JPH02105263A - Irregular character recording method - Google Patents

Abstract

PURPOSE:To obtain an optical image with sufficient contrast by obtaining dark output in which noncoincidence between the light source of convergence light stopped sufficiently thinly compared to irregularity and the focal point of a one-dimensional image sensor at a projecting part is obtained. CONSTITUTION:A card 7 on which an irregular character is present is irradiated by a linear thin beam of light from a convergence light source 2 generated by stopping the beam of light of a solid-state light emitting element, etc., with a bar shaped lens, etc. A lens array 3 is a lens array constituted by arranging a large number of refractive index distribution type fiber lenses, and image- forms the erecting unmagnified real image of the card 7 on the photoelectric transducing plane of the one-dimensional image sensor 1. When the card 7 is moved in a direction 8 of carrying the card i.e. the direction perpendicular to the sensor 1, the beam of light on the card 7 generates shade and shadow one after another according to the irregularity. The shade and shadow is photoelectrically transduced by the sensor 1, and furthermore, it is converted to digital data by an A/D converter 4, and after that, it is converted to data easy to record at a signal processing circuit 5, then, is recorded on an electronic file 6 with high efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image recording device, and relates to a method for recording 1% uneven characters.

[Prior art]

When characters are printed in uneven patterns, such as on cash cards, the color of each character and the background color are the same, so the characters cannot be read due to the difference in color.

Conventionally, to record characters on this type of card, pressure-sensitive paper was used to record uneven characters by applying pressure to the card.

[Problem to be solved by the invention]

In the conventional method using pressure-sensitive paper described above, a large pressure must be applied to the card and the card must be used repeatedly.The present invention aims to provide a recording method that can convert even such uneven characters into electronic information.

[Means to solve the problem]

The uneven character recording method of the present invention is characterized in that a focused light source is irradiated diagonally above the uneven characters, and in combination with a -dimensional image sensor, the highlighted shadow is recorded as an electrical signal in an electronic file.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram of a concave-convex character recording device conveniently used in an embodiment of the present invention. A card 7 having uneven characters is irradiated with a narrow linear light beam by a convergent light source 2, which is created by squeezing the light beam of a solid-state light emitting element or the like with a rod-shaped lens. The lens array 3 is a lens array formed by arranging a large number of gradient index fiber lenses, and focuses a real real image of the real magnification of the card 7 having concavo-convex characters on the photoelectric conversion surface of the one-dimensional image sensor l. When a card 7 with concave and convex characters is moved in the card conveying direction 8, that is, in a direction perpendicular to the -dimensional image sensor 1, the light flux on the card 7 follows the concave and convex patterns and creates shadows one after another.This shadow is detected by the one-dimensional image sensor. 1
photoelectrically converted.

Furthermore, after converting it into digital data using the l converter 4,
The signal processing circuit 5 converts the data into data that is easy to record, and efficiently records the data in an electronic file 6.

FIG. 2 is a vertical cross-sectional view of the uneven surface of the card 7 and the optical system, and shows the principle by which shadows are emphasized by a focused light source.

The luminous flux of the focused light and the focus of the one-dimensional image sensor 1 are made to coincide on the flat surface of the card 7 having uneven characters. Here, when the positional relationship is as shown in a, the focal point is on the plane in front of the convex portion, and the light of the light beam from the focused light source 2 is reflected and enters the -dimensional image sensor 1, and a bright output is obtained. b
.

In the case of C and d, the focal points do not match, and the reflection of the light beam from the focused light source 2 does not enter the one-dimensional image sensor 1, resulting in a dark output. e
The focused light is obstructed by the convex portion and a dark output is obtained. If it becomes f and is not inhibited, a bright output will be obtained.

When reading numbers on a bookmark, the direction of the one-dimensional image sensor coincides with the direction of the letters, but this does not pose a practical problem since the shading of the horizontal bar is slightly noticeable. Furthermore, when it is possible to make the letters diagonal, the letters can be made to stand out by making the letters diagonal, but this complicates electronic information processing.

〔Effect of the invention〕

As explained above, the present invention provides a dark output by making the focus of a focused light source that is narrow enough compared to the unevenness and the one-dimensional image sensor mismatch at the unevenness. Even if the color of the text and the background color of the card match, an optical image with sufficient conotrast can be obtained, and the electronic record of uneven text can be obtained without contact, eliminating the need to wear out cards with uneven text. effective.

Figure 1

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an uneven character reading device used in an embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of the uneven surface of the card and the optical system in FIG. 1. Explanation of symbols = 1... -dimensional image sensor, 2...
Focused light source, 3...lens array, 4...0 converter. 5...Signal processing circuit, 6...Electronic file (memory). Figure 2

Claims (1)

[Claims] 1. In a method for recording uneven characters when the background color and text color are the same, a focused light source is irradiated diagonally above the uneven characters, and the resulting shadows are converted into electronic information using a one-dimensional image sensor and a data processing circuit. , a uneven character recording method characterized by recording the image as an electronic file.