JP5012133B2 - Bar code reader and program - Google Patents

Description

  The present invention relates to a barcode reader and a program.

Light is emitted when a bar code (see FIG. 21) having defects such as poor print quality or partly damaged is read by a one-dimensional scanner using laser light or the like as a light source. Depending on the position, it cannot be read accurately and cannot be decoded. However, since the actual reading operation is performed with the user holding the scanner in his / her hand, various positions on the barcode surface are read by the movement of the user's hand during reading. For this reason, in the case of a barcode having a defect as shown in FIG. 21, as shown in FIG. 22, the images respectively obtained by multiple readings in which the light irradiation position (irradiation line) differs depending on the movement of the user's hand. Data is stored in a memory, and a process of reproducing and decoding as correct image data by a synthesis process such as superimposing the respective image data is performed (for example, see Patent Document 1).
Japanese Unexamined Patent Publication No. 7-57035

  However, as described above, since the barcode reading operation is performed with the user holding the scanner in his / her hand, the irradiation position of the light being read is caused by the movement of the user's hand. In addition to moving up and down as shown in FIG. 22, it changes in various ways, such as moving in the bar arrangement direction or tilting with respect to the arrangement direction. Therefore, there is a problem in that an accurate reading result cannot be obtained even if image data obtained by a plurality of readings are synthesized as they are.

An object of the present invention is to enable accurate combining processing by correcting each acquired barcode image data based on the moving state of the reading unit before combining the barcode image data .

The barcode reading apparatus according to claim 1, a reading unit that reads a barcode a plurality of times and acquires a plurality of barcode image data, and a storage unit that stores the barcode image data acquired by the reading unit; detection means for detecting a plurality of moving state of the three-dimensional space of said reading means during the reading operation of the bar code, based on a plurality of moving state of the three-dimensional space detected by said detecting means, each of A correction unit that corrects the bar width in each acquired barcode image data for each correction process by performing correction processing corresponding to the moving state, and each barcode image data corrected by the correction unit are combined. Combining means for generating composite image data, and a decoder for decoding the composite image data generated by the combining means. It includes an over de means.

According to a second aspect of the present invention, in the barcode reading apparatus according to the first aspect, the detection unit detects the moving state using a gyro sensor, and the gyro sensor detects an acceleration of the reading unit. And an inclination sensor for detecting the inclination of the reading means caused by the movement of the reading means .

According to a third aspect of the present invention, in the barcode reading apparatus according to the first or second aspect, the detection unit is a moving state in which the reading unit is moved closer to the barcode or the reading unit is the bar code. Any of the movement states moved away from the code is detected, and when the reading means moves closer to the barcode, the correction means narrows the bar width according to the moving distance of the reading means. When the barcode image data is corrected so that the reading means moves away from the barcode surface, the barcode image data is set so that the bar width increases according to the moving distance of the reading means. Correct.
According to a fourth aspect of the present invention, in the barcode reader according to any one of the first to third aspects, the detection unit is a moving state in which the reading unit is inclined with respect to the barcode and irradiated with light. The correction means corrects the bar width of the barcode image data according to the inclination angle of the reading means when the reading means is inclined with respect to the barcode and irradiated with light.
According to a fifth aspect of the present invention, in the barcode reading apparatus according to any one of the first to fourth aspects, the detection means has a movement state in which the reading means moves in the bar arrangement direction with respect to the barcode. When the reading means moves in the bar array direction with respect to the barcode, the correction means corrects the width of the start margin of the barcode image data according to the moving distance of the reading means.
According to a sixth aspect of the present invention, in the barcode reading apparatus according to any one of the first to fifth aspects, the detecting means emits light with the reading means inclined with respect to the bar arrangement direction of the barcode. The irradiation movement state is detected, and the correction means responds to the inclination angle of the reading means with respect to the bar arrangement direction when the reading means is irradiated with light inclined with respect to the bar arrangement direction of the barcode. Correct the bar width of the barcode image data.
The invention according to claim 7 is a computer that reads a barcode a plurality of times by a reading unit, acquires a plurality of barcode image data, a unit that stores the acquired barcode image data in a storage unit, Means for detecting a plurality of movement states in the three-dimensional space of the reading means during a barcode reading operation, and correction corresponding to each movement state based on the detected plurality of movement states in the three-dimensional space Means for correcting the bar width in each acquired barcode image data for each correction process by performing each processing, means for generating combined image data by combining the corrected barcode image data, It is a program for functioning as a means for decoding generated composite image data.

According to the present invention, before the barcode image data is synthesized, each of the acquired images is obtained by performing correction processing corresponding to each movement state based on a plurality of movement states in the three-dimensional space of the reading unit. By correcting the bar width in the barcode image data for each correction process , an accurate composition process can be performed and an accurate reading result can be obtained.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the configuration in the present embodiment will be described.

  FIG. 1 shows a main part configuration of a barcode reading apparatus 1 according to an embodiment of the present invention. The barcode reader 1 is a hand-held reader that allows a user to read a barcode while holding the scanner portion in his / her hand. As shown in FIG. 1, a CPU (Central Processing Unit) 10, a display unit 11, an input unit 12, a storage unit 13, a RAM (Random Access Memory) 14, a reading unit 15, and a gyro sensor 16, and each unit is electrically connected via a bus 17 and receives power supply from a power supply unit 18.

  The CPU 10 develops various control programs stored in the storage unit 13 in the RAM 14 and performs various processes in cooperation with the control programs. Specifically, the CPU 10 performs a barcode reading process according to a control program stored in the storage unit 13 (see FIG. 2).

  The display unit 11 includes a display such as an LCD (Liquid Crystal Display), and performs a required display process according to a display control signal input from the CPU 10.

  The input unit 12 includes various keys such as a trigger key for starting barcode reading, and a touch panel provided so as to cover the display screen of the display unit 11, and an operation signal generated by key operation or touch panel operation. Is output to the CPU 10.

  The storage unit 13 stores various control programs executed by the CPU 10 and data necessary for executing these control programs.

  The RAM 14 has a program storage area for developing various control programs executed by the CPU 10 and a data storage area for temporarily storing input data and data such as processing results generated when the control program is executed.

  The reading unit 15 includes a CMOS (Complementary Metal Oxide Semiconductor) image sensor, a CCD (Charge Coupled Device) image sensor, an A / D converter, or the like. The reading unit 15 uses a CMOS image sensor or a CCD image sensor to read a barcode with reflected light of a laser beam irradiated on the barcode to be read, and photoelectrically converts the optical image signal obtained by the reading into an electrical signal (analogue). Signal), the analog signal is converted into a digital signal by an A / D converter, and barcode image data is obtained.

  The gyro sensor 16 includes an acceleration sensor 161 and an inclination sensor 162, and detects the movement state of the reading unit 15 in the three-dimensional space during the barcode reading operation. The acceleration sensor 161 detects the acceleration of the reading unit 15 moved in the three-dimensional space, the time moved, and the direction moved. Based on the information detected by the acceleration sensor 161, the moving distance of the reading unit 15 can be calculated. The tilt sensor 162 detects the tilt of the reading unit 15 caused by the movement of the reading unit 15 in the three-dimensional space. Based on the inclination detected by the inclination sensor 162, the light irradiation angle with respect to the barcode surface can be calculated.

Next, the operation in this embodiment will be described.
First, the barcode reading process executed under the control of the CPU 10 of the barcode reading apparatus 1 will be described with reference to the flowchart of FIG.

  When the trigger key of the input unit 12 is pressed, the reading of the barcode is started by the reading unit 15 at a predetermined scanning speed (for example, 100 scans / second). Image data ”) is acquired (step S1). Each barcode image data acquired for each reading in step S1 is stored in the RAM 14 (step S2).

  Next, correction processing for correcting each barcode image data stored in the RAM 14 in step S2 to barcode image data acquired when read from a preset reference position is performed (step S3). The correction process in step S3 will be described in detail later with reference to FIGS.

  Next, the barcode image data corrected in step S3 is synthesized (step S4). In the synthesis in step S4, for example, by superimposing each barcode image data, the missing bar portion (rubbed portion, lightly printed portion, etc.) in one barcode image data is replaced with other barcode image data. Processing such as compensation is performed.

  Next, barcode decoding processing is performed using the combined barcode image data (step S5). In the decoding process in step S5, the array of white and black bars represented by the barcode image data is converted into data representing an array of numerical values and characters.

  When the decoding process is completed, it is determined whether or not the decoding process can be normally performed in the decoding process of step S5 (step S6). If it is determined in step S6 that decoding could not be performed normally (step S6; NO), if it is before time-out (step S7), the process returns to step S1 and continues the barcode reading operation. .

  In step S6, when it is determined that the decoding can be normally performed (step S6; YES), the decoding processing result is output (for example, displayed on the display unit 11) (step S8), and the barcode reading process is performed. Ends.

  Next, barcode image data correction processing (step S3 in FIG. 2) will be described in detail with reference to the flowchart in FIG. 3 and FIGS.

  In the present embodiment, the barcode image data correction process is actually acquired from the reading unit 15 based on the movement state of the reading unit 15 in the three-dimensional space (xyz) acquired from the gyro sensor 16. In this process, the barcode image data is corrected to barcode image data acquired when the barcode image data is read from a preset reference position. In the following description, it is assumed that the central portion of the barcode surface is the origin O of the orthogonal coordinate system, the direction perpendicular to the barcode surface is the x-axis direction, and the direction in which each bar on the barcode surface is arranged is the y-axis direction.

  In the present embodiment, the movement state in the three-dimensional space of the reading unit 15 acquired from the gyro sensor 16 is classified into the following five types based on the irradiation state from the light source OS of the reading unit 15, and the respective movement states are classified. A corresponding correction process (correction H1 to correction H5) will be described.

[1] A state in which light is irradiated so as to approach the barcode surface β (see FIG. 4);
[2] A state in which light is irradiated away from the barcode surface β (see FIG. 7);
[3] A state in which light is irradiated so as to be inclined with respect to a reference direction (parallel to the x-axis direction) in the xy plane (see FIG. 10);
[4] A state in which light is irradiated so as to move in the bar array direction (y-axis direction) with respect to the barcode surface β (see FIG. 13);
[5] A state in which light is irradiated so that the irradiation line on the barcode surface β is inclined with respect to the bar arrangement direction (y-axis direction) (see FIG. 16).

  Note that the movement state actually detected by the gyro sensor 16 is a combination of the movement states corresponding to the above [1] to [5], but these combined movement states are the above [1] to [1] to [5]. By performing the correction process for each moving state separately in [5], a result equivalent to the correction process for the combined moving state is finally obtained.

  In the barcode image data correction process shown in FIG. 3, first, the movement state of the reading unit 15 is acquired from the gyro sensor 16 (step S20). Then, the moving state is such that light is irradiated so as to approach the barcode surface β as shown in FIG. 4 (moving state [1]) or light is moved away from the barcode surface β as shown in FIG. It is determined whether or not the irradiation state (movement state [2]) is included (step S21).

  If it is determined in step S21 that the movement state acquired from the gyro sensor 16 includes the movement state [1] or the movement state [2] (step S21; YES), the following correction H1 or correction H2 is performed. (Step S22).

[Correction H1]
In the moving state [1] shown in FIG. 4, as the light source OS approaches the barcode surface β, the width of the light irradiation line L on the barcode surface β becomes narrower as shown in FIG. Therefore, as shown in FIG. 5B, the width of each bar actually recognized by the reading unit 15 is larger than the original width shown in FIG. In FIG. 5 (a) and FIG. 5 (b), the “bar width” corresponding to each of white and black is a counter value that represents the width of the bar. The width is 10, the white width is 20, and so on. The same applies to the following FIG. 8, FIG. 11, FIG. 14, and FIG.

The rate at which the bar width increases in accordance with the movement distance of the light source OS of the reading unit 15 varies depending on the characteristics of the scanner module used in the reading unit 15 and is set in advance. For example, as shown in FIG. 6, the bar width acquired by the first reading is B1, the bar width acquired by the second reading is B2, the movement distance of the light source OS acquired from the gyro sensor 16 is ΔD, When the rate at which the bar width becomes thicker according to the movement distance is the correction coefficient f1, the bar width after correction by the correction H1 is expressed as shown in Expression (1).
Bar width after correction = bar width before correction × ΔD × f1 (1)

[Correction H2]
In the moving state [2] shown in FIG. 7, as the light source OS moves away from the barcode surface β, the light irradiation line L on the barcode surface β becomes wider as shown in FIG. Therefore, as shown in FIG. 8B, the width of each bar actually recognized by the reading unit 15 is narrower than the original width shown in FIG.

The rate at which the bar width is reduced according to the moving distance varies depending on the characteristics of the scanner module used in the reading unit 15 and is set in advance. For example, as shown in FIG. 9, the bar width acquired by the first reading is B1, the bar width acquired by the second reading is B2, the movement distance of the light source OS acquired from the gyro sensor 16 is ΔD, When the rate at which the bar width is reduced according to the moving distance is the correction coefficient f2, the bar width after the correction with the correction H2 is expressed as shown in Expression (2).
Bar width after correction = bar width before correction × ΔD × f2 (2)

  In step S21 of FIG. 3, when it is determined that the movement state acquired from the gyro sensor 16 does not include either the movement state [1] or the movement state [2] (step S21; NO), or in step S22 When the correction H1 or the correction H2 ends, the movement state acquired from the gyro sensor 16 is light so as to be inclined with respect to the reference direction (parallel to the x-axis direction) in the xy plane as shown in FIG. It is determined whether the state (moving state [3]) is included (step S23).

  When it is determined in step S23 that the movement state acquired from the gyro sensor 16 includes the movement state [3] (step S23; YES), the following correction H3 is performed (step S24).

[Correction H3]
As shown in FIG. 10, when the light irradiation direction is inclined with respect to the x-axis, the irradiation line L on the barcode surface β shown in FIG. 11A is the bar position (y coordinate value). Depending on the distance from the light source OS. Therefore, in the case of the movement state [3] shown in FIG. 10, the distance from the light source OS becomes closer to the positive direction of the y-axis as shown in FIG. Since the distance from the light source OS increases toward the negative direction of the axis, the bar width becomes narrower.

As shown in FIG. 12, when the light irradiation direction is inclined at an inclination angle Θ with respect to the x axis, the rate at which the bar width changes according to the bar position (y = Bd) is determined by the reading unit 15. It differs depending on the characteristics of the scanner module used, and is preset as a function of the bar position Bd and the inclination angle Θ acquired from the gyro sensor 16. When the rate at which the bar width changes is the correction coefficient f (Bd, Θ), the bar width after the correction with the correction H3 is expressed as in Expression (3).
Bar width after correction = bar width before correction × f (Bd, Θ) (3)

  In step S23 of FIG. 3, when it is determined that the movement state acquired from the gyro sensor 16 does not include the movement state [3] (step S23; NO), or when the correction H3 in step S24 is completed, the gyro sensor As shown in FIG. 13, the movement state acquired from 16 is a state (movement state [4]) in which light is irradiated such that the barcode surface β moves in the bar arrangement direction (y-axis direction). It is determined whether or not it is included (step S25).

  When it is determined in step S25 that the movement state acquired from the gyro sensor 16 includes the movement state [4] (step S25; YES), the following correction H4 is performed (step S26).

[Correction H4]
In the case of the movement state [4] shown in FIG. 13, the irradiation line L on the barcode surface β shown in FIG. 14A moves in the bar arrangement direction, and therefore the barcode start margin recognized by the reading unit 15. The width (or the width of the end margin) changes as shown in FIG. Therefore, in correction H4, the bar code image data acquired by the second reading is used as a reference, the width of the start margin of the bar code image data acquired by the second reading is determined as a bar code having characteristics such as a start code. Correct based on image data.

As shown in FIG. 15, if the counter values up to the first black of the barcode in the first and second readings are c1 and c2, respectively, the width of the start margin is corrected by cx = c1-c2. That's fine. That is, the width of the start margin after correction is expressed as Equation (4).
Width of start margin after correction = width of start margin before correction + cx (4)

  In step S25 of FIG. 3, when it is determined that the movement state acquired from the gyro sensor 16 does not include the movement state [4] (step S25; NO), or when the correction H4 in step S26 is completed, the gyro sensor As shown in FIG. 16, the movement state acquired from 16 is a state in which light is irradiated so that the irradiation line on the barcode surface β is inclined with respect to the bar arrangement direction (y-axis direction) (movement state [ 5]) is included (step S27).

  If it is determined in step S27 that the movement state acquired from the gyro sensor 16 includes the movement state [5] (step S27; YES), the following correction H5 is performed (step S28).

[Correction H5]
In the moving state [5] shown in FIG. 16, as shown in FIG. 17A, the irradiation line L on the barcode surface β is inclined with respect to the bar arrangement direction (y-axis direction). As shown in FIG. 17 (b), the width of each bar is larger than the original width shown in FIG. 17 (a).

For example, as shown in FIG. 18, when the first reading direction is parallel to the bar arrangement direction (bar width B1), and the second reading direction is inclined at an angle θ with respect to the bar arrangement direction, The bar width B obtained by correcting the bar width B2 obtained by the second reading is expressed as shown in Expression (5).
B = B2 · cosθ (5)

  However, in actual reading, since the first reading is not always parallel to the bar arrangement direction as shown in FIG. 18, the first reading is also performed in the bar arrangement direction as shown in FIG. The correction value of the bar width should be calculated including the case where it is inclined. As shown in FIG. 19, the bar width obtained by the first reading is B1, the bar width obtained by the second reading is B2, and the inclination angle obtained from the gyro sensor 16 between the first and second readings. Is θ. In this case, as shown in FIG. 20, in a triangle in which the lengths of the two sides are B1 and B2 and the angle between both sides is θ, the perpendicular line extending from the vertex corresponding to the angle θ to the opposite side (length C) The length B is a bar width correction value.

この三角形の面積は(１／２)Ｂ・Ｃ＝(１／２)Ｂ１・Ｂ２・sinθゆえ、補正後のバー幅Ｂは、式（７）のように算出される。

In the triangle of FIG. 20, the length C is calculated as shown in Equation (6).

Since the area of this triangle is (1/2) B · C = (1/2) B1 · B2 · sinθ, the corrected bar width B is calculated as shown in Equation (7).

  In Step S27 of FIG. 3, when it is determined that the movement state acquired from the gyro sensor 16 does not include the movement state [5] (Step S27; NO), or when the correction H5 in Step S28 is completed, the correction is performed. The bar code image data is stored in the RAM 14 (step S29), and the correction process is completed.

  As described above, according to the barcode reading apparatus 1 of the present embodiment, the barcode image data acquired by the reading unit 15 based on the movement state acquired from the gyro sensor 16 is set to a preset reference position. By correcting the barcode image data when read from the barcode, even a barcode having a defect as shown in FIG. 21 can be correctly combined. Thereby, an accurate reading result can be obtained.

  Note that the description in the present embodiment can be changed as appropriate without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the correction processing when the light source OS moves in the substantially xy plane with respect to the barcode surface β has been described, but in addition to the movement states [1] to [5] described above. When correction processing corresponding to the movement state including movement in the z-axis direction is performed, more precise synthesis processing can be performed.

  In the above-described embodiment, the case where the moving state of the reading unit 15 is detected using the gyro sensor 16 has been described. However, if the moving state in the three-dimensional space can be detected, another sensor is used. May be.

The block diagram which shows the principal part structure of the barcode reader which concerns on embodiment of this invention. 6 is a flowchart showing a barcode reading process executed under the control of the CPU of the barcode reading apparatus according to the embodiment. The flowchart which shows the detail of the correction | amendment process shown in FIG. The figure which shows typically the irradiation state of the light with respect to a barcode surface, Comprising: The figure which shows the state irradiated with light so that a barcode surface may be approached. 5A is a diagram showing barcode image data to be read and a light irradiation line, and FIG. 5B is a diagram showing barcode image data recognized by a reading unit in the irradiation state shown in FIG. The figure for demonstrating the correction method of the bar width in the irradiation state shown in FIG. The figure which shows typically the irradiation state of the light with respect to a barcode surface, Comprising: The figure which shows the state irradiated with light so that it may distance from a barcode surface. The figure (a) which shows the barcode image data and light irradiation line of reading object, and the figure (b) which shows the barcode image data recognized by the reading part in the irradiation state shown in FIG. The figure for demonstrating the correction method of the bar width in the irradiation state shown in FIG. The figure which shows typically the irradiation state of the light with respect to a barcode surface, Comprising: The figure which shows the state irradiated with light so that it may incline from a reference direction (parallel to x-axis direction) in xy plane. FIG. 11A is a diagram showing barcode image data to be read and a light irradiation line, and FIG. 10B is a diagram showing barcode image data recognized by a reading unit in the irradiation state shown in FIG. The figure for demonstrating the correction method of the bar width in the irradiation state shown in FIG. The figure which shows typically the irradiation state of the light with respect to a barcode surface, Comprising: The figure which shows the state irradiated with light so that it may move to a y-axis direction with respect to a barcode surface. The figure which shows the barcode image data and light irradiation line of reading object, and the figure which shows the image data of the barcode recognized by the reading part in the irradiation state shown in FIG. The figure for demonstrating the correction method of the start margin width | variety in the irradiation state shown in FIG. The figure which shows typically the irradiation state of the light with respect to a barcode surface, Comprising: The figure which shows the state irradiated with the light so that the irradiation line on a barcode surface may incline with respect to the arrangement direction (y-axis direction) of a bar . The figure (a) which shows the barcode image data and light irradiation line of reading object, and the figure (b) which shows the barcode image data recognized by the reading part in the irradiation state shown in FIG. The figure for demonstrating the correction method of the bar width in the irradiation state shown in FIG. The figure for demonstrating the correction method of the bar width in the irradiation state shown in FIG. The figure for demonstrating the correction method of the bar width in the irradiation state shown in FIG. The figure which shows an example of the barcode which has a defect. The figure which shows the several irradiation line from which the irradiation position of light differs in the barcode surface shown in FIG.

Explanation of symbols

1 Bar code reader 10 CPU
11 Display unit 12 Input unit 13 Storage unit 14 RAM
15 Reading unit 16 Gyro sensor 161 Acceleration sensor 162 Tilt sensor 18 Power supply unit

Claims (7)

Reading means for reading a barcode a plurality of times and obtaining a plurality of barcode image data;
Storage means for storing the barcode image data acquired by the reading means;
Detecting means for detecting a plurality of movement states of the reading means in a three-dimensional space during the barcode reading operation;
Based on a plurality of movement states in the three-dimensional space detected by the detection means, correction processing corresponding to each movement state is performed, thereby correcting the bar width in each acquired barcode image data . Correction means for correcting each process ;
Combining means for combining the barcode image data corrected by the correcting means to generate combined image data;
Decoding means for decoding the combined image data generated by the combining means;
A barcode reader. The detection means detects the movement state using a gyro sensor,
The barcode reading apparatus according to claim 1, wherein the gyro sensor includes an acceleration sensor that detects an acceleration of the reading unit and an inclination sensor that detects an inclination of the reading unit caused by movement of the reading unit. The detecting means detects either the moving state in which the reading means has moved closer to the barcode or the moving state in which the reading means has moved away from the barcode,
The correction means corrects the barcode image data so that a bar width becomes narrow according to a moving distance of the reading means when the reading means moves so as to approach the barcode, and the reading means The bar code image data is corrected so that the bar width becomes thicker according to the moving distance of the reading unit when the bar is moved away from the bar code surface. Bar code reader. The detection unit detects a moving state in which the reading unit is irradiated with light inclined with respect to the barcode,
The correction means corrects the bar width of the barcode image data in accordance with the inclination angle of the reading means when the reading means irradiates light with an inclination with respect to the barcode. Item 4. The barcode reader according to any one of Items 1 to 3. The detection means detects a movement state in which the reading means moves in the bar arrangement direction with respect to the barcode,
The correction means corrects the width of the start margin of the barcode image data according to the moving distance of the reading means when the reading means moves in the bar arrangement direction with respect to the barcode. The barcode reader according to any one of claims 1 to 4. The detection means detects a movement state in which the reading means is irradiated with light inclined with respect to the bar arrangement direction of the barcode,
When the reading unit irradiates light with an inclination with respect to the bar arrangement direction of the barcode, the correction unit determines the bar width of the barcode image data according to the inclination angle of the reading unit with respect to the bar arrangement direction. The barcode reader according to claim 1, wherein the barcode reader is corrected. Computer
Means for reading a bar code a plurality of times by a reading means and obtaining a plurality of bar code image data;
Means for storing the acquired barcode image data in a storage means;
Means for detecting a plurality of movement states of the reading means in a three-dimensional space during the barcode reading operation;
Based on the detected plurality of movement states in the three-dimensional space, correction processing corresponding to each movement state is performed, thereby correcting the bar width in each acquired barcode image data for each correction processing. Means to
Means for combining the corrected barcode image data to generate combined image data;
Means for decoding the generated composite image data;
Program to function as.

Images