JPS6215964A - Picture reader - Google Patents

Abstract

PURPOSE:To print a picture on a transferred face with fidelity by moving manually a holder on a transferred face in a direction orthogonal to a direction corresponding to the self scanning of an image sensor, repeating the detection at a prescribed period and reading the picture to detect the rotation speed of a wheel of a rotary detector. CONSTITUTION:When a switch 21 is turned on, a holder main body 1 is moved to calculate data of elements No.1-No.n and the period of each pulse of an image sensor 8 while either of Hall ICs 17, 17' generates a pulse, and the result is stored in a RAM. When the holder main body 1 is stopped and no pulse is generated, the correction of each coordinate is calculated at each self scanning line, restored in a storage device and the picture based on the result is displayed on a display (DIS) device. In using a touch sensor (T.S) to desigmate the change in the arrangement of the picture, the arrangement is changed and displayed on the display device (DIS). In using the touch sensor (T.S) to designate print start, the content of the displayed picture is printed out by a printer (PR).

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an image reading device for optically reading characters and images from the surface of a printed matter and reproducing the same.

(Prior art and its problems) In order to read an image in a facsimile machine, etc., an image sensor self-scans the exposure light reflected from the subject surface in one direction along the subject surface, and then In many cases, exposure over the entire object surface is detected by repeating the self-scanning while moving the object surface at a constant speed in a direction perpendicular to the self-scanning direction. However, these paper feeding mechanisms are automated with high precision, and are not suitable for partially reading thick sheets of paper such as books.

(Means for Solving the Problems and Their Effects) The present invention provides an arrangement in which an intermediate holder with an image sensor attached thereto is provided with wheels, and the holder is configured to move the object in a direction perpendicular to the direction corresponding to the self-scanning of the image sensor. When the wheel is manually moved over the surface, the self-scanning detection of the image sensor is repeated at a predetermined period during the movement so that the image is read, and the rotation speed of the wheel is detected by the rotation detector. The data is detected during the movement, and the data corresponding to each self-scanning is detected in response to the difference in the moving speed of the holder and the difference in the self-scanning position of the subject surface with respect to the repetition period. In order to replace the data of the subject surface position in consideration of the moving speed in a predetermined storage location, necessary detection information is output.

(Example) Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, the holder main body l has its lead wire 2 connected to a printer (not shown), and can be moved by holding the upper handle 3 in your hand and moving it along the subject surface 4 of a book or the like. While reading the text and other images. Figure 2,
Referring to FIG. 3, the two-pronged mounting arm 5 is attached to the holder body 1 by a pin 6,
It is rotatable around the pin 6.

The sensor holder 7 houses an image sensor 8 and has two axes 9 parallel to the self-scanning line indicated by the array of image sensors 8 in FIG. 3 and perpendicular to the pin 6. , 9° are installed, and each shaft 9, 9° is equipped with a wheel 10° 10' and a magnet ring 11, 11' for rotating speed detection that rotates integrally with the wheel, and then installed. Forked part of arm 5! It is rotatably mounted at 2.12 degrees. The bottom part I3 of the sensor holder 7 is parallel to the self-scanning line of the image sensor 8 from left to right in FIG. It forms a flat plane. The upper part of the sensor holder 7 is biased to the left in FIG. 2 by a spring 14. The stoppers 15 and 16 always lock the sensor holder 7 to the holder body l by the biasing force. The pole ICl7°17° is the magnetic ring 11,11
On the other hand, the magnetic wheels lt and tt' have magnetic poles arranged by equally dividing the circumference into a plurality of parts, and the magnetic wheels 10 and 10 are arranged along the outer periphery of the Hall ICs 17 and 17°, respectively. A pulse signal with a period corresponding to the rotation speed of ' is generated.

The wheels i o and too are made of rubber around the edges to prevent them from slipping between them and the subject surface 4, and the bottom of the sensor holder 7!
3 is a slippery flat surface. The light source 18 illuminates the subject plane 4, and the image sensor 8 illuminates the subject plane 4 through a rod lens array 19.
Receives reflected light.

The switch 21 is turned on when operating the holder main body l,
The operation of the image sensor 8 and Hall IC 17, 17° is started.

Figure 4 is a control block diagram. In the figure, the central processing unit (CPU), fixed memory (ROM), temporary memory (rlAM), and input/output board (Ilo) form a microcomputer. , the image sensor 8 receives the data from the hole 1017.17°, processes the image data of the subject surface 4, displays the result as an image on the display section (Dis), and then prints it on the printer (PR). Print the image. The touch sensor (T, S) is
By specifying each coordinate on the display surface of the display section (DIS), the coordinate designation is input into the microcomputer, and the image is edited by repositioning the image while pressing the display surface with a pen tip, etc. or start printing by specifying specific coordinates.

Figures 5, 6, and 7 are for explaining the reading of each data such as an image and the processing of that data.For convenience of explanation, the wheels 10 and 10' are shown as shown in Figure 5. The n elements of the image sensor 8 are represented by symbols (A) and (B).
) and (B), and the others are arranged at equal intervals on a straight line between them. FIG. 5 shows that the holder main body l is operated to move to the right in the figure at the speed of the position, and each self-scanning line (Eo) ~
(Em), and because the speed of wheel (B) was slightly faster than wheel (A), each trajectory (ALXBL) was scanned along normal trajectory (ALSXI3LS).
) indicates that the curve was drawn deviating from the curve. In FIG. 6, the standard timing S of a constant period ticked by a microcomputer is written side by side, and each waveform corresponds to FIG. 5.
One self-scanning is repeated in the vertical direction of the figure every time Δ, and the data of each element No. 1 to No. n of the image sensor 8 is read, and the white corresponds to high level and the black corresponds to low level. are doing. Each of these element No.

The data of 1-No, n is stored in a temporary storage device (R
AM) are stored in an orderly manner at each predetermined location.

The waveform resulting from the collection of these data is related to the exposure content of the subject surface 4 and the moving speed of each element NO, 1-NO, n. Each Hall IC17, 17° (sign this as (
DAXDB)) are pulses of the wheel (A), respectively.
, (B) are accelerating as time t progresses, and the wheel (B) is accelerated to a greater degree than the wheel (A).

Here, for example, each pixel data Ec1 and Ecn on the self-scanning line (E c) of the image sensor 8 at time tc is
Each pixel data Fc is assumed to have been read on the self-scanning line Fc at time tc when the data is moved linearly in the horizontal direction at a predetermined speed (this is called standard travel).
+, will be stored in a predetermined storage location in the temporary storage device (jt AM) of Fcn. That is, when the data is read out from the temporary storage device (flAM) and printed, pixel data EC5 is printed at a position corresponding to pixel data Fc+ in the figure, and similarly pixel data Ecn is printed at a position corresponding to pixel data Fcn. That will happen.

The microcomputer corrects this in the following steps. In order to obtain the coordinates of the data Ec, , Ecn in FIG. 5, first, from time 1=1C-Δt to t
= Travel amount ΔLA of wheels (A) and (B) until reaching tc
, ΔLI3 and changes in coordinates ΔLX^, ΔLYA, ΔL
Find XB and ΔLYB (however, ALXA, ALYA<! not shown). The distance that the wheels (Δ) and (B) move on the subject surface 4 for each pulse of the Hall IC (DA) and (DB) is p
and Hall IC (DAXDB
) period is Sakae^i=+TacSTBi==TBc(i=
In the case of +-starvation, 1=c), each movement mΔLA,
ΔLB is ΔL^= (p/T AC)Δt.

ΔLI3=(Δt of p/TB) Regarding the wheel (B), the standard running trajectory in the previous state (
Let θC be the declination angle with respect to BLS), and ΔθC be the angle at which the wheel (B) turns with time Δt. Assuming that ΔθC is small and θC is also small, the change in each coordinate ΔL
XB, ΔLYB are ΔLX[I=ΔL[1cos(θC+ΔθcC−ΔL
BcosθC÷ΔLB.

ΔLY[l=ΔLBsin(θC+ΔθC)÷ΔLBθ
It becomes C.

The deflection angle θC can be calculated using the general formula (%) (%) (:1) for each self-scanning position j, where the distance between the wheels (AXB) is set as D. Therefore, each coordinate, Excn%EYcn, is
Excn=Σ(i=1-c)ΔxBi=Σ(i=
1-c) ΔLBi±Σ(1=1...cXp/TBt
)ΔtEYcn=Σ(i=1−c)ΔLYBi=Σ(
i= 卜c')ΔLBlθl=Σ(i=1...C)Δ
LBl[Σ(l=1...c)(p/D)((1/TB
i)-(1/TAi))Δt]. In addition, El[C
+, Excn for EYct.

Since the subscript B in the formula for EYcn can be rewritten to A, its description will be omitted. On the other hand, each coordinate Fx in the case of standard driving
cn, FYcn, if the period of the wheel (I3) is To, then Fxcn=(p/To)Σ(i=To...c)ΔtFY
Since cn=0, the correction amounts ΔXcn and ΔYcn for each coordinate are Δ
Xcn=Excn-Fxcn=p(Σ(i=1=・cX
l/TO1)Δt-Σ(i=t・-c)CI/'
I'o)Δt)=pΣ(1=1-c)((1/'rBi
) −(1/To))ΔtΔYcn=EYcn −FY
cn=EYcn. Therefore, the data Fen is corrected mΔX from a predetermined storage position of the temporary storage device (RAM) corresponding to each coordinate Fxcn, FYcn in the case of standard driving.
The data is corrected by restoring the memory to a storage position corresponding to the position moved by cn and ΔYcn.

The operation of the above configuration will be explained with reference to the flowchart of FIG. The program starts when the switch 21 is turned on. While the holder main body 1 is moved and one of the pole ICs (DAXDB-) is generating a pulse, each element number of the image sensor 8,
1...No, n data is in temporary storage (RAM)
is memorized. Its storage location is No. 6 in FIG.
, 1 . . . No, n is assumed to be a position determined by n rows and m columns divided by each repetition time Δ of self-scanning of the image sensor 8 with respect to time t.

At the same time, from the data of Hall IC (DAXDB), the period TAi, '1'Bi(i
= 1...m) are calculated and similarly stored in the above column.

The holder main body l stops and the holes Ic (DA), (DB
) is no longer generated, each coordinate correction mΔXjk, ΔYjk (j= 1 = -
c...m, =1...n) is calculated (the calculation formula is ΔXcn.

(According to the formula of ΔYcn). Then, each data in the n rows and m columns is stored in a storage device that has been corrected by ΔX jk and ΔYjk, respectively. An image based on the results is displayed electronically on a display (DIS).

Similarly, when the holder main body l is operated sequentially by changing the location, each data is memorized and arithmetic processed, and the display (Di
This is added to s) and an electric light is displayed.Next, when the touch sensor ('1'', S) specifies a change in the arrangement of the image, the position change calculation is performed and the result is displayed as an electric light on the display (Dis). When print start is designated by the touch sensors (T, S), the content of the displayed image is printed by the printer (PR).

(Effects of the Invention) As described above, according to the present invention, the subject surface is suitable for thick printed materials such as books, and the holder main body is installed on the subject surface and manually operated. By moving along the movement of the wheels, the exposure data of the subject surface and related data for correction due to deviations in the speed and direction of movement are output, so the image on the subject surface can be printed faithfully. It can be used as information such as

[Brief explanation of the drawing]

Figure 1 is an external view of a device showing an embodiment of the present invention, Figure 2 is a cross-sectional view of its structure, Figure 3 is a cross-sectional view taken along
The figure is a block diagram of the control circuit, and FIG. 5 is a diagram showing an example of the movement trajectory of each wheel and an example of movement of the self-scanning line of the image sensor.
FIG. 6 is an output waveform diagram of each element of the image sensor and each Hall IC, FIG. 7 is an explanatory diagram of image data memory rewriting calculation,
FIG. 8 is a control flow chart. In the figure, holder main body 11 sensor holder 7 is a boulder, 4 is a subject surface, 8 is an image sensor, 10.10' (A) (B)
is the wheel, Hall I Cl 7, 17' (DAXDB)
is a rotation detector. Patent applicant Janome Sewing Machine Industry Co., Ltd. t=tct=t
I, S, 11 field --- 11 --- Upper X stop ~ o, f
+++: +++ DE +++

Claims (1)

[Claims] A holder that is manually operated and whose bottom part contacts the subject surface when in use, and an image sensor that is attached to the holder and whose self-scanning line is parallel to the subject surface in the use state, and which rotates at a predetermined period. an image sensor that repeats self-scanning and converts the exposure from the object surface into an electrical signal; and a wheel that rotates around a shaft attached to the holder parallel to the self-scanning line, the holder being the object. An image reading device comprising: a wheel that rotates while being pressed against a subject surface by being moved along a surface in a direction perpendicular to the self-scanning direction; and a rotation detector that detects the rotational speed of the wheel.