JPS5955587A - Partial erasing system of handwritten information - Google Patents

Abstract

PURPOSE:To decide the erasion information through a simple process, by having a circular range of erasion with a partial erasing system of handwritten information. CONSTITUTION:An eraser 5 is shifted on a white plate 2 to erase the handwritten information on the plate 2. Then a magnetic field detecting coil provided at a holding part 5-2 detects a magnetic field. This magnetic field is fed to a coordinate detecting part 6 in the form of an erasion signal S2. The part 6 calculates the coordintes E1 of the part 5-2 and transmits it to a circular erasion infomation generting part 9. The part 9 generates the erasion information E to erase the picture information within a circle of the same size as an erasion part 5-1 around the coordinates E1 and updating the picture information P that is already stored at a prescribed position of a picture memory 7. As a result, a range equal to that on the plate 2 can be erased even with the pictures displayed on a display device 8.

Description

DETAILED DESCRIPTION OF THE INVENTION (al) Technical Field of the Invention The present invention provides a method for erasing handwritten information + i43 minutes, in particular, detects the coordinates of hand p1 information +14 on a digitizer, and displays the lk, "4" on a display device. 1,000M41+”i lYi
Handrail ll1f +Ii r((;
Regarding the minute elimination method.

(h) 11I' view of J branch, such as electronic blackboards, etc. (1, 1, jj handling, 1111 characters, figures, etc. (hereinafter referred to as 1,71-information and total Jip-a'
) is detected by an isotizer and a display device installed at a remote location6. A handwritten information processing system with two outputs is being developed. FIG. 1 is a diagram showing the configuration of an electronic blackboard which is an example of this type of handwritten information processing system. In the first example, the digitizer 1 has a plurality of magnetic field generating coils arranged vertically and horizontally at predetermined intervals, and displays handwritten information on the surface. A white board 2 is provided. Pen Boulder 3 has a built-in magnetic field detection coil, and Fell 1 Pen 4 is attached to tip Jl+5. With the fer 1 pen 4, the white 4 throws 2, and the grandchild's handrail, I'ii'i <, and the magnetic field generated by the intizer 1 is detected 2+-j. , L are sequentially detected, and the coordinates of the generated detection signal S1 are detected.
6. The coordinate detection unit 6 receives the detection signal S received by the receiver 1a.
1 to white 2, 2, 1, 4, 2)
Calculate the device (J:lE mark) and record the locus of the coordinates on white board 2I.
(Display that responds to handwritten information)) Screen 1 image (
As the elephant attack P, the picture (elephant memory 7 glue I + heart substitution to the raccoon)'□J.Din, play 8 is the concave 1 summoning nomori 7 oko case ♀ 1 tsukari noko image information P sequentially Read out and display images similar to the white board 2 (1;-) on both sides.

(C) Prior Art and Problems In FIG. 1, an eraser 5 is used to erase handwritten information drawn on a white board 2. The eraser 5 erases handwritten information on the white board 2. IX5-1 and the erasing section 5-
1, and the erasing position is detected by digitizer 1.Hold CHI 5, which has a similar configuration to Pen Boulder 3.
-2. When erasing handwritten information on the eraser 5 or the white board 2, a magnetic field is detected by a magnetic field detection coil built into the holding section 5-2 and transmitted to the coordinate detection section 6 as an erasure signal S2.

The coordinate detection unit 6 Lj calculates the position (coordinates) of the holding +'lI 5-2 of the white board 2 from the received erasure signal S2, and erases a blank area on the image corresponding to the erasure range of the erasure unit 5-1. Image 1 already stored in the image memory 7 based on information E? f
Change +1 to '+'Ji. FIG. 2 is a diagram illustrating an example of erasing ranges of various erasing units. "Second" (a) is Fer l
It shows the dot-like erasing range of ``1'' which is the same as that of Ben 4. to be erased. Coordinate detection i′(
1; 6 is F” old! j: clear stroke I), the retention rjl+ 5-, 2 coordinates 1 point found in the same process is used as the erasure information signal, so the generation η-hyperculum of erasure IIIf strike E is simple, Since the erasing range of the erasing section 5-1 is extremely narrow, it is inconvenient to erase a wide range of handwritten information. Figure 2 (bl
4; I, a rectangular erasing part 5-1 commonly seen on a blackboard eraser
The case is shown in which the eraser 5 detects the holding part 1jl (5, 2) at the center of After that, erasing information 17. is generated in a rectangular range of a predetermined size centered on the coordinates 1 and 1. However, at the center coordinate E1, the angle of the erasing section 5-1 on the white board 2'' is determined. (in the case of the dotted line), in order to generate the erasure information IE that matches the erasure range of the erasure unit 5-Octomocho 1 pitch 2-1, see Figure 2 (Erase like C+!'!
+ (It is necessary to have a means for detecting one specific point of PI/mark E1 and IE 2 in 5-1 by means of magnetic field detection 21. The same applies to the eraser 5 having -1.

As is clear from the above explanation, in the conventional partial erasure method that uses the old 1i', the erasure range of rectangular or pressure type is 5 < 21 images, so the coordinates In order for the detection section 6 to match the erasing range on the white board 2 of the erasing section 5-1 and to obtain f erasure information E, the digitizer 1 needs to detect 111 the coordinates of two specific points on the eraser 5.
There was a risk that the eraser 5 and the coordinate detection means would be complicated. Note that the eraser 1[3E of the eraser 5 that erases the point-shaped eraser 5-1 is easily obtained, but the erasers a and Z that erase a wide range of handwritten information are not suitable.

(di Purpose of the Invention The LI aspect of the present invention is to
11. Eliminate the disadvantages of partial erasure of information, whiten the practical erasure range, and erase handwritten information from which erasure information can be easily obtained.
The objective is to realize a 1i-minute erasure method.

tel Structure of the invention This purpose is to reduce the number of hands on the digitizer by
Detects the coordinates of the hand 11 (information t1 in the processing system, detects the coordinates of the circular hand r'+jl'l +t! erasing range, and outputs the corresponding image to the display device). an eraser that displays the center coordinates of the range; and an eraser information generator that generates eraser information in a circular area of the predetermined jurisdiction centered on the detected center coordinates;
This is achieved by cutting the same area as the handwritten information on the digitizer onto the Fitted image.

(fl　Embodiments of the invention An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a diagram showing a partial deletion method of handrail information according to an embodiment of the present invention. Note that the same reference numerals indicate the same objects throughout the figures. In FIG. 3, the eraser 5 has a configuration in which a holding part 5-2' similar to that of the pen holder 3 is placed in the center of a circular erasing part 5-1 of a predetermined size, and the coordinate detection A circular erasure information generating section 9 is provided between the section 6 and the image memory 7. The erasing range on the white board 2 of the erasing section 5-1 is shown in FIG. felt pen 4
The 1,71 information drawn on the white board 2'2 is drawn on the 8th display screen (g') in the same process as shown in Figure 1.
will be displayed as . When erasing the second hand p1 information on the white board 2, move the eraser 5 to the white board 2 and press the magnetic field provided in the holding part 5-2 in the same way as the Benpolder 3. The magnetic field is detected by the detection coil and inputted to the coordinate detection section 6 as the erasure signal S2. The coordinate detection unit 6 uses image information (■)
In the same process, the coordinate E1 of hold n1; 5-2 is calculated.
is calculated and transmitted to the circular erasure information generating section 9. The circular erasure information generating section 9 generates erasure information E for erasing image information within a circle having the same size as the erasing section 5-1 with the received coordinates E1 as the center, and erases the image information stored in the image memory 70 at a predetermined position. Update information P. As a result, even on the image displayed on the display 8, the same area as on the white board 2 is erased.

Circular erasure information generation a] 1 as shown in FIGS. 4 and 5 below
A specific example of No. 9 will be explained. In the figure. Pl and 01) 24
;L differential amplifier, C0PI and C0P2 are comparators, A
N I) is ant game 1, I) G is a circular pattern generator, NΔN I) is chin 1 k-1.

X coordinate E of seat pillar detection unit 6], X and Y coordinate I
E1. Y is input to the non-inverting inputs of differential amplifiers P1 and OF2, respectively. Also difference J amplifier (kawa)
2 and OI') 2 are input with f'zr indicating the radius of the erasing section 5-2.As a result, 5τ' motion multiplier 1) 1) and OP2 are inputted as shown in FIG. The X coordinate of the starting point I shown here is RX, J, and I.
A signal Y is output and input to comparators C0PI and CO1)2. Also, the ratio 1 calibration device COP l and C01'
2, the scanning signals of the display 8 are respectively input to C and L, and when the coordinates of the scanning signals match the X coordinates RX, (, and Y coordinates RY) of the starting point, the starting signal is input via Pattern generator I) G to human power
Ru. In the memo) in the pattern generation PG, the fifth
A logical value 1 pattern is stored in the shaded area in the figure, and a logical value 0 pattern is stored in the other areas.

When the activation signal is input manually, the pattern generator P
A pattern is output from C, and is manually inputted to Nan IX game 1-NΔND along with the run Nr flj "?+. As a result, from Nanto game I N A N D, an output that is the inversion of the output of the pattern Pino Cho-Fure PC is output. 1 or 111 is input and written to the image memory 7.The information recorded in the JJ' image memory 7 is to detect which of the pen port 3 and the eraser 5 is being used. ．Z
, 1, will be selected.

As is clear from the above description, according to this embodiment, since the erasure 81 (5-1 has a circular erasure range), the holding g++
If one point of center coordinates is detected by 5-2, the erasure information E
is also determined in a -H manner.

It should be noted that FIG. 3 is merely one embodiment of the present invention, and the eraser 5 is not limited to one type, for example, and may include a plurality of erasers each having circular eraser Fil(t) 1 of various sizes. It is also considered that 1. However, by identifying the erasing section 5-1 to be used in the circular erasure coordinate generation r+++ 9 and generating the corresponding erasure information IE, the effects of the present invention do not change even in such a case. Furthermore, the configuration of the information processing system to which the present invention is applied is the electronic type shown in the figure, +1. It's great that you are not limited to the J board.

Fl? + Effects of the Invention 2. According to the present invention, in the handrail information processing system (1), an eraser having a practical erasing range is used, but the erasing information or H's pure 2. Can be determined in the process. <
This improves the convenience and economic efficiency of the drought damage information processing system J1.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the configuration of an electronic blackboard which is an example of this type of handwritten information processing system, Fig. 2 is a diagram showing an example of various erasing ranges, and Fig. 3 is a diagram according to an embodiment of the present invention. FIG. 4 is a diagram illustrating the configuration of the circular erasure information generator shown in FIG. 3, and FIG. 5 is a diagram illustrating the fourth operation. In the figure, l is a digitizer, 2 is a white board, 3 is a pen holder, 14 is a Fell I pen, 5 is a t-eraser 5-1 is an erasing part, 5-2 is a holding part, (J) l- 4! ff! Detection unit, 7 image memory, 8 display, 9 L;I
l'J type erase erase generator, OPI and 01) 2 are differential amplifiers, C01i and C01) 2 are comparators, ΔN
I) is Antogame-1, PC is circular pattern generator, NAND is NAND-1-1Sl is detection (No. 11, S2 is erasure signal-1P is image information, 1shi υ, (erasure R
r + fj, El and E2 are coordinates, not shown. Wealth 1 times Z Deaf 2 Figure □＼, ξ revised) (b) (0)
(cL) (ko) 4th, -・■ 5th figure procedural amendment (method) % formula % ( ] (l-ρha Kami<ikawari, 1 Kawasaki car 1□ + 1-ku Kamiodanaka 1015 ( 522) j'chojtomi ``Tsu Co., Ltd. 4 Representative Person r Lord PII Divine Reiyo Egg 1 Nakahara 1 Rin City Nakahara 1<1-・1・1n Naka 1015;・
p113 Message from the stock company it

Claims (1)

[Claims] A handwriting information processing system that detects the coordinates of handwritten information on a digitizer and outputs a corresponding image on a display device; An eraser that displays the coordinates and an erase information generator that generates erase information in a circular area of a predetermined size i'+ii centered around the detected saw center coordinates are provided. A method of partially erasing handwritten information characterized by extinguishing the same area in the image "2".