JPH0748791B2 - Image input processor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention is designed to optically read data by manually sweeping an image sensor unit along a data surface on which data such as characters and images are written. The present invention relates to an image input processing device.

<Prior Art> An image input processing device of this type is generally provided with a device such as a rotary encoder that detects a movement amount.
When the movement amount detecting device detects the movement by the manual operation of the image sensor unit, the data reading unit is driven to start the data reading operation, and the read data is made to correspond to the detection position by the movement amount detecting device. It is designed to be stored in memory.

<Problems to be Solved by the Invention> In the meantime, the above-described movement amount detection device has extremely high resolution accuracy in order to improve its detection capability. Therefore, the input device, that is, the movement amount detection device that has a slight movement that the operator intends to keep the sensor unit stationary at the time of starting the sweep with the image sensor unit held on the data surface, has high resolution accuracy. However, there is a problem that the data reading operation is started and unnecessary data is input.

<Objects of the Invention> The present invention has been made in view of the above conventional problems, and it is possible to input read data only when the moving speed of the image sensor unit to be manually swept exceeds a certain speed. It is an object of the present invention to provide an image input processing device which excludes unnecessary data input.

<Means for Solving Problems> In order to achieve the above object, the image input processing device of the present invention includes an image sensor unit for manually sweeping a data surface, and a number of units corresponding to the movement amount of the sensor unit. A movement amount detection unit that outputs a detection pulse, a data reading unit that optically reads and outputs data on the data surface in synchronization with the output of the detection pulse, a counting unit that counts the detection pulse, and a fixed time And a time-counting / resetting means for resetting the counting means only when a predetermined number of the pulses are not output within the fixed time period,
A writing control unit that outputs a writing command signal when the count of the counting unit reaches a set value within the certain time without being reset by the time counting / resetting unit, and the data reading when the writing command signal is not input. A control unit for preventing storage of read data from the storage unit in the memory, and for controlling to store the read data from the data reading unit in the memory from the time when the write command signal from the write control unit is input; It is characterized by comprising.

<Operation> When the image sensor unit is held by hand and aligned with the data reading start position on the data surface, even if the image sensor unit moves slightly, the movement amount detection unit detects this and a detection pulse is output. , This detection pulse is not output continuously. This detection pulse does not reach a predetermined number while the time measurement / reset means measures a certain time, so that the count number of the counter for counting the detection pulse, for example, the count / reset means terminates the time measurement of the predetermined time. Since it is reset every time, it does not reach the set value of the write control unit and the write command signal is not output from the write control unit, so unnecessary data read by the data reading unit is not stored in the memory. . When a manual sweep of the image sensor section is started, a predetermined number of detection pulses are detected before the timekeeping / reset manual operation finishes measuring a fixed time. By detecting the movement as above and not resetting the counter, the count value of the counter reaches the set value of the write control unit within a certain time, and the control unit receives the write command signal from the write control unit. Read data from the data reading unit is stored in the memory and stored.

<Examples> Hereinafter, preferred examples of the present invention will be described in detail with reference to the drawings.

First, the outline of the image input processing apparatus of the present invention will be described. As shown in FIG. 2, an image sensor unit 1 serving as a data input unit by a manual sweep for gripping and moving along a data surface, and this image sensor. A printer unit 2 for printing the data read and input by the unit 1. The image sensor unit 1 includes a data reading unit that optically reads data written on the data surface, and a movement amount detection unit that outputs a detection pulse as the image sensor unit 1 moves on the data surface. ing.

As shown in FIG. 3, the movement amount detecting portion is attached to the lower end portion of the main body case 1a of the image sensor portion 1 with the detection pulley 3a being exposed slightly below the main body case 1a. With the movement of 1, the detection pulley 3a rolls on the data surface. The rotation of the detection pulley 3a is transmitted to the transmission pulley 3c by the belt 3b. , Are fixed coaxially so as to rotate integrally. Further, the rotation detecting plate 3d is provided with a photo interrupter 3e for detecting a slit and outputting a detection signal, and the pitch of the slit is made small to set high resolution accuracy.

Next, in FIG. 1 showing an embodiment of the present invention, the movement amount detection unit 3 is the same as that described in FIG. Then, the data reading unit 4 built in the image sensor unit 1 together with the movement amount detection unit 3 emits light in synchronization with the detection pulse of the movement amount detection unit 3 to data such as characters and images written on the paper. The light emitting unit 4a for irradiating, and the light receiving unit 4b for receiving the reflected light corresponding to the data with respect to the light projected from the light emitting unit 4a and reading the data.

The detection signal output from the movement amount detection unit 3 is waveform-shaped into a pulse signal by the waveform shaping circuit 5, and this detection pulse signal is input to the reset terminal R of the integration circuit 6. The moving speed detection unit 6 inputs the clock pulse having a constant pitch output from the pulse generator 7 from the input terminal I and integrates it, and when the integrated value becomes a certain value or more, the moving speed detection unit 6 outputs the clock pulse to the reset terminal R of the counter 8. A reset signal is output.
Further, the reset signal output from the integrating circuit 6 is input again to the reset terminal R of the integrating circuit 6 after the elapse of a certain delay time by the delay circuit 9. The counter 8 counts the detection pulse output from the waveform shaping circuit 5 at a count input terminal I
Then, the count signal is fetched from the counter, and the count signal is output to the write control unit 10 including a comparison circuit.

The writing control unit 10 compares the count signal of the counter 8 with the movement amount setting signal stored in the setting device 11, and when the count signal becomes larger than the setting signal, sends a writing command signal to the central processing unit 12. Output. The central processing unit 12 performs various signal processing according to a program stored in the read-only memory (ROM) 13,
The light emitting unit 4a is driven to emit light in synchronization with the detection pulse signal output from the waveform shaping circuit 5, and the data read signal output from the light receiving unit 4b is fetched by the input of the write command signal from the write control unit 10 to store the data. The read data is printed out from the printing unit 15 of the printer 2 described above.

Next, the operation of the above-described embodiment will be described. When the image sensor unit 1 moves slightly when the image sensor unit 1 is gripped and aligned with the reading start position of the data surface to be read, the movement amount is detected accordingly. Pulley 3a for detecting part 3
Is rotated, and a detection signal is output from the photo interrupter 3e by the slit of the rotation detection plate 3d that rotates integrally with this,
This is converted into a detection pulse signal by the waveform shaping circuit 5, and the integrating circuit 6 is reset each time the detection pulse signal is output.

Since the detection pulse signal at this time is not output continuously because it is not in the sweep state and becomes an intermittent output, until the integrating circuit 6 is reset by this detection pulse signal and is subsequently reset by the detection pulse signal. During this period, the integrated value of the integrating circuit 6 for integrating the output clock pulse of the pulse generator 7 becomes a certain value or more, and the reset signal output from the integrating circuit 6 resets the counter 8 and the memory 14 and delays the delay. The integration circuit 6 itself is reset after a lapse of time. Therefore, the count number of the counter 8 that counts the detection pulse signal does not exceed the set value of the setting device 11, and therefore the write command signal is not output from the write control unit 10 and the light receiving unit of the data reading unit 4 is not output. The read data from 4b is blocked by the central processing unit 12 and is not stored in the memory 14. That is, after the integration circuit 6 is reset by the detection pulse signal, the moving speed detection unit 6
Unless the integration circuit 6 is reset by the detection pulse signal during the time until the integrated value of reaches a predetermined value, that is, unless the image sensor unit 1 is moved at a predetermined speed, the reset signal is intermittently output from the integration circuit 6. Each time it is output, the counter 8 is reset. In other words, the storage of read data in the memory 14 is blocked unless the image sensor unit 3 is moved at a predetermined moving speed or higher and is moved for a predetermined distance or longer.

Then, when the manual sweep operation of the image sensor unit 1 is started, a detection signal is continuously output from the movement amount detection unit 3 as the image sensor unit 1 moves, and the moving speed of the image sensor unit 1 is changed. When it becomes a certain value or more, the generation interval of the detection pulse signal becomes shorter than the time until the integrated value reaches a certain value in the integrating circuit 6, and the reset signal is not output from the integrating circuit 6. As a result, it is detected that the moving speed of the image sensor unit 1 has reached a certain level or more.

When the reset signal is not output from the integration circuit 6 in this way, the counter 8 continuously counts the detection pulse signal because it is not reset, and the count value becomes equal to or more than the set value, and the write control unit 10 issues the write command. A signal is output, and the central processing unit 12 performs signal processing to temporarily store the read data from the light receiving unit 4b in the memory 14. As a result, the memory 14 for unnecessary read data when the moving speed of the image sensor unit 1 reaches a certain speed or more and when the angle is not stable 14
Is blocking the memory of.

FIG. 4 shows another embodiment of the present invention, in which the same or equivalent parts as those in FIGS. 1 to 3 are designated by the same reference numerals. The counter 16 that counts the detection pulse signals output from the waveform shaping circuit 5 has a central processing unit 17 when counting a predetermined number, for example, “2”,
A signal is output to each of a reset terminal R of a timer 18 including a timer circuit and a set terminal S of a write control unit 19 including a flip-flop. The write control unit 19 performs central processing when no signal is output from the counter 16. A reset signal input from the device 17 to the reset terminal R causes a reset state, and a signal input to the set terminal S causes a set state to output a write command signal to the memory 14 including RAM. Further, the timer 18 receives the output signal of the counter 16 and is reset by being input to the reset terminal R, outputs a reset signal to the reset terminal R of the counter 16 by measuring a constant timer time, and has its own reset terminal. The reset signal is also input to R, and the state is reset again.

Therefore, in the state immediately before the manual sweeping operation of the image sensor unit 1 is started, the detection pulse signal from the movement amount detection unit 3 is intermittently output, and the count of the counter 16 that counts this detection pulse signal is counted. Before the number becomes "2", the timer 18
The counter 16 is reset by the reset signal output from the counter 16, and the counter 16 counts "2".
Signal is not output due to not reaching
Since 19 remains in the reset state, the read data from the light receiving section 4b is not written in the memory 14.

Then, when the manual sweep operation of the image sensor unit 1 is started, the detection pulse signal is continuously output from the movement amount detection unit 3, and when the movement speed becomes a certain value or more, the counter 16
Has reached "2" before the reset signal is output from the timer 18, and the write control unit 19 is set by the output signal of the counter 16 and at the same time the data read start signal is input to the central processing unit 17. To be done. The memory 14 becomes writable by the write command signal output from the write control unit 19 in the set state, and the read data from the light receiving unit 4b is fetched and sequentially stored at a predetermined address. Also in this embodiment, since the reading data read-in prohibition time is provided by setting the input of two pulses to the counter 16 within the timer time of the timer 18, a slight movement of the image sensor unit 1 immediately before the manual sweep is performed. It is possible to prevent unnecessary reading data from being stored in the memory 14 at the time and immediately after the manual sweep in which the moving state does not reach a certain moving speed and the moving state is not stable.

<Effects of the Invention> As described in detail above, according to the image input processing apparatus of the present invention, the counter counts the detection pulses output from the movement amount detection unit as the image sensor unit moves, and Until the moving speed reaches a certain level, the counter is reset by the clock / reset means, and if the count value of this counter does not reach the set value, the write command signal is not output from the write control unit. The control unit prevents writing of read data from the data reading unit to the memory,
When the image sensor unit has moved a certain distance at a predetermined moving speed, the write command signal is output and read when the count value of the detection pulse of the counter reaches the set value by the time counting or resetting operation by the time counting / resetting means. Since it is configured to capture and store data in memory,
When the image sensor unit is manually swept with a high-resolution movement amount detection unit, the read data due to a slight movement when the image sensor unit is placed at the reading start position, and the movement state and angle of the image sensor unit are stable. It is possible to prevent unnecessary read data from being stored in the memory during the movement until the movement speed reaches the predetermined movement speed.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of an image input processing apparatus of the present invention, FIGS. 2 and 3 are perspective views of the entire configuration of FIG. 1 and a perspective view of a movement amount detector, respectively. FIG. 6 is a block diagram of another embodiment of the present invention. 1 ... Image sensor unit 3 ... Moving amount detection unit 4 ... Data reading unit 6 ... Integration circuit 18 ... Timer 8, 16 ... Counter 10, 19 ... Writing control unit 12, 17 ... Central processing unit (Controller) 14 …… Memory

Claims (1)

[Claims] 1. An image sensor unit for manually sweeping a data surface, a movement amount detection unit for outputting a number of detection pulses corresponding to the movement amount of the sensor unit, and a data surface of the data surface synchronized with the output of the detection pulse. A data reading section for optically reading and outputting data, a counting means for counting the detection pulses, and a fixed time are repeatedly measured, and only when a predetermined number of the pulses are not output within the fixed time. Clocking / resetting means for resetting the counting means,
A writing control unit that outputs a writing command signal when the count of the counting unit reaches a set value within the certain time without being reset by the time counting / resetting unit, and the data reading when the writing command signal is not input. A control unit for preventing storage of read data from the storage unit in the memory, and for controlling to store the read data from the data reading unit in the memory from the time when the write command signal from the write control unit is input; An image input processing device comprising: