JPS62293874A - Manually drive type picture reader - Google Patents

Abstract

PURPOSE:To improve a multifunction and an operability by providing a signal processing means for processing a reading signal according to a designated signal processing mode. CONSTITUTION:An image sensor 2 performs a main scanning by a drive circuit 1, an output signal, the output signal is corrected in shading in a circuit 3, thereafter, transmitted to a binarization circuit 4 through a mode changeover switch 6. Binarization picture information is written in the semiconductor memory of a memory unit 8 through a mode changeover switch 7. When an original 9 is a photograph or the like, the switches 6 and 7 are changed over to a half tone processing circuit 5 side by operating a knob 13. Thereby, the output of the image sensor 2 has a half tone porcessing applied, thereafter stored to the memory. Thus, since the binarization processing and the half tone processing can be selectively used, the picture of a character, a graphic or the like as well as the picture of the photograph or the like can be inputted.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a hand-driven image reading device that is multi-functional and has improved operability.

[Conventional technology]

As a conventional hand-driven image reading device,
There is a device shown in Japanese Patent No. 5773, which has an optical system, an image sensor, and a memory built into a casing that can be held in hand, and reads the image with the image sensor while moving these over the document (i.e., sub-scanning). , so that it is stored in memory. This memory is built into the device,
Alternatively, it is detachably attached, and the image information stored in the memory can be read out as needed, and the recording can be reproduced by printing on the printing section.

[Problem that the invention seeks to solve]

However, conventional hand-driven image reading devices read in a single reading mode (resolution, magnification, gradation, etc.) regardless of the type of document, so the reproduced record is based on the user's request. It wasn't quite satisfying.

[Means for solving problems]

The present invention has been made in view of the above, and in order to fully satisfy the user's requirements, in addition to gradation mode, resolution change, reduction/enlargement, remaining memory capacity display and operation status display functions are provided. In this way, a hand-driven image reading device is provided that is multi-functional and has improved operability.

〔Example〕

Hereinafter, a hand-driven image reading device according to the present invention will be described in detail. ' Fig. 1 shows an embodiment of the present invention that enables multi-gradation reading of photographs, paintings, etc., and includes an image sensor driving circuit &fl 1 that drives and controls an image sensor 2 that reads images through an optical system; Original under the drive of the circuit 1! 1, a long contact type image sensor 2 that reads the image on the image sensor 1, and a shading correction circuit 3 that corrects variations in the light source and the sensor 2.
, a binarization circuit 4 that binarizes the image information output from the circuit 3, a halftone processing circuit 5 that performs halftone processing on photographs, etc., and an output of the shading correction circuit 3 according to the content of the document. a mode selector switch 6 that selectively outputs output No. 13 of circuit 4 or 5 to circuit 4 or 5; a mode selector switch 7 that outputs output No. 13 of circuit 4 or 5 to memory unit 8 in conjunction with switch 6; It is composed of a memory unit 8 that stores image signals to be processed.

FIG. 2 is a perspective view showing the external appearance of the embodiment shown in FIG. 1, and includes a main body 10 of the device that incorporates an optical system including a light source and an image sensor, a memory unit 11 that is detachably attached to the main body 10, A switch 6 provided on the side of the device main body 10
and a switch 7 in conjunction with a knob 13. As shown in FIG. 3, the knob 13 is engraved with, for example, ``rotation'' and ``letter'' so that it can be switched depending on the content of the document.

In the above configuration, if the manuscript 9 is characters or figures,
Before scanning, the knob 13 is pushed to the "character" side in advance, and the apparatus main body 10 is placed on the reading surface of the original 9 at -◇;;;. By pressing the start button and moving the apparatus main body 10 in hand, images are sequentially read.

The image sensor 2 is main scanned by a drive circuit 1, and its output signal is subjected to shading correction by a circuit 3 and then sent to a binarization circuit 4 via a mode 1ζ switch 6. The binarized image information is written into the semiconductor memory of the memory unit 8 via the mode changeover switch 7. If manuscript 9 is true, etc.,
Operate the knob 13 to switch the switches 6 and 7 to the halftone processing circuit 5 side.

As a result, the output of the image sensor 2 is subjected to halftone processing and then stored in the memory.

In this way, since the binarization process and the halftone processing circuit can be selectively used, in addition to inputting images such as characters and figures, it is possible to manually input images such as photographs.

FIG. 4 shows a second embodiment of the present invention, in which the same reference numerals are used for the same parts as in FIG. 1r to generate a signal? .

A detector 14, a resolution changing circuit 15 that changes the resolution based on the number of output pulses per unit time of the detector 14, a mode changeover switch 16 that outputs a command to change the resolution, and an image sensor. 2, an address generating circuit 18 that determines an address for the memory based on the output signal of the resolution changing circuit 15, and a Δ/D converter 17.
+14 is formed by a serial-parallel register 19 which serially inputs the output signal of and outputs the data of the number of dots based on the data launch clock outputted from the resolution changing circuit 15 to the memory unit 8 in parallel.

FIG. 5 shows the details of the resolution changing circuit 15, and shows the position detection '
27. A doubling circuit 151 that doubles the pulse signal output from the position detector 14, a divide-by-2 circuit 152 that divides the pulse signal output from the position detector 14 in half, and a drive f)
2 frequency divider circuit 15 that divides the output signal of 1 circuit 1 into 172
3, a 4-divider circuit 154 that divides the output signal of the drive circuit 1 into 174, and circuits 151, 152 and 153, 154.
The mode changeover switch 155 selectively outputs one of the following.

In the above configuration, when the main body 10 of the apparatus is moved over the document 9, a number of pulse signals corresponding to the moving distance are generated from the position detection value 14. From image sensor 2,
Image data Si (shaded area) shown in FIG. 6 is output.

On the other hand, the output pulses of the position detector 14 are pulses CL1, CL2, CLI, which are directly, doubled or divided by 2.
It is applied to each terminal of the mode changeover switch 7 as a signal. One of these is serially used as a position detection pulse signal.
It is output to the parallel register 19. In addition, drive circuit 1
The output pulse is applied to a predetermined terminal of the mode changeover switch 7 either directly or as a pulse whose frequency has been multiplied by 2 or divided by 2.

The position detection signal CL functions as a timing pulse to input the output of the image sensor 2 into the serial-parallel register 19. If a pulse is generated for each output of the image sensor 2 (assumed to have a resolution of 16 dots/+n) like the clock CLI shown in FIG.
It is stored in the memory unit 8 with a resolution of at/am. Furthermore, if the pulses are thinned out to 172 as in clock CL□, a resolution of 8 dots/am can be obtained, and if the pulses are further thinned out to 1/4 as in clock CL3, the resolution is 4 dots/am.
Image data is stored with a resolution of dat/am.

In actual use, the image sensor 2 has 16 dots.
/am resolution, normally outputs 8 pulses/dragon position detection pulses and uses them at 8 dots/am (main scan). If high image quality is required, 16 dat/
Switch the mode selector switch 7 to s- (in this case,
16 pulses/+11 position detection pulses are applied to the serial-parallel register 19). Further, when the memory capacity is kept constant, if it is desired to widen the image reading area with a low N1 quadrant, it is switched to 4 dots/am (at this time, the position detection pulse is set to 4 pulses/am).

If 2 L'JN of the memory unit 8 is 1 at 8 dots/height, it corresponds to ]/4 at 16 doL/mm, and corresponds to 4 times at 4 dots/m-.

In this way, the required resolution can be easily set according to the type of document. Furthermore, by setting the low resolution mode, it is possible to widen the image reading area when the memory capacity is kept constant.

The mode switching switch 155 is as shown in FIG.
The operating section is attached to the side surface of the device main body 10 so that it is exposed. As shown in Figure 8, the character stamp on the operation section is ``
Displays such as ``High quality'', ``Standard'', and ``Large capacity'' are designed to make it easy to operate according to the content.

FIG. 9 shows a third embodiment of the present invention that enables reduction and enlargement. The same reference numerals are used for the same parts as in each of the above embodiments, and therefore, redundant explanation will be omitted. In this embodiment, the shape correction circuit 3 (or the halftone processing circuit h'3
) scaling factor processing circuit 20 that scales down the output of ) according to the scaling factor.
, a reduction ratio selection switch 21 that sets the reduction ratio and magnification, a CPU 22 that controls the reduction ratio processing circuit according to the contents specified by the switch 21, and displays the set text on the display 23; Magnification selection switch 21
It is composed of a reduction ratio display 23 that displays the contents set in .

FIG. 10 shows the appearance of the embodiment according to FIG.
3 is disposed, for example, at an easily visible position on the front, and the reduction ratio selection switch 21 is disposed, for example, on the side. As shown in FIG. 11, the switch 21 displays the contents of the reduction ratio setting.

In the configuration shown in FIG. 9, the operator sets the magnification mode by operating the switch 21 before starting scanning. C.P.
U22 displays the magnification input from the switch 21 on the display 2.
3 and supplies the reduction ratio data to the reduction ratio processing circuit 20. The reduction ratio processing circuit 20 performs any one of reduction, same-size, and enlargement processing on the image data from the shading correction circuit 3 based on data from the CPU 22 . For example, in the case of a 70% reduction process, the reduction ratio processing circuit 20 executes a process of thinning out 30 bits from 100 bits of image data. Also, for example, 115%
In the case of the enlargement process, 100 bits are increased to 115 bits, and this is stored in the memory unit 8.

FIG. 12 shows a modification of the embodiment shown in FIG. 9, in which the reduction ratio is set optically. For this purpose, C
It is comprised of a motor control circuit 24 that drives a motor 25 based on the reduction ratio data output from the PU 22, and the motor 25 that is controlled on and off by the circuit 24.

As shown in FIG.
The image sensor 2 is attached to a zoom lens 26 disposed between the image sensor 2 (the reference surface) and the image sensor 2, and its zoom ratio is varied. still,
In the figure, 27 is a light source.

In the configurations shown in FIGS. 12 and 13, when the CPU 22 outputs the magnification data, the motor control circuit 24 rotates the motor 25 in accordance with the magnification to set the zoom ratio of the zoom lens 26 to a desired value. Set.

FIG. 14 shows a fourth embodiment of the present invention in which the reading start can be displayed, and includes a reading start switch 28 that outputs a "readable" or "standby" command in response to an on-operation, and the switch 28 A resistor 29 connected between the 1- side of the switch 28 and the power supply Vce, a signal generating circuit 30 that generates a start signal or a stop signal according to a change in the hot end terminal voltage of the switch 28, and a signal generating circuit 30 that divides the output terminal voltage of the circuit 30. resistors 31 and 32 that apply voltage, a transistor 33a that performs switching operation using the voltage generated at the voltage dividing point as a bias voltage, and an LED connected to the collector of the transistor 33a.
341, and a current adjustment resistor 35a connected between the anode of the LED 34a and the power supply Vce.

In the above configuration, the operator turns on the reading start switch 28 when inputting an image. This operation generates an H level voltage from the signal generating circuit 30, and the voltage obtained by dividing this voltage by the resistors 31 and 32 turns on the transistor 33a. When the transistor 33a is turned on, the LED 34a lights up to indicate that reading is about to start. The output of the signal generation circuit 30 is simultaneously supplied to the system as a reading start signal and used as a start signal. Incidentally, by turning on the switch 28 again,
L[ED34a is turned off and returned to standby state.

FIG. 15 shows a fifth embodiment of the present invention in which it is possible to display the end of reading, in which address generation counters 181, 182, and 183 generate address signals for the memory unit based on the address count clock.
(corresponding to the address generation circuit shown in FIG.
A flip-flop 37 that changes the level between the output terminals from the L level to the 11 level when changing from the L level to the L level, and the same 11 ED drive circuit (not shown in FIG. 14).
! It is constructed by adding the following circuits (transistor 33b, LED 34b, and resistor 35b).

In the configuration shown in FIG. 15, counters 181 to 183 count clocks, and when all output terminals of counters 181 to 183 become H level (that is, all of the memory is used), NAND gate 36 outputs Generate a signal. This signal causes the flip-flop 370Q terminal to change from L level to 1 level. The output of the flip-flop 37 (No. 3 makes the transistor 33b conductive, and the LED 3/lb lights up.

In this state, the reading start switch 2 shown in FIG.
8 is turned on, the LED 34b goes out and returns to the initial state.

As described above, the LIED 34a indicates the start of reading, and the LED 34b indicates the end of reading. L
Reading is in progress from when the ED 34a lights up until when the LED 34b lights up.

Therefore, three modes can be known from the operating states of the two LEDs.

FIG. 16 shows a sixth embodiment of the present invention in which the remaining amount of memory can be displayed, and the same reference numerals are used for the same components as those shown in the previous embodiments, so explanations will be redundant. Although omitted, the amplifier 38 that amplifies the analog image data of the image sensor 2, the reference voltage Vs and the amplifier 38
a comparator 39 that compares the output signals of the image sensor f2 and binarizes the output of the image sensor f2, and a movement distance detector 4 that generates a pulse signal in accordance with the movement of the hand-driven image reading device.
0, a counter 41 for counting pulse signals from the detector 37, and a display means 42 for displaying the counter value of the counter 41 as the remaining memory capacity. The display provided in the display means 42 is provided at a position where it can be easily seen, similar to the magnification ratio display 23 shown in FIG.

In the above configuration, the image information read by the image sensor 2 is binarized, and then the moving distance detector 4
It is written into the memory unit 8 in synchronization with the zero output pulse. On the other hand, the output pulses of the moving distance detector 40 are counted by a counter 41, and the count value is displayed on two displays by a display means 42 as the remaining memory capacity.

The operator can perform image reading efficiently and wastefully by manually performing image reading while checking the remaining memory capacity.

In the configuration shown in Figure 16, the display is L[ED
A half-graph display, a 7-segment digital display, and an analog meter display after D/A conversion can be used.

〔Effect of the invention〕

As explained above, the hand-driven image reading device of the present invention has multiple functions and improved operability comparable to that of a stationary type, so it can be used for many purposes, and the hand-driven image reading device can be put to practical use. can improve sex.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention, FIG. 2 is a perspective view showing the external appearance of the embodiment shown in FIG. 1, and FIG. 3 is a front view showing details of the knob 13 shown in FIG. 2. , FIG. 4 is a block diagram showing a second embodiment of the present invention, FIG. 5 is a block diagram showing details of the resolution changing circuit 15 shown in FIG. 4, and FIG. 6 is a block diagram showing the operation of the embodiment shown in FIG. 4. 7 is a perspective view showing the external appearance of the embodiment shown in FIG. A block diagram showing the embodiment of No. 4, FIG.
11 is a front view of the switch 17 shown in FIG. 10, FIG. 12 is a perspective view showing a modification of the embodiment shown in FIG. 9, and FIG. FIG. 12 is a front view showing the optical system of the embodiment; FIG. 14 is a circuit diagram showing the fourth embodiment of the invention; FIG. 15 is a circuit diagram showing the fifth embodiment of the invention; The figure is a block diagram showing a sixth embodiment of the present invention. Explanation of symbols l−・−・−・・−・Image sensor drive circuit 2−・・
...-1--Image sensor 3---1--
Sheet kneading correction circuit 4-...--2
Value converting circuit 5...-- Halftone processing circuit 6.7--
・−・−Mode selector switch 8・・・・・・・・・・−
/ -F-IJ unit. 10・-・・・・・・Device main body 14・・・・・・・・Position detector 15・−・−・
-Resolution change circuit 18--Address generation circuit 19--Serial-Parallel register 20--1 reduction magnification processing circuit 21--
・−・−・・−Reduction ratio selection switch 22−・・−−−−
---CPU 23...
...Display 24-----Motor control circuit
25...---Motor 26--
～・−Zoom lens 28−・−・−・Reading start switch 30・・・・
--Signal generation circuits 33a, 33b--
...-...Transistors 34a, 34b...
・・−・−・・LED 3G−・・・・・・・・・・−
NAFJD gate 37...--Flip-flop 40--Moving distance detector
41−・−・−・−・Counter 42・・・・・・−・
- Display means Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 7 Fig. 8 Fig. 9 Fig. 10 Fig. 11 Fig. 12 Fig. f Fig. 13 Fig. 14 Fig. 15 Fig. 16

Claims (5)

[Claims] (1) In a hand-driven image reading device that processes a read signal read by moving over a document to generate an image signal according to the content of the document, and stores this image signal in a memory, the read signal is specified. What is claimed is: 1. A hand-driven image reading device, comprising a signal processing control means for processing according to a signal processing mode. (2) The hand-driven image reading device according to claim 1, wherein the signal processing control means switches to a binary signal processing mode or a multi-level signal processing mode depending on the content of the document. (3) The hand-driven image reading device according to claim 1, wherein the signal processing control means switches the resolution depending on the content of the document. (4) The hand-driven image reading device according to claim 1, wherein the signal processing control means monitors the state of the memory and controls signal processing. (5) The signal processing control means monitors the remaining amount of storage area of the memory, implementation and completion of memory operations, and whether or not information can be written as the state of the memory.
The hand-driven image reading device described in Section 1.