JPS6023392B2 - Hand scanning figure input method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hand-scanning figure input method, and more particularly, to a hand-scanning figure input method, in which an optical figure detector and a coordinate reader are combined to accurately store detection information of the optical figure detector in a memory. This allows highly accurate graphic input even in a hand-scanning graphic input method.

2. Description of the Related Art Conventionally, there is a hand scanner that scans a document paper by hand to capture characters and figures written on the document paper.

This hand scanner, as shown in Figure 1A,
A light source, an optical detector, lenses, and other necessary optical systems are built into the inside of a pistol-shaped structure suitable for manual scanning. It is used as a simple reading means for reading and other barcode discussions. For example, when reading a character with this hand scanner, as shown in Figure 1C, if the character is not positioned correctly within the discussion frame, the character will not be read. As shown in FIG. 1D, the apparatus is configured to read characters when they are located within the frame. Therefore, it was not possible to read figures larger than this frame. Therefore, a method has been considered in which such an area sensor (an optical detector that can input plane information) is moved by manual scanning and the screens captured at regular intervals are electrically pasted together, but the speed of manual scanning is limited. There is unevenness, and if the speed is too high, there will be no overlapping areas and bonding will be impossible, so it is necessary to scan at a speed that allows each screen to overlap.

In addition, there must be enough character or graphic patterns in each screen to create the sweet combination, and places where nothing is written over an area larger than the field of view (one screen) of the area sensor, such as figures ( If the white part of the paper is scanned, pasting is impossible. On the other hand, it is also possible to manually scan the graphic part using line sensors arranged perpendicular to the scanning direction to input one line of the figure across the line sensor, but in this case, due to uneven speed in the scanning direction, , for example, A shown in FIG.
When reading the figure , if the speed in the scanning direction changes as shown in the opening of the third figure, the read output will be the third figure.
When the image is distorted as shown in FIG. 4A, and further in the Y direction as shown in the opening of FIG. 4, the read output is distorted as shown in FIG. 4A.

Therefore, since there is no means for absorbing variations in speed in the direction of movement due to manual scanning or movement blur in the direction perpendicular to the direction of movement, it is difficult to accurately input graphic information over a two-dimensionally wide area. It was impossible. Therefore, it is an object of the present invention to solve these problems and provide a much more accurate graphic input method despite manual scanning. For this purpose, in the hand-scanning graphic input method of the present invention, in a hand-scanning graphic input device having a hand-scanning optical graphic capture means that is scanned by hand,
A tablet that generates coordinate position information, a coordinate detection means that detects the coordinate position, and a storage means, and the optical figure reading means and the coordinate detection means cooperate,
The apparatus is characterized in that the coordinate position of the figure reading means is identified, and the output information of the optical figure reading means is stored in the storage means in accordance with this coordinate position.
An embodiment of the present invention will be described below with reference to FIGS. 5 and 6.

In the figure, 1 is a tablet board, 2 is an X drive coil, 3 is a Y drive coil, 4 is an X coil drive circuit, 5 is a Y coil drive circuit, 6 is a document paper, 7 is a detection coil, 8 is a character/figure 9 is a reading sensor, 10 is a mount unit for manual scanning, 11 is a switching circuit, 12-1 is a first line buffer, 12-2 is a second line buffer, 13 is an X●Y coordinate detection 14 is a switching circuit, 15 is a shift circuit, 16 is a memory address instruction section, and 17 is a memory.

The tablet board 1 is provided with an X drive coil 2 and a Y drive coil 3, and the X drive coil 2 is provided with an X coil drive circuit 4.
is connected to the Y drive coil 3, and a Y coil drive circuit 5 is connected to the Y drive coil 3, and pulses as an X coil drive signal and a Y coil drive signal are sent at regular time intervals, respectively.

The X drive coil 2 and the Y drive coil 3 have a delay characteristic, and when the respective drive signals propagate on the X drive coil 2 and the Y drive coil 3, a transmission delay time, which will be described later, is proportional to the length of each drive signal. By measuring at , it is possible to detect a specific coordinate position. Document paper 6 has images 8 such as characters and figures written on it, and these images are taken by means described later.

The detection coil 7 identifies and detects the X coil drive signal and the Y coil drive signal transmitted to the X drive coil 2 and the Y drive coil 3, and is installed on the mound part 10' together with the discussion sensor 9.

The discussion sensor 9 is a sensor that optically reads images such as characters and figures written on the document paper 6, and is a one-dimensional sensor such as a CCD, for example.

The output signal of this reading sensor 9 is passed through a switching circuit 11 to either a first line buffer 12-1 or a second line buffer 12-1.
It is sent serially to buffers 12-2. The ×/Y coordinate detection circuit 13 detects the X coil drive signal detection time transmitted from the detection coil 7 and the X coil drive signal transmitted from the X coil drive circuit 4.
Detection coil 7 due to the time difference with the coil drive bond sending time
, and also calculates the Y coordinate transmitted from the detection coil 7.
The Y coordinate of the detection coil 7 is calculated based on the time difference between the coil drive signal detection time and the Y coil drive signal transmission time transmitted from the Y coil drive circuit 5, and the X coordinate obtained in this way is stored in the memory address. The Y coordinate is transmitted to the instruction section 16 and the Y coordinate is transmitted to the shift circuit 15.

The switching circuit 14 is a switching circuit that selectively outputs the output of the first line buffer 12-1 or the second line buffer 2-2 to the shift circuit 15, and indicates that the X coordinate of the detection coil has changed. - When detected by the Y coordinate detection circuit 13, the switching operation is performed based on this detection.

The shift circuit 15 performs a shift operation based on the Y coordinate signal of the detection coil 7 transmitted from the X/Y coordinate detection circuit 13, and when the position of the detection coil 7 shifts in the Y direction, it shifts the amount corresponding to this. A shift is performed for correction.

That is, when picking up the character figure shown in Figure 6A, if the discussion sensor is divided into Ca to Cn as shown in Figure 6A, first read the x coordinate Xa and then When sequentially reading Xb, Xc, etc., Xb→
Consider the case where the discussion sensor 9 moves downward by one coordinate in the Y direction at Xc. If the discussion sensor 9 does not move downward when it is positioned at As shown in Fig. 6C, the divisions Ca, Cd,
Cn-1 detects the presence of a figure (for simplicity of explanation, the size of one section of coordinates and the size of one section of sensor are assumed to be the same). Therefore, in this case, if the signals detected in each section of the discussion sensor 9 are stored as they are, the figure will be distorted, so when the signal is shifted by one coordinate in the Y direction as in this case, it is changed by one coordinate in the Y direction. If you shift and memorize it, you can memorize the normal figure. The memory address designator 16 designates the storage location of data to be stored in the memory 7.

Next, the operation shown in FIG. 5 will be explained. (1) First, a document sheet 6 on which images 8 such as characters and figures are written is set on the tablet board 1, and the mount section 10 is scanned in the horizontal direction (X direction) by hand.

t3' Also, the output signal detected from detection coil 7 is
・Transmitted to the Y coordinate detection circuit 13. Here, the location of the detection coil 7 is determined based on the time difference between the X coil drive signal and the Y coil drive signal output from the X coil drive circuit 4 and the Y coil drive circuit 5, respectively, and the respective detection signals. That is, the location of the mount section 10 is calculated.

Then, according to this coordinate position, the memory address instruction section 1
6 designates the memory storage destination, and the data output by the discussion sensor 9 is stored at a predetermined location in the first line buffer 12-1 or the second line buffer 12.
-2 and is transmitted to the shift circuit 15 via the switching circuit 14 and held in the memory 17. At this time, the data from each line buffer and shift circuit 15 is serially transferred, and the data detected by the discussion sensor 9 is serially transferred to the first line buffer 1 via the switching circuit 11.
2-1, and the next line of data is held in the second line buffer 2-2. In this way, the data read out for each sample unit is alternately held in the first line buffer 12-1 and the second line buffer 2-2. At this time, each line buffer 1
2-1 and 12-2 operate as serial shift registers to hold read data input serially. Output in parallel.

'41 If the X-coordinate position detected at a certain sample time T does not change compared to the X-coordinate position at time T-1, the data sent from the argument sensor 9 is not written to the memory 7.

If the x-coordinate changes from the x-coordinate at time T-1, the x-coordinate is transmitted to the memory address designator 16, and new data is written at the corresponding address position. By doing so, it is possible to absorb speed unevenness in the X direction when scanning the mount section 10 by hand.
'5} When writing new data into the memory 17 in step 4 above, the following control operation is performed to absorb blurring in the Y direction that occurs during manual scanning.

Based on the change in the X coordinate, data from either the first line buffer 12-1 or the second line buffer 12-2 is selectively output by the switching circuit 14 and sent to the shift circuit 15.

Then, in this shift circuit 15, a shift operation is performed by an amount proportional to the difference between the Y coordinate determined by the x/Y coordinate detection circuit 13 and the Y coordinate at the start of manual scanning. This data is written into the specified address. In this way, accurate image information is written in the memory 17 in which the blurring in the Y direction that occurs during manual scanning is completely corrected. Further, as another embodiment of the present invention, a two-dimensional array of elements may be used as the optical argument sensor 9 instead of a one-dimensional array of elements.

By using a sensor with two-dimensional array elements, the sampling period in the x direction (scanning direction) can be increased. Furthermore, it is also possible to correct the inclination of the mount during manual scanning based on optical input information.

As described above, according to the present invention, blurring during scanning can be effectively corrected, so graphic information can be input and read very accurately even by manual scanning. Furthermore, the table disk is not limited to the delay linear type, but other types such as ultrasonic type and others can also be used.

[Brief explanation of drawings]

Figure 1 is an illustration of the subordinate hand scanner and its operation;
2 to 4 are explanatory diagrams of distortion during graphic input, FIG. 5 is a block diagram of an embodiment of the present invention, and FIG. 6 is an explanatory diagram of its operation. In the figure, 1 is a tablet board, 2 is an X drive coil, 3 is a Y drive coil, 4 is an x coil drive circuit, 5 is a Y coil drive circuit, 6 is a document paper, 7 is a detection coil, 8 is a character/figure 9 is a reading sensor, 10 is a mount for manual scanning, 11 is a switching circuit, 12-1 is a first line buffer, 12-2 is a second line buffer, 13 is an X/Y coordinate detection 14 is a switching circuit, 15 is a shift circuit, 16 is a memory address instruction section, and 17 is a memory. O 1 figure O 2 figure Na 3 box gum Jinzai 6 figure Sai 5 dew

Claims (1)

[Claims] 1. A hand-scanning figure input device having a hand-scanning type optical figure reading means that is scanned by the hand, which comprises a tablet, a coordinate detecting means for detecting a coordinate position, a storage means, and the optical figure reading means. and the coordinate detecting means to identify the coordinate position of the figure reading means, and output information of the optical figure reading means is stored in the storage means according to this coordinate position. A hand-scanning graphic input method featuring: