JPH09106009A - Microfilm projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a microfilm projector, by which the optimum rectification can be made for adjacent frames even in the case of automatically retrieving a roll film or the like to obtain a print image. SOLUTION: A main body operating part is provided with an image gradient correction select button 32, whereby it is possible to select whether the position of a prism for correction the gradient of an image is returned to the position before correction or held in the corrected position after gradient correction. Further, the projector is provided with a screen image gradient correcting switch 33 which is pressed in the case of making a gradlent correction only for the screen image. Further there is provided with an image gradient correction stop deciding button 34 to set the count for stopping the gradient correcting function together with a count setting button 25 when images which do not require gradient correction are continous more than the preset count, and the image gradient correction select button 32 and a count setting button 25 can set the count for automatically switching the position of a prism to a rear position when images which require gradient correction are continuous more than a preset count even if the position of the prism is the front position after gradient correction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microfilm projection device such as a microreader, a microreader printer, a microscanner or the like, which obtains image data by projecting a micro film onto a screen or a photoconductor, an image sensor, etc. The present invention relates to the improvement of the inclination correction.

[0002]

2. Description of the Related Art In a microreader or a microreader printer, when an image is projected on a screen surface, a photoconductor surface, or an image sensor, a document is photographed while being tilted, a roll film carrier, etc. The film may be tilted due to the transport of the film by the carrier, and the image may be tilted on the projection surface.

As a method for correcting such an image inclination, for example, a micro reader printer has recently been proposed which automatically corrects the image inclination by rotating a prism disposed in the optical path. ing. When the correction is performed in this micro reader printer, the image projected on the screen is read by an image sensor or the like, the inclination of the image is calculated based on the image information, and the prism is driven to rotate. Then, after the inclination correction of the image is performed, the prism is held at the position after the correction, and the inclination correction for the next image is performed from the position.

[0004]

However, in the image inclination correction of the conventional micro-reader printer described above, in the case where a roll film or the like is automatically searched by the controller to obtain a print image, the following problem occurs. There was a problem.

That is, after correcting the inclination of a searched piece, if the next piece is tilted on the opposite side to the previous piece,
Since the prism remains as it was after the tilt correction of the previous frame, the next frame will be further tilted when projected on the screen, and the larger the tilt amount, the closer the screen image will become to the horizontal image from the initial vertical image. However, there is a problem that not only the tilt correction calculation becomes difficult but also it becomes difficult to see on the screen.

On the contrary, in the case of automatically retrieving an image having the same inclination, if the prism returns to the position before the correction after the inclination correction, the same inclination correction operation is performed many times. This will take time and reduce work efficiency.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to adjoin even when a roll film or the like is automatically searched to obtain a print image. It is an object of the present invention to provide a microfilm projection device capable of optimal tilt correction for an image of a frame.

[0008]

The present invention for achieving the above object is specified as follows for each claim. According to a first aspect of the present invention, in a microfilm projection device, a projection unit that magnifies and projects a predetermined image in a microfilm for performing an arbitrary process, a tilt notification unit that notifies a tilt of the predetermined image, and the predetermined unit. A tilt correcting unit that corrects the tilt of the image, and returns the tilt correcting unit to the state before the correction after the processing for the predetermined image is completed.
In the microfilm projector, one of a mode and a second mode in which the tilt correcting means is held in a state after tilt correction is selectable.
In the invention thus specified, when the print image is obtained and the inclination of the image in the film is irregular, the inclination correcting means is set to the first mode for returning to the state before the correction. In other words, the tilt correction performed on the previous image does not affect the next image. On the contrary, if the tilts of the images in the film are the same, if the tilt correction means is set to the second mode in which the tilt-corrected state is maintained, the tilt of the next image is corrected. Therefore, there is no need to perform tilt correction. In this way, it becomes possible to efficiently perform the inclination correction of the image, and the working time can be shortened.

According to a second aspect of the present invention, in addition to the microfilm projection apparatus according to the first aspect, there is further provided means for determining whether or not tilt correction for a predetermined image is necessary, and a predetermined number of times is continuously set, When an image that does not require tilt correction is processed, tilt correction is not performed on an image that is subsequently processed.

According to a third aspect of the present invention, in the microfilm projector according to the first aspect, when the first mode is selected, inclination correction of the same angle is continuously performed a predetermined number of times. When the performed image is processed, the mode is switched to the second mode.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a schematic configuration diagram of a micro-reader printer according to an embodiment of the present invention, FIG. 2 is a diagram for explaining a driving mechanism of a prism shown in FIG. 1, and FIG. 3 is shown in FIG. It is a front view of the main body operation unit of the micro reader printer. As shown in FIG. 1, the microreader printer of the present embodiment, which forms an image of the transmitted light of the microfilm on the screen surface or the photoconductor surface, is provided with an image inclination correcting means.

Reference numeral 1 is a fish carrier to which a microfilm 2 is attached. The light of the projection lamp 3 is guided to the lower surface of the microfilm 2 via the condenser lens 4, the condenser mirror 5, and the Fresnel lens 6. In the reader mode, the image on the microfilm 2 is guided by the projection lens 7, the reader system first mirror 8 and the reader system second mirror 9 onto the surface of the screen 10 to form an enlarged projection image. At this time, the scan mirror 11 is retracted to the dotted line position β in the figure. Further, in the print mode, the scan mirror 11 moves from the dotted line position β in the figure to the solid line position α to direct the light to the second printing system mirror 1.
The optical path is changed to 2, and the enlarged projection image is slit-exposed on the photoconductor 14 to form a latent image. At this time, the sensor system mirror 13 is retracted to the dotted line position γ in the figure. This latent image is visualized by the toner charged to a predetermined polarity and transferred onto the transfer paper 18. Each member for forming an enlarged projection image on the screen 10 surface or the photoconductor 14 constitutes a projection means.

In such a micro reader printer, the prism 16 is a prism drive motor 17 using a pulse motor, for example (hereinafter also referred to as motor 17).
It is possible to rotate electrically. That is, FIG.
As shown in, the timing pulley 19 press-fitted into the main shaft of the motor 17 and the timing pulley 21 press-fitted into the shaft 23 are connected by the timing belt 20 so that the rotational power of the motor 17 can be transmitted, and the timing pulley 19 is connected to the shaft 23. Similarly to 21, the spur gear 22 press-fitted and the gear portion of the prism 16 mesh with each other, and the rotational power is transmitted from the motor 17 to the prism 16, so that the prism 16 as the inclination correcting means is rotationally driven. ing. Further, in the case of correcting the inclination of the image, the scan mirror 11 is moved from the above-mentioned dotted line position β to the solid line position α, and the sensor system mirror 13 provided in the middle of its optical path is switched from the dotted line position γ to the solid line position δ. Light enters the image sensor 15. The image sensor 15 senses the enlarged projection image by rotating the scan mirror 11.

As shown in FIG. 3, an image tilt correction selection button 32 and a screen image tilt correction switch 33 are provided on the main body operation section provided on the screen frame. The image tilt correction selection button 32 returns the position of the prism 16 after tilt correction to the position before correction (front position) (corresponding to the first mode) or holds it at the position after correction (rear position) (first position). The LED at the selected position is turned on by a button for selecting whether the mode is equivalent to 2 modes. When neither is selected, the image tilt correction is not performed, and neither LED is turned on.
The screen image inclination correction switch 33 is pressed only when it is desired to perform image inclination correction on the screen image. Therefore, normally, if the image tilt correction selection button 32 is selected to perform the tilt correction, the image tilt correction is performed only on the print image, and when the tilt correction of the screen image is desired, the screen tilt correction is performed. The image tilt correction operation is performed by pressing the image tilt correction switch 33 once. In addition, reference numeral 2 in FIG.
Reference numerals 6 to 31 denote an automatic exposure (AE) selection button, a negative / positive selection button, a screen illuminance switching button, an image selection button, a masking selection button, and a centering selection button, respectively.

Next, the image tilt correction operation of the microreader printer according to this embodiment will be described. FIG.
(1) is a diagram showing a screen image before tilt correction, FIG.
FIG. 5B is a diagram showing a screen image after tilt correction, FIG.
FIG. 5A is a diagram showing a print image whose inclination has been corrected.
(2) is a diagram showing a print image that has not been tilt-corrected, FIG. 6 is a flowchart of a print-image tilt correction operation, and FIG.
8 is a flowchart of the screen image tilt correction operation, FIG.
FIG. 3 is a block diagram showing a data processing circuit.

As shown in FIG. 4 (1), it is assumed that a film is mounted on the fish carrier 1 and the image enlarged and projected on the screen 10 has an inclination. Normally, if a printout is performed without performing the tilt correction as it is, as shown in FIG.
The image as shown in (2) is output. Therefore, the following operation is performed in order to obtain a tilt-corrected image. FIG.
The image tilt correction selection button 32 of the main body operation unit shown in is set to hold the prism 16 at the rear position, that is, the position after tilt correction, and the tilt correction is performed on the print image.

When the print button 24 is pressed, the screen shown in FIG.
The image tilt correction operation is performed in the procedure as shown in FIG. When the print button 24 is pressed (step S101), the scan mirror 11 first moves to the screen side (β → α) and the optical path is switched to the print mode (step S101).
102). At the same time as this movement, the sensor system mirror l3
Rotates (γ → δ) to switch the optical path to the image sensor 15 side (step S103). Then, the image sensor 1 is rotated by scanning the scan mirror 11.
5 senses the enlarged projection image (step S10)
4).

The image information of the enlarged projection image obtained by the image sensor 15 is processed by the data processing circuit shown in FIG. The analog image information obtained by the image sensor 15 is first amplified by AMP (amplifying circuit), and then A
The analog image information is converted into digital image information by the / D converter. Then, the image tilt amount is calculated in the CPU,
The tilt correction amount, that is, the rotation angle of the prism 16 is obtained (step S105).

Here, the above steps S104 and S1.
The calculation of the image tilt amount and the prism tilt correction amount performed in 05 will be described in detail. FIG. 9 is a diagram showing a state in which the edge portion of the image is projected on the image sensor 15, and FIG. 10 is a histogram created to obtain the image tilt amount based on the output value of the image sensor 15.

As shown in FIG. 9, the image sensor 15
For example, a 7 × 2 (mm) rectangular sensor arranged and fixed in a plurality of lines in the main scanning direction (x direction) is used. When the scan mirror 11 is rotationally scanned, the image edge portion moves in the sub-scanning direction (y direction) and is projected on the surface of the image sensor 15 as illustrated. At this time, the output value of the image sensor 15 changes as the scan mirror 11 rotates. Predetermined positions (a′-) between the respective sensors arranged in the main scanning direction
g ′) at each point (a to d, e ₁ , e ₂ , f of the image edge part
₁ , f ₂ , g) is projected and the time difference when the sensor output value reaches a predetermined value, or the scan mirror 1
The difference in the amount of movement of the image due to the rotation of 1 corresponds to the distance (Ly) in the y direction between the points of the image edge portion. on the other hand,
The distance between the points in the x direction (Lx) is obtained from the pitch in the main scanning direction between the plurality of arranged sensors, so the image tilt amount is tan ^-1 (LX / Ly) or ta.
It can be obtained by calculating n ^-1 (Ly / LX).

Specifically, the ratios of LX and Ly in all combinations between the points are obtained, and tan ⁻¹ (Ly / LX) when Ly <LX, and tan ⁻ when Ly> LX. ^The angle is converted with ¹ (LX / Ly). When angle conversion is performed for all the points between the points, various angle data can be obtained as shown in the histogram of FIG. 10. The angle having the highest frequency is used as the image inclination amount. In this way, the histogram is created and the image tilt amount is obtained because the point (eg, e ₁ ) at the edge portion of the document mark (so-called blip mark) MK used in the image retrieval system when the roll film is used is used. The inclination obtained from the point of the image edge portion (for example, d), the inclination obtained from the point of the horizontal edge portion of the image (for example, a) and the point of the vertical edge portion of the image (for example, g), or error noise This is because it needs to be removed. Instead of rotating the scan mirror 11 as described above, it is also possible to move the film in the sub-scanning direction and project the image edge portion onto the surface of the image sensor 15. The symbol P in FIG. 9 indicates an image frame.

In this way, the image tilt amount is obtained, and if the image is rotated by that amount, the tilt is corrected, but when the prism 16 is rotated and corrected, the prism 16 is rotated by half the angle. do it. For example, when the image tilt amount is calculated to be 45 °, the prism 16 is set to 22.
It will be rotated 5 °.

When the tilt correction amount, that is, the rotation angle of the prism 16 is obtained, it is first determined whether tilt correction is necessary, that is, whether the image tilt correction selection button 32 is selected to perform tilt correction ( Step S10
6) If tilt correction is required, information on the tilt correction amount of the prism 16 is sent to the prism drive motor 17. The rotation of the prism drive motor 17 is performed by the timing belt 20.
Is transmitted to the gear portion of the prism 16 via the
After 6 is rotated by the tilt correction amount (step S107), the sensor system mirror 13 switches the optical path to the photoconductor side (δ → γ) (step S108). Then, the scan mirror 11 is again rotated and scanned, and the magnified projection image is slit-exposed to the photoconductor to form a latent image. This latent image is visualized by the toner charged to a predetermined polarity and transferred onto the transfer paper 18 (step S109).

After the series of image forming processes is completed, the transfer paper 18
If it is selected to perform the tilt correction before the sheet is discharged (step S110), the CPU determines, for example, the prism 16 after tilt correction by the setting of the main body operation unit (step S111). Then, the scan mirror 11 is moved away from the screen side (β → α), and the optical path is switched from the print mode to the reader mode (step S112). By the above operation, a tilt-corrected print image as shown in FIG. 5A is obtained. Further, the enlarged image on the screen 10 is projected in a state in which the inclination is corrected as shown in FIG. Here, assuming that the image tilt correction selection button 32 is set to return the prism 16 to the previous position, that is, the position before tilt correction, as shown in FIG. 6, after the series of image forming processes is finished, the CPU It is instructed to return 16 to the position before the tilt correction (step S113), and the prism drive motor 17 is reversely rotated by the tilt correction amount.
Then, the optical path is switched to the reader mode (step S1
12), the tilt correction operation ends. At that time, the enlarged image on the screen 10 is in the same state as in FIG.

Next, a case will be described in which an enlarged projection image having an inclination as shown in FIG. 4A is subjected to inclination correction only on the screen 10. The work procedure of the image inclination correction device at this time is as shown in FIG. The tilt correction operation is started by pressing the screen image tilt correction switch 33 of the main body operation unit (step S201). The operation in this case is the same as the corresponding operation shown in FIG. 6 described above, and the tilt amount of the image is calculated from the image information obtained by the image sensor 15 (steps S202 to S205), and the prism 16 is adjusted for tilt correction. After rotational driving (step S2
06), at the same time that the sensor system mirror 13 switches the optical path (step S207), the scan mirror 11 switches the optical path from the print mode to the reader mode (step S208), and ends a series of operations. And FIG.
The tilt-corrected magnified image as in (2) is displayed on the screen 10.
Projected above.

As described above, when the tilt correction is performed on the image enlarged and projected on the screen 10 or the tilt correction is performed on the print image, the image tilt correction selection button 32 of the operation unit of the main body. By selecting the screen image tilt correction switch 33 and the screen image tilt correction switch 33, the tilt state of the screen image after tilt correction can be easily selected, and tilt correction can be performed on the screen image as well. . In the above-described embodiment, the case where the worker mounts the films one by one on the fish carrier, projects the image on the screen, and prints out is described. However, this device uses a controller and a roll film carrier to roll the film. This is more effective when a film image is automatically searched to obtain a print image or is confirmed on the screen.

(Second Embodiment) In a microreader printer according to another embodiment of the present invention, a roll film carrier (not shown) is attached instead of the fish carrier 1 of FIG. 1 and a controller ( The automatic search is performed by (not shown), and the other points are the same as those in the first embodiment. FIG. 11 (1) is a diagram showing a screen image before tilt correction, FIG. 11 (2) is a diagram showing a tilt-corrected print image, and FIGS. 12 (1) to 12 (4).
Is a diagram showing a photographed image of a roll film, FIG.
(6) is a diagram showing a screen projection image.

The image on the roll film is sent as it is while being tilted onto the shooting surface due to the effect of the paper (original) feeding performance of the shooting camera or document scanner and the paper quality of the document itself, and is taken as it is. There is also inside.
In particular, a check film or the like in which a check is photographed is inclined to be photographed because the document itself is small. Search for images of such roll film with the controller,
In the case of automatically taking print images, it is not known whether the image of the search frame is tilted or not, and when printing several tens of search frames continuously, the tilted state of each frame is not always the same. It may not be. In such a case, how the microreader printer of this embodiment operates will be described.

The image tilt correction selection button 32 of the main body operation unit in FIG. 3 is set to the front position so that the tilt correction is performed on the print image. In this state, the roll film carrier is loaded with the roll film, and the image frame to be searched is input to the controller. First, this search piece is set to one, and the print is set automatically after the search. Then, when the search start button is pressed, it is assumed that the roll film carrier finds a target frame in response to a signal from the controller, and an image having an inclination as shown in FIG. 11A is projected on the screen 10. Here, tilt correction work is performed, which is as described above. When a series of tilt correction work ends, the printing operation starts, and a tilt-corrected print image is output as shown in FIG. 11 (2). Then, an image before inclination correction as shown in FIG. 11A is projected again on the screen 10.

Next, the image tilt correction selection button 32 of the main body operation unit is set to the rear position. And the search piece is, for example, 10
Set 7 frames from frame 16 to frame 16 and print all of them. It is assumed that the image of the search frame at this time is, for example, the A image shown in FIG. 12 (1) (the image of the blank character A in the figure, the same applies hereinafter) to the G image. As can be seen from the figures, these adjacent frames have their respective adjacent frames tilted substantially line-symmetrically with respect to the widthwise axis of the film. When the search start button of the controller is pressed, the roll film carrier searches for the A image in response to a signal from the controller, and an enlarged image as shown in FIG. 13 (1) is projected on the screen 10. At the same time, the tilt correction operation starts, the tilt amount is calculated, and the prism 16
Is rotated by the tilt correction amount. Then, the print operation is started, and the print image is output. The prism 16 is set to be held at the position after the tilt correction, and the B image of the next frame is tilted symmetrically with respect to the A image.
When the B image is enlarged and projected on 0, the inclination becomes larger than that of the enlarged image of the A image as shown in FIG. Further, after the B image is tilt-corrected and printed out, when the next C image is enlarged and projected on the screen 10, it becomes an image tilted more than the enlarged image of the B image (FIG. 13C). If this is repeated for the D, E, F, and G images, the projected image on the screen may change from a vertical image to a horizontal image at some frame depending on the tilt amount of each frame. Not only will it be difficult to do this, but it will also be impossible to calculate the amount of tilt correction. In such a case, if the image tilt correction selection button 32 is set to the front position and the prism 16 is always returned to the position before the tilt correction after outputting the print image, the tilt correction can be surely performed for each frame.

Next, the image inclination correction selection button 32 of the main body operation unit is set to the front position, and the search frame is set to 10 frames from the 10th frame to the 19th frame, for example, and a case where all of them are printed out is set. . The image of the search piece at this time is shown in FIG.
It is assumed that the images A to J shown in (2) are J images. As can be seen from the figure, all of these pieces are images that are tilted in the same direction at almost the same angle. When the search start button on the controller is pressed, the roll film carrier searches for the A image in response to the signal from the controller, and at the same time the enlarged image as shown in FIG. The amount is calculated, and the prism 16 is rotated by the tilt correction amount. Then, the print operation is started, and the print image is output. Since the prism 16 is set to return to the position before the tilt correction, when the next B image is enlarged and projected on the screen l0, it becomes as shown in FIG. 13 (5). When the B image is tilt-corrected and printed out, the next C image is enlarged and projected on the screen 10 as shown in FIG. 13 (6). Thus D,
The tilt correction is performed for each frame up to the E, F, G, H, I, and J images, and the prism 16 is returned to the position before the tilt correction. However, since the A image to the J image are all tilted in the same direction at substantially the same angle, once the tilt correction is performed on the A image, it is not necessary to correct the tilt after the B image. In such a case, the image tilt correction selection button 32 is set to the rear position and the prism l
If 6 is held at the position after tilt correction, not only a wasteful operation of once tilt correction and then tilt correction is eliminated, but also the subsequent screen image becomes an image without tilt and is easy to see. In this way, if the image tilt correction selection button 32 of the main body operation unit is selected to the front position or the rear position according to the shooting state of the roll film image, proper tilt correction can be performed and the working time can be shortened.

(Third Embodiment) In a micro-reader printer according to still another embodiment of the present invention, when an image for which inclination correction is unnecessary is processed continuously a predetermined number of times, the image is processed subsequently. The inclination of the image is not corrected, and the other points are the same as those in the second embodiment. FIG. 14 is a front view of the main body operation unit of the microreader printer according to this embodiment, and FIGS. 15 and 16 are flowcharts of the image tilt correction operation including the tilt correction stop function of the microreader printer according to this embodiment. .

Let us consider a case where the image shown in FIG. As you can see from the figure, these pieces are A
From the image to the K image, there is no inclination, that is, an image that does not require inclination correction. In such a case, if the tilt correction operation is performed once for all the search frames as described above, the apparatus only fetches the image information and calculates the tilt correction amount, but the prism drive is not actually performed. It only takes a long time. This is the same regardless of whether the image tilt correction selection button 32 of the main body operation unit is set to the rear position or the front position. In order to eliminate this wasteful time, no matter which of the image tilt correction selection buttons 32 is selected, the image tilt correction function is stopped when the images for which tilt correction is not necessary have been performed a certain number of times or more. To achieve this, in this embodiment, FIG.
As shown in FIG. 4, an image tilt correction stop determination button 34 is provided on the main body operation unit. This is a button for determining the number of times an image that does not need to be tilt-corrected continues to stop the tilt correction function or the number of times, and to select the tilt correction stop function. As the setting method, first, the image inclination correction stop decision button 34 is pressed. Then, the left LED blinks, indicating that this state is the state of inputting the number of times of inclination correction suspension. Therefore, the number of tilt correction cancellations is input using the number setting button 25. The input value is displayed on the number display section, and when the number of times is decided, the image inclination correction stop decision button 34 is pressed again,
The LED changes from blinking to lighting, the number of tilt correction cancellations is set, and at the same time, the tilt correction cancellation function is selected. Then, the number display section displays the number of prints again. If the inclination correction stop function is not performed, if the image inclination correction stop determination button 34 is pressed again while the LED is on, the LED is turned off and the selection is canceled.

A case will be considered in which all the print images are taken by automatically searching from the A image to the J image in FIG. 12 (3) using the image tilt correction stop determination button 34, as described above. It should be noted that the description of the operation common to that shown in FIG. 6 is partially omitted. As shown in the flowcharts of FIGS. 15 and 16, the number of times of inclination correction stop is input by the image inclination correction stop determination button 34 and the number of sheets setting button 25 (in this case, for example, 6 times.
301), the image tilt correction selection button 32 of the main body operation unit selects either the front position or the rear position (step S).
302). In this state, the controller sets the search frame from A image to J image (step S303),
Press the search start button (step S304). The roll film carrier searches for an A image by a signal from the controller (step S305), and an enlarged image is projected on the screen 10 (step S306). At the same time, the tilt correction operation is started, and the tilt correction amount is calculated (steps S307 to S315). However, if it is determined that the correction is not necessary, one is counted as the number of times the tilt correction is not performed (step S322). When the print image of the A image is output (step S316),
The roll film carrier feeds the film to B image,
The B image is enlarged and projected on the screen 10 (step S306). Then, the count value M and the inclination correction stop count S are compared (step S308). In this case, since the two values do not match, the tilt correction function is continued. Then, the tilt correction operation is performed again, and the same operation as described above is repeated. When the above-described operation is repeated up to the F image, inclination count correction is not necessary for all of them, so the count value M is added, and when the F image is printed out, the total count value M is 6. Then, when the G image is projected on the screen 10 and the count value M is compared with the tilt correction stop count S (step S308), since both values are equal at this time, the image tilt correction function is stopped. Then, the image tilt correction selection button 32 of the main body operation unit
LED turns off and informs that the image tilt correction function has been stopped. Therefore, after the G image, the print image is output without performing the tilt correction operation.

Next, let us consider a case where a print image is obtained by automatically searching film images A to K as shown in FIG. 12 (4). As you can see from the figure, A
It is assumed that the images from the image to the D image are images without inclination, and the images from the E image onward are images inclined in the same direction and at the same angle. At this time, the image tilt correction selection button 3 of the main body operation unit shown in FIG.
2 to the front position, and the image tilt correction stop decision button 34
The number of times of inclination correction cancellation is set to 4. Then, similar to the above, the automatic search is started. The image A is enlarged and projected on the screen 10, enters the tilt correction operation, and is determined to be an image without tilt. If the tilt correction operation is not performed, one is counted as the number of times tilt correction is not performed. B,
Similarly, no tilt correction is necessary for C and D images.
The count value is added. Then, after the print image of the D image is output and the E image is enlarged and projected on the screen l0, the count value for which the tilt correction has not been performed matches the tilt correction stop frequency, and the image tilt correction function is stopped.
Therefore, after the E image, the tilt is not corrected, and the tilted image is printed out. At this time, the same result is obtained even if the image tilt correction selection button 32 of the main body operation unit is set to the rear position. In such a case, if the image tilt correction selection button 32 is set to the rear position and the number of times of tilt correction stop is set to 5 times or more, the above is not the case. The E image is enlarged and projected, and the tilt correction operation is started.
If it is determined that the tilt correction is necessary and the tilt is corrected, it is not necessary to perform the tilt correction because the images after the E image have the same tilt. That is, the count value that has not been subjected to the tilt correction after the F image is added, and the count value is 5 when the J image is printed out. Therefore, the image inclination correction function is stopped for the K image.

However, even if the number of times the inclination correction is stopped is set to 5, if the image inclination correction selection button 32 is set to the previous position, the following will occur. Since the images A to D do not require tilt correction, the count value is counted up to 4. However, since the E image is an image that needs to be tilt-corrected, the count value is reset to 0 here. Since the prism 16 is set to be returned to the position before the tilt correction, the tilt correction operation has to be performed after the E image as well, so that the K shift from the E image is ended.
The tilt correction is performed for all the images. However, since the E image to the K image have the same inclination, if the prism 16 is set to be held at the position after the inclination correction, wasteful time can be saved as described above. To solve this, even if the previous position is selected with the image tilt correction selection button 32, if the images for which the tilt correction is necessary continue for a certain number of times or more, the image tilt correction selection button 32 is displayed.
Should be automatically switched from the front position to the rear position.

(Fourth Embodiment) In a micro-reader printer according to still another embodiment of the present invention, when the front position is selected by the image inclination correction selection button 32, a predetermined number of times continuously, The image tilt correction selection button 32 is switched from the front position to the rear position when the image is processed by performing the tilt correction at the same angle, and the other points are the same as those in the second or third embodiment. 17 and 18 are flowcharts of the image tilt correction operation including the post-tilt correction position automatic switching function of the microreader printer according to this embodiment.

In this embodiment, the image inclination correction selection button 32 and the number of sheets setting button 2 of the main body operating section shown in FIG.
With 5, the number of times of automatic switching from the front position to the rear position can be input. When both left LEDs of the image tilt correction selection button 32 are off, that is, when the tilt correction function is not selected, pressing once will select the previous position and the LED will light up, and then press again. The rear position is selected and the LED lights up. When it is pressed once more, two LEDs at the front position and the rear position blink, which indicates a state in which the number of times of automatically switching the position setting of the prism 16 after tilt correction can be input. At this time, when the number of times of automatic switching is input by the number of sheets setting button 25, the input value is displayed in the number of sheets display portion, and when the number of times is determined, the image tilt correction selection button 3
When 2 is pressed, the two LEDs are turned on and the number display section returns to the number display. When two LEDs light up together. Indicates that the number of times of automatic switching from the front position to the rear position has been input. Conversely, if the number of times of automatic switching is not entered, the two LEDs will not light together. That is, automatic switching is not possible. If the number of sheets setting button 25 is not touched in the number of times input state, the number of times is not input.

This function (automatic position switching function after tilt correction)
Consider the case of automatically searching for the film image shown in FIG. Note that the description of the operation common to that shown in FIGS. 6, 15 and 16 will be partially omitted. As shown in the flowcharts of FIGS. 17 and 18, the image inclination correction selection button 32 of the main body operation unit shown in FIG. 14 is pressed to enter the automatic switching number, and the number of sheets setting button 25 is pressed to input the number of times, for example, three times. Then, press the image tilt correction selection button 32 again,
The number S2 of automatic position switching after tilt correction is set (step S401). Further, the image tilt correction stop determination button 34 and the number of sheets setting button 25 are pressed, the tilt correction stop count S1 is input as 5 times, and the image tilt correction stop determination button 34 is pressed again to set the tilt correction stop function ( Step S
401). Next, the image tilt correction selection button 32 is again displayed.
Press to set the position of the prism 16 after tilt correction to the previous position (step S402). Then, the search frame is set from the A image to the K image by the controller (step S403), and the search start button is pressed (step S404). In response to a signal from the controller, the roll film carrier searches for an A image (step S405), and an enlarged image is projected on the screen 10 (step S406). At the same time, the tilt correction operation is performed, and the tilt correction amount is calculated, etc. ( Steps S407 to S4
17). However, it is determined that the image A does not need the tilt correction, and the number of times the tilt correction is not performed is counted by one (this count value is M1. Step S42
5). Further, since the B, C, and D images and the inclination correction are not required thereafter, the count value M1 becomes 4. However, since the E image is a tilted image, tilt correction is necessary, the tilt correction operation is performed, and the count value M1 is reset to 0 (step S415). At the same time, the number of times the tilt correction is performed is counted by one (this count value is M2. Step S416). The inclination of the E image is corrected, and a print image whose inclination is corrected is obtained (step S41).
8) Since the position of the prism 16 after tilt correction is set to the previous position, the prism 16 returns to the position before tilt correction (step S426). That is, the inclination correction is necessary for the F and G images, and when the G image is printed out, the count value M2 is 3. Here, when the number of times S2 of post-tilt correction position automatic switching is compared with the count value M2, both values match (step S409), so the position of the prism 16 after tilt correction is switched from the H image to the rear position (step S424). ). At the same time, the lighting of the LED of the image tilt correction selection button 32 of the main body operation unit shown in FIG. 14 is also switched from the front position to the rear position. So I, J,
It is not necessary to perform tilt correction on the K image (step S41).
3), the count value M1 is counted again (step S425).

Similarly, let us consider a case where the film image shown in FIG. 12B is automatically searched from the A image to the K image. As described above, this film image is assumed to be inclined from the A image to the K image in the same direction and at the same angle, as can be seen from the figure. As for the setting of the main body operation unit, similarly to the above, the image tilt correction selection button 32 is pressed to enter the automatic switching count, and the number-of-images setting button 25 is pressed to set the tilt-corrected position automatic switching count S2 to 3 to correct the image tilt correction. The cancel determination button 34 is selected, and the tilt correction cancellation frequency S
1 is set to 5 times (step S401). Further, the image tilt correction selection button 32 is set to the previous position (step S402). Then, the controller starts the automatic search (step S404). An enlarged image of the A image is projected on the screen 10 (step S406), and at the same time, the tilt correction operation is started (step S407). Then, the tilt correction amount is calculated (step S412), it is determined that the tilt correction is necessary (step S413), and at the same time the tilt correction is performed (step S415), the number of times the tilt correction is performed is counted by one (count). Value M2, step S
416). When the tilt-corrected print image is output (step S418), the prism 16 returns to the position before the tilt correction (step S426). Since the B and C images also require tilt correction, the count value M2 becomes 3 when the C image is printed out, and since the count value M2 matches the post-tilt correction position automatic switching number S2, the tilt is applied to the D image and subsequent images. The corrected position of the prism 16 is switched to the rear position (step S424). When the print image of the D image is output and the prism 16 is held at the position after the tilt correction, the E image does not need the tilt correction (step S41).
3) Then, one is counted as the number of times the tilt correction is not performed (count value M1, step S425). F,
Similarly, since the G, H, and I images do not require the tilt correction, the count value M1 becomes 5 when the I image is printed out, and coincides with the tilt correction stop count S1 (step S408). The tilt correction function is canceled from the image. As described above, the image tilt correction operation including the post-tilt correction position automatic switching function is performed.

Although the case where various roll film images are searched has been described above, when the roll film images are automatically searched and printed out, the time can be shortened and the work efficiency can be improved by setting the above-mentioned function. Up.
Further, in this embodiment, the case where the roll film image is automatically searched and printed out is described, but the screen image tilt correction switch 33 is a selectable button, and when the roll film image is automatically searched, the roll film carrier is selected. It is also possible to search for a target frame, perform tilt correction before projecting a magnified image on the screen, and then project a non-tilted image on the screen. As described above, the microreader printer according to the present embodiment has a means for selecting whether to return the prism to the position before correction after the tilt correction or to hold the prism at the position after correction, and to return to the position before the tilt correction. When is selected, when a tilted image, that is, an image that needs tilt correction is continuously set times or more, it has a function of automatically switching to a mode of holding the position after tilt correction. Even if you select either the setting to return to the position before tilt correction or the setting to hold it at the position after tilt correction, if images that are not tilted, that is, images that do not require tilt correction are consecutive for the set number of times or more, In addition, it has a function of canceling the tilt correction and also has a means for correcting the tilt of the enlarged projection image of the screen. These functions are not limited to the method of use in the above-mentioned embodiment, and the tilt correction of the film image which is considered to require the tilt correction,
It can be used when done on screen or in a printed image.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the above-described embodiment, an analog microreader printer using a photosensitive drum has been described, but the present invention increases the number of pixels read by the image sensor 15 and converts the image into digital data for output. Of course, it can be applied to a micro scanner.

Further, in the above-described embodiment, the image sensor 15 is used as the inclination notifying means for notifying the inclination of the predetermined image, and the inclination of the image is automatically corrected according to the result detected by the image sensor 15. However, the present invention is not limited to such an embodiment. For example, the screen 10 is used as the tilt notifying unit, the tilt of the image is manually corrected based on the image projected on the screen 10, and the corrected position is set. It is also possible to configure to hold or automatically return to the initial state.Even in this case, image tilt correction can be performed efficiently and the work time can be shortened. Therefore, it is useful.

[0044]

As described above, according to the present invention, projection means for enlarging and projecting a predetermined image in a microfilm for performing arbitrary processing, inclination notifying means for notifying the inclination of the predetermined image, and A tilt correction unit that corrects the tilt of the predetermined image; a first mode in which the tilt correction unit returns to the pre-correction state after processing on the predetermined image; Since it is possible to select one of the second mode which is held as it is, it becomes possible to efficiently perform the inclination correction of the image,
Work time can be reduced.

Further, a means for determining whether or not the inclination correction is necessary for a predetermined image is further provided, and when the images for which the inclination correction is not required are continuously processed a predetermined number of times, the inclination correction for the image to be subsequently processed is performed. Or when the image is processed by performing inclination correction of the same angle continuously for a predetermined number of times while the first mode is selected, the second mode is set.
By switching to the mode, it is possible to further reduce the processing time for correcting the inclination of the image and avoid wasting time.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a microreader printer according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a drive mechanism of the prism shown in FIG.

FIG. 3 is a front view of a main body operation unit of the microreader printer shown in FIG.

FIG. 4A is a diagram showing a screen image before tilt correction, and FIG. 4B is a diagram showing a screen image after tilt correction.

FIG. 5A is a diagram showing a print image whose inclination is corrected, and FIG. 5B is a diagram showing a print image without inclination correction.

FIG. 6 is a flowchart of a print image inclination correction operation.

FIG. 7 is a flowchart of a screen image tilt correction operation.

FIG. 8 is a block diagram showing a data processing circuit.

FIG. 9 is a diagram showing how an edge portion of an image is projected on an image sensor.

FIG. 10 is a histogram created to obtain an image tilt amount based on the output value of the image sensor 15.

FIG. 11A is a diagram showing a screen image before tilt correction, and FIG. 11B is a diagram showing a print image with tilt correction.

12 (1) to (4) are diagrams showing a photographed image of a roll film.

FIG. 13 is a diagram showing a screen projection image.

FIG. 14 is a front view of a main body operation unit of the microreader printer according to the third embodiment.

FIG. 15 is a flowchart of an image tilt correction operation including a tilt correction stop function of the microreader printer according to the third embodiment.

16 is a flowchart following FIG.

FIG. 17 is a flowchart of an image tilt correction operation including a post-tilt correction position automatic switching function of the microreader printer according to the fourth embodiment.

FIG. 18 is a flowchart following FIG. 17;

[Explanation of symbols]

 1 ... Fish carrier, 2 ... Micro film, 3 ... Projection lamp, 4 ... Condenser lens, 5 ... Condenser mirror, 6 ... Fresnel lens, 7 ... Projection lens, 8 ... Leader system first mirror, 9 ... Reader system second mirror , 10 ... Screen, 11 ... Scan mirror, 12 ... Print system second mirror, 13 ... Sensor system mirror, 14 ... Photoconductor, 15 ... Image sensor, 16 ... Prism, 17 ... Prism drive motor, 18 ... Transfer paper, 19 , 21 ... Timing pulley, 20 ... Timing belt, 22 ... Spur gear, 23 ... Shaft, 24 ... Print button, 25 ... Number setting button, 32 ... Image tilt correction selection button, 33 ... Screen image tilt correction switch, 34 ... Image Tilt correction stop decision button.

Claims (3)

[Claims] 1. In a microfilm projection device, a projection means for enlarging and projecting a predetermined image in a microfilm for performing an arbitrary process, a tilt notifying means for notifying a tilt of the predetermined image, and a tilt of the predetermined image. A tilt correction unit that corrects the tilted image, and a first mode in which the tilt correction unit returns to a state before the correction after processing for a predetermined image; and a second mode that holds the tilt correction unit in the state after the tilt correction. A microfilm projection device characterized in that any one of modes can be selected. 2. A means for determining whether or not tilt correction is required for a predetermined image is further provided, and when an image that does not need tilt correction is processed a predetermined number of times in succession, tilt correction is performed for an image to be processed subsequently. Claim 1 characterized in that there is no
The microfilm projection device according to. 3. The method according to claim 1, wherein when the first mode is selected, when the image is processed by continuously performing inclination correction of the same angle a predetermined number of times, the mode is switched to the second mode. The microfilm projection device according to.