JPH0388562A - Image input device - Google Patents

Abstract

PURPOSE:To input an image being free from a horizontal shift and an inclination even if a horizontal shift and the inclination of an image caused by a misalignment of an optical system is generated by interlocking a display means for reflecting an image projected by a film image projecting device with an aligning means. CONSTITUTION:When a screen 153 for reflecting an image projected by a projector 100 is fixed to a fixed scale 50 so as to be interlocked, and a relative position relation of the fixed scale 50 and an optical system is adjusted at the time of copying a usual document D, a position relation of the screen and the optical system at the time of copying by the projector 100 can also be adjusted. In such a way, even if a horizontal shift and the inclination caused by a misalignment of the optical system are generated, when the fixed scale 50 is adjusted in advance, an image being free from a horizontal shift, and the inclination can be inputted without adjusting a screen unit 150 again.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (Industrial Field of Application)] The present invention relates to an image processing apparatus for manually processing an image formed on a film, which is applied to, for example, an image scanner or a copying machine.

(Prior Art) In recent years, color copying machines using digital technology and thermal transfer type ink ribbons have been developed and put into practical use.

In addition to reading the image of a document placed on a document table and forming an image, such a copying machine also uses a projector to project an image on a film onto a screen placed on the document table, and then uses a scanner to scan this screen. Devices equipped with an image input device that inputs images by scanning have been developed.

Such a human-powered image device illuminates a film loaded in a projector with a light source, and guides the light transmitted through the film to a screen unit using a projection lens.
A mirror installed in this screen unit changes the optical path and projects it onto a screen placed on the document table, and this projected image is scanned as if reading a document placed on the document table. It is now possible to input images using

However, if, for example, a lateral shift or tilt of the image occurs due to a positional shift in the optical system of the image input device, in the case of normal document reading, the position of the document scale, which brings the document into contact and aligns it, must be adjusted to correct the above-mentioned lateral shift. However, since the screen unit is fixed to a predetermined part of the image input device, the image projected on the screen unit is read with lateral deviation or tilt. was there.

(Problems to be Solved by the Invention) As described above, the present invention provides a method for fixing the screen unit to a predetermined position of the image input device when a horizontal shift or tilt of the image occurs due to positional shift of the optical system of the image input device, for example. This was done to eliminate the drawback that the image projected onto the screen unit is read with lateral deviation or tilt. An object of the present invention is to provide an image input device capable of manually inputting an image without lateral shift or tilt even if tilt occurs.

[Structure of the Invention] (Means for Solving the Problems) The image input device of the present invention inputs an image by optically scanning a document on a document table, guiding the document to a photoelectric conversion means by an optical system, and photoelectrically converting the document. In the human-powered image apparatus, a positioning means for aligning the position of a document placed on the document table, an adjusting means for adjusting the position of the positioning means with respect to the optical system, and the positioning adjusted by the adjusting means. a first reading means for reading the original aligned by the means;
A film image projecting device for projecting an image of a film original, a display device linked to the positioning device for projecting the image projected by the film image projecting device, and scanning the image on the display device to read the film image. It is characterized by comprising a second reading means.

(Function) The present invention is an image input device that inputs an image by optically scanning a document on a document table, guiding it to a photoelectric conversion means by an optical system, and photoelectrically converting the document. For example, if the display means to be copied is fixed to the positioning means so as to be interlocked with the positioning means, and the relative positional relationship between the positioning means and the optical system is adjusted during normal copying of originals, copying by a film projection device is possible. In this case, the positional relationship between the display means and the optical system can also be adjusted. As a result, even if a lateral shift or tilt of the image occurs due to positional shift in the optical system, as long as the alignment means is adjusted, it is possible to manually produce an image without lateral shift or tilt without having to readjust the display means. There is.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 2 shows a thermal transfer color copying machine to which the image input device of the present invention is applied and is capable of selectively making multicolor copies. That is, 1 is a main body of a copying machine, and an operation panel (not shown) is provided at the front of the upper surface of the main body 1. The upper part of main body 1 is a manuscript table (transparent glass).
A document scanning section 3 scans and reads a document set on the document tray 2, and an image forming section 4 is provided at the bottom. Note that 5 is a document cover provided on the document table 2 so as to be openable and closable.

Further, the document table 2 is fixed to the main body 1.

3(a), (
As shown in b), a fixed scale 50 is provided as a reference for setting the document tray. The fixed scale 50 is composed of a transparent part and a white opaque part. Pointers 51 and 52 as size indicators are opposed to the transparent portion. This guideline 51.52 is the third
As shown in Figure (b), it is fixed to a belt 57 that is stretched between pulleys 54 and 55. The pulley 55 is rotated by a motor 58, and the distance between the pointers 51 and 52 is changed by driving the rotation of the motor 58 according to the set paper size, magnification, etc. It looks like this. This guideline 51.5
The range indicated by 2 is the width in the vertical direction as the copyable range. Note that 156 is a bin for attaching a screen unit 150, which will be described later.

The position of the fixed scale 50 can be adjusted. In other words, in addition to deviations in the scanning optical system such as misalignment of the scanning mirror and misalignment and tilt of the lens, there are also misalignments between the running position of the paper P and the image forming position when connected to the image forming section. Due to several reasons, a problem arises in which the image cannot be formed at the correct position on the paper P. Therefore, by adjusting the position of the fixed scale 50 and aligning the paper P with the adjusted fixed scale 50, copying can be performed in the correct position. It is now possible to form images at certain positions. for example,
As shown in FIG. 11(a), the position where the image G is formed is on the upper side of the paper P, and as shown in FIG. 11(b), the position where the image G is formed is on the paper P. If it is at the bottom in the figure, the adjustment mechanism 157 moves the fixed scale 50 in the direction of the arrow shown in the figure (front side or rear side) so that the image G is in the center of the paper P, as shown in FIG. Adjust to. For example, as shown in FIGS. 12(a) and 12(b), if the position where the image G is formed is tilted with respect to the paper P, the adjustment mechanism 1
57, the fixed scale 50 is moved in the direction of the solid line arrow or the dotted line arrow shown in the figure to adjust the image G and the paper P to be parallel to each other.

Such adjustment allows the image G to be copied at the correct position on the paper P.

Furthermore, five white reference plates are provided on the upper surface of the end of the document table 2 below the fixed scale 50.

The document scanning section 3 is configured as shown in FIG. 4, for example. That is, the first lamp is equipped with the illumination lamp 6 as a light source.
A carriage 7, a second carriage 8 that bends the optical path with a mirror, a lens 9, and a photoelectric converter 1 that converts the reflected light from the document tray.
1, and a mirror part 10 that corrects the optical path length when changing the magnification;
It is comprised of a photoelectric converter 11 that receives reflected light from a document plate, and a drive system (not shown) that changes the positions of these parts.

The first carriage 7 includes an illumination lamp 6 that irradiates light onto the document tray, a glue deflector 12 that serves as a reflector that collects the light from the illumination lamp 6 onto the document surface, and a second carriage that directs the reflected light from the document tray. A mirror 13 that guides the camera to the 8 side is mounted.

Mounted on the second carriage 8 are mirrors 8a and 8b that guide the light guided by the mirror 13 to the lens 9. The first and second carriages 7.8 are connected to each other by a timing belt (not shown), and the second carriage 8 moves in the same direction at 1/2 the speed of the first carriage 7. . This makes it possible to scan while keeping the optical path length up to the lens 9 constant.

The lens 9 has a fixed focal length and is moved in the optical axis direction when changing the magnification. This lens 9 may be composed of a variable focal length lens such as a zoom lens.

The mirror portion 10 has two mirrors 10a.

10b, and those mirrors 10a according to the change in optical path length corresponding to the selected magnification ratio.

The position of the lens 10b is changed, and by bending the optical path of the light from the lens 9 with the two mirrors 10a and 10b, the light is guided to the photoelectric converter 11.

The photoelectric converter 11 converts the image on the original into cyan, green, and
It separates and outputs yellow (or red, green, or blue) light as a color signal, and is mainly composed of, for example, a CCDCD billline image sensor. In this case, one pixel of the document is formed by three consecutive elements (CS) of the CCD sensor.
G.Y.

or R, G, B). The photoelectric converter 11
The output is supplied to an A/D converter 91, which will be described later.

0 The above first and second carriages 7.8, lens 9, mirror 1
0a and 10b are each moved using a stepping motor (not shown) as a driving source. As shown in FIG. 5, the first and second carriages 7.8 are timing belts that are stretched between a drive pulley 14 connected to the rotating shaft of the stepping motor and idler pulleys 15 and 16. It is designed to be moved in response to one action. The mirrors 10a, 10b and lens 9 are each moved by separate stepping motors (not shown). The lens 9 is connected to a spiral shaft (
(not shown) rotates and is moved in the optical axis direction by this spiral movement.

The image forming section 4 is configured as shown in FIG. 2, for example. That is, the platen drum 22 is disposed approximately at the center of the image forming section 4 . The platen drum 22 has a periphery made of an elastic material such as rubber, and functions as a platen roller for the thermal head 24. The platen drum 22 wraps the paper P around its circumferential surface by rotating itself in the direction of the arrow A in the figure, and during overlay printing, the platen drum 22 wraps the paper P around its circumferential surface.
prevents it from shifting.

Around the platen drum 22, sheets of paper P are placed at predetermined intervals.
Pressure rollers 25, . The circumference of the platen drum 22 is slightly longer than the length in the longitudinal direction of the maximum paper size.

A thermal head 2 is located below the platen drum 22.
4 are arranged. The thermal guide 24 is attached to a heat radiator integrally formed on the rear end surface of the holder. An ink ribbon 26 as an image forming medium is interposed between the platen drum 22 and the thermal head 24. The cores 30 and 31 of the ink ribbon 26 are connected to a drive shaft of a motor (not shown) via a drive force transmission mechanism (not shown), and are rotated as required.

2 Further, a paper feed roller 41 is provided at the lower right portion of the main body 1, and is configured to take out sheets of paper P as an image forming medium stored in the paper feed cassette 20 one by one. . The paper P taken out by the paper feed roller 41 is transferred to the platen drum 2 via a guide 43 by a transport roller 42.
2, gripper 23, pressing roller 25
, . . ., the paper is wound around the platen drum 22, thereby making it possible to convey the paper accurately. Here, the paper feed cassette 20 is detachable from the side of the main body 1. Note that 46 in FIG. 2 is paper P.
This is a manual paper feeding device for manually feeding paper such as paper. The paper P fed from the manual paper feeder 46 is also wound around the platen drum 22 in the same manner as described above.

The paper P, whose leading end is fixed by the gripper 23, is wound around the platen drum 22 by rotation in the direction of arrow A in the figure, and after the leading end passes through the printing area, the thermal head 24 is pressed against the platen drum 22, and printing is performed. will be held.

3. When printing of the first color is completed, the platen drum 22 has made approximately one revolution. Here, the thermal head 24 is once released, the ink ribbon 26 is wound up, and the next color is located.

Then, the platen drum 22 starts rotating again in the direction of arrow A in the figure, printing is performed by the thermal head 24, and the next color is overprinted (printed).

In this manner, in the case of full-color copying, image formation is performed by four operations of yellow, magenta, cyan, and black, or three operations of yellow, magenta, and cyan.

In the case of a single color such as black, it is performed in one operation.

When ejecting paper, the platen drum 22 is rotated in the direction of arrow A in the figure until it reaches the rear end of the paper P or the guide 27 for paper ejection, and when it reaches the rear end of the paper P, the platen drum 22 is rotated in the direction of arrow B in the figure. The rear end of the paper P is separated from the platen drum 22 by a separation claw (not shown), and the paper discharge guide 27 is rotated.
lead to. Finally, the tip of the paper P is held by the gripper 23.
The paper P that has been copied is released from the paper discharge guide 27 and is discharged onto the paper discharge tray 28 .

FIG. 6 schematically shows the overall control system, which includes a main control section 81, a first sub-control section 82, and a second sub-control section 83. The main control unit 81 includes an operation panel 80, a memory 9
9, each connected to a correction circuit 84, a luminance/color difference separation circuit 85, an image quality improvement circuit 86, a color signal conversion circuit 87, a binarization circuit 88, a control board 200, a first sub-control section 82, and a second sub-control section 83. , is in charge of these controls.

The first sub-control unit 82 is connected to a light source control unit 89, a motor drive unit 90, a photoelectric converter 11, an A/D converter 91, and a resolution conversion unit 92, and controls these units. ing. The light source control unit 89 is connected to the illumination lamp 6 and performs breath control and light amount control thereof. That is, the illumination lamp 6 is turned on during a normal image reading operation. The motor drive section 90 drives the scanning motor 18.

The second sub-control unit 83 includes a thermal head temperature control unit 93, the thermal head 24, and various detection switches 9.
4 and a drive unit 95, respectively, to control these. The drive unit 95 is connected to a drive system 96 such as a motor and a solenoid, and drives the drive system 96 .

The control board 200 controls the projector 100, and details will be described later.

The memory 99 stores reference data obtained by A/D converting the light reflected by the five color reference plates.

The correction circuit 84 standardizes (shading correction, that is, the variation of the photoelectric converter 11 correction).

Further, the color signal conversion circuit 87 will be explained in more detail with reference to FIG. Luminance signal (1), color difference signal 1 (CI), and color difference signal 2 sent from the image quality improvement circuit 86
Each signal (C2) is sent to a color signal conversion circuit 87, and this color signal 6 conversion circuit 87 sends out any one of Y, M, C, and B color signals to a binarization circuit 88. . At this time, the above YS
The selection of M, C, and B color signals is performed by the main control section 81. That is, as shown in the table below, the main control unit 81
are Y, M, and C sent to the binarization circuit 88 by the combination of signals a and b.

The B color signal is selected. The above color signal selection is as follows:
Automatically selected sequentially (e.g. Y-M-C→B order)
It has become so.

Table 1 Next, a configuration for reading an image of a film original according to the present invention will be described. FIG. 8 is an external perspective view of a copying machine when a projector 100 and a screen unit 150 are attached when reading an image of a film original, and FIG. FIG.

The projector 100 is configured so that the cross section and external appearance are shown in FIGS. 1 and 13, respectively, and the copying machine main body 1
The same article remains. That is, lamp house 101
A halogen lamp 102 is housed as a light source, and the light emitted from the halogen lamp 102 is focused by a condenser lens 103 and irradiated onto a film 104 held in a holder (not shown). .

The light transmitted through the irradiated film 104 is projected onto the screen unit 150 by the projection lens 105. Also, inside the projector 100, there is a cooling fan 120 (not shown) (see FIG. 14).
is provided, and a halogen lamp 102 and a film 1 are provided.
It is designed to cool the 04.

Further, an operation panel 10 is provided on one side of the projector 100.
6 is provided. This operation panel 106 includes a mode selection switch 107 and an indicator 8 108 that shows the selected state of this moto selection switch 107, and a negative/positive changeover switch 108 and an indicator 110 that shows the switching state of this negative/positive changeover switch 108. is provided. The above mode selection switch 10
7 is for selecting the normal copy mode or the projector mode, and each time the button is pressed, the normal copy mode and the projector mode are selected alternately, and when the projector mode is selected, the display 108 is now lit. The selection state of this mode selection switch 107 is sent to the control section of the copying machine. Further, the negative/positive changeover switch 108 changes whether the loaded film 104 is a positive film such as a slide film, or a negative film, and each time it is pressed, the switch changes between negative and positive. The switches are alternately switched, and the display 110 is turned on according to each switch state. The switching state of this negative/positive changeover switch 108 is also sent to the control unit of the copying machine, and is used to decide whether or not to perform image processing to convert a negative film into a positive image, which will be performed later. It is now used to judge whether

The power supply and signal transmission and reception to the projector 100 are performed by a control board 200 (first
(see figure). That is,
DC power and various signals to the projector 100 are supplied through a signal cable S1, and AC power and various signals to the control section of the copying machine are supplied through a signal cable S2. FIG. 14 shows the power supply system and signal wiring state between the copying machine main body 1 and the projector 100.

FIG. 15 shows the operation panel 10 of the projector 100.
6 shows the electrical circuit of No. 6. That is, the mode selection switch 107 outputs a mode selection signal, and the negative/positive changeover switch 109 outputs a negative/positive changeover signal, which are output to the main control section 81 of the main body 1. Further, a projector mode signal, a positive film signal, and a negative film signal are sent from the main control section 81 of the main body 1 to control the lighting of the indicators 108 and 110. Note that only one of the two indicators 110 is turned on, contrary to the above.

The screen unit 150 is configured as shown in the cross section and appearance in FIGS. 1 and 8, respectively, and is adapted to be detachably attached to the fixed scale 50 of the copying machine main body 1. That is, the screen unit 150
A mirror 151 mainly reflects the optical path of the light output in the horizontal direction from the projection lens 105 of the projector 100 and converts it into the vertical direction.
It is composed of a Fresnel lens 152 that collapses the optical path of the transmitted light in a direction perpendicular to the document table, and a screen 153 that reflects the light transmitted through the Fresnel lens 152. Further, as shown in FIGS. 9 and 10, a mounting member 155 is provided at the end of the screen unit 1'50, and a hole provided in this member 155 is provided at the end of the fixed scale 50. The screen unit 150 is attached to the fixed scale 5 by fitting it into the pin 156 provided on the fixed scale 5.
It is designed to be attached to 0. Therefore, as mentioned above, in order to correctly read the image on the document sheet, the fixed scale 50 corrects the misalignment and tilt between the image G and the paper P.
If the position adjustment is performed, the position adjustment when copying a film image can be performed at the same time.

Next, the operation in the above configuration will be explained. First, the case of reading a normal document will be explained. First, the operator removes the screen unit 150 from the document table 2. Then, the operation panel 1 of the projector 100
Operate the mode selection switch 107 of 06 to set the normal copy mode. As a result, the mode is set in which the document on the document table 2 is scanned and the image is read. Next, the operator specifies copying conditions such as magnification using the operation panel of the main body 1. Then, the main control unit 81 determines the copyable range (width in the vertical direction) based on the size of the paper P in the paper feed cassette 20 and the copying magnification, and drives the motor 58 in accordance with the result of this determination. As a result, the 2 hands 51 and 52 are moved to indicate the copyable range determined by the specified copying conditions and the size of the paper P.

In response to this instruction, the operator places the document tray and presses a copy start key (not shown). Then, the main control unit 81 drives the motor 58 to move the pointers 51 and 52 to a position equal to or larger than the maximum document width (for example, 297 mm for A3 size), that is, to a non-image area. The main control unit 81 also controls the illumination lamp 6.
is turned on, and the first and second carriages 7.8 are moved.

As a result, the light from the illumination lamp 6 is applied to the five white reference plates and the document plate via the document table 2.

The reflected light from these white reference plate 59 and original plate is reflected by mirrors 13, 8a, 8b, lens 9, and mirrors 10a, 10b.
are guided to the photoelectric converter 11 via the . This photoelectric converter 11 separates the light into analog color signals of cyan (C), green (G), yellow (Y), or red (R), green (G), and blue (B). /D converter 91. The A/D converter 91 converts these three analog signals of each color into digital signals. The signal from the white reference plate 59 from the A/D converter 91 is stored in the memory 99 as reference data. The original signal from the A/D converter 91 is output to the resolution converter 92.

The resolution conversion unit 92 performs resolution conversion to match the resolution of the photoelectric converter 11 and the resolution of the thermal head 24, and sends the result to the correction circuit 84. At this time, if the resolutions of the photoelectric converter 11 and the thermal head 24 are the same, the above resolution conversion process is omitted. Correction circuit 8
4 are C, G, Y, sent from the resolution converter 92;
Alternatively, each color signal of RG and B is standardized using the reference data stored in the nine memories, that is, correction processing (shading correction) is performed to correct variations in the photoelectric converter 11, and the result is The luminance color difference separation circuit 85
send to The luminance color difference separation circuit 85 receives C and G signals sent from the correction circuit 84.

Various arithmetic processing is performed on each color signal of Y, R, G, and B, and the signals are separated into a luminance signal (I), color difference signal 1 (CI), and color difference signal 4 (C2), and the image quality improvement circuit 8
Send to 6. The image quality improvement circuit 86 includes a luminance color difference separation circuit 85
The luminance signal, color difference signal 1, and color difference signal 2 sent from the processor are analyzed, subjected to image quality improvement processing such as edge emphasis and character identification, and sent to the color signal conversion circuit 87. Color signal conversion circuit 87
performs color conversion based on the luminance signal, color difference signal 1, and color difference signal 2 that have been subjected to image quality improvement processing, and converts yellow (Y), magenta (M), cyan (C), and black (B) [when printing The three primary colors (Y, M, C) plus B] are converted into a color signal (signal corresponding to the density), and the binarization circuit 88
send to The binarization circuit 88 receives the color signals (Y, M, etc.) sent from the color signal conversion circuit 87.

C, B) is subjected to area gradation conversion, that is, binarization, by a dither method or the like, and the binarized signal is sent to the thermal head temperature control section 93. The thermal head temperature control section 93 sends a print signal to the thermal head 24 based on the binarized signal supplied from the binarization circuit 88 .

Further, in response to the input of the copy start key (not shown) 5, the paper P in the paper feed cassette 20 is transferred to the paper feed roller 4.
1, the taken out paper P is transported by a transport roller 42, guided to the platen drum 22 via a guide 43, and its leading end is fixed by a gripper 23. As a result, the paper P is wound around the platen drum 22.

In response to this state, the thermal head 24 is brought into pressure contact with the platen drum 22, and prints (that is, forms an image) on the paper P wound around the platen drum 22 in accordance with the print signal. Then, repeat the above operation as Y,
A full-color image is formed by repeating the process for each of the M, C, and B colors.

When the printing is finished, the main control section 81 turns off the illumination lamp 6, discharges the paper P wound around the platen drum 22, and ends the copying operation.

Next, the operation when reading an image of a film original will be explained. First, the operator attaches the screen unit 150 to the top 6 of the document table 2. At this time, assuming that the fixed scale 50 is adjusted so that the image G and the paper P are in the correct position, there is no need to adjust the position of the screen unit 150. Then, the mode selection switch 1 on the operation panel 106 of the projector 100
07 and set it to projector mode. As a result, the halogen lamp 102 of the projector 100 is turned on, and the screen 153 of the screen unit 1.50 is turned on.
The mode is set to scan the image projected on the screen and read the image. Next, the operator specifies copying conditions such as magnification using the operation panel of the main body 1. At this time, the main control section 81 does not move the hands 51 and 52 indicating the copyable range.

Next, the operator transfers the film original 14 to the projector 100.
, and insert a copy start key (not shown). Then, the main controller 81 turns on the first,
Move the second carriage 7.8. Thereby, the light from the film original 104 of the projector 100 projected onto the screen 153 is guided to the photoelectric converter 11 via the mirror 13 + 8 a , the 8 b s lens 9 , and the mirrors 10 g and 10 b in this order. At this time, the white reference signal used for shading correction is obtained not from the five white reference plates provided on the fixed scale 50 but from a predetermined portion of the screen 153.

The light transmitted through these white reference signals and the screen 150 and guided to the photoelectric converter 11 is converted into cyan (C), green (G), yellow (Y), or red (R) in the photoelectric converter 11. The signal is separated into green (G) and blue (B) analog color signals and sent to the A/D converter 91. The A/D converter 91 converts each analog color signal into a digital signal. This A/D converter 91
The white reference signal from is stored in nine memories as reference data. Then, the signal of the film original 14 from the A/D converter 91 is output to the resolution converter 92. The subsequent operations are the same as those for reading the above-mentioned normal original document, so a description thereof will be omitted. In addition, film original 14
is negative film 8 , the main control unit 81 is notified of this by a negative/positive switching signal from the negative/positive switching switch 109 provided on the operation panel 106 of the projector 100 . Image processing to convert the image into a positive image is performed under the control of the .

As described above, in an image input device that inputs an image by optically scanning the document on the document table 2, entering the optical system consisting of mirrors and lenses, and guiding it to the photoelectric converter 11 for photoelectric conversion, the projector 100 By fixing the screen 153 that displays the projected image to the fixed scale 50 so that the screen 153 is interlocked with the fixed scale 50, and adjusting the relative positional relationship between the fixed scale 50 and the optical system during normal original copying, the copying by the projector 100 can be easily performed. Since the positional relationship between the screen and the optical system can also be adjusted, even if the image shifts horizontally or tilts due to positional deviation of the optical system, the screen unit 150 can be re-adjusted as long as the fixed scale 5o is adjusted. It is said that it is possible to input images without horizontal shift or tilt without adjustment.

[Effects of the Invention] As detailed above, the present invention provides an image input device capable of inputting an image free from lateral deviation or inclination even if the lateral deviation or inclination of the image occurs due to positional deviation of the optical system. can.

[Brief explanation of drawings]

The figures are for explaining the present invention in detail, and FIG. 1 is a diagram showing the structure of the main parts of an image input device, FIG. 2 is a sectional view schematically showing the overall configuration of the copying machine, and FIG. Fig. 3 is a diagram for explaining the arrangement of the pointer and the white reference plate, Fig. 4 is a diagram for explaining the main part of Fig. 2, and Fig. 5 is a schematic perspective view showing a part of the configuration. , FIG. 6 is a block diagram schematically showing the overall control system, FIG. 7 is a block diagram for explaining the color signal conversion circuit in detail, and FIG. 8 is a perspective view of the external appearance when the projector is installed. Figure 9 is a perspective view for explaining the combined state of the fixed scale and screen unit;
Figure 0 is a cross-sectional diagram to explain the combined state of the fixed scale and screen unit, Figure 11 is a diagram to explain the misalignment of the image and paper and how to correct it, and Figure 12 is the tilt of the image and paper. FIG. 13 is an external perspective view of the projector, FIG. 14 is a connection diagram showing the connection between the copying machine main body and the projector, and FIG. 15 is the configuration of the electric circuit of the projector's operation panel. FIG. 2. Original table, 3. Original scanning section, 4. Image forming section, 1
DESCRIPTION OF SYMBOLS 1... Photoelectric converter (photoelectric conversion means), 24... Thermal head, 26... Ink ribbon (transfer rate), 50...
... fixed scale (positioning means), 100 ... projector (film projection device, 150 screen unit, 153 ... screen (display means), 157
...Adjustment mechanism (adjustment means), D...Document, P...
Paper.

Claims (1)

[Scope of Claims] In an image input device that inputs an image by optically scanning a document on a document table and guiding the document to a photoelectric conversion means by an optical system for photoelectric conversion, the position of the document placed on the document table is provided. an adjusting means for adjusting the position of the positioning means with respect to the optical system; a first reading means for reading the document aligned by the positioning means adjusted by the adjusting means; and a film. a film image projector for projecting an image of a document; a display means linked to the positioning means for projecting the image projected by the film image projector; and a display means for scanning the image on the display means to read the film image. An image input device comprising: 2 reading means.