A sorting machine for reading a surface on which a character string on a paper sheet is described, performing character recognition on the read image, and sorting the paper sheet. Is extracted for each line based on the extracted projection in the line direction and a preset threshold value for the projection in the line direction, and each of the extracted lines is terminated for each character candidate. When the character string is recognized by performing character recognition of the cut-off character candidate, and the character string cannot be recognized by the recognition of the character string, the cut-off line is displayed. In the case where the cut line is cut off with a plurality of lines as one line, the projection threshold in the line direction is changed to a value higher than a preset value, and the changed projection threshold is changed. Character string re-recognition processing based on Classification method to be. 7. A sorting machine for reading a surface on which a character string on a paper sheet is described, performing character recognition on the read image, and sorting the paper sheet. Is extracted for each line based on the extracted projection in the line direction and a preset threshold value for the projection in the line direction, and each of the extracted lines is terminated for each character candidate. When the character string is recognized by performing character recognition of the cut-off character candidate, and the character string cannot be recognized by the recognition of the character string, the cut-off line is displayed. When the cut line is cut off as one line as a plurality of lines, the projection threshold for the row direction is changed to a value lower than a preset value, and the changed projection threshold is changed. Character string re-recognition processing based on Classification method to be. 8. A sorting machine for reading a surface on which a character string on a paper sheet is described, performing character recognition on the read image, and sorting the paper sheet. The projection in the character direction in each of the lines thus extracted is extracted, and the projection is performed for each character candidate based on the extracted projection in the character direction and a preset threshold value for the projection in the character direction. When the character string is recognized by performing character recognition of the cut character candidate, the read image is displayed when the character string becomes unrecognizable by the recognition of the character string. If the distance between the characters to be projected is narrow, the projection threshold for the character direction is changed to a value higher than a preset value, and the character string is re-recognized based on the changed projection threshold. A classification method characterized in that: 9. A sorting machine for reading a surface on which a character string on a paper sheet is described, performing character recognition on the read image, and sorting the paper sheet. The projection in the character direction in each of the lines thus extracted is extracted, and the projection is performed for each character candidate based on the extracted projection in the character direction and a preset threshold value for the projection in the character direction. When the character string is recognized by performing character recognition of the cut character candidate, and when the character string cannot be recognized by the recognition of the character string, the read image is displayed. When the parts constituting one character are separated, the projection threshold value in the character direction is changed to a value lower than a preset value, and the character string is re-recognized based on the changed projection threshold value. Perform processing Classification how to. 10. A surface on which a character string on a sheet is described, and character recognition is performed on the read image,
In a sorting machine for sorting paper sheets, a line-direction projection in the character string of the read image is extracted, and a line-projection is performed based on the extracted line-direction projection and a preset projection threshold for the line direction. The projection in the character direction in each of the lines thus extracted is extracted. Based on the extracted projection in the character direction and a preset threshold value for the projection in the character direction, each character candidate is inspected. Then, the character string is recognized by performing character recognition of the cut character candidate, and when the character string cannot be recognized by the recognition of the character string, the read image and the cut line are displayed. When the displayed cut-off line has been cut off with a plurality of lines as one line, the division of the combined line is instructed by the first instruction means, and the displayed cut-off line is displayed. Line is detected as one line In the case where the displayed characters are instructed to be combined by the second instruction means, and when the displayed characters have a small space between adjacent characters, the combined characters are divided in the second manner. In the displayed characters, when the parts constituting one character are separated from each other, the combining of the divided characters is performed by the fourth means.
When the first instructing means is instructed, the projection threshold in the row direction is changed to a value higher than a preset value, and the second instructing means instructs. When the third instruction means is instructed, the projection threshold for the line direction is changed to a value lower than a preset value, and the projection threshold for the character direction is set in advance when the third instruction means is instructed. And changing the projection threshold for the character direction to a value lower than a preset value when the fourth instruction means is instructed; And performing a character string re-recognition process based on a projection threshold value changed by an instruction from the second, third, and fourth instruction means.