JPS63211864A - Manual scanning type image input device - Google Patents

Abstract

PURPOSE:To improve the operability by providing a reference data memory, an updating timing generation part, a correlator, a maximum value detection part, and a moving-amount calculating part, and instructing the movings both in X-direction and Y-direction simultaneously. CONSTITUTION:To followings parts are provided: the reference data memory 13 to store a one-dimensional image data outputted from a linear image sensor 93, the updating timing generation part 12 to generate write instruction to write a one-dimensional image data in the memory 13, the correlator 14 to obtain a correlation value R(j) in case the one-dimentional image data stored in the memory 13 and a one-dimensional image data from the sensor 93 are shifted by j-pieces of picture elements (-m<=j<m; where (m) is natural number) from each other, the maximum value detection part 15 to obtain the value (J) of a correlation value R(j) when it represents the maximum value R(J), and the moving-amount calculating part 16 to calculate the amount of the moving of the image sensor 93 in the Y-direction from the value of (J). As a result, the movings can be achieved simultaneously in both X-direction and Y-direction, hence the operability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mouse function of a manual scanning type image input device for a personal computer or a word processor.

[Conventional technology]

Personal computers and word processors use manual scanning image input devices that can input an original image by simply holding a sensor housing (scanner) and tracing the original by hand. Also,
On the one hand, a mouse is used as a pointing device to support the coordinates of a display. Although a mouse is a separate manual scanning image input device, it would be convenient to have a device that combines the functions of both.

Hereinafter, a device (FIG. 9) in which a mouse function is added to such a manual scanning type image input device will be described.

First, the image input function will be explained. In FIG. 9, reference numeral 94 denotes an illumination light source, which illuminates the original through a window at the bottom of the scanner (casing) 91. The original image formed on the linear image sensor 93 by the lens 95 is converted into an electric signal indicating its density, and converted into a black and white digital signal by the binarization circuit 97. The drive circuit 92 generates a clock signal for driving the linear image sensor 93 at regular intervals. The output timing detection unit 96 measures the amount of movement of the scanner S1 on the document, and generates an output timing pulse every time the scanner S1 moves by ΔX. The output control section S8 is
Every time an output timing pulse is input from the output timing detection section 96, the image signal from the binarization circuit 97 is output, and when no output timing pulse is input, the image signal is read and discarded. Every time the scanner 91 moves by △X,
One-dimensional image signals obtained by the linear image sensor 93 are sequentially stored in an image memory 99 and developed into a two-dimensional image.

FIG. 10 shows the configuration of an example of the output timing detection section 96. The shaft of an incremental encoder 101 is connected via a wheel 103 to a pole 102 that rotates in contact with the document, and when the scanner S1 moves in the X direction, the pole 102 and the wheel 103 rotate.
rotates, and the encoder 101 generates one pulse for each movement amount ΔX. FIG. 11 is an explanatory diagram of a two-dimensional image developed in the image memory 99. When the scanner 91 is moved, for example, in the X direction, the linear image sensor 93 scans in the Y direction perpendicular thereto, and obtains one line of image in the Y direction with one scan. Therefore, the scanner 91
While detecting the amount of movement in the X direction of When connected, a two-dimensional image as shown in FIG. 11 can be obtained.

Next, the mouse function will be explained. The output timing detection unit 96 generates a timing pulse every time the mouse moves by ΔX, so this is input to the computer as the mouse output in the X direction. If it is desired to input the amount of movement in the Y direction into the calculator, switch SW is switched to input the timing pulse generated from the output timing detection section 96 into the calculator as the mouse output in the Y direction.

[Problem that the invention seeks to solve]

In the conventional mouse-type manual scanning image input device as described above, during manual scanning, it is not possible to obtain the X-direction mouse output and the Y-direction mouse output at the same time; It was only possible to instruct the amount of movement of one of them.

In addition, it was necessary to switch a switch to indicate whether the amount of movement was in the X or Y direction, making the operation complicated.

[Means for solving problems]

This invention, which was made to solve the above problems, includes a linear image sensor and a movement of the linear image sensor in a direction (X direction) perpendicular to a photoelectric scanning direction (Y direction) of the linear image sensor caused by manual scanning. In a manual scanning image input device having an encoder that generates a signal representing a quantity, a reference data memory stores one-dimensional image data output from the linear image sensor, and one-dimensional image data is written in the reference data memory. An update timing generating section that generates a command, and the one-dimensional image data stored in the reference data memory and the one-dimensional image data of the linear image sensor are connected to each other by one pixel (-m
≦j≦m: m is a natural number) Correlation value R(j) when shifted
a maximum value detection unit that calculates J when the correlation value R(j) indicates the maximum value RU), and a movement amount calculation unit that calculates the movement amount of the linear image sensor in the Y direction from the value of J. It is characterized by having the following.

[Effect]

The operation of the mouse function of the manual scanning type image input device with a mouse function according to the present invention having the above configuration will be explained with reference to FIG.

In FIG. 1, the one-dimensional image data output of the linear image sensor 93 is digitized by the binarization circuit S7 to sequentially obtain black and white image data (hereinafter referred to as - row image data). This is the same as the case of the prior art described with reference to .

Comparison data memory 11 stores one line of image data. The reference data memory 13 receives a command from the update timing generator 12 and copies the contents of the comparison data memory 11. The correlator 4 correlates the contents of the comparison data memory 11 and the reference data memory 13 while shifting them from each other. Let the number of 93 pixels of the linear image sensor be n, and the value of each pixel (0 for white, 1 for black) of one line of image data stored in the comparison data memory 11 is sequentially yl, y.
2, .
,,u2,...,ufi, the correlation value R(
0) is calculated as R(0) = Σδ(yl-ul). However, δ (k) is k=0
This is a function that is 1 if k≠0, and 0 if k≠0.

The value R(j) obtained by shifting the content of the comparison data memory 11 by one pixel and comparing it with the content of the reference data memory 13 and calculating the correlation is R(j)−Σδ (yi+j u□) (j>O
) God 4 R(j)=Σδ(y+-ui-,) (when j<O) Calculated as follows. The correlator 14 has R(0), R(1), R(-
1), R(2), R(-2) ,..., R(m
), R(-m) (m: natural number) is calculated.

The maximum value detection unit 15 detects R(0), R(1), R(-
1) Find the number J of pixels showing the maximum value R(J) from R(m), R(-m).

Linear image sensor 93 along with scanner (housing) 91
When moving in the Y direction, the one-line image data U shifted by 5 pixels from the one-line image data y stored in the reference data memory 13.
, is stored in the comparison data memory 11, then R(j)(
-m≦j≦m), R(J) shows the maximum value.

The movement amount calculation unit 16 calculates the movement amount in the Y direction from the value of J, and inputs it to a computer or the like as a mouse output in the Y direction. Since the image has moved J pixels in the Y direction on the linear image sensor 93, if the pixel pitch on the document surface during photoelectric scanning by the linear image sensor 93 is △y, then The amount of movement is −J×Δy in the opposite direction to the movement of the image (when using a lens that does not invert the image). Note that the X-direction mouse output is obtained in exactly the same way as in the case of the prior art described above.

To summarize, one line of image data output from the linear image sensor 93 is correlated with the contents of the reference data memory 13 while being shifted by one pixel (-m≦j≦m).

The maximum value R(J) of the correlation value at that time is the maximum value detection unit 15
Y of the near image sensor 93 is detected from the value of J.
The amount of movement in the direction is calculated and input to a computer or the like as a mouse output in the Y direction. Also, reference data memory 1
The contents of 3 are updated as appropriate according to instructions from the update timing generating section 12.

〔Example〕

Hereinafter, an embodiment of a manual scanning type image input device with a mouse function according to the present invention will be described with reference mainly to FIGS. 3 to 5. FIG. 3 shows an embodiment of the update timing generator 12, comparison data memory 11 and reference data memory 13 in FIG. 1, and FIG. 4 is a block diagram of an embodiment of the correlator 14. Further, FIG. 5 is a block diagram of an embodiment of the maximum value detection section 15 and the movement amount calculation section 16.

In FIG. 3, the update timing generator 12 has a shift register 31, and when the power is turned on, the shift register 31 is filled with (0, O, O, 0, 1) by a load clock.
) is set. Thereafter, every time the synchronization signal 5YNC indicating the scanning period of the linear image sensor 93 is input, the outputs of the shift register 31 QA1Q3, QclQD, ,Q,
is (1゜0.0.0.0)→(0,1,0,O,O)→
(0,0,1,0,O)→(0,O,0,1゜0)→(
It changes from 0,0,0,0,1)→(1,O,0°0.0). The outputs of the shift register 31 changing in this way are 3=2.3=-2, j-=1, j=-1, j=
The case of 0 is shown, and the processing for each case is performed according to this change. Note that the synchronization signal 5YNC is a binary output data signal DATA of each pixel of one-dimensional image data.
If the number of pixels of the linear image sensor 93 is n, then n clocks (CL
K) One synchronization signal (SYNC) pulse is output per pulse (FIG. 2).

The comparison data memory 11 and the reference data memory 13 are
Both consist of shift registers with the same number of stages as the number of pixels n of the linear image sensor 93, and when the output Q of the shift register 31 is 0, its own serial output S. , T to CL
The stored contents are saved by returning the serial input signal Sin according to the K pulse, but when Ql is 1, the comparison data memory 11 takes in the DATA signal according to the CLK pulse, and the reference data memory 13 receives the DATA signal from the comparison data memory 11.
The contents are updated by taking in the output of the CLK pulse. The output y of the comparison data memory 11 and the output U of the reference data memory 13 are sent to a correlator 14, and their correlation values are determined.

In the correlator 14 shown in FIG. 4, 41, 42, and 43 are all two-stage shift registers, and the output QA of the first stage and the output Q11 of the second stage are input from the serial input SIN, respectively.
CLK and a signal delayed by 2 CLK. A gate 44 selects a signal according to the output of the update timing generator 12, a gate 45 correlates each bit of the y signal and a U signal, and a counter 46 counts the number of matching bits in synchronization with the CLK pulse. be done. counter 4
6 is initialized (reset) to 0 every time a 5YNC pulse is input, and one correlation value R(j
) and outputs it to the maximum value detection section 15 from the R terminal.

Next, the maximum value detection section 15 and movement amount calculation section 16 shown in FIG. 5 will be explained. Correlation value R output from the correlator
(j) is compared with the value already stored in the register 51 by the comparator 52, and if the correlation value R(j) is larger, that value is stored in the register 51, and the value at that time is stored in the register 53. The output of the update timing generator 12 (Q A=
Q,) are stored. The register 51 is initialized to O when a 5YNC pulse is input at the time of j-o, but just before that, the maximum value of the correlation value R(j) is stored in the register 51, and the corresponding update timing is generated. The output of section 12 is stored in register 53.

The two-stage shift register 54.55 of the movement amount calculation unit 16 stores the movement amount to be output when the 5YNC pulse is input at j-0. According to each case of j=2, -2.1, -1, the shift register 54 has (1, 1
), (0,0), (0°1), (0,0), but the shift register 55 has (0,O) (1,1), (0,O)
(0, 1) are respectively set. Here, assuming that the mouse output of this manual scanning type image input device is inputted to, for example, the UP/DOWN counter 56 provided in the host computer 57, the UP/DOWN counter 56 is input as the scanner 91 moves.
To update the contents of the /DOWN counter 56, it is sufficient to apply an UP pulse or a DOWN pulse from the output of the movement amount calculation unit 16, and the shift register 5 is updated in synchronization with the CLK pulse.
The amount of movement in the Y direction is given by the UP/DOWN pulse output from 4.55.

Although the above embodiment has been described for the case where m=2, it is of course possible to create an embodiment where m=3 or more by increasing the number of stages of the shift register 31 of the update timing generating section 12.

Further, in the above embodiment, the comparison data memory 11 and the reference data memory 13 are updated at fixed time intervals (specifically, every five scans of the linear image sensor 93). (B) Every time the movement of the scanner 91 is detected; (B) Every time the movement of the scanner 91 is detected or a certain period of time has elapsed; (C) The movement of the scanner 91 is detected or the correlation value is below a certain level It is also possible to implement an embodiment in which the above-mentioned update is performed every time.

In particular, when the scanner 91 (linear image sensor 93) is moved very slowly (in the +Y direction) as shown in FIG.
)≧R(1), R(0)≧R(-1), and movement may not be detected. For example, when the contents of the reference data memory 13 are as shown in FIG. 6(b), moving the scanner 91 by 0.5 pixel in the 10Y direction results in the contents of the data memory 11 being relatively as shown in FIG. It looked like (
-The pixels of the clay became black, and due to pixel decomposition, the black in the middle became 2 pixels to 3 pixels), R(0) = R
(-1), and the contents of the reference data memory 13 are updated without movement being detected.

On the other hand, if the above (a) is done, the contents of the reference data memory 13 are not updated quickly, so movement can always be detected. Furthermore, if the above (b) or (c) is done, if the scanner 91 is lifted up, the movement in the Y direction will not be detected and the contents of the reference data memory 13 and comparison data memory 11 will be significantly different. situations can be prevented.

Further, in the embodiment described above, the correlator 14 can only obtain one correlation value R(j) at a time, but a plurality of correlators may be provided to obtain a large number of correlation values (for example, R(-2) at a time). ),
R(-1), R(0), R(1), R(2)), and in this case, the seventh
As shown in the figure, it is also possible to create an embodiment in which the comparison data memory 11 is not required by storing the new image sensor output in the reference data memory 13 while outputting the contents of the reference data memory 13.

In addition, in order to obtain the amount of movement in the Y direction according to this invention,
It is necessary that an image approximately equal to an image obtained by shifting the image of the reference data memory 13 in the Y direction be entered into the comparison data memory 11. Therefore, for example, as shown in FIG. 8(a),
When trying to detect movement in the Y direction on a document in which the image captured by the linear image sensor 93 changes significantly when the scanner 91 is moved in the
It must be operated in such a way that it does not move in any direction.

Regarding this, for example, if you prepare a scanner stand with a figure drawn that does not change in the X direction, as shown in Figure 8(b), this restriction will disappear, and it will be possible to move both the X and Y directions simultaneously. This improves operability.

〔Effect of the invention〕

Since the manual scanning image input device with a mouse function according to the present invention can simultaneously instruct movement in the X direction and the Y direction, the following remarkable effects can be achieved.

(a) Operability is significantly improved compared to conventional manual scanning image input devices with a mouse function that could only specify either the X direction or the Y direction at a time.

(b) It requires less space than when a manual scanning image input device without a mouse function is used together with a dedicated mouse device, and the cables for the manual scanning image input device and the mouse device can become entangled. It can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of a manual scanning image input device with a mouse function according to the present invention, FIG. 2 is an explanatory diagram of basic signals used in the device of the present invention, and FIG. FIG. 4 is a block diagram of its correlator, FIG. 5 is a block diagram of its maximum value detection section and moving distance calculation section, and FIG. ), (b) and an explanatory diagram showing the relationship between the contents of the data memory and reference data memory when the scanner is moved slowly; FIG. 7 is a block diagram of another embodiment of the present invention; FIG. 8 (a) and (b) is a schematic diagram showing an example of a document with a change in the X direction and a document with no change in the X direction, respectively, and FIG. 9 is a block diagram of an example of a manual scanning image input device with a mouse function according to the prior art. FIG. 10 is a perspective view showing the mechanical configuration of the output timing detection section, and FIG. 11 is an explanatory diagram for explaining the principle of image input using a manual scanning type image input device. 11... Comparison data memory, 12...
Update timing generation unit, 13...Reference data memory, 14...Correlator, 15...Maximum value detection unit, 16...Movement amount calculation unit, 93...
...Linear image sensor, 96...Output timing detection section, 101...Encoder"I 8 K meeting Shin Iy April 5, 1988 Manual scanning image input device 3 , Relationship to the case of the person making the amendment Patent applicant address 5-15 Kitahama, Higashi-ku, Osaka Name (218) Sumitomo Electric Industries, Ltd. 6. Subject of amendment Contents of amendment (+) "And" on page 18, line 5 of the specification will be corrected to "and (e) is".

Claims (1)

[Claims] (1) It has a linear image sensor, and by holding and moving the sensor housing (scanner) in the direction (X direction) perpendicular to the photoelectric scanning direction (Y direction) of the linear image sensor, two-dimensional In a manual scanning image input device capable of inputting images: a reference data memory for storing one-dimensional image data output from the linear image sensor; generating a command to write one-dimensional image data in the reference data memory; An update timing generation unit; when the one-dimensional image data stored in the reference data memory and the one-dimensional image data of the linear image sensor are shifted by j pixels (-m≦j≦m; m is a natural number); A correlator that obtains a correlation value R(j); A maximum value detector that obtains J when the correlation value R(j) indicates the maximum value R(J); From this J value, a linear image sensor in the Y direction is detected. A manual scanning image input device with a mouse function, comprising: a movement amount calculation unit that calculates a movement amount;