JPS6376665A - Image processor - Google Patents

Abstract

PURPOSE:To freely vary a projection magnification without moving a projector by employing a zoom lens to a projection lens in a film projector. CONSTITUTION:The film projector 18 employs the zoom lens 21a, which can move in the direction of an optical axis. For example, when a film projecting image in size A5 on an original platen 2 is enlarged to size A4 from an image formed state the zoom lens 21a is close to a film F, and an inner lens is moved to shorten a focal distance. Hence the projection image is formed on a film in the size A4. In such a case, since the projection image P4 in protruded at four corners, compared with the projection image P5 in size A5, a read starting position of an image read unit 18 is shifted to a place corresponding to the left side P4a of the projection image P4 in size A4 on the left side rather than the reading position of the image in size A5. Then the image is read and scanned. Thus the image can be formed on the original platen 2 without shifting the position on the main body of the projector 18, and the projection magnification can be varied freely.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention [Field of Industrial Application] The present invention projects and forms a film image on a document table using a film projector, and reads, copies, etc. the projected image. Alternatively, the present invention relates to an image processing apparatus capable of selecting the projection image processing mode and the reflection original image processing mode.

[Conventional technology]

” The bipedal-like device itself is already known. An example is shown in FIG. The device of this example has two modes: a mode in which a normal sheet original, book original, etc. is placed on the document table and its image information is read, copied, etc., and a film projector projects and forms a film image on the document table. A mode for reading, copying, etc. the projected image can be selected. 3) shows the former reflection original image processing mode, and FIG. 3(b) shows the latter projection image processing mode.

In the figure, 1 is a main body of the apparatus, 2 is a transparent plate provided on the top surface of the main body 2 as a document table, and 3 is a movable image reading unit provided on the bottom side of the document table 2.

The image reading unit 3 consists of a solid-state imaging device array 4 (contact type line sensor) such as a CCD array, a short focus imaging device array 5 (product name: 5elfoc), an infrared cartridge filter 6, an illumination lamp 7, etc. A forward movement a along the lower surface of the document table 2 from the left side to the right side of the document table 2 at a predetermined speed V while being guided by the guide rail by the illustrated drive mechanism.
When it reaches a predetermined forward movement end point, it is returned to the home position and moved again.

The solid-state image sensor array 4 described in L is not only for reading black and white images, but also has three color resolution (red R, green G, blue B) and can read color or multicolor images. The color reading device can also be used for black and white image reading.

A. Reflection original image processing mode (Fig. 3 (a)) Original table 2
A document 0, such as a sheet document 0 document, is placed at a predetermined position on the upper surface with the image surface facing downward, and the document presser plate 8 is placed over it. Then, set the mode selection switch (not shown in the figure) to the corresponding mode, and press the process start button.

Then, the illumination lamp 7 of the image reading unit 3 is turned on, and the unit 3 moves forward (a).

As a result, the downward image surface of the set document O on the document table 2 is sequentially illuminated and read and scanned from the left side to the right side.
The solid-state image sensor array 4 outputs time-series photoelectric conversion pixel signals of read image information.

For example, in the digital color copying machine shown in FIG. 4, the output signal is processed by a laser driver (
(not shown) blinks the laser. The flashed laser beam is scanned by the rotating polygon mirror 9, and a latent image is formed on the photoreceptor drum 10 via the reflecting mirror 9a. The image is developed one color at a time by a rotary developing device 11, and sequentially transferred one color at a time onto a transfer paper 13 that has been wound around a transfer drum 12 in advance. Next, the transfer paper 13 is fixed by passing between a pair of fixing rollers 14, and is discharged outside the machine.

Furthermore, in the case of a facsimile device, the signal from the solid-state image sensor array 4 is transmitted to the receiving device side by wire or wirelessly,
In the case of an image reader, the above signal is stored in a storage section or reproduced and displayed on a display device such as a CRT.

B. Projection image processing mode (FIG. 3(b)) The Fresnel lens 15 or the diffuser plate 16 and the Fresnel lens 15 are placed on the document table 2, and the reflection mirror 17 is placed above it at an angle of approximately 45 degrees.
Support it stably in a downward facing position. Reference numeral 18 denotes a film projector detachably installed on the upper surface of the apparatus body 1 on the side of the reflecting mirror 17, and includes a light source lamp 19, a condenser lens 20, a projection lens 21, and the like. Reference numeral 22 denotes a film holder provided between the condenser lens 20 and the projection lens 21. A film F is set in the holder 22, and its projected image is formed on the document table 2 via the reflection mirror 17. The Fresnel lens 15 serves to convert the imaging light into a parallel light beam. Set the mode selection switch to the corresponding mode and press the process start button.

Then, the forward movement a of the image reading unit 3 is performed (in this case, the illumination lamp 7 is kept in the off state),
The film projection image on the document table is read and scanned sequentially from the left side to the right side, and time-series photoelectric conversion pixel signals of the read image information from the solid-state image sensor array 4 are output. The output signal is processed in the same manner as in the reflection original image processing mode described above.

[Problem that the invention seeks to solve]

However, since the projection lens 21 conventionally used in this type of film projector 18 is a short focal length lens with a fixed magnification, for example, if a film image is projected onto the document table 2 in an A5 size, However, if you try to output it in a larger size (for example, A4 or A3 size), the image data from the solid-state image sensor array 4 will have to be electrically interpolated, which will reduce the resolution of the image. There were drawbacks. In addition, when trying to change the projection magnification with the above-mentioned projection lens, it is necessary to change the positional relationship between the film surface and the projected film image, and there is a problem that the mounting position of the projector 18 with respect to the main body l of the apparatus must be changed. was there.

The present invention aims to solve the above problems.

Summary: Structure of the Invention [Means for Solving the Problems] The present invention provides a method for projecting and forming a film image on a document table using a film projector, reading and copying the projected image, or processing the projected image. An image processing apparatus capable of selecting a mode and an image processing mode of a reflective original is characterized in that a zoom lens is used as a projection lens of the film projector.

[For production]

By using a zoom lens as the projection lens of the film projector, it becomes possible to arbitrarily change the projection magnification without changing the installation position of the projector.

〔Example〕

FIG. 1 shows an embodiment of the present invention, and the same members as those in FIG.

The projection lens of the film projector 18 includes a zoom lens 21.
a is used and is movable in the optical axis direction.

The method of changing the projection magnification is as follows. For example, manuscript table 2J
: When enlarging the projected image from an A5 size film projection image to A4 size, use the method shown in Figure 1 (b).
), adjust the position of the zoom lens 21a to the film F.
By moving the internal lens of the zoom lens 21a to shorten the focal length, A
Four sizes of film projection images are formed. At this time, the projected image P4 formed on the document table 2 protrudes more than the A5 size projected image P5 on all four sides as shown in FIG. 1(C), so the reading start position of the image reading unit 18 is As shown in figure (d), the reading start position of A5 size (
position corresponding to the left side P5a of the A5 size projected image P5)
The reading scan is started at a position corresponding to the left side P4a of the A4 size projection image P4 on the left side.

In addition, by using the zoom lens 21a as the projection lens, as shown in FIG.
a)), 6 x 7 (cm) 74 lum F2 (same figure (
b)) Projection images P1 and F2 of films Fl and F2 of different sizes such as PL-P2 are projected onto the original without changing the distance between the images PL-P2 and the films F1-F2, that is, the position on the main body of the projector 18, etc. An image can be formed on the stand 2L. Moreover, by changing the position of the zoom lens 21a and its focal length in the same manner as in FIG. 1(b), the projection magnification of each film F1 and F2 can be changed arbitrarily.

Furthermore, by configuring the holder 22 for setting the film so that it can be moved vertically and horizontally, the zoom lens 21
It is also possible to arbitrarily crop the area, size, etc. that you want to photograph by working together with a.

C. Detailed Description of the Invention As described above, since the present invention uses a zoom lens as the projection lens of the film projector, the projection magnification can be changed arbitrarily without moving the projector as in the prior art. Furthermore, since the image is enlarged or reduced optically rather than electrically, there is an effect that the resolution does not deteriorate.

[Brief explanation of the drawing]

FIG. 1(a) is a schematic diagram of the image processing apparatus of the present invention, and FIG. 1(b)
) is an explanatory diagram showing the positional relationship between the film and the zoom lens when changing the projection magnification, (C) is an explanatory diagram of the three-person projection image, (d) is an explanatory diagram of the reading start position of the image reading unit, Figures 2 (a) and (b) are explanatory diagrams of examples using films of different sizes, Figure 3 (a) is a schematic diagram of the device state in L± reflection original image processing mode, and Figure 3 (b) 1 FIG. 4 is a schematic configuration explanatory diagram of the color copying machine in the projection image processing mode; FIG. 1 is the device main body, 2 is the document table, 3 is the image reading unit,
1B is a film projector, 19 is a light source lamp, 20 is a condenser lens, 21alf projection lens (zoom lens)
. Ward Castle 39O-

Claims (2)

[Claims] (1) An image processing device that projects and forms a film image on a document table surface using a film projector, and reads and copies the projected image, or that can select between the projection image processing mode and the reflection document image processing mode, An image processing device characterized in that a zoom lens is used as a projection lens of the film projector. (2) The image processing apparatus according to claim (1), wherein films of different sizes are loaded into the film projector.