JPH04123649U - Facsimile device with light source color selection function - Google Patents

Abstract

(57) [Summary] [Purpose] To enable a facsimile device to reliably read image information of a specific color by simply selecting an irradiation light source corresponding to the specific color included in the image information of a transmitted document. [Configuration] Multiple irradiation light sources 10a, 10b with different emission colors
and a light source selection means 11 that selectively drives one of the irradiation light sources 10a and 10b according to the image color and shading of the image information written on the transmission document P, and the transmission irradiated by the selectively driven irradiation light source. The image reading section 1, 1' includes an image sensor 12 that receives reflected light from a document and converts and outputs an electrical signal according to the amount of reflected light.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a facsimile machine having a light source color selection function. Even if the sent document contains image information of a specific color or the image is pale, the image information The invention is characterized by the fact that information can be reliably read.

0002

[Conventional technology]

Recently, facsimile machines that send and receive image information via telephone lines have become popular. Although these facsimile machines have been developed and used The image reading unit 100 for reading the image information of the transmitted document is as shown in FIG. , while conveying the transmission document P in the sub-scanning direction (direction of the arrow) with the conveyance roller R. The irradiation light source 101 emits light, the reflected light is reflected by a mirror M, and the lens L condenses the light. In addition to the image sensor (such as a solid-state image sensor such as a CCD) 102, depending on the amount of reflected light, The resulting electric signal is converted into a predetermined electric signal by the binarization circuit 103. The signal is converted into black and white based on the threshold value and transmitted to the encoding circuit for transmission processing. ing.

0003 By the way, among the various colors that can be seen with the naked eye, white (red, green, blue, etc.) ) reflects the red, green, and blue wavelength components of the irradiation light source as they are, and black Color absorbs all of the irradiating light source, and red absorbs all but the red wavelength component of the irradiating light source. Only the red wavelength component is reflected, and the green color is green by absorbing components other than the green wavelength component of the irradiation light source. Only the wavelength components of the colors that can be seen with the naked eye are reflected. It has the basic characteristics of

0004 For this reason, for example, as shown in FIG. 5(A), the red letter R is written ( The transmitted document P (with a stamp or stamp) has wavelength components (700 When irradiated with a red light source with In the red part described, red light is reflected without being absorbed, while in the margin part W, red light is reflected. Because the irradiated red light is reflected, it is not written in the area where the letter R is written. There is no difference in the amount of reflected light from the margin area W, and the electrical signal is converted and output from the image sensor. does not include the image information of the letter R. In other words, stamps etc. When an image is scanned by illuminating a red light source on a document, black areas etc. are not included as image information. Although it is read, the image information in the red stamped part is not read and is lost.

[0005] To avoid such inconvenience, a green light source is usually used as the irradiation light source 101. The green light source is absorbed in the red stamped area, reducing the amount of reflected light, and the margin area is In the minute, the green light source is reflected as is, so there is sufficient reflection between the red area and the margin area. It is possible to read accurate image information by obtaining the difference in light amount.

[0006] However, as shown in Figure 6(A), the sent document with the green letter G written on it P is illuminated with a green light source having a wavelength component (546 nm) as shown in Figure 6(B). As shown in Figure 6(C), the green part where the letter G is written is green. While the colored light is reflected without being absorbed, the green light irradiated by the blank area W is also reflected. Therefore, the difference in the amount of reflected light between the area where the letter G is written and the blank area W where it is not written. disappears, and the electrical signal converted and output from the image sensor has a , the image information for the green letter G was no longer included.

[0007] For this reason, regular facsimile machines that use a green light source cannot display red image information. On the other hand, blue and green image information copied on carbon paper, etc., and black Even if it is written in , thin image information cannot be read sufficiently, so this If the original to be sent contains image information such as However, it is necessary to make the original sufficiently black before sending it, which is time-consuming and Improvements were desired since copying paper was wasted.

[0008]

[Problem that the idea aims to solve]

The present invention, proposed in view of the above circumstances, is to By simply selecting the appropriate illumination light source, you can reliably read image information for a specific color. To provide a facsimile machine with improved operability and reliability. The purpose is to

[0009]

[Means to solve the problem]

The present invention proposed to achieve the above purpose uses multiple irradiation lights with different emitted colors. Either of the above irradiations will be applied depending on the source and the image color and shading of the image information written in the transmitted document. a light source selection means for selectively driving the light source; and a light source selection means for selectively driving the light source; An image sensor that receives the reflected light from the transmitted original and converts it into an electrical signal according to the amount of reflected light. The configuration includes an image reading section including a child.

0010

[Effect]

In this invention, the light source selection means is manually operated to selectively select irradiation light sources with different emission colors. It can be driven to Therefore, if the sent document contains red image information such as a stamp, For example, if you select an irradiation light source that emits green light, the red stamped area will not be visible. The green light source is absorbed, and the green light source is reflected as it is in the margin, creating a sufficient amount of reflected light. Since there is a difference, the image information of the red stamped portion can be read reliably. Also , the sent document contains green or blue image information printed on carbon paper, etc. If the image information is weak, for example, select an illumination light source with a red emission color. For example, the red light source is absorbed even in green image areas or areas where image information is weak, and in the margins, the red light source is absorbed. The red light source is reflected as it is and there is a sufficient difference in the amount of reflected light, so green or thin areas image information can be reliably read.

[0011]

【Example】

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1(A) schematically shows the image reading section 1 of the facsimile device of the present invention. In the figure, 10a and 10b are lines with green and red luminescent colors, respectively. 11 is a light source selection means having a light source changeover switch 11a; M is an irradiation light source; The reflected light from the transmission document P illuminated by the light source 10a or 10b is directed to the lens side, which will be described later. The reflecting mirror L focuses the light reflected by the mirror M onto an image sensor to be described later. 12 is an image sensor that outputs an electric signal according to the amount of light focused by the lens L. (a CCD is used in this invention), and 13 is the electric current output from the image sensor 12. Binarization that converts the image signal into a black and white binary pixel signal at a predetermined threshold level. It is a circuit. Note that R is a drive for conveying the transmission document P in the sub-scanning direction (direction of the arrow). It is a moving roller.

0012 When the light source selector 11 switches the light source selector switch 11a to the contact a side, the light source selector 11 turns on the light source. When the light source 10a is ready to be driven and transmits a facsimile, the green light is used to transmit the facsimile. When the original document P is illuminated and the light source selector switch 11a is switched to the contact b side, , when the irradiation light source 10b is ready to be driven, red light is emitted during facsimile transmission. The transmission original P is irradiated with the light.

[0013] FIG. 1B schematically shows a configuration example of another image reading section 1'. In the configuration shown in FIG. 1(A), the lens L and the image sensor 12 are arranged in the center. At the same time, it has a configuration in which irradiation light sources 10a and 10b are placed on both sides of the light source. Since the constituent elements are the same except for the omission of ``M'', they will be described with the same reference numerals. Omit the description.

[0014] According to the image reading sections 1 and 1' having such a configuration, as shown in FIG. 2(A), , if green characters G are written on the sent document P, or the density of the written characters is too light. If not, switch the light source selector switch 11a to contact b side as shown in FIG. 2(B). If the red light source 10b with a wavelength of 700 nm is driven, as shown in FIG. However, because the red light is absorbed by the green letter G, the amount of reflected light decreases, while the margin Since the red light is directly reflected in the part W, the reflection between the green character G and the blank part W This ensures sufficient light intensity difference, allowing the image sensor 12 to accurately read image information. It is possible to take it.

[0015] In addition, as shown in FIG. 3(A), the red letter R is written on the transmitted document P. 3, switch the light source selector switch 11a to the contact a side as shown in FIG. 3(B). If the green light source 10a with a wavelength of 564 nm is driven, as shown in FIG. However, because the green light is absorbed by the red letter R, the amount of reflected light decreases, while the margin Since the green light is reflected as it is in the part W, the reflection between the red character R and the blank part W This ensures sufficient light intensity difference, allowing the image sensor 12 to accurately read image information. It is possible to take it.

[0016] As described above, according to the facsimile device of the present invention, irradiation with a plurality of emitted colors is possible. A simple configuration with a light source that can be switched, allows you to print out red stamps, etc. on sent documents. If colors are included, select the green light source, and conversely, if the original to be sent is written in green carbon. If the image is dark or pale, select a red light source. Image information can be read accurately by simply selecting the emitted light color of the irradiation light source according to the colors contained in the image. It becomes possible to take it.

[0017] In addition, in the above explanation, the configuration is described as having a red light source and a green light source. , by having a configuration equipped with irradiation light sources of three or more different emission colors, red It is possible to accurately read image information of sent documents that contain specific colors other than green or green. becomes.

[0018]

[Effect of the idea]

As can be understood from the above explanation, the facsimile machine with the light source color selection function of the present invention According to the Milli device, by having a configuration in which a plurality of irradiation light sources can be selected by the light source selection means, If the sent document has a red stamp, a green stamp, or a faint stamp, Even if the original is sent, the image information of the transmitted document can be changed by simply selecting and setting the irradiation light source using the light source selection means. This allows you to accurately read and send information, so you can copy the original and print it in black. Eliminates the need to create a manuscript before sending it, reducing wasteful consumption of copy paper. can.

[Brief explanation of drawings]

FIGS. 1A and 1B are schematic diagrams showing an image reading section of a facsimile apparatus according to the present invention.

2A to 2C are diagrams illustrating the amount of reflected light when the image reading unit shown in FIG. 1 illuminates a transmission document written in green with a red light source;

3A to 3C are diagrams illustrating the amount of reflected light when the image reading unit shown in FIG. 1 illuminates a transmission document written in red with a green light source;

FIG. 4 is a diagram illustrating a configuration example of an image reading section of a conventional facsimile device.

5A to 5C are diagrams illustrating the amount of reflected light when the image reading section shown in FIG. 4 illuminates a transmission document written in red with a red light source; FIG.

6A to 6C are explanatory diagrams of the amount of reflected light when the image reading unit shown in FIG. 4 illuminates a transmission document written in green with a green light source;

[Explanation of symbols]

1 Image reading section 10a, 10b irradiation light source 11 Light source selection means 11a Light source selection switch 12 Image sensor P Transmission manuscript

Claims (1)

[Scope of utility model registration request] 1. A plurality of irradiation light sources that emit light of different colors, and a light source selection means for selectively driving one of the irradiation light sources according to the image color and shade of image information written on a transmission document;
A facsimile machine having a light source color selection function and having an image reading section that includes an image sensor that receives reflected light from a transmission document irradiated by a selected irradiation light source and converts and outputs an electrical signal according to the amount of reflected light. .