JPS61154261A - Microfilm picture reader - Google Patents

Abstract

PURPOSE:To attain scanning by the range in response to the amount of a picture signal to be transmitted from an output point of time of a picture transmission start signal by counting a picture synchronizing signal number from the output point of time of the picture transmission start signal and completing the transmission of the picture signal when the count reaches the amount of the picture signal to be transmitted. CONSTITUTION:The 1st control means controlling a transmission timing of the picture transmission start signal notifying the transmission start of the said picture signal in response to the read start position signal transmitted from a command means and the 2nd control means counting a picture synchronizing signal number from the output point of time of the picture transmission start signal and completing the transmission of the picture signal when the count reaches the amount of picture signal to be transmitted are provided. For example, the picture transmission start signal 34 is outputted at the left end X1 point of a read object picture to start the transmission of a picture signal 35. A CPU 33 starts the count of the picture synchronizing signal 36 at the same time and when the count reaches a prescribed value, since the position of a two-dimensional image sensor is coincident with the right end X2 point of the read object picture, the inversion of scanning or the transmission of the picture signal 36 is stopped at that point of time.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a microfilm image reading device that electrically reads images recorded on microfilm and prints out the read image information using a laser beam printer, inkjet printer, etc. Regarding.

[Prior Art] In recent years, image information recorded on microfilm is optically projected and a one-dimensional or two-dimensional photoelectric conversion element (for example, CCD) is scanned on the image plane.
Various microfilm image reading devices for reading image information have been proposed.

Image information signals output from these image reading devices are obtained as hard copies in digital printers such as laser beam printers and inkjet printers, and in CRTs.

In display devices such as liquid crystal display devices, it is converted to soft copy. Furthermore, the image information signal is stored in a high-density memory such as an optical disk and is used for subsequent image processing.

When connecting an external device such as the above-mentioned printer to such an image reading device, when transmitting an image information signal, it is necessary to transmit an image transmission start signal to the external device in advance. A reader is configured.

By the way, the present applicant has proposed an instruction means for specifying an image read position, and an instruction means for specifying an image read position in an image reading apparatus that transmits an image transmission start signal when transmitting image information obtained from an image sensor. An apparatus has already been proposed which includes a control means for controlling the sending timing of the image sending start signal in response to the signal sent from the image sending start signal.

This device has a configuration as shown in FIG.

In FIG. 1, an image frame 1 of microfilm is used by a halogen lamp 2 and a condenser lens 3. The projected image of the image frame 1 is transmitted to a one-dimensional image sensor (using COD, for example) via an imaging lens 4 and a fixed mirror 5.
The image is formed on the scanning plane of 6.

The one-dimensional image sensor 6 is fixed to a carriage 9I that can be moved horizontally along a guide 7.8, and the image can be scanned and read by driving a wire 10 suspended from the carriage 9 with a motor 11. Execute.

A light shielding plate 21 is fixed to the carriage 9, and the scanning start position is determined by shielding a photointerrupter 20 fixedly arranged on the main body of the apparatus.

There are two stable states 'f@ between the imaging lens 4 and the mirror 5.
A switching mirror 19 that can take either (a) or (b) is disposed, so that the image frame 1 is also imaged on the screen 13. A cursor 14 is provided on the screen 13 and is movable from point a to point a, and is driven by a driving means (not shown).

The cursor 14 is on the screen 13. It is used to detect the position at h, and is configured integrally with a linear potentiometer. That is, an output voltage of voltage Vmin is output at point a and voltage Vmax is output at point b.

FIG. 2 shows the detailed configuration of the linear potentiometer described in -. As is clear from this figure, the cursor movement distance #
A voltage Vx proportional to X is obtained.

Therefore, by sliding the cursor 14 along the guide 16, the coordinates on the screen 13 between points a and b can be detected, and based on this coordinate data, an image transmission start signal is transmitted. Deciding on the timing. Note that the scanning start point of the one-dimensional image sensor 6 positioned by the photointerrupter 20 and the point a of the cursor 14 are
The points are adjusted in advance so that they match optically.

Therefore, as shown in FIG. 3, when one image (the image labeled "A11" in the figure) is displayed on the display screen 13 as shown in FIG. By positioning the cursor 14, the output timing of the image transmission start signal can be specified as point X1 at the leading edge of the image in the case of this figure (A), and point X3 at the leading edge of the image in the case of this figure (B). , when the sub-scanning point of the one-dimensional image sensor 6 comes to the position corresponding to X in the case of wood grain (A), and when it comes to the position corresponding to X3 in the case of wood grain (B), respectively. A start signal can be output.

In this case, the scanning range of the one-dimensional image sensor 6 is of course up to the maximum point b at the end of the screen 13, but in the case of wood grain (A), it extends up to point X2 at the end of the image. , wood grain (B), it is sufficient to move up to point X4, which is the end of the image, and it is desirable to cut off the image signal transmission at this point and reverse the scanning.

However, when the starting position of the one-dimensional image sensor 6 is determined by the photo ink printer 20 in the above-mentioned conventional apparatus, the ending position X2 + X is determined in the same manner.
It was impossible to determine the four points due to the configuration of the apparatus. [Object 1] In view of the points mentioned above, the present invention aims to In an image reading device that changes the output timing of a transmission start signal as appropriate, there is provided a microfilm image reading device that scans only an area corresponding to the amount of image signal to be transmitted from the output point of the image transmission start signal. The purpose is to provide.

In order to achieve the objective, the present invention provides an image reading means for raster scanning an image recorded on a microfilm and outputting an image signal, and a display means for displaying an image of the microfilm read by the image reading means. , an instruction means for specifying the reading start position of the image displayed on the display means, and controlling the sending timing of an image sending start signal for notifying the start of sending the image signal in response to the reading start position signal sent from the instruction means. a first control means for counting the number of image synchronization signals from the time when the image transmission start signal is output, and a second control for terminating the transmission of the image signal when the count value reaches the amount of the image signal to be transmitted; It is characterized by comprising means.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 4 shows a schematic configuration example of the main parts of the apparatus of the present invention.

Other parts are the same as those in FIGS. 1 to 3, so detailed explanation thereof will be omitted. In FIG. 4, an image synchronization signal according to image scanning is generally required between a device N31 for digitally reading microfilm images and an external device 32 such as a digital printer or display device. This image synchronization signal is a synchronization signal between scanning in the element row direction of the one-dimensional image sensor 6 as shown in FIG. 1 (hereinafter referred to as main scanning) and, for example, printing scanning of the digital printer 32. It is something. In Figure 4,
34 is the above-mentioned image transmission start signal, 35 is an image signal, 38
is an image synchronization signal.

The above-mentioned image synchronization signal 36 has a recording density of 16pe, for example.
When printing 1■ in the case of a + (bell) printer 32, the CP in the reading device 31 is sent from the printer 32 16 times.
This is sent to U (control unit) 33. Therefore, if the image labeled "A" in Figure 3 (A) is an image of a size equivalent to A4 size, the horizontal dimension of A4 size is 210 m.
m, so the CPU 33 converts this image synchronization signal 3B by 18X.
It is sufficient to send out the image signal 35 while counting 210 times. Note that, as a matter of course, the scanning speed (sub-scanning speed) of the one-dimensional image sensor 6 in the direction of the guide 7
It is assumed that the paper feeding speed of the printer 32 and the paper feeding speed of the printer 32 are synchronized.

Therefore, as shown in the flowchart in Figure 5,
In case A), the image transmission start signal 34 is outputted at the left end (starting end) X1 point of the image to be read (step St), and transmission of the image signal 35 is started (step S2). At the same time, the CPU 33 starts counting the image synchronization signal 36 (step S3), and this count value is 18X2.
10 (step S4), the position of the two-dimensional image sensor 6 is at the right end (end end) of the image plane to be read.
Since the point coincides with point X2, the scanning is inverted or the transmission of the image signal 3B is started at that point (step S5).

In the case of FIG. 3(B), - the same processing as described above is performed. Further, the size of the image plane to be read may be specified using a key button (not shown) in the reading device 31 and stored in the CPU 33. That is, in this example, the image size II A 11 is assumed to be an A4 size, but the image size is not particularly limited to this size. In addition, the pair of cursors 14 allows
Alternatively, by specifying the coordinates of the X1 point and X2 point or the X3 point and X4 point in FIGS.
Alternatively, the count number may be set by calculating the length between X3 and X4, thereby changing the count number of the image synchronization signal 3B.

In addition, in order to simplify the explanation, this example assumes that the operation is performed under a predetermined constant magnification, but it is also possible to perform the magnification change operation by providing a variable magnification means. Of course there are.

[Effects] As explained above, according to the present invention, the image synchronization signal is counted from the output point of the image transmission start signal changed according to the image area recorded on the microfilm, and the count value is set to a predetermined value. Since the scanning is stopped or reversed when the value is reached, it is possible to scan only the range corresponding to the amount of image signals to be sent, and more efficient image transmission can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of the configuration of a microfilm image reading device according to the present invention, Fig. 2 is an enlarged front view of the main parts, and Figs. 3 (A) and (B) are on the screen of Fig. 2. 4 is a block diagram showing an example of the main part configuration of the device of the present invention, and FIG. 5 is an example of a control procedure stored in the control means (CPU) of FIG. 4. It is a flowchart which shows. DESCRIPTION OF SYMBOLS 1... Image frame of microfilm, 6... Image sensor, 13... Screen, 14... Cursor, 20... Photo interrupter, 31... Reading device, 32... External device, 33...CPU, 34...Image transmission start signal, 35...Image signal, 36...Image synchronization signal. CA) j-+ 33

Claims (1)

[Scope of Claims] Image reading means for raster scanning an image recorded on a microfilm and outputting a read image signal; a display means for displaying an image of the microfilm read by the image reading means; and the display. Instructing means for specifying a reading start position of the image displayed on the means, and controlling transmission timing of an image transmission start signal for notifying the start of transmission of the image signal in response to a reading start position signal sent from the indication means. a first control means for counting the number of image synchronization signals from the time point when the image transmission start signal is output, and when the count value reaches the amount of the image signal to be transmitted, a first control means for terminating the transmission of the image signal; 2. A microfilm image reading device comprising: 2.