JPS61295757A - Reader - Google Patents

Abstract

PURPOSE:To facilitate the operation of an operator by providing a readout means which reads a record image optically and converts it into an electric signal, a means for recognizing a mark indicating the image position, and a decision means which outputs the size signal of the image on the basis of the symbol signal from decision means. CONSTITUTION:Binary-coded data B (Bl2, Bl3) is divided by a data selector 20 into a blip mark part M (Ml2, Ml3) and an image data part D (Dl2, Dl3). The signal of a blip mark part M (Ml2, Ml3) is checked by a serial pattern comparator 26 with respect to a bit pattern to check whether there is a blip mark (m) or not. A counter 27 counts a trigger signal (k) from a synchronizing signal generating circuit 23 while regarding a trailing edge of a pulse of the output 0 of the serial pattern comparator 26 to the next trailing edge as a gate time. The counted value is nearly constant according to image size because the feed speed of a microfilm is constant. For the purpose, a window comparator 28 compares the output of the counter 27 with a specific size value to obtain image size information SIZ.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a reading device that reads data using a sensor such as a microfilm that records a plurality of data and converts the data into electrical signals for processing.

<Prior Art and Problems> Conventionally, in a device that searches for a desired image on a roll of microfilm containing a large number of images and transfers the image data to a built-in or external printing device or auxiliary storage device,
The operator projects the image on a viewer attached to the device and makes judgments from the projected image to obtain paper size information necessary for printing the searched image and data size information necessary for storage.

For this reason, the operator has to judge the image size each time the desired image data on the microfilm is transferred, making the operator's operations complicated, and remote control is difficult when going online. It had some drawbacks.

Purpose> An object of the present invention is to eliminate the drawbacks of the above-mentioned conventional example and to simplify the operator's operations when reading a film or the like.

Summary: In order to prevent the inconvenience of determining the size of multiple images on a film, etc., what is stated in the specification and drawings is based on the claims, so that the size of multiple images on the medium may vary. However, processing such as copying can be easily accomplished.

<Embodiment> FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a perspective view of a film feeding section and a reading section at a reading position in an embodiment of the present invention.

The microfilm F in the cartridge 1 is sent in the S direction at a constant speed by capstans 71 and 72 and wound onto the take-up reel 8.

At this time, image information (character or code information, etc.) on the microfilm F is read by an image line sensor (hereinafter referred to as COD) 16 via a light source 12 and optical systems 13 to 15. As shown in FIG. 3, the microfilm F consists of an image area D of di-d4 of different sizes and a mark area M of blip marks m1 to m4 indicating frame positions.

FIG. 4 shows a signal A sentence 2 in which the signal g read by the image line sensor 16 is amplified by the amplifying section 17. A-cross 3 is shown. The signal A2 corresponds to the vertical 2 part of the microfilm shown in FIG. 3, and the signal A13 corresponds to the 13 part.

Signal 8 sentences 2. B standing 3 is the signal AfL2. A/D converter 18 for each A sentence 3. Magnitude comparator 1
9. Signal A12. A sentence 3
Or Bi2.

B13 is the blip mark part M sentence 2 as shown in Figure 4.
．． It is composed of an M sentence 3 and an image data portion DfL2°Bi3.

The shift clock of C0D16 is generated by the clock generation circuit 24.
, one line of sampling of C0D1B is obtained from
The time is determined by the trigger signal k from the synchronization signal generation circuit 23. The trigger signal is synchronized with an encoded signal of a pulse generated by the rotation of the capstan 71, 72 (outputted by sensing a pulse disk provided on the capstan shaft). Since the output of the C0D 16 is a weak signal, it is amplified by the amplifier 17. Amplified signal A (
Au2, Au3) are digitized by an A/D converter 18, and further binarized by a magnitude comparator 19 using an optimization threshold C in order to binarize into white and black information. Binarized data B (BJ12.B sentence 3)
is the blip mark portion M (M
Sentence 2. MJL3) and image data part D CD12. D!
;L3). This division is one part of the read data.
This is done by counting the width corresponding to the blip mark portion M in the line direction using the counter 25. That is, after the counter 25 is reset by the trigger signal k for each line, the data B is set to Md while the clock f is counted M times.

The image data part signal is sent to serial-parallel converter circuit 2.
1, it is converted into n-bit, for example, 8-bit parallel data, and transferred to a FIFO buffer (buffer that can input and output simultaneously). The signal of the blip mark portion M (M or 2.Mn3) is also checked for bit pattern by a serial pattern comparator 26. Check whether this is a Mn2 pattern or an MjL3 pattern as shown in Figure 4,
The former corresponds to a case where there is a blip mark m, and the latter corresponds to a case where there is no blip mark m.

Furthermore, bit patterns other than those mentioned above may also be read at the front and rear ends of the blip mark m. For example, the fifth
As shown in the figure, this is the case where the sentence is 11°, 14°. The bit pattern at this time is shown in i. In this case, the serial pattern comparator 26 considers the pattern to be the same as the previous pattern and processes it. 111 is considered to be the same pattern as sentence 10, and standing 14 is considered to be the same pattern as standing 13 (signal j). The output 0 of the serial pattern comparator 26 can be easily obtained by the DF/F 30 shown in FIG. 5 using the signal j and the trigger signal.

Therefore, the counter 27 is connected to the serial pattern comparator 2.
The trigger signal k from the synchronizing signal generating circuit 23 is counted from the falling edge of the pulse of the output O of No. 6 to the next falling edge as a gate time. Since the feeding speed of the microfilm is constant, the counted value is approximately constant depending on the image size. Therefore, the image size information SIZ is obtained by comparing the output of the counter 27 with a predetermined size value using the window comparator 28. Using this signal, it is possible to automatically select the paper in the cassette of the same size when a film image of that size is enlarged to a specified extent, and also to display the size, and if the paper size is specified, the size The magnification can be automatically set by comparing the image size and the film image size.

Note that the A/D l 8 and the comparator 19 are reset for each read line by the trigger signal k. The present invention is effective in reading not only microfilm but also media having continuously recorded images.

Effects> As described above, since the size of a recorded image can be determined when reading multiple images of microfilm, etc., the operator's operations for size recognition can be reduced, which is effective in automating the film reading operation.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a film reading device of the present invention according to an embodiment, Fig. 2 is a perspective view showing a film feeding section and a reading section of an embodiment of the present invention, and Fig. 3 is used in this embodiment. A diagram showing the microfilm, Figure 4 is a diagram showing the signals of parts A and B in Figure 1, and Figure 5 is a diagram showing the serial pattern comparator 2.
6 is a diagram illustrating the operation of 1---- one cartridge, 8-- take-up reel, 71.72-- one capstan, 12---- light source, 13.15-- Optical lens, l6---CCD.

Claims (1)

[Claims] A device for reading a medium on which a plurality of images are recorded, comprising a reading means for optically reading recorded images and converting the recorded images into electrical signals, a means for recognizing a symbol indicating the image position, and a symbol signal based on the symbol signal from the recognition means. 1. A reading device comprising: determination means for outputting an image size signal.