JP2001136348A - Method and device for automatically adjusting image line sensor read start time, recording medium having program for automatically adjusting image line sensor read start time recorded thereon, and recording medium having image data read processing program recorded thereon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently adjust an image line sensor read start time. SOLUTION: In the control part, a carrier roller 5 driven by a carrier motor 10 carries a reference medium, an image sensor drive circuit 8 drives an image line sensor 1 just after an image read start sensor 2 detects the tip of the reference medium, and the output data of the image line sensor are expanded in an image buffer 4 through an image sensor input circuit 9. After that, the black image line number Z is counted from the head line of the image buffer 4 until the tip edge of the reference medium. Subtracting a black image line number Y required to detect the tip edge of the reference medium in image data from the black image line number Z, a line number X is obtained to calculate the image line sensor read start time after the detection of the tip edge of the reference medium, which is stored as a soft parameter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image data reading method, and more particularly to an image line sensor reading start timing automatic adjustment method, an image line sensor reading start timing automatic adjustment device, and a recording storing an image line sensor reading start timing automatic adjustment program. The present invention relates to a medium and a recording medium storing an image data reading processing program.

[0002]

2. Description of the Related Art Conventionally, adjustment of image reading start timing of an image line sensor in an image data reading apparatus is performed by an adjuster visually confirming image data and adjusting software parameters for adjusting image reading start timing. Was.

[0003]

The adjustment of the image reading start timing of the image line sensor in the conventional image data reading apparatus described above is performed by an adjuster who visually checks the image data and adjusts the image line sensor reading start timing. Since the adjustment is performed by adjusting the soft parameters, the adjustment time is very long and the accuracy is low. Therefore, means capable of performing accurate adjustment in a short time has been required.

[0004]

According to a first aspect of the present invention, in a method for automatically adjusting a reading start timing of an image line sensor, a reference medium is conveyed by a conveying roller through a conveying motor (step 1), and the image reading sensor detects the reference medium. Immediately after detecting the leading end of the reference medium (Step 2), the image line sensor is driven by the image sensor driving circuit (Step 3), and the output data of the image line sensor is developed in the image buffer through the image sensor input circuit (Step 4). ). Thereafter, the number Z of black image lines from the leading line of the image buffer to the leading edge of the reference medium is counted (step 5), and the leading edge of the reference medium is detected on the image data from the number Z of black image lines. The number of lines X, which is obtained by subtracting the number of black image lines Y required for the calculation, is calculated (the (number of lines X) × (interval time for reading an image of one line)) to obtain the leading end of the reference medium. The image line sensor reading start time after the edge is detected is calculated and stored as a soft parameter (step 6).

According to a second aspect of the present invention, in the first aspect, the medium is transported by the transport roller through the transport motor (Step 10), and after the medium is detected by the image reading start sensor (Step 11), After the medium has been conveyed until the image sensor reading start time corresponding to the X lines indicated by the soft parameter (step 12), the image line sensor is driven by the image sensor driving circuit (step 1).
3) The output data of the image line sensor is developed in the image buffer through the image sensor input circuit (step 14).

According to a third aspect of the present invention, there is provided an image line sensor reading start automatic adjustment device, wherein a reference medium is transported by a transport roller through a transport motor, and an image reading start sensor detects the leading end of the reference medium immediately after the image line is detected. A sensor is driven by an image sensor driving circuit, and output data of the image line sensor is developed in an image buffer through an image sensor input circuit, and thereafter, the number of black image lines from a head line of the image buffer to a leading edge of the reference medium is counted. Z is counted, and the number X of lines obtained by subtracting the number Y of black image lines required to detect the leading edge of the reference medium on the image data from the number Z of black image lines is calculated (the (number of lines X)). × (interval time to read one line image By performing the calculation) to calculate the image line sensor reading start timing from the detection of the leading edge of the reference medium, characterized in that it comprises a control means for storing the value as a soft parameter.

According to a fourth aspect of the present invention, in the third aspect, the control means conveys the medium by the conveyance roller through the conveyance motor, and detects the medium by the image reading start sensor and indicates the medium by the soft parameter. X
After the medium is conveyed until the reading start time of the image line sensor corresponding to the line, the image line sensor is driven by the image sensor driving circuit, and the output data of the image line sensor is expanded in the image buffer through the image sensor input circuit. It is characterized by doing.

According to a fifth aspect of the present invention, in a data processing apparatus, a reference medium is transported by a transport roller through a transport motor (step 1), and immediately after the leading end of the reference medium is detected by an image reading start sensor (step 2). ),
The image line sensor is driven by the image sensor driving circuit (step 3), and the output data of the image line sensor is developed in the image buffer through the image sensor input circuit (step 4). Thereafter, the number Z of black image lines from the leading line of the image buffer to the leading edge of the reference medium is counted (step 5), and the leading edge of the reference medium is detected on the image data from the number Z of black image lines. The number of lines X, which is obtained by subtracting the number of black image lines Y required for the calculation, is calculated (the (number of lines X) × (interval time for reading an image of one line)) to obtain the leading end of the reference medium. The image line sensor reading start time after the edge is detected is calculated and stored as a software parameter (step 6). The recording medium stores an image line sensor reading start time automatic adjustment program.

According to a sixth aspect of the present invention, in a data processing apparatus, a medium is transported by a transport roller through the transport motor (step 10), and after the medium is detected by an image reading start sensor (step 11), the medium is controlled by software parameters. After the medium has been transported until the reading start time of the image line sensor specified in advance (step 12),
A recording medium storing an image data reading processing program, in which an image line sensor is driven by an image sensor driving circuit (step 13), and output data of the image line sensor is developed in an image buffer through an image sensor input circuit (step 14). It is characterized by the following.

[Operation] Referring to FIG. 1, when image data is read by the image line sensor 1, since the capacity of the image buffer 4 is limited, the physical positional relationship between the image reading start sensor 2 and the image line sensor 1 is determined. Therefore, it is necessary to adjust the image reading start timing in advance so that unnecessary image data that is not necessary for image data recognition is not read. In the past, the image reading start time was adjusted by the coordinator by visually checking the image data and adjusting the soft parameters.In the present invention, the image reading start time is automatically determined from the image data read for adjustment. Since the calculation is performed, the adjustment man-hour and the adjustment time can be reduced.

[0011]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a device diagram of an image reading mechanism according to the present invention, and FIG. 2 is a block diagram showing one embodiment of an image line sensor reading start automatic adjusting device according to the present invention.

Referring to FIG. 1, an image reading mechanism according to the present invention includes an image line sensor 1 for reading an image on a reference medium 3 and an image reading start sensor 2 which is a trigger for starting image reading.
An image buffer 4 for storing image data read by the image line sensor 1, and a transport roller 5 for transporting the reference medium 3 for reading the image.
And 6.

Referring now to FIG. 2, the image line sensor reading start timing automatic adjustment device of the present invention comprises an image sensor driving circuit 8 for driving the image line sensor 1.
An image sensor input circuit 9 for developing output data from the image line sensor 1 in the image buffer 4,
A control unit 7 drives an image sensor drive circuit 8 by using an input of the image reading start sensor 2 as a trigger, and analyzes image data in the image buffer 4.

Next, the operation of the embodiment of the present invention will be described with reference to FIGS.

FIG. 3 is a diagram for explaining the operation of the present invention, and FIG.
FIG. 5 is a processing flowchart at the time of automatic adjustment of the image line sensor reading start timing in the control unit 7 of the present invention, and FIG. 5 is a processing flowchart of the control unit 7 during normal operation after the automatic adjustment of the image line sensor reading start time.

Referring to FIG. 4, first, the reference medium 3 for adjusting the image line sensor reading start timing is supplied to the control unit 7.
Are transported by the transport rollers 5 and 6 through the transport motor 10 (step 1). Immediately after the leading edge of the medium is detected by the image reading start sensor 2 (step 2), the image line sensor 1 is driven by the image sensor drive circuit 8 (step 1). 3) The output data of the image line sensor 1 is developed in the image buffer 4 through the image sensor input circuit 9 (step 4). Thereafter, the number Z of black image lines from the leading line of the image buffer 4 to the leading edge of the medium in FIG. 3 is counted (step 5), and the leading edge of the medium is detected on the image data from the number Z of black image lines. The number of lines X is calculated by subtracting the number of necessary black image lines Y, and then (the number of lines X) × (interval time for reading an image of one line)
By performing the above calculation, the image line sensor reading start timing after detecting the leading edge of the medium is calculated and stored as a soft parameter (step 6).
The number Y of black image lines required to detect the leading edge of the medium on the image data is necessary to ignore the disturbance of the image data caused by the flutter of the leading edge of the medium during conveyance. Number of lines.

Next, referring to FIG. 5, during normal operation after the adjustment, the medium is transported by the transport rollers 5 and 6 through the transport motor 10 (step 10), and after the medium is detected by the image reading start sensor 2 (step 10). Step 11) After the medium has been conveyed until the image line sensor reading start time corresponding to the X lines indicated by the soft parameters (Step 12), the image line sensor 1 is driven by the image sensor driving circuit 8 (Step 13). ),
The output data of the image line sensor 1 is developed in the image buffer 4 through the image sensor input circuit 9 (step 14), and the image data is analyzed (step 14).

As described above, by recognizing the number of lines X, unnecessary image data of the leading end portion is not read, and the recognition time is shortened.

The image line sensor as a constituent element is not limited to the line sensor as long as the image data is output to the image buffer in a format in which the number of lines of the image data can be calculated.

Next, as shown in FIG. 6, even when the image reading start sensor is mounted before and after the image line sensor 1 like the image reading start sensor A11 and the image reading start sensor B12, the conveyance reading direction is not changed. As a result, the image line sensor reading start timing has a soft parameter for each image reading start sensor, so that the image line sensor reading start timing automatic adjustment method of the present invention is applied to each image reading start sensor. This makes it possible to further reduce the number of adjustment steps and the adjustment time.

Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 7, the second embodiment of the present invention includes a recording medium 14 recording an image line sensor reading start automatic adjustment program. This recording medium 10 may be a magnetic disk, a semiconductor memory, or another recording medium.

The image line sensor read start automatic adjustment program is read from the recording medium 14 by the data processing device 13 and controls the operation of the data processing device 13. The data processing device 13 executes the following processing under the control of the image line sensor reading start timing automatic adjustment program.

The reference medium 3 for adjusting the reading start timing of the image line sensor is transported by the transport rollers 5 and 6 from the control unit 7 through the transport motor 10 (step 1), and immediately after the leading edge of the medium is detected by the image reading start sensor 2 (step 1). Step 2) The image line sensor 1 is driven by the image sensor driving circuit 8 (Step 3), and the output data of the image line sensor 1 is developed into the image buffer 4 through the image sensor input circuit 9 (Step 4). Thereafter, the number Z of black image lines from the leading line of the image buffer 4 to the leading edge of the medium is counted (step 5), and it is necessary to detect the leading edge of the medium on the image data from the number Z of black image lines. The number of lines X obtained by subtracting the number Y of black image lines is calculated, and furthermore, the operation of (number of lines X) × (interval time for reading one line of image) is performed to obtain the image after the leading edge of the medium is detected. The line sensor reading start time is calculated and stored as a software parameter (step 6).

Next, a third embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 7, the third embodiment of the present invention includes a recording medium 14 on which an image data reading processing program is recorded. The recording medium 14 may be a magnetic disk, a semiconductor memory, or another recording medium.

The image data reading processing program is read from the recording medium 14 into the data processing device 13 and controls the operation of the data processing device 13. The data processing device 13 executes the following processing under the control of the image data reading processing program.

The medium is transported by the transport rollers 5 and 6 through the transport motor 10 (step 10). After the medium is detected by the image reading start sensor 2 (step 11), an image corresponding to X lines specified in advance by software parameters is obtained. After the medium is conveyed until the line sensor reading start time (step 12), the image line sensor 1 is driven by the image sensor driving circuit 8 (step 1).
3) The output data of the image line sensor 1 is developed in the image buffer 4 through the image sensor input circuit 9 (step 14).

[0030]

As described above, the image line sensor read start timing is automatically calculated from the image data read for adjustment by using the image line sensor read start automatic adjustment method of the present invention. In addition, since the data is stored, it is possible to reduce the number of adjustment steps and the adjustment time.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration example of an image reading mechanism.

FIG. 2 is a block diagram showing an embodiment of an image line sensor reading start automatic adjustment device according to the present invention.

FIG. 3 is an operation explanatory diagram of the present invention.

FIG. 4 is a flowchart at the time of automatic adjustment of the image line sensor reading start timing in the control unit 7 of the present invention.

FIG. 5 is a processing flowchart during normal operation after automatic adjustment of the image line sensor reading start timing in the control unit 7 of the present invention.

FIG. 6 is a diagram illustrating another configuration example of the image reading mechanism.

FIG. 7 is a block diagram showing second and third embodiments of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 image line sensor 2 image reading start sensor 3 reference medium 4 image buffer 5 transport roller 6 transport roller 7 control unit 8 image sensor drive circuit 9 image sensor input circuit 10 transport motor 11 image reading start sensor A 12 image reading start sensor B 13 Data processing device 14 Recording medium

 ──────────────────────────────────────────────────続 き Continuation of the front page (54) [Title of Invention] Automatic adjustment method of image line sensor reading start time, automatic adjustment device for image line sensor reading start time, and recording medium storing image line sensor reading start automatic adjustment program Recording medium storing image data reading processing program

Claims (6)

[Claims] In the method for automatically adjusting the reading start timing of an image line sensor, a reference medium is transported by a transport roller through a transport motor (step 1), and immediately after the leading edge of the reference medium is detected by an image reading start sensor (step 2). Then, the image line sensor is driven by the image sensor driving circuit (step 3), and the output data of the image line sensor is developed in the image buffer through the image sensor input circuit (step 4).
Thereafter, the number Z of black image lines from the leading line of the image buffer to the leading edge of the reference medium is counted (step 5), and the leading edge of the reference medium is detected on the image data from the number Z of black image lines. The number of lines X, which is obtained by subtracting the number of black image lines Y required for the calculation, is calculated (the (number of lines X) × (interval time for reading an image of one line)) to obtain the leading end of the reference medium. A method for automatically adjusting the image line sensor reading start time, comprising calculating an image line sensor reading start time after detecting an edge and storing the calculated time as a software parameter (step 6). 2. The medium is transported by the transport roller through the transport motor (Step 10), and after the medium is detected by the image reading start sensor (Step 1).
1) After the medium has been conveyed until the image sensor reading start time corresponding to the X lines indicated by the soft parameters (step 12), the image line sensor is driven by the image sensor driving circuit (step 13). 2. The method according to claim 1, wherein the output data of the image line sensor is developed in the image buffer through the image sensor input circuit (step 14). 3. An image line sensor reading start automatic adjustment device, wherein a reference medium is transported by a transport roller through a transport motor, and the image line sensor is driven by an image sensor drive circuit immediately after the image reading start sensor detects the leading end of the reference medium. And outputs the output data of the image line sensor to an image buffer through an image sensor input circuit. Thereafter, the number Z of black image lines from the leading line of the image buffer to the leading edge of the reference medium is counted, and The number of lines X is calculated by subtracting the number of black image lines Y required to detect the leading edge of the reference medium from the image data from the number of image lines Z (the (number of lines X) × (image of one line) To calculate the interval time) Image line sensor reading start timing automatic adjusting device, characterized in that it comprises a control means for storing and calculating the image line sensor reading start timing from the detection of the more leading edge of the reference medium this value as a soft parameter. 4. The image forming apparatus according to claim 1, wherein the control unit conveys the medium by the conveyance roller through the conveyance motor, and starts reading an image line sensor corresponding to the X line indicated by the soft parameter after detecting the medium by the image reading start sensor. 4. The image sensor according to claim 3, wherein the image sensor is driven by the image sensor driving circuit, and output data of the image line sensor is developed in the image buffer through the image sensor input circuit after the medium is conveyed until the time. Automatic adjustment device for image line sensor reading start time. 5. A data processing device in which a reference medium is transported by a transport roller through a transport motor (step 1).
Immediately after the leading edge of the reference medium is detected by the image reading start sensor (step 2), the image line sensor is driven by the image sensor driving circuit (step 3), and the output data of the image line sensor is transferred to the image buffer through the image sensor input circuit. (Step 4). Thereafter, the number Z of black image lines from the leading line of the image buffer to the leading edge of the reference medium is counted (step 5), and the leading edge of the reference medium is detected on the image data from the number Z of black image lines. The number of lines X is calculated by subtracting the number of black image lines Y required for the calculation (the above (number of lines X)
X (interval time for reading one line of image)) to calculate the image line sensor reading start time after detecting the leading edge of the reference medium and store it as a software parameter (step 6). A recording medium storing a line sensor reading start time automatic adjustment program. 6. A medium is transported by a transport roller through the transport motor in the data processing device (step 1).
0), after the medium is detected by the image reading start sensor (step 11), after the medium is conveyed until the image line sensor reading start time specified in advance by the software parameter (step 12), the image line sensor is driven by the image sensor driving circuit. (Step 13), and develops the output data of the image line sensor into an image buffer through an image sensor input circuit (Step 14). A recording medium storing an image data reading processing program.