JPH04179359A - Plotting image processor - Google Patents

Abstract

PURPOSE:To reduce the capacity of a memory, which is required for the storage of data, by setting data inputted from an input tablet to be vector data showing a position and a stroke amount. CONSTITUTION:A main control part 1 calculates a reduction factor as against image data for collectively displaying all image data stored in an image memory 6 in a display part 4, outputs it as reduction information (a) and reduced image data is stored in a synthesis storage part 11. When there is input from a tablet 3, input data is stored in a plotting memory 9 in the form of vector data, is converted into dot pattern image in a development part 10 and is outputted to the synthesis storage part 11. Thus, converted image is synthesized into reduced image output which is previously stored in the synthesis storage part 11 and is stored. Then, synthesized image is displayed in the display part 4. Thus, only little stored capacity of plotting image data is required.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a drawn image processing device.

(b) Conventional technology There are already known drawing image processing devices that can transmit and receive handwritten images along with voice using ordinary telephone lines (hereinafter referred to as telewriting communication). sold by Nippon Telegraph and Telephone Corporation).

In addition, in recent years, devices have been proposed in which a facsimile function is added to the above-mentioned image processing device (for example, Japanese Patent Application No. 1-24
6691).

In such a device, an input tablet for inputting a handwritten image is further equipped with an optical reading means called a scanner, and in addition to the above-mentioned telewriting communication, the above-mentioned image data read by the above-mentioned scanner or the above-mentioned input to this image data is also provided. Image data obtained by combining data input from the tablet can be transmitted as facsimile data (hereinafter referred to as facsimile transmission).

In addition, in such a device, the data input from the input tablet can be corrected, so it is stored separately from the image data read by the scanner, and can be used when sending a facsimile or when special display is required. The configuration is such that both of the above data are combined.

(c) Problems to be Solved by the Invention In conventional devices of this type, data input from an input tablet is also stored as a dot image, similar to image data read by a scanner. For this reason, it was necessary to separately provide storage means having a storage capacity equivalent to that of the storage means for storing image data read by the scanner.

In addition, when inputting data to be added to image data read by a normal scanner from an input tablet, the above-mentioned easy data is displayed on a display section having a display area equivalent to the area of the input surface of such a tablet. Do it in that state. However, from the viewpoint of operability, cost, etc., the size of the input surface of a typical input tablet is 210 mm x 130 mm.
A size that is not very large, about mm, is used. Therefore, the display section has this size, but when displaying image data read from an original of 85 or larger size on a display section of such a size, it can only display it in a reduced form. Therefore, the data input from the input tab left is coarse compared to the image data.

(d) Means for Solving the Problems The present invention has been made in view of these points, and its first feature is a scanner that optically reads images and a memory for storing image data read by the scanner. an input tablet that outputs a trajectory corresponding to a handwritten image drawn on an input surface as vector data; a drawing memory that stores vector data output from the tablet; and a drawing memory that stores the vector data output from the tablet. means for developing the vector data into image data; means for synthesizing the image data developed by the developing means with the image data in the document image memory; and a display for displaying the image data synthesized by the synthesizing means. The main reason for this is that it is equipped with a department.

A second feature is that when a handwritten image is input on the input tablet while the image data in the original image memory is displayed in a reduced size on the display section, the data output from the input tablet is The invention further includes a correction circuit that performs Lagrange correction.

(E) Effect Based on the first feature above, the data input from the input tablet is vector data indicating the position and stroke amount, so even when the image data becomes large, the data input from the tablet can be input from the tablet. The memory capacity required to store the data is less than 1730, which is the capacity required to store the image data.

Furthermore, according to the second feature, even if the resolution of the input tablet is higher than the resolution of the image data displayed on the display unit, more detailed corrections can be made through correction.

(f) Embodiment FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, (1) is a main control section consisting of, for example, a microcomputer. Controls the various parts explained in .

(2) is an input section, and the operation of the apparatus of this embodiment is specified in the input section. (3) is an input tablet,
The tablet is constructed of a well-known type such as a current/voltage sensing type or a pressure sensitive type, and its input surface is transparent. In addition, the handwritten drawing image input from such a tablet (
(trajectory) is output as vector data consisting of the input position, stroke amount, and direction. (4) is a display section consisting of, for example, a liquid crystal display, and the display surface of the display section matches the input surface of the input tablet (3) in terms of area and shape, and the input surface is placed on the display surface. are arranged in a superimposed manner. Furthermore, each display point (position) on the display surface corresponds to an input point (position) on the input surface located directly above it. Therefore, the input position output from the input tablet (3) substantially indicates the display position on the display surface.

Reference numeral (5) denotes a scanner, which is composed of, for example, a contact type image sensor, and outputs image data of the read document as tone pattern data. (6) is a document image memory, and this memory is stored in the scanner (5).
) is stored in the form of dot pattern data.

(7) is a change circuit, which converts the original image memory (
6) Reduce and output the image data inside.

(8) is a correction circuit, which corrects the input tablet (3) based on the reduction information a output from the main control unit (1).
Lagrange correction is applied to the output data. Specifically, when the reduction information a indicates a reduction ratio of 1/4 or less, output the data after performing the Lagrange correction,
On the other hand, if the reduction ratio is greater than or equal to the above, the data output from the input tablet (3) is output as is without Lagrange correction.

Next, Lagrange correction will be explained using FIG. 2. Such a correction is made, for example, at each point P1 indicated by a black circle in FIG.
~ When P4 and the straight line connecting these points are known,
Between points P 1 + P 3 and points P,,P.

In addition to interpolating new points p, , p, , in between, the above point P
I+P! 3. P I+ P 11+ P
1 is corrected so that it connects with a straight line as shown by the broken line in FIG.

Further, the coordinates of the interpolation point are determined from the coordinates of points adjacent to this point. Generally, four consecutive points P, PY, P,
When the coordinates of ,P, are known, the coordinates of the complementary point PY□ between PY and PZ can be found using the following formula.

PYZ=CPx+ 9 PY+ 9 Pz Pw)/
16 Returning to FIG. 6, (9) is a drawing memory, in which the vector data output from the correction circuit (8) is sequentially stored. Reference numeral (10) denotes a developing section, which develops the vector data stored in the drawing memory (9) into a dot pattern image that can be displayed on the display section (4) and outputs it.

(11) is a synthesis storage section, which stores the image data output from the change circuit (7) and displays the display section (
4), and when there is an output from the development section (10), the data is combined with the stored image data and displayed on the display section (4).

Reference numeral (12) denotes a transmitting section, which outputs the data stored in the composite storage section (11) to a telephone line or the like as facsimile data based on a transmission command from the main control section (1). At this time, if the data is reduced according to the reduction information a, it is returned to its original size and output.

Next, the operation of this embodiment will be explained.

First, when an instruction to read a document with the scanner (5) is given from the input unit (2), the main control unit (1)
The original is read and the read image data is stored in the original image memory (6).

Next, the main control unit (1) calculates a reduction rate for the image data for displaying the pattern on the display unit (4) for all the image data stored in the image memory (6), and outputs it as reduction information a. do.

In addition, the above-mentioned reduction rate is not only calculated in the main control unit (1), but also may be inputted by the user through the input unit (2). In this case, the input reduction rate is preferentially used as reduction information a. Output.

When such reduction information a is output, the change circuit (7) converts the image data in the original image memory (6) into the information a.
Reduce and output based on. As a result, the reduced image data is stored in the composite storage section (11) and displayed on the display section (4).

Further, the main control unit (1) allows the output of the reduction information a as well as input on the input tablet (3).

Therefore, it becomes possible to input an image to be added to the image displayed on the display section (4) from the input tablet (3). When such input data is received from the tablet (3), the input data is outputted to the correction circuit (8) in the form of vector data. At this point, the reduction information a has been output from the main control unit (1) to the correction circuit (8), so it is determined whether Lagrange correction is necessary based on such information, and if it is necessary, the above-mentioned This correction is applied to the vector data and the drawing memory (
9) Store inside. If the result is no, the vector data output from the input tablet (3) is stored as is in the drawing memory (9).

The vector data stored in the drawing memory (9) is converted into a dot pattern image in the expansion section (10) and output to the synthesis storage section (11). Therefore, the converted image is combined with the reduced image data already stored in the combination storage section (11) and stored, and the combined image is displayed on the display section (4).

Therefore, the user can always check on the display section (4) the image that is a composite of the image input from the input tablet (3) and the image read from the scanner (5), making it easy to make additional corrections. .

Also, the image displayed above (4) shows the transmission command that is output from the main control unit (1) in response to a transmission instruction given from the input unit (2). Based on the received information, the transmitting section (12) outputs the facsimile data as facsimile data.

Effects of the Invention According to the present invention, the drawn image inputted from the input tablet to be combined with the image data read by the scanner is stored in the form of vector data, so the storage capacity of such drawn image data is Specifically, compared to the case where the drawn image data is stored as a dot pattern image, the storage capacity may be 1730 or less.

Further, according to the present invention, when the image data read by the scanner is displayed in a reduced form on the display section, the data input from the input tablet is subjected to Lagrange correction 5t''L. .

Therefore, even if the input data is enlarged as the reduced image data is returned to its original size before being reduced, the data will never be coarsely modified with respect to the original image data.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a schematic diagram for explaining Lagrange correction. (3)...Input tablet, (4)...Display section, (
5)...Scanner, (6)...Original image memory, (7)...Change circuit, (8)...Correction circuit, (9
)...Drawing memory, (10)...Development section, (11)
...Synthetic memory section. Applicant: Sanyo Electric Co., Ltd. and one other representative Patent attorney: Takuji Nishino (two others) Figure 1 Figure 2

Claims (2)

[Claims] (1) A scanner that optically reads images, a document image memory that stores the image data read by the scanner, and an input that outputs the trajectory corresponding to the handwritten image drawn on the input surface as vector data. a tablet, a drawing memory for storing vector data output from the tablet, means for rasterizing the vector data in the drawing memory into image data, and a means for rasterizing the image data rasterized by the rasterizing means and the original image memory. What is claimed is: 1. A drawn image processing device comprising: means for synthesizing image data; and a display section for displaying the image data synthesized by the synthesizing means. (2) The apparatus according to claim 1, wherein when a handwritten image is inputted on the input tablet while the image data in the document image memory is displayed in a reduced size on the display section, the input tablet 1. A drawing image processing device further comprising a correction circuit that performs Lagrange correction on data output from the drawing image processing device.