JPH0310515B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention automatically reads rough drawings and processes the read data at high speed to perform line width classification, screen correction, etc. It is used in the copy input method as a special paper for automatic handwritten drawing recognition equipment (commonly known as auto digitizer), which outputs high-precision data that is automatically removed or corrected for CAD (usually to ensure flatness, The purpose of this paper is to provide a new type of handwritten drawing paper, and the thickness, thickness,
An automatic handwritten drawing recognition device equipped with a light source that illuminates the surface of a special sheet with adjusted strength, transparency, and writing quality is used to read the reference position for drawing set on the sheet. The tracing line and the reading points on the tracing line used by the automatic handwritten drawing recognition device to memorize the above-mentioned drawing reference positions absorb colors that have the same wavelength as the color of the light irradiated by the automatic handwritten drawing recognition device. The colors of other wavelengths are printed with a special reflective ink, and a grid scale for drawing is printed on the same sheet, and the color of the same wavelength as the color of the irradiated light is reflected, and the color of other wavelengths is absorbed. The gist is that it is printed using special ink that is visible to the human eye but invisible to a handwritten drawing recognition device.

The handwritten drawing paper of the present invention has the greatest effect in enabling the above-mentioned automatic handwritten drawing recognition device (auto digitizer), and since it has tracing lines, it is not parallel to the conveyance direction in the automatic handwritten drawing recognition device. Even if the paper of the present invention is placed in the same device in the state of Handwritten drawing automatic recognition device (auto digitizer) processes line thinning,
It has the advantage of being useful for a wide range of purposes, such as vectorization processing, wide-area linearization processing, processing for expanding and contracting drawings, and correcting distortions, etc. Also, the grid scale for drawing is invisible to automatic drawing recognition equipment. Therefore, there is no fear that the drawing grid scale will get in the way or cause malfunctions during the above-mentioned processes, and other excellent effects can be achieved.

In the example shown in the figure, the same seal is attached to the outer periphery of a translucent special sheet 1 whose thickness, strength, transparency, and writing quality (using a pencil, colored pencil, ink, black ink, film writing instrument, marking pen, etc.) are adjusted. A quadrilateral frame-shaped tracing line 2 used by an automatic handwritten drawing recognition device (not shown) equipped with a light source that illuminates the surface to read the drawing reference position set on the sheet 1, and a trace line 2 on the tracing line 2. The automatic handwritten drawing recognition device uses reading points 3 of a predetermined size to be used when memorizing the above-mentioned drawing position, respectively, absorbing colors of the same wavelength as the color of the light irradiated by the automatic handwriting drawing recognition device and absorbing colors of other wavelengths. The colors are printed using a special reflective ink, and a drawing grid 4 passing through the reading points 3 above is printed on the same sheet 1. Colors with the same wavelength as the color of the irradiated light are reflected, and colors with other wavelengths are absorbed. It is printed using special ink that is visible to the human eye but invisible to automatic handwritten drawing recognition equipment.

Incidentally, the reason why the length, size, and shape of the reading point 3 are set to a predetermined size is that it is necessary to distinguish it from noise, and for example, to prevent misreading when there is a drawing line that crosses the tracing line 2. In addition, the reason why the interval between the reading points 3 is narrowed, that is, the number of reading points 3 is increased is to improve accuracy and increase each of the above-mentioned processing capabilities.

[Brief explanation of drawings]

The figure shows an embodiment of the handwritten drawing paper for the automatic handwritten drawing recognition device of the present invention, and is a plan view of the whole. 1...sheet, 2...tracking line, 3...reading point,
4...Graphic scale for drawing.

Claims (1)

[Claims] 1. An automatic handwritten drawing recognition device equipped with a light source that illuminates the outer edge of a special sheet whose thickness, strength, transparency, writing quality, etc. have been adjusted, and which illuminates the surface of the sheet reads the drawing reference position set on the sheet. The tracing line used for this purpose, and the reading point on the tracing line used by the automatic handwritten drawing recognition device to memorize the above-mentioned reference position for drawing, have the same wavelength as the color of the light irradiated by the automatic handwritten drawing recognition device. Printed using special ink that absorbs colors of wavelengths and reflects colors of other wavelengths.
Furthermore, on the same sheet, there is a grid scale for drawing, which reflects colors with the same wavelength as the color of the irradiated light and absorbs colors with other wavelengths.It is a special feature that is visible to the human eye but invisible to the automatic handwritten drawing recognition device. A handwritten drawing paper for use in an automatic handwritten drawing recognition device, characterized in that it is printed with ink.