JP2627353B2 - Handwriting calculation processor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention relates to a handwriting suitable for a document processing device such as a calculator, an electronic notebook, an electronic notebook, a word processor having a calculation function and a handwriting character recognition function. It relates to a calculation processing device.

(B) Conventional technology In recent years, research and development of handwritten character recognition technology has been advanced, and handwritten character recognition means has been adopted as an input means in a small-sized word processor or other document processing apparatus.

On the other hand, there has been proposed a handwritten mathematical formula processing apparatus which solves the conventional key input of complicated mathematical formulas by performing handwritten input of numerical values, arithmetic symbols, and the like by handwritten character recognition means when performing numerical calculations. (See JP-A-1-250165).

However, in such a handwritten mathematical formula processing device,
Calculation processing is performed on a mathematical expression consisting of a handwritten numerical value and an operation symbol, and the calculation result is displayed and output.However, when the numerical value displayed and output by the already calculated processing is continuously used for the next calculation, There was no consideration, and the calculation processing ability as handwriting calculation processing was poor. That is, even if the numerical data of the already calculated formula and the result are displayed, if this value is used for the next calculation, this value has to be newly input by handwriting,
There was a problem that the burden on the input processing of the operator was increased.

(C) Problems to be Solved by the Invention The present invention has been made in view of the above-described circumstances, and has a function of performing a calculation by recognizing an image of a calculation target input by handwriting in a handwriting format and an operation symbol. In the calculation processing device, by adding a function that can use the numerical value displayed and output by the already calculated processing as a calculation target in a new handwriting form, the handwriting calculation processing capacity is improved, and the operator input processing is improved. This reduces the burden.

(D) Operation The handwritten calculation processing device of the present invention adds a function of using a numerical value displayed and output by the already-calculated processing as a calculation target of a new handwritten form. This value can be used for the next calculation.

(E) Embodiment An embodiment of the handwriting calculation processing device of the present invention will be described below with reference to the drawings.

First, the operation of the handwriting calculation processing device will be described with reference to FIG. The display in the figure shows an example of display on an input / output tablet in which a coordinate input mechanism such as a digitizer is stacked on a dot matrix type liquid crystal display device, and input and display of coordinates are performed at the same position. ing.

In the figure, 1, 3, 5, 9, 13, 16, and 18 are numerical values to be calculated by handwriting input, respectively, 2, 4, 8, 12, 17, and 21 are arithmetic symbols input by handwriting, respectively. , 11, 15, 20,
And 24 show the calculation results, respectively, and 6, 10, 14, 19,
Reference numeral 23 denotes a symbol for indicating the start of calculation and a calculation result display device, and reference numeral 22 denotes a symbol for indicating a numerical value to be calculated and a display position.

In the display example of the figure, the calculation result obtained by handwriting on the tablet is shown as a handwriting input when performing a new calculation as a calculation target of another calculation, and a display state of the calculation result,
It is as follows.

First, numerical values to be calculated, operation symbols, calculation start symbols 1 to 6
Is input by handwriting in the form of multiplication by hand, these handwritten images are recognized, a predetermined first operation processing (addition / subtraction) is performed from the recognition result, and the operation result 7 is displayed below the calculation start symbol 6. Is done.

Next, using the display output of the calculation result 7 obtained as described above as it is, in addition to this value, a numerical value to be calculated,
When the operation symbols and calculation start symbols 8 to 10 are input by handwriting in the form of multiplication by handwriting, these handwritten images are recognized, and a predetermined second operation process (multiplication) is performed based on the recognition result and the above-described operation result 7. The calculation result value 1 is displayed below the calculation start symbol 10.

Further, by using the display output of the operation result 11 obtained as described above as it is, and further inputting a numerical value to be calculated, an operation symbol, and a calculation start symbol 12 to 14 in addition to this value by handwriting in a fractional handwriting format, These handwritten images are recognized, a predetermined third calculation process (multiplication) is performed from the recognition result and the already calculated result 11, and the calculation result 14 is displayed at the right position of the calculation start symbol 14. .

On the other hand, calculation target value, operation symbol, calculation start symbol 16-19
Is input by handwriting in the form of multiplication, these handwritten images are recognized, and a predetermined fourth operation process (multiplication) is performed from the recognition result.
Displayed at the bottom of 23.

Next, in order to perform the addition of the above-mentioned fourth operation result 20 and the above-mentioned third operation result 15 in the form of a multiplication,
21 is input by handwriting, and subsequently, a circle check is performed on the third calculation result 15, and the fourth calculation result is obtained from the circle check.
A symbol 22 consisting of an arrow reaching the 20 position is written by hand, and further a calculation start symbol 23 is handwritten.

When the symbols 21, 22, and 23 thus input are recognized,
From the meaning and arrangement of these symbols, it is determined that the third and fourth operation results 15, 20 already stored and displayed are to be added in a handwriting form of integration. Therefore, as a result of this determination, these values are calculated, and the calculation result 24 is placed below the start symbol 23.
Is displayed.

FIG. 2 shows the configuration of an embodiment of the handwriting calculation processing apparatus of the present invention for realizing the above-described handwriting input operation.

In the device of the present invention shown in the figure, the tablet comprising the coordinate input unit 26 and the display unit 34 integrated as described above is connected to the data processing processor, and the data processing processor
A character / symbol determining unit 27, a character / numerical value recognizing unit 28, a character / numerical value / symbol storing unit 29, a symbol recognizing unit 30, a data extracting unit 31, an arithmetic processing unit 32, and a display data storing unit 33 are configured.

In the apparatus shown in the figure, a coordinate input unit 26 of a tablet integrated with a display unit 34 reads coordinates of a position designated by a pen for inputting coordinates and outputs the coordinates to a character / symbol determination unit 27. Based on the given coordinates, the character / symbol determination unit 27 determines a character, a numerical value, and a symbol, and outputs the result to the character / numeric character / numeric character recognition unit 28. Output to the unit 30.

The character / numerical value recognition unit 28 performs character recognition based on the given result, and stores the recognition result in the character / numerical / symbol storage unit 29 and the display data storage unit 33.

The symbol recognizing unit 30 performs symbol recognition based on the given result. Based on the recognition result, whether the symbol is a symbol for indicating a calculation target and a display position (22 in FIG. 1). , A calculation start symbol (6, 10, etc. in FIG. 1) or an arithmetic symbol. As a result of this determination, if the symbol is for designating the calculation target and the display position, the coordinates of the calculation target position and the display position indicated by the symbol are output to the data extraction unit 31. The data extracting unit 31 extracts a numerical value to be calculated from the character, numerical value, and symbol storage unit 29 based on the coordinate data, and uses the numerical value as the data of the designated display position in the character, numerical value, symbol storing unit 29. And stored in the display data storage unit 33. If the input symbol is a calculation start symbol, the data of the symbol is output to the data extraction unit 31, and the data extraction unit 31 calculates the symbol according to the positional relationship between the symbol and the numerical value based on the data of the symbol. The calculation target (calculation target, operation symbol) of the handwriting corresponding to is extracted from the character, numeric, and symbol storage unit 29, and the data is output to the operation processing unit 32. The arithmetic processing unit 32 calculates the handwriting, and stores the answer and the display coordinates in the character, numerical value, symbol storage unit 29, and display data storage unit 33. If it is determined to be an operation symbol or the like, the symbol and the coordinates are stored in a character, a numerical value, a symbol storage unit 29,
And to the display data storage unit 33.

The tablet display unit 34 integrated with the coordinate input unit 26 displays characters, numerical values, and symbols based on the character, numeric, and symbol data stored in the display data storage unit 33. I have.

The operation of the embodiment of the present invention having such a configuration will be described below with reference to the flowchart of FIG.

FIG. 3 is an operation flow when characters, numerical values, and symbols are input to a tablet in which the coordinate input mechanism and the display mechanism are integrated and the coordinate input and display can be performed at the same position.

First, when there is a coordinate input using a pen in the coordinate input unit 26 (step A1), the coordinate miracle is displayed on the display unit 34 (step A2), while the coordinate data and the pen-up and pen-down information are used. , Stroke extraction (step A3) is performed. By this stroke extraction, characters, numerical values and symbols are discriminated (step A4), and if they are symbols, symbol recognition is performed (step A5), and if they are characters or numerical values, character recognition is performed (step A16).

In the case of a symbol (step A5), it is determined whether or not the symbol is for a calculation target instruction based on the result of the symbol recognition (step A5).
A6), it is determined whether the symbol is a calculation start symbol (step A10).

Therefore, if it is determined in step A6 that the symbol is for indicating a calculation target, the handwritten display of the symbol displayed on the display unit 34 is deleted (step A7), and the numerical value of the specified calculation target is cut out. , Display at the specified position (step
A8) Numerical handwriting (values, coordinates, etc.) is stored in the data buffer of the character, numeric, and symbol storage unit 29.

If it is determined in step A10 that the symbol is a calculation start symbol, the calculation target is read from the data buffer, stored in the calculation buffer (step A11), the handwritten display of the symbol is erased, and the recognition result of the symbol is displayed. (Step A1
2) Then, the data in the calculation buffer is calculated, and the answer is displayed at a predetermined position (step A13).

If it is determined in step 10 that the symbol is not a calculation start symbol (that is, an arithmetic symbol or the like), the display of the handwritten symbol is erased and the recognition result is displayed (step A14). Then, the data (symbol code, coordinates, etc.) of this recognition result is stored in the data buffer (step A15).

On the other hand, when the character recognition is performed in step A16, the handwritten display of the character string and the numerical value is erased, the recognition result is displayed (step A17), and the data of the recognition result (character string, numerical value,
(Coordinates, etc.) in the data buffer (step A1)
8).

(G) Effects of the invention As described above, the handwriting calculation processing device of the present invention
This function adds a function that allows the numerical value displayed and output by the already calculated processing to be used as a calculation target in a new handwriting format.Therefore, there is no need for the operator to manually input this numerical value again. Can be used for the next calculation. Therefore, according to the present invention, it is possible to realize a handwriting calculation processing device capable of improving the handwriting calculation processing ability and reducing the burden on the input processing of the operator.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a handwritten input of the handwritten calculation processing device of the present invention and a display state thereof, FIG. 2 is a configuration diagram of one embodiment of the handwritten calculation processing device of the present invention, and FIG. FIG. 3 is a flowchart for explaining the operation of the embodiment of the device. 26 ... coordinate input unit, 27 ... character / symbol discriminating unit, 28 ... character / numerical value recognizing unit, 29 ... data storage unit, 30 ... symbol recognizing unit, 31 ... data extracting unit, 32 ... calculating unit, 33 ... display data storage Department, 34 ...
Display section.

Claims (1)

(57) [Claims] 1. Coordinate input means for inputting image information of a handwritten calculation formula, recognition means for recognizing numerical data of a calculation formula and operation symbols from the image information input to the coordinate input means, Arithmetic processing means for performing arithmetic processing based on the recognized numerical data and operation symbols, and display means for displaying the numerical data and operation symbols recognized by the recognition means, and the operation results by the arithmetic processing means; In the handwriting calculation processing device, the arithmetic processing means newly inputs the numerical data or the calculation result already displayed on the display means to the coordinate input means, is recognized by the recognition means, and is displayed by the recognition means. A handwritten calculation processing apparatus characterized in that a calculation formula is constructed by adding the numerical data and the operation symbol displayed on the means, and a calculation process is performed based on the calculation formula.