JPH1013622A - Image input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To copy a satisfactory image without distortion by correcting distortion due to the distance of the image from a CCD camera through the use of a CCD camera as an image pickup means. SOLUTION: The CCD camera 4 as the image pickup means is fitted to the upper frame part 2 of a blackboard 1 by an attachment 3. A reference tape 5 being a size reference frame in which lateral lines of stripes at equal pitches are printed is adhered to the periphery of a board part being the part to be image-picked up in the blackboard 1 along the frame. The CCD camera 4 corrects the image of the part to be image-picked up in the size reference frame based on size information of the size reference frame which is image- picked up with the image of the part to be image-picked up. Thus, picture distortion is surely corrected, the satisfactory image is printed by a printer and a digital copying machine and it is inputted to a personal computer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an object to be imaged, for example, a character written on a blackboard or a whiteboard, or an image projected by an image projecting means, for example, an OHP. The present invention relates to an image input device for inputting image information to a printer, a digital copying machine, or a personal computer.

[0002]

2. Description of the Related Art Conventionally, there is a copy blackboard as shown in FIG. 19 as an image input device for copying an image written by hand.

This copy blackboard has a blackboard frame 41 and a white sheet 42 of a length having a plurality of hand-writable surfaces.
An operation panel unit 43 provided on the blackboard frame 41; a line sensor (not shown) serving as a reading unit for reading an image written on a white sheet 42 provided on one end of the blackboard frame 41; It comprises a printer 44 for copying an image read by the unit, and a power cord 45.

[0004] The white sheet 42 is attached to the blackboard frame 41.
When the user operates the copy button of the operation panel unit 43 when copying a character or the like written on the white sheet 42, the blackboard frame is wrapped around the supply unit at the other end opposite to the line sensor. An image (characters, pictures, figures, etc.) written on the white sheet 42 on which the white sheet 42 on which the characters and the like are written by rotating a winding unit provided at one end of the white sheet 42 is wound. Is read by a line sensor, and the read image is
4. Copy to thermal paper and print out.

[0005]

The above-described printer for a copy blackboard generally uses thermal paper, the printing speed is slow, and it is necessary to copy the required number of copies again by a copying machine. Also, when using the copy blackboard at a meeting or the like, a material prepared in advance to promptly proceed with the meeting or the like is projected on the copy blackboard using a projection device such as an OHP, and is additionally written on the projection image. In this case, the composite image cannot be copied using a conventional copy blackboard.

On the other hand, by using a CCD camera as an imaging means, an image written on a blackboard is taken (read), digital image information of the taken image is recorded on a mini disk, and the digital image information is recorded on the mini disk. The above problem can be solved by printing out the digital image information by a printer, but the copy blackboard is a method of directly reading a plane, whereas the CCD camera is originally a three-dimensional object, so the blackboard If you do not install the CCD camera at an equal distance to each corner of the plane,
There has been a problem that the image is distorted depending on the distance of the image to the CCD camera.

According to the present invention, based on dimensional information of a dimensional reference frame taken together with an image of a part to be imaged by an imaging means,
An object of the present invention is to copy a good image without distortion by correcting an image of an image-capturing portion within the dimension reference frame.

[0008]

According to a first aspect of the present invention, there is provided an image input apparatus, comprising: an image pickup means for picking up an image of an object to be imaged; and a reference dimension around the object to be imaged. Image correction for correcting an image of an image-capturing part in the dimension reference frame based on the dimension reference frame having information and the dimension information of the dimension reference frame imaged together with the image of the image-capturing part by the imaging means. Means.

According to a second aspect of the present invention, there is provided an image input device including a notifying means for notifying that the entire size reference frame is not imaged in the image picked up by the image pickup means.

According to a third aspect of the present invention, there is provided the image input apparatus, further comprising: an image pickup control means for enlarging a frame image of a longest portion of the dimension reference frame picked up by the image pickup means to a maximum width of a pickable range.

According to a fourth aspect of the present invention, there is provided an image input apparatus, comprising: a deflecting filter that cuts off reflected light reflected by the imaging section; and a filter driving unit that changes a direction of the deflecting filter based on the reflected light. I have.

According to a fifth aspect of the present invention, there is provided an image input device, comprising: an image projecting means for projecting an image on the image pickup portion; and a light / dark detection for detecting light / dark of the image pickup portion based on image information picked up by the image pickup means. Means, when the image projected by the image projecting means onto the image-captured part and the image directly written on the image-captured part are imaged by the image-capturing means, the image is taken based on the detection result of the light-dark detection means. Density correcting means for correcting the density of the image obtained.

According to a sixth aspect of the present invention, there is provided an image input device, comprising: an image inverting means for detecting whether or not the reference color of the object to be imaged is white and inverting an image taken by the image taking means when the reference color is not white. ing.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of an image input device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a use state using the image input apparatus of the first embodiment. A CCD camera 4 as an image pickup means is attached to an upper frame 2 of a blackboard 1 by an attachment 3. In the frame portion of the blackboard 1, a reference tape 5, which is a reference size frame on which horizontal lines of equal-pitch stripes (1 inch intervals) are printed, is arranged along the frame, that is, around the board portion 1 a, which is the imaging portion of the blackboard 1. It is stuck on. FIG. 2 is an enlarged view showing the reference tape 5 of FIG.

FIG. 3 shows an embodiment in use of the present invention in the same manner as described above. The CCD camera 4 is connected to a back connector of a notebook computer 7 via a controller 6.
A reference tape 5 is stuck on the frame of the blackboard 1 along the frame as in FIG.

An image (ABC in the case of FIG. 1) written on the blackboard 1 in FIG. 1 is picked up (read) by the CCD camera 4, and the effective image pick-up area 4a of the CCD camera 4 is usually left as shown in FIG. Read status and CC
The image is read with the D camera 4 attached. In the case of FIG. 4, the frame of the blackboard 1 is located at the center of the effective image capturing range 4a.
The image of the lower frame portion is smaller than the upper frame portion shifted to the left.

According to the present invention, the frame image of the reference tape 5 read as the frame information of the blackboard 1 in the effective image pickup range 4a is compared with the equal pitch stripes of the reference data already incorporated in the software CPU. By using the frame image of the reference tape 5 as a reference and performing image processing by the CPU of the controller 6 shown in FIG. 5, the long frame image X1 of the image shown in FIG. Perform image processing for enlargement and alignment, and use the other X2
Is similarly expanded to the horizontal range L of the effective image capturing range 4a,
The position of the image is adjusted to the left of the vertical range M of the effective image capturing range 4a.

The enlargement ratio difference L ÷ X1−L ÷ X2 at this time is used as upper and lower correction numerical values, and used as upper and lower image correction of Y1 and Y2 in FIG.

That is, the upper part of Y1 and Y2 and the portion in contact with X1 have an enlargement ratio of L ÷ X1, and the lower part of Y1 and Y2,
The portion in contact with X2 is the enlargement ratio of L２X2, and changes from (L ÷ X1) to (L ÷ X2) during each interval.

The equal pitch of 1 inch of the reference tape 5 is not uniform because the pitch of each line of the pitch input as the frame information of the blackboard 1 in the effective image pickup area 4a is skewed by the image. By correcting the unequal frame information so as to be equal on the basis of the upper left, it is possible to correct the distortion of the entire image, and the image (FIG. 7) after performing this correction is output to a printer or a digital copier. And print it out.

The controller 6 includes a CCD camera 4
, Power switch 9, number setting switch 10, print switch 1 for receiving image data transmitted from
1, an LED display section 12, a digital telephone connection terminal 13, a personal computer connection terminal 14, and a camera mounting screw hole 15 for mounting the CCD camera 4.

The LED display section 12 includes a CCD camera 4
The image of the blackboard 1 read by the CPU is the effective image capturing range 4
As shown in FIG. 6 (a), first, "L" is displayed when it protrudes from "a", and then it is determined whether it protrudes upward, downward, left or right as shown in FIG. 6 (b). It is indicated by the blinking position of "-". FIG. 6B shows that it protrudes to the right.

Then, the position of the CCD camera 4 is adjusted in view of this display so that the image on the blackboard 1 is entirely within the effective image pickup range 4a. When the lens 16 of the CCD camera 4 described later is constituted by a zoom lens, the zoom lens is controlled so that an image to be read is automatically included in the effective image capturing range 4a, and the LED display is performed. “0” is blinked in the unit 12 so that the image is in the effective image capturing range 4a.
Display that it is included.

In the block diagram of FIG.
The structure of the lens 16 will be described.
It comprises an amplifier 18, a synchronization signal generator 19, a synchronization processor 20, and an output circuit 21.

In the block diagram of FIG.
To describe the structure, the circuit comprises a receiving circuit 22, an amplifier 23, a frame detector 24, a frame memory 25, a black and white determination unit 26, an image correction unit 27, an image memory 28, and an output circuit 29.

The CCD camera 4 includes a zoom lens 16
An image is formed on the CCD image receiving unit 17 via the CCD, an weak signal from the CCD image receiving unit 17 is amplified by the amplifier 18, and horizontal and vertical synchronizing signals necessary for assembling the image from the synchronizing signal generating unit 19 are formed. The image data from the amplifier 18 is processed by the synchronization processing unit 20 based on this, and the processed image data is transmitted from the output circuit 21.

The receiving circuit 2 of the controller 6
2 receives the image data transmitted from the CCD camera 4 and amplifies the image data with an amplifier 23;
To check whether or not the frame surrounded by the stripe line is within the effective image capturing range 4a in the frame memory 25. First, "L" is displayed as shown in a), and then
Figure 6 shows which side is up, down, left or right
As shown in (b), it is indicated by the blinking position of "-". FIG. 6B shows that it protrudes to the right.

Then, the position of the CCD camera 4 is adjusted so that the image of the blackboard 1 is entirely within the effective image pickup range 4a. When the lens 16 of the CCD camera 4 described later is constituted by a zoom lens, the zoom lens is controlled so that an image to be read is automatically included in the effective image capturing range 4a, and the LED display is performed. The unit 11 blinks “0” so that the image is in the effective image capturing range 4a.
Display that it is included.

In this case, on the basis of the longest X1 of the stripe line shown in FIG. 4, if it is smaller than the effective image pickup range 4a, it is enlarged by the zoom lens 16 and the left or right end of the stripe line X1 is obtained. The portion is enlarged until it reaches one of the vertical lines at both ends of the effective image capturing range 4a.

The CCD image receiving section 17 has a vertical image range M of 540 dots and a horizontal image range L of 7
It becomes 60 dots. Characters are represented by 16 × 16 dots from the character structure of word processors and so on.
33.75, generally about 34 lines of characters are written on blackboard 1,
In the case of the blackboard 1 shown in FIG. 10, the effective range is 880 mm in length, 1240 mm in width, and 25 to 26 mm (about 1
(Inches) Four or more square characters are 16 dots by 16 dots of one character, and have a size that can be easily identified. In contrast,
Since image processing of a printer or a digital copying machine is generally performed at 400 dots / inch or more, the size of the blackboard 8
80mm × 1240mm is A4 size, 210m
Even if it is reduced to mx 297mm and printed out, about 1
On the other hand, the image area is 540 dots vertically input image from the CCD camera 4, and the printout is 21
0 mm / 25.4 mm × 400 = 3.300 dots. Since the input of the CCD camera 4 can be printed out at about six times the density of the image, the image taken by the CCD camera 4 within the range of this difference is the same pitch as the frame line in FIG. Even if the inside of the line is enlarged and corrected, the image correction can be performed without noticeability.

This means that, when it is desired to print out the image of the blackboard 1 at the same size as it is, the size of the image input by the CCD camera 4 can be known from the fact that the line interval between the stripes of equal pitch is 1 inch. In the case of performing the same size printout on A4 paper as shown in FIG.
From 80 × 1240 mm, it becomes possible with 16 to 25 divided copies.

Next, a description will be given of an image input apparatus according to a second embodiment of the present invention, by referring to FIGS. 12 to 17. A deflecting filter for cutting the light reflected by the blackboard 1 in front of the zoom lens 16 of the CCD camera 4. A rotation control pulse motor 32 for rotating the deflection filter 31 is provided.

The image input device having the above-described configuration is similar to the blackboard 1 shown in FIG.
(In the case of the figure, ABC) is imaged (read) by the CCD camera 4, and the effective image imaging range 4a of the CCD camera 4 is normally read as shown in FIG. 4 is read in the attached state. In the case of FIG. 4, the frame of the blackboard 1 is shifted to the left from the center of the effective image capturing range 4a, and the image of the lower frame portion is smaller than the upper frame portion.

According to the present invention, the frame image of the reference tape 5 read as the frame information of the blackboard 1 in the effective image pickup area 4a is compared with the equal pitch stripes of the reference data already incorporated in the software CPU. By using the frame image of the reference tape 5 as a reference and performing image processing by the CPU of the controller 6 shown in FIG. 5, the long frame image X1 of the image shown in FIG. Perform image processing for enlargement and alignment, and use the other X2
Is similarly expanded to the horizontal range L of the effective image capturing range 4a,
The position of the image is adjusted to the left of the vertical range M of the effective image capturing range 4a.

The enlargement ratio difference L ÷ X1−L ÷ X2 at this time is used as upper and lower correction numerical values, and used as upper and lower image correction of Y1 and Y2 in FIG.

That is, the upper portion of Y1 and Y2 and the portion in contact with X1 have an enlargement ratio of L ÷ X1, and the lower portion of Y1 and Y2,
The portion in contact with X2 is the enlargement ratio of L２X2, and changes from (L ÷ X1) to (L ÷ X2) during each interval.

FIG. 15 showing the image thus corrected.
Is an image blurred by the light W from the window shown in FIG. Black and white ratio of blackboard 1 and letters A, B, C is CC
This is because when received by the D camera 4, the black-and-white ratio is reduced by the light W from the window, and the lines of the characters A, B, and C are difficult to recognize. Here, the deflection filter 31 attached to the front of the zoom lens 16 of the CCD camera 4 is rotated once by the rotation control pulse motor 32, and the position of the lowest brightness received by the CCD camera 4 is determined. The deflection filter 31 is stopped (the characteristic diagram of FIG. 16). Thus, the image captured by the CCD camera 4 can cut off the reflected light of the blackboard 1 by cutting off the light amount.

Further, with the spread of personal computers, there are cases where data and graphs on the personal computer screen are irradiated on the blackboard 1 by the projector 33 as shown in FIG. In this case, for the illuminated image,
When characters are written on the blackboard 1, they are superposed. When this is captured as an image by the CCD camera 4, the image illuminated by the projector 33 has a black-and-white ratio, whereas the portion where characters are written on the blackboard 1 has a low black-and-white ratio in the dark portion of the image. A bright portion has a high black-to-white ratio and is likely to have a character missing state as an image. That is, when irradiating with the projector 33, it is customary to make the illumination of the room of the conference room as dark as possible to make it easy to see the image,
Characters written on the blackboard 1 have to rely on the brightness of the projector 33.

In order to cope with this, the deflection filter 31 is rotated once by the rotation control pulse motor 32 and the CCD camera 4 is rotated.
Then, the brightest position of the received light is determined, and the deflection filter 31 is stopped at the appropriate position. As a result, the image captured by the CCD camera can make full use of the overall brightness of the room, and the black / white ratio of the characters written on the blackboard 1 is improved.

In addition, characters written on the blackboard 1 are often not only thinned by the light W from the above-mentioned window but also thinned by the writer. It becomes thin. For this reason, characters may be blurred when actually printed out. CC
The D image receiving unit 17 has a vertical image range M of 410,000 pixels.
Is 540 dots and the horizontal L is about 760 dots. Since characters are represented by 16 × 16 dots in height from the character configuration of a word processor or the like, 540 縦 16 = 33.75 (approximately 3
4) Generally, the characters written on the blackboard 1 are about 34 lines,
In the case of the blackboard 1 shown in FIG.
The size of the blackboard 1 is 40 mm, and characters of 25 to 26 mm (about 1 inch) square or more on the blackboard 1 have a size of 16 dots by 16 dots of one character, and the size of the blackboard 1 is easily recognized. Among them, as a line, 25 ÷ 16 = 1.5625 (about 1.5
mm) or more is a thickness that is easily recognized (the above is related to recognition of the CCD camera 4).

On the other hand, since the image processing of a printer or a digital copying machine generally uses 400 dots / ink or more, the size of the blackboard 1 is 8800 mm × 240 mm.
Is reduced to, for example, A4 size, 210 mm × 297 mm, and the printout is about ４. On the other hand, the image range is 540 dots vertically input image from the CCD camera 4, and the printout is 210 mm ÷ 25. 4mm ×
It can be done with 3,300 dots. That is, printing can be performed at a density about six times as high. Therefore, image processing on software is C
The CD input line is increased by a factor of six and can be corrected in detail. For example, the line thickness at the time of printout is set to 0.5
If it is determined to be 1.5 mm or more, when a 1.5 mm line on the blackboard 1 is printed out, the 1.5 mm line on the blackboard 1 usually becomes 1.5 mm.
mm ÷ 4 = 0.375mm is printed out,
It can be unified to 0.5 mm.

As described above, the recognition on the blackboard 1 is as follows.
The thickness of a line of 1.5 mm or more is easy to identify, but it is possible to identify it with a slight difference in density and a black-and-white ratio by using a software that expands the black-and-white ratio on software or recognizes a line as a line.
÷ 2 = 0.75 mm can be identified.

In some schools, the base color of the blackboard 1 is still dark green with chalk. Here, when an image is input by the CCD camera 4, only characters and pictures written in chalk as an image become white, and are in a black-and-white inverted state as compared with a whiteboard.

In order to automatically invert the chalk character and base at the time of printout to make the character and picture white,
In the image read by the CCD camera 4 in FIG. 4, the overall brightness between the effective image capturing range 4 a and the image of the blackboard 1 surrounded by the stripe lines is higher than the overall brightness in the blackboard 1. If the image is bright, the image is automatically inverted on software.

This operation is performed when the print switch 11 of the controller 6 is pressed. However, under the conditions for setting the blackboard 1, even if the blackboard 1 is dark, the surrounding area may be a black wall.
The controller 6 may be provided with a changeover switch (not shown).

On the blackboard 1, especially a whiteboard, etc., the squares are often thinly printed to make it easier to write characters. Originally, the lines are printed with light lines that cannot be read on a copy blackboard.However, in the image illuminated with a projector or the like described above, since the amount of light is originally small, it is possible to read the squares that are slight lines. possible. Also,
Depending on the blackboard, the density of the line may be different and may be recognized. For this reason, software for recognizing uniform squares is installed in the software controller 6 in advance, and automatically deleted when read as an image.

In FIG. 14, the CCD camera 4 forms an image on the CCD image receiving unit 17 via the zoom lens 16, amplifies a weak signal from the CCD image receiving unit 17 by the amplifier 18, and outputs the horizontal and horizontal signals necessary for assembling the image. Image data from the amplifier 18 based on the vertical synchronization signal;
0, and the processed image data is transmitted from the output circuit 21.

The receiving circuit 2 of the controller 6
2 receives the image data transmitted from the CCD camera 4 and amplifies the image data with an amplifier 23;
The zoom lens 16 automatically recognizes the stripes of the same pitch in the effective image pickup range 4a (the zoom lens motor of the zoom lens 17 is not shown). By the above-described image correction, the image is temporarily stored in the memory in the state shown in FIG. The output to the printer and the input to the personal computer are output in this order, and the printout has a function of sequentially laying pages in the lower row.

[0050]

According to the first aspect of the present invention, there is provided an image input device, comprising: an image pickup means for picking up an image of a part to be imaged; a dimension reference frame having reference dimension information around the part to be imaged; And image correction means for correcting the image of the image-capturing portion in the dimension reference frame based on the dimensional information of the dimension reference frame captured together with the image of the image-capturing portion. This makes it possible to print out a good image to a printer or a digital copying machine, or to input the image to a personal computer.

According to a second aspect of the present invention, the image input device includes a notifying means for notifying that the entire size reference frame is not imaged in the image picked up by the image pickup means. When the mounting position of the means, that is, the position with respect to the imaged portion is extremely deviated, the fact can be known by the notification of the notification means, and the image of the imaged portion can be reliably captured.

According to a third aspect of the present invention, there is provided the image input apparatus, wherein the image input device includes image pickup control means for enlarging the frame image of the longest portion of the dimension reference frame picked up by the image pickup means to the maximum width of the image pickupable range. In addition, it is not necessary to adjust the distance of the imaging unit to the imaging target each time, and by enlarging it to the maximum width of the imaging range, the captured image can be reliably recognized and printed out by a printer or the like. In this case, a good image can be obtained.

According to a fourth aspect of the present invention, there is provided an image input apparatus, comprising: a deflecting filter that cuts off reflected light reflected by the imaging target; and a filter driving unit that changes a direction of the deflecting filter based on the reflected light. Therefore, it is possible to reliably prevent an image reading defect due to external light and to read an image with an appropriate contrast.

According to a fifth aspect of the present invention, there is provided an image input device, comprising: an image projecting means for projecting an image on the object to be imaged; and a light / dark detecting means for detecting the brightness of the object to be imaged based on image information taken by the image taking means. Means, when the image projected by the image projecting means onto the image-captured part and the image directly written on the image-captured part are imaged by the image-capturing means, the image is taken based on the detection result of the light-dark detection means. Since the image processing apparatus is provided with the density correction unit that corrects the density of the obtained image, the image projected by the image projection unit onto the imaging target can be reliably read.

An image input device according to a sixth aspect of the present invention includes image inverting means for detecting whether or not the reference color of the portion to be imaged is white and inverting the image picked up by the image pickup means when the reference color is not white. Therefore, even when characters or the like are written on a portion to be imaged other than white, that is, a chalk on a dark green blackboard, characters can be printed out in black at the time of output, for example, when printed out by a printer. Printout can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment 1 of an image input device of the present invention.

FIG. 2 is an enlarged view showing the reference tape of FIG. 1;

FIG. 3 is a perspective view showing another example of the image input device according to the first embodiment of the present invention;

FIG. 4 is an explanatory diagram showing an image of a range captured by the CCD camera of FIG. 1;

FIG. 5 is a plan view showing a controller of the image input device of the present invention.

6A is an enlarged view of the display unit of FIG. 5 showing a state in which an image extends outside the effective image capturing range, and FIG. 6B is a view of the display unit of FIG. It is an enlarged view.

FIG. 7 is an explanatory diagram showing an image after correction by the image input device of the present invention.

FIG. 8 is a CCD according to the first embodiment of the image input apparatus of the present invention.
It is a control block diagram of a camera.

FIG. 9 is a control block diagram of a controller according to the first embodiment of the image input apparatus of the present invention.

FIG. 10 is an explanatory diagram of the size of characters written on the blackboard 1 in the image input device of the present invention.

FIG. 11 is a perspective view showing a state in which an image captured by the image input device of the present invention is copied at the same magnification by a copying machine.

FIG. 12 is a perspective view illustrating an image input device according to a second embodiment of the present invention.

FIG. 13 is an enlarged perspective view of a main part of FIG.

FIG. 14 is a diagram illustrating a CC according to the second embodiment of the image input apparatus of the present invention;
It is a control block diagram of D camera.

FIG. 15 is an explanatory diagram showing an image captured by the CCD camera in FIG. 12;

FIG. 16 is an explanatory diagram showing characteristics of the amount of light received when the deflection filter of FIG. 13 is rotated once.

FIG. 17 is a perspective view showing a state in which an image is projected by a projector on a blackboard which is an imaging target.

FIG. 18 is a perspective view showing a state in which an image captured by the image input device of the present invention is copied onto one sheet of paper by a copying machine.

FIG. 19 is a perspective view showing a copy blackboard as a conventional image input device.

[Explanation of symbols]

 Reference Signs List 1 blackboard 4 CCD camera 5 reference tape 6 controller 16 zoom lens 17 CCD image receiving unit 18 amplifier 19 synchronization signal generation unit 20 synchronization processing unit 21 output circuit 22 reception circuit 23 amplifier 24 frame detector 25 frame memory 26 black / white determination unit 27 image correction Part 28 image memory 29 output circuit

Claims (6)

[Claims] 1. An image input apparatus having an image pickup means for picking up an image of an object to be imaged, comprising: a dimension reference frame having dimension information serving as a reference around the object to be imaged; An image input device, comprising: an image correcting unit that corrects an image of a portion to be imaged in the dimension reference frame based on the dimension information of the dimension reference frame captured together with the image of the section. 2. An image pickup device according to claim 1, further comprising: a notifying unit for notifying that the entire size reference frame is not imaged in the image picked up by the image pickup unit.
The image input device according to the above. 3. An image pickup control means for enlarging a frame image of a longest portion of the dimension reference frame picked up by the image pickup means to a maximum width of an imageable range. Image input device. 4. The apparatus according to claim 1, further comprising: a deflecting filter that cuts off reflected light reflected by the imaging section; and a filter driving unit that changes a direction of the deflecting filter based on the reflected light. The image input device according to the above. 5. An image projecting means for projecting an image on the object to be imaged, a light / dark detecting means for detecting the brightness of the object to be imaged based on image information taken by the image taking means, When an image projected on the imaged portion and an image written directly on the imaged portion are captured by the imager, the density of the imaged image is corrected based on the detection result of the light / dark detector. 2. The image input device according to claim 1, further comprising a density correction unit. 6. An image inverting means for detecting whether or not a reference color of an object to be imaged is white and inverting an image picked up by the image pickup means when the image is not white. 2. The image input device according to 1.