JPS61121659A - Picture reading device - Google Patents

Abstract

PURPOSE:To remove and read an unnecessary picture such as a black frame, etc., by installing a slit at the film supporting member of the projecting means of the film, detecting a slit passing position from a picture reading signal and determining the picture reading scope on the basis of the position. CONSTITUTION:In the four directions of backward and forward and upward and downward of the window at the lower part of a film carrier 117, picture area slits 128a and b are installed. When the projecting image is read, a projecting light through a picture area starting slit 128a is detected, the detecting signal is made into an effective picture area start, a projecting image is read and the recording is started. Next, when the projecting light through a slit 128b is detected, the signal is made into an effective picture area end, and when the reading and recording are completed, the upward and downward slits are installed to select the element to which an effective picture of the sensor array is given, and the effective picture only is correctly recorded by these four slits.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an image reading device, and particularly to an image reading device that reads images from a film.

<Prior art> When reading a fill image with a conventional film projection system, the area outside the effective area of the projected image becomes a black frame part, and if left as is, unnecessary black frames will be read.To avoid this, narrowing the reading area will reduce the effective image. Part of it becomes unreadable.

OBJECTIVES> The present invention aims to eliminate the above-mentioned drawbacks and to provide an image reading device that can remove unnecessary images such as black frames and retrieve them.

(Example) (Outline of mat mechanism) Figure 1 shows a digital color image forming device according to an example of the present invention! 1100, and FIG. 2 is a configuration diagram schematically showing FIG. 1. The present invention will be explained in detail based on FIGS. 1 and 2. An original 20 is placed on the original table glass 1 on a flat surface. The original surface of the original 20 faces the surface of the original platen glass l, and the original 20 is pressed by the pressure plate 1a. The reading head (hereinafter referred to as "reader") 3 that reads the original 20 is equipped with a reading sensor (hereinafter referred to as "CCD") consisting of a CCD array consisting of a plurality of reading elements in three rows for each of the three colors red, green, and blue (hereinafter referred to as R, G, and B). Units)) 17 and
An exposure lamp 19 is placed thereon, and is connected to and driven by a main scanning motor 6a by a main scanning wire 8a. The sub-scanning table 5a supports one end of the main-scanning wire 8a, and supports the sub-scanning wire 10a.
is connected to and driven by the sub-scanning motor 9a.

A recording paper 21 is placed on a placement table 2, and a copy image is recorded by a recording head (hereinafter referred to as a printer) 4. Pudding 4 is yellow, magenta, cyan, black (Y, M, C
, BK) A recording element (hereinafter referred to as a BJ head unit) 18 consisting of a multi-ink jet head for four colors (hereinafter referred to as a BJ head as a bubble jet head was used in the present invention) is mounted, and a main scanning motor is connected to the main scanning wire 8b by a main scanning wire 8b. 6b
is coupled to and driven by.

The sub-scanning stand 5b supports one end of the main-scanning wire 8b, and is coupled to and driven by the sub-scanning motor 9b by the sub-scanning wire 10b.

When trying to obtain a copy image in the above configuration, the reader 3 is connected to the main scanning motor 6a via the main scanning wire 8a.
is driven to reciprocate in the main scanning direction. At this time, the exposure lamp 19 is turned on and the reading sensor 17 reads the document 20 from below and outputs image information as an electrical signal. Based on this electrical signal, the printer 4 is driven by the main scanning motor 6b via the main scanning wire 8b, and prints on the recording paper 21 while reciprocating.At this time, the main scanning direction of the reading head 3 and recording head 4 is In this embodiment, they are set in opposite directions. - After the copying process in the main scanning direction is completed and the exposure lamp 19 is turned off, the reader 3
Then, the printer 4 moves in a direction perpendicular to the main scanning direction, that is, in the sub-scanning direction, to a position where the next main scanning will be performed. At this time, the reader 3 is connected to the sub-scanning table 5a supporting the main-scanning wire 8a.
The sub-scanning motor 9 is also connected to the sub-scanning motor 9 via the sub-scanning wire 10a.
a, it moves to a predetermined position and stops. Further, the printer 4 is driven by a sub-scanning motor 9b via a sub-scanning wire 10b together with a sub-scanning table 5b supporting a main-scanning wire 8b, and moves to a predetermined position and then stops.

(Device control operation...pre-operation) Fig. 3 is a block diagram of the control circuit of the above-mentioned embodiment, and i
FIG. 4 shows a timing chart of the entire sequence, and FIG. 5 shows a flow chart of the program. Figures 4, 5,
First, the outline of the device operation will be explained using Fig. 6, and the step numbers on the timing chart and flowchart
, are the same.

Sequence codon roller 23, image controller 2
4 both have a microcomputer unit in the center,
Sequence control of the apparatus and timing of image data formation are programmed in each, and both microcomputers communicate data via line 39.

To explain the sequence from the time the power is turned on, the sequence controller 23 initializes the copying machine in step 1 according to the flowchart of No. 5rlJ, and then sets the reader in step 2.

What is the head recovery operation that performs the inkjet head recovery operation in step 3? In order to forcibly remove ink stuck to the tip of an inkjet nozzle after a long pause, or to remove a pool of liquid near the tip of the nozzle after ink ejection, use a porous material with good water absorption. This is an operation performed by pushing the material out to the tip of the head or by sliding it in contact with it. In terms of sequence, the printer main scanning motor 6b is rotated in the backward direction and stopped by the detection output of the recovery system position sensor 22. Next, a drive mechanism such as a solenoid that presses the porous member against the head is turned on, and the nozzle tip is rotated. for a specified period of time. After completion, the printer main scanning motor 7b is rotated in the forward direction and stopped by the detection output of the printer main scanning home position sensor 12.

Next, in step 4, the head is capped in order to prevent changes in the viscosity of the ink at the tip of the nozzle while the device is at rest until the copying operation begins. This is achieved by turning on the drive mechanisms such as If it is not a copy start, go to step 5. If it is a copy start, go to step 7 and release the head cap drive to start the copy operation.Next, go to step 8 and start the head drive prior to the copy operation. Perform dry ejection processing.Duty ejection processing is a process performed to perform stable recording, and prevents ejection unevenness at the start of ejection for image formation that occurs due to changes in the viscosity of ink remaining in the inkjet nozzle. Copying downtime is 11f! 1 The process moves to step 9, which is an operation for ejecting and discarding ink in the inkjet nozzle according to the programmed conditions of internal temperature (temperature sensor not shown) and copying duration.
After lighting 9, perform shading correction processing.For shading correction, before scanning the original, a standard white plate, which serves as a reference for white data, is read, and data for correction of aberrations of the optical system lens and sensitivity variations of each bit of the COD sensor is sampled. That's a thing.

Next, the process proceeds to step 10, and it is determined whether or not it is immediately after the start of the copy start. If it is immediately after the start of copying, that is, before the start of the first main scan, the process proceeds to step 11, and if it is the second or subsequent time, the process proceeds to step 12.

In step 11, a recovery operation of the head is performed in anticipation of a long period of suspension of the apparatus.The recovery operation in this case is the same as the operation explained in step 3.

Next, the process advances to step 12 to start main scanning.

(Refer to Figure 6 for each signal.) (? is set for control operation - copying) For main scanning, first, the speed data corresponding to the magnification ratio and the rotation in the forward direction of the reader are sent via line 40 to the motor driver circuit 26a of the reader. Send a start signal and turn on the reader main scanning motor 6a. After taking a delay time to synchronize the reader and printer according to the 0th order magnification ratio, line 41
A rotation start signal in the forward direction of the printer is sent to the motor driver circuit 26b of the printer via the printer main scanning motor 6b to turn on the printer main scanning motor 6b.

Main scanning motor 6a of reader and printer.

The rotation speed of 6b is determined by pulses from rotary encoders 7a and 7b (hereinafter referred to as encoders) for rotation speed detection, respectively.
M) is compared with the rotation speed reference pulse by the motor driver circuits 26a and 28b, and is locked to a predetermined rotation speed by PLL control, resulting in a constant rotation speed. Further, each encoder pulse is sent to the video data synchronization signal generation circuit 28 and the head data synchronization signal generation circuit 3 via lines 42 and 43.
Sent to 8.

(Reader side processing) Next, the process advances to step 13 and a copying operation is performed. The following description will be made with reference to FIGS. 7-e and 7-b. As shown in FIG. 3, the video data synchronization signal generation circuit 28 generates position information in the reader main scanning direction in synchronization with the encoder pulse of the reader main scanning motor 6a, and the effective range of the video data in the resolution statement in the sub scanning direction. Video line enable signals (hereinafter referred to as V, L, E) are generated as shown in FIGS. 6-a and 6-b. Furthermore, based on the video data start signal inputted from the COD drive circuit 29, it outputs a video data napple signal (V, D, E,) which indicates the data effective width of all COD pixels and is synchronized with the encoder pulse. At the same time, each of the three columns on the COD unit 17 is blue (B) in the COD drive circuit 29.

A CCD start signal 'that instructs the COD corresponding to the three colors green (G) and red (R) to read an image is synchronized with the encoder pulse and is supplied through line 57. C
The analog video signals for the three colors read in the OD unit 17 are gain-adjusted so that the sensor sensitivities of each color are equal, and then output as digital values with 8-bit depth through a line 44. At this time, CO
A video data start signal indicating the valid data range of all D pixels is also output from the COD drive circuit 29. B, G, R
Three-color digital video data (hereinafter referred to as video data) is input to a reader synchronization circuit 30.

Here, the video synchronization signal generation circuit 58 will be explained. The video synchronization signal generation circuit 28 receives the signal PHREGP life 45. from the reader registration position sensor 15.
V, L, E.

V. Signals are counted from line 46 and image controller 24 depending on the copy magnification.

The values of L, E, and @ are input through line 47, respectively.
After the COD unit passes the reader registration position for image alignment, the time delay until it reaches the leading edge of the document, that is, the reading start position, is determined by counting V, L, E, and signals, and depending on the copy size. A signal video enable signal (hereinafter referred to as V, E, signal) indicating the reading width in the main scanning direction is outputted and inputted to the reader synchronization circuit 30 via line 48.

In the reader synchronization circuit 30, as shown in FIG. 6-a, B,
Perform alignment operation in the main scanning direction for reading the same part of a COD document corresponding to G and R colors, that is, B
, G, and R. Let L1 be the interval between CCDs corresponding to each color.
When the image at position S1 on the document is input to the CCD corresponding to each color, there is a time lag of Ll/V, where V is the main scanning speed. Therefore, until the image of point S1 is input to the COD of R, which is inputted last in time, the CCD of B and G
The video data is temporarily stored in the buffer memory in the reader synchronization circuit 30 and stored as B, G, and R of the image at point S1.
The three-color video data is output from the reader synchronization circuit 30. In addition, the video data area (V,
D, A) Output a signal. Note that the vertical direction in FIG. 6-c is the time axis, not the sub-scanning direction.

The video data subjected to color matching processing by the reader synchronization circuit is then inputted to a scaling buffer memory 31 and subjected to scaling processing.

(Magnification Variation Process) Here, the magnification variation process will be explained using FIG. 7. The scaling process in the main scanning direction is performed by keeping the printer's scanning speed v1 constant and changing the reader's scanning speed to V 1 /n (n is scaling: IK).

This is because the upper limit of the driving frequency of the inkjet head, which is the printer's image forming means, is lower than the upper limit of the driving frequency of the CCD. is used.

At this time, a variable magnification mode signal is sent from the image controller 24 to the video data synchronization signal generation circuit 28 through line 49 in FIG.

E. The frequency division ratio of the motor encoder pulse of the reader is set so that the signal has a common frequency when the magnification is the same and when the magnification is changed (Figures 7-a and 7-b).

That is, as shown in Figure 7-a, the motor encoder pulse φM
When is the same size, the frequency is divided by 1/6 as shown in φM1, and 1/2
When reducing the frequency by 2 times, the frequency is divided by 1/12 as shown in φM1/2. When increasing the frequency by 2 times, the frequency is divided by 1/3 as shown in φM2, and when it is 3 times the frequency, it is divided by 1/2 as shown in φM2. Divide the frequency. Motor encode pulse φM is 2 times when the frequency is 1/2 of the same frequency.
When it is doubled, it becomes 1/2.When it is 3 times, it becomes 1/3, so φM1. φM2. The frequencies of φM3° and φM1/2 are actually the same frequency.

Fig. 7-b shows the reading position on the document and also shows the moving distance of the COD during a certain time t (sections v, L, E). When shrinking to 1/2, the distance traveled is twice that of the original size, and when expanding to 2 times, the distance is 1/2 compared to the original size.
Moving.

Further, the scaling process in the sub-scanning direction is performed using the video clock φ(CL
R sent from the reader synchronization circuit 30 in synchronization with K8)
, G, and H video signals are stored in a scaling buffer memory 3.
This is done by controlling the address path of the scaling buffer memory 31 when storing data at 1 (FIG. 7-c).

This is achieved by inputting a scaling mode signal from the image controller 24 through the line 5o to the memory control circuit 32 and increasing or decreasing the number of clock pulses of the address counter when writing to the scaling buffer memory 31 in accordance with the scaling ratio. (FIG. 7-d), thereby causing a double buffer memory 59a in the variable-magnification buffer 7 memory 31.

In the memory 59b in write mode (W) of b, data of the same pixel is written to n addresses when enlarged by n times, and 1 pixel out of n pixels is written to 1 address when reduced by 1/n. When data is to be written and the read mode is entered, interpolation and thinning of pixel data will be achieved when the address is incremented by the video clock φ-CLK8.0 In this embodiment, the motor speed on the reading side The motor speed on the recording side may also be changed.

Another function of the scaling buffer memory 31 will now be described with reference to FIG. 7-d. Double buffer memories 59a and 59b in the variable magnification buffer memory 31 are used for writing and reading.

The clock on the address sidewalk is changing, but this is V
, L, E, since the signals are generated from the encoder pulses of the reader main scanning motor 6a.

If uneven rotation of the motor occurs, the accuracy of positional information for each main scanning period over the entire sub-scanning area will be improved, but this will result in unevenness in frequency. In order to synchronize with the V, L, E, and signals and to prevent fluctuations in the COD accumulation time, the COD image reading cycle should be 1/2 or less of the minimum value of the V, L, E, and signal cycles. and shift clock Φ-〇L of CCD17
K4 is a video clock, and in order to have a frequency more than twice that of φ-CLK8, the shift clock φ-LK4 of the CCD 17 is used as the address clock when writing a same size copy of the double buffer memories 59a and 59b, and when reading, The video clock φ-CLK8, which is a synchronization signal for pixel data in the reader and printer, is used.

As described above, the scaling buffer 7 memory 31. In the variable magnification mode, the memory control circuit 32 interpolates pixel data in the sub-scanning direction;
In addition to the thinning operation, the COD accumulation time is kept constant and a pixel reading operation is performed in synchronization with the encoder pulse of the reader main scanning motor 6a.

(Image signal processing) B that has been subjected to the above scaling processing in the scaling buffer memory 31
, G, and R color video data is then sent to an image processing circuit 33.
The process shown in the block of FIG. 8 is performed. First, the video data of R, G, 83 colors is corrected by the shading correction section 6° based on the data of the standard white board read in step 9. In this embodiment, COD
Since the image light is read within a range where the linearity of the exposure amount E and the optical output voltage V is maintained, the following correction is applied.

smax vS=TT TT-■ However, vS; Output V after shading correction ↓COD
output Vmax; output when reading the white board VsmaX; video data corrected by setting output shading is input to the next logarithmic conversion unit 61, where the light quantity value is converted into an ink density value, and at the same time complementary color The B, G, and R video data are converted to y, m, and c density data, respectively. The conversion formula is expressed by the following equation, where the ink density is expressed as Ep, the standard white plate reflected light amount is Ep, and the image light amount is E.

D--10,,1 The three color density data after conversion is then sent to the black extraction/UCR section 62
and is input to the edge extraction section 63.

Black extraction means calculating the amount of black ink to be applied from the density data of the three colors Y, M, and C. This is Y, M, 03
If you try to express black (hereafter referred to as Bk) using colored ink, it will be difficult to express complete black, and the amount of ink will need to be applied.

This is to prevent "bleeding" and excessive expansion of the paper on the copy paper. Further, UCR (undercolor removal) is a method of reducing the amount of ink of each color Y, M, and C in relation to the amount of black ink when black ink is used by black extraction, and in this example, the following formula was calculated. .

Bkw (min (Y, M, C) -al) a
2Youtw (Y-a3Bk) JL4 Moutx (M-a5Bk) as Courx (C-a7Bk) a6 However, a1 to a8 are any number of threads. Edge extraction is based on the edges of the image, the amount of edges extracted by the book used to extract lines. In this embodiment, a 5×5 convolution mask is used in the main scanning and sub-scanning directions. Edges were extracted. In order to remove noise components from the extracted edge amount, we selected an arbitrary threshold so that low-level detection values were not added to the image data. Further, the edge extraction section outputs a video data valid signal (hereinafter referred to as V, D, V, @) indicating the area in which edge extraction is possible using a Laplacian mask while the video is enabled. This means that when using a 5X5 Laplacian mask, V
, E, V after the third wood after No. 9 became active,
This shows that V, D, and V signals are output from L, E, and No. 8.

The density data Y, M, and C after UCR are input to the masking section 64 and subjected to masking processing. Masking is a matrix calculation process to correct turbidity when ink is superimposed due to unnecessary absorption of ink, and the following calculations are performed.

However, &11 to a33 are any number of threads.

Next, the masked Y, M, C three colors and Bk density data are input to the output gradation correction circuit 65, and the subsequent two
Correction can be added to flatten the gradation when expressing pseudo-halftones using the dither method used in the value conversion circuit. The correction formula is shown below.

y out = (asi (Y-JL52) )
”yio ut = (a54(M-ass)
) “Cout −(a57 (C-a5g)
) 9 However, a 51- & 59 are any number of threads.

Next, output gradation corrected density data, Y.

M, C, Bk and edge amount ED are input to the binarization section 66 and subjected to binarization processing.

In this embodiment, the binarization process first uniformly binarizes the image data using a systematic dither method, and then corrects the pixel of interest using edge data ED. In other words, the 8th-
When correction is performed based on the truth table shown in Figure b, an image with blurred edges due to the systematic dithering method becomes a pseudo-halftone expression image with enhanced contours.

The video signal processed by the image processing circuit 33 as described above and converted into binary signals of Y, M, C, Bk, and four colors for the inkjet head (hereinafter referred to as density data) is sent to the leader printer synchronous memory 34. 51.

(Printer side processing) Here, before explaining the operation of the reader printer synchronization memory 34, the head data synchronization signal generation circuit 37 will be explained.
-d, 6-e Printer main scanning motor-6 as shown in figure
The nozzle line enable signal (hereinafter referred to as N
, L, E,') are created.

The N, L, E signals are sent over line 52 to head synchronization signal generation circuit 38. Head synchronization signal generation circuit 38
The signal from the printer register position sensor 16 is input through the line 53, and the time delay from when the BJ head unit 18 passes through the registration position until it reaches the copying position is counted by numbers N, L, E, and 8. A signal indicating the copy width in the main scanning direction according to the copy paper size, that is, a nozzle enable signal for each color (hereinafter N, E,)
The reader via line 54 synchronizes the printer with memory 3
Output to 4.

The reader/printer synchronization memory 34 buffers the speed difference between the reader main scanning motor 6a and the printer main scanning motor 6b, and synchronizes the 1a degree data input from the reader part with the speed of the printer, that is, N, L , E, V, D, V, a from the six image processing circuits 33 that output in synchronization with the signals.
When the signal is input, only the valid portion of the video data is sequentially written in synchronization with V, L, and E, and the Heller synchronization signal generating circuit 38 to N and E are written.

When a signal is input, that is, when there is an inkjet head in the copying area, the density data written in the memory is used as head data to print N and L.

The data of each recording head read out from the printer synchronization memory 34 during the reader, which is sequentially read out in synchronization with E, is outputted to the printer synchronization circuit 35 through a line 55.

In the printer synchronization circuit 35, the color-separated four colors Y, M, C, and Bk of the image of one point of the original S' are inputted via the line 55 when the four colors are surrounded. The head data for each color is subjected to a process of shifting the position by the distance in the main scanning direction between the heads corresponding to each color.

That is, as shown in FIG. 6-f, <Y, M, C.

If the distance between the inkjet heads corresponding to each Bk color is L2, the main It is sufficient to set the scanning speed to V and print each color head with a time delay of L2/V, that is, M, C, B up to the Y head position where the image is printed first in the forward main scanning direction. This is achieved by temporarily accumulating the data for each color in a buffer memory in the printer synchronization circuit 35, and then sequentially outputting it from the synchronization circuit 35 and inputting it to the printer head drive circuit 36. Furthermore, No. 6-f
In the figure, the vertical direction is the time axis, not the sub-scanning direction.

Further, the printer synchronization circuit 35 includes N and E.

A signal is input, and the NE@ number is a signal indicating the copy area of the Y head, and from this NE@ number, a head drive enable signal corresponding to each color (hereinafter referred to as H, D, E) indicating the ejection section of each color head is generated.

signal) is output and input to the printer head drive circuit 36 through line 56. In the printer head drive circuit 36, N, E, signals, N, L.

A drive signal for the inkjet head in the printer head unit 18 and herad data corresponding to each color are output to the printer head unit 18 from E, signal, H, D, E, signal, and clock φ.

According to the above-described flow, the image of the document is read by the reader 3 and formed into an image by the printer 4. When the image controller detects the end of the V, E, No. 8, and N, E signals generated from the reader 3 and printer 4, it determines the end of one line copying of the main scanning and moves to step 14) and step 15.

(Post-processing) In step 15, the sequence codon roller 23 first turns off the exposure lamp 19 and uses the reader.

Each motor driver circuit 26a, 2 of the printer
Input the motor 0FF (7) signal to 8b, then send the reverse direction speed data and rotation start signal, turn on each motor 8a and 8b, start backward movement, and stop at each main scanning home position 11.12. do.

At the same time, in step 16, the reader sub-scanning stepping motor 9a (hereinafter referred to as reader sub-scanning motor) is fed a predetermined number of pulses according to the copying magnification in a rotation mode in the sub-scanning forward direction, and the reader is fed for one sub-scanning. Similarly, the printer sub-scanning stepping motor 9b (hereinafter referred to as printer sub-scanning motor) also performs one sub-scanning step.

Next, the process proceeds to step 17, where the sub-scanning counter is incremented, and in step 18, it is determined whether or not the sub-scanning counter has advanced by the copy width in the sub-scanning direction.If the count has not advanced, the process returns to step 8 and the main scanning is started. Repeat this until the sub-scanning counter increases. When the sub-scanning counter increases, proceed to step 2, and send a predetermined number of pulses to each sub-scanning motor of the reader printer in the sub-scanning backward rotation mode to return to the home position. Next, proceed to step 3, perform a head recovery operation to clean the inkjet nozzle head after copying is completed, proceed to step 4, cap the head, and wait for the input of the next copying command in step 5. Overview of device operation It is.

(Film Projection System) The digital color image forming apparatus 100 of this embodiment can be equipped with a projection exposure means for film projection. It is constructed so that both negative and positive films can be exposed by this projection exposure means, read by the same reading sensor unit 17, and recorded by the same recording head unit 18.

FIG. 9(a) is a perspective view of the projector attached to the main body of the apparatus 100.

Reference numeral 103 indicates a projector 104 for projecting negative and positive films; an arm supporting the projector 103; and an arm 10.
5 is a level for moving the projector 103 up and down. FIG. 9 shows a connecting portion between the rail 105 and the main body 100, and 106 is a microswitch that emits a signal indicating that the projector 103 is attached to the main body 100. When the projector 103 is moved along the rail 105,
The projection surface of the projection Jll 103 is brought into close contact with the original table glass l.

Reading and recording operations are executed by moving the reading sensor unit 17 and the recording head unit 18 in the same way as in the reflection exposure described above.

FIG. 10 shows the internal configuration of the projection 11103.
The direct light emitted by the projection system illumination lamp 115 and the reflected light reflected by the reflection plate 114 are passed through a condenser lens l.
16 and reaches the window of the film carrier 117. The film carrier 117 has a window slightly larger than one frame of negative film and positive slide at the top and bottom,
A film 18 or a positive slide is mounted inside.

The projection light reaching the upper window of the film carrier 117 projects the film 118 to obtain an image.

Color correction is performed through the lower window by a negative color correction filter 120 or a positive color correction filter 119. In general, color correction filters for negatives depend on the type of film, but since those with an orange base are usually used, a filter called an orange mask is used to remove this. In the case of positive film, it is a filter used to correct optical systems such as light sources, lenses, and reading sensors. In the case of negatives, an orange mask and a positive filter may be used together.

In addition, it is not necessary to use a filter for positive, and the positive filter 119 and the negative filter 120 are connected to the fill drive motor 123 and the positive filter position sensor 1z1.
．． The negative filter position sensor 122 allows the negative filter to be moved to any position t. The filter position sensors 121 and 122 are photointerrupters in this embodiment, and output a high level when light is blocked by a shutter. The image color-corrected by the filter is optically expanded by the magnifying lens 124, and then converted into a parallel light image by the Fresnel lens 125. After this, the main body 10
A video signal can be obtained from the reading unit 17 inside the 0. Figure 11 shows a film carrier 117. Inside the carrier, there is a groove the width of the negative film from one end to the other as shown in the figure, and a groove the size of the slide frame near the central lower window. A positive film loading switch 127 allows automatic switching between positive and negative use. Generally, negative film is used as a continuous film of several frames, and positive slides are used by cutting out each frame one by one and attaching a regular slide frame made of cardboard or the like. Therefore, when a negative film is loaded in FIG. 11, the loading switch 127 is not pressed;
When the output signal is at a low level and a repository film is mounted, the mounting switch 127 is pressed and a high level mounting signal is output. In addition, image area slits 128a and 128b are provided on the four sides of the front, top, and bottom of the lower window to automatically recognize the valid image area and remove the black frame that appears in the invalid area.

Used to record only valid images. That is, projection 41
! The sensor unit h17 reads the image projected by 103.
When a video signal is obtained using this method, the video signal represents black in the portion where the projected image does not come, that is, the invalid image processing area, and if it is output as is, black will be printed in areas other than the valid image area.

Therefore, in order to prevent this, image area start sulin) 1
The projection light passing through the image area end slit 128b is detected, and this detection signal is used as the start of the effective image area, and reading and recording of the projected image is started. The image area ends, and reading and recording of the projected image ends. The upper and lower slits are provided to select the elements that can provide an effective image of the reading sensor array made up of multiple elements.
The two slits make it possible to accurately record only the valid image.

FIG. 12 is a block diagram of a sequence control device and an image control device included in the main body 100. In the figure, block 2 is an image control block, and block E is a sequence control block. In block I, 129 is a microcomputer that controls the system, 130, 131
.

Reference numerals 132 denote drive devices for a reflection illumination lamp, a projection illumination lamp, and a color correction filter switching motor, respectively. 133 is a lighting lamp power supply, and the microcomputer 1
The lamp light intensity can be changed between negative and positive by controlling the voltage by the signal from 29. In this embodiment, the lamp power supply voltage is is higher for negative than for positive, and is controlled by the lamp light amount conversion signal. In this case, the lamp light amount conversion signal was set to high level for positive and low level for negative. In block n, 134 is an image control circuit that performs image processing of the video signal.

When performing shading correction, the shading correction circuit 60 includes a RAM 137 that stores data read from a standard white board, and a table ROM 137 that performs shading correction conversion of a video signal based on data read from the standard white board.
Consists of 138. When a shading signal is input from the microcomputer 129 to the image control circuit 134, the one image control circuit 134 writes the RAM 137 according to the address data and the write signal WH.

The standard data obtained by reading the standard white board data is sequentially stored. The reference data and the video signal of the input image are input to the address input of the ROM 138, and the video signal after shading correction is output from the output data line. At this time, the light intensity and color correction filter of the projector illumination lamp change, and the optical characteristics change between negative and positive, so the reference data can be switched using the negative-positive conversion signal, and the shading correction can be changed between negative and positive. , or in either case, shading correction is not performed. In this embodiment, as shown in FIG.
All parts where the standard data of OM138 is input are O.
enters. Therefore, if negative correction data is written to the address corresponding to O, shading correction for negative film will be performed, and the input video signal will be output as is, and if data is written, shading correction will not be performed.

In this embodiment, the input system gradation correction is performed by the logarithmic conversion circuit 61 using a table ROM similarly to the shading correction, and the correction is changed using a negative/positive conversion signal.

Reference numerals 140a and 140b denote a pass buffer and an inversion buffer, respectively, which rotate the video signal in a negative direction when the signal is negative, and rotate it forward in the case of a positive signal, so that a normal image can be obtained. The normal rotation or inversion signal is sent to the crude oil output circuit 62. shown in FIG. 8-a. The signal is input to the edge extraction circuit 63. Finally, a binarized signal is obtained, input to the gate circuit 144, and sent to the printer side.

FIG. 13 is a flowchart of the sequence of this apparatus. The operation will be explained below using FIG. 13. First, in step 1''C, after turning on the power, check whether the projector mounting switch 106 is on or not. If it is off, proceed to step 2 and enter the reflection system mode, and the reflection system illumination lamp 11
Enable 0, disable the illumination lamp 115 of the projector 3, turn off the fan motor 126, and move to step 6.

If the projector mounting switch 10B is off, the process moves to step 3 and enters projector mode. At this time, the reflection system illumination lamp 110 is prohibited, the projection system illumination lamp 115 is enabled, and the fan motor 126 is turned on to start blowing air. After this, turn on the positive film loading switch 127.
Check off.

(1) If the switch 127 is on, the process moves to step 4 and the positive film mounting mode is entered. After that, the signal of the positive color correction filter position sensor 121 is checked to determine whether the positive color correction filter 119 is installed. If it is not installed, the filter drive motor drive signal is turned on and the filter drive motor is turned on. 12
3 and attach the positive filter 119. After that, the negative/positive conversion signal is turned on and the image control circuit 134
The shading correction circuit 136 performs positive correction, and the pass buffer 140 & is enabled to pass the data.Next, the light intensity conversion signal is turned on and the lamp voltage is lowered than in the case of negative to produce positive film. Prepare and move on to step 6.

(■) If the switch 127 is off, the process moves to step 5 and the negative film mounting mode is entered. Thereafter, the signal from the negative color correction filter position sensor 122 is checked, and if it is not installed, the drive motor 123 is driven to confirm that it is installed. After that, either turn off the negative/positive signal and turn off the shading correction in the shading correction circuit 6G, or select correction data different from the negative signal, and enable the inversion buffer to output the video output from the logarithmic conversion circuit 61 for input tone correction. Invert the signal and send it to the next stage.

After this, the light intensity conversion signal is set to low, the light intensity of the lamp is increased, and the process moves to step 6 in preparation for negative film.

In step 6, data such as the size of the recording paper and the magnification ratio are input from the operation panel, the area to be scanned for reading and recording the image is determined using this data, and the copy start key is input. Wait. If there is no input, move to step 1 and prepare for resetting by changing the mode, changing input data, etc. If the copy start key is pressed manually, proceed to step 7, determine whether the currently set mode is shooting mode or reflection mode, and if it is projection mode, proceed to step 8; If there is, the process moves to step 9 in the case of 0 reflection system mode, which has already been explained.

FIG. 14 shows the detailed flow of step 8.

In FIG. 14, first, the illumination lamp of the projector is turned on, and after confirming that the amount of light from the lamp becomes constant, main scanning of the reader is started. At this time, first turn off the image data gate signal to disable the image data gate, and then
Clear the counter that counts from 28 to the valid image area. Next, while determining the output BK signal of the crude oil output circuit 62 in FIG. 12 in step 13, turn on and off the image data gate to extract only the valid image area. and send it to the next stage. This determination will be explained with reference to FIG. 15 as well. Furthermore, CCD
The arrangement direction of the elements is parallel to the longitudinal direction of the slit 128ab. SBK in FIG. 15 shows the black signal level.

Immediately after scanning is started, image data in the area A in FIG. 15, that is, the invalid image area, is sampled. Since the area A is an area where no light comes, the BK multiplied signal shows black. If the image data to be sampled is black, the image data gate circuit 144 is turned off to prevent the data from going to the printer. When the zero-order reading sensor 17 enters the area B, direct light from the slit The image data indicates white. When this is determined, the image data counter is incremented, and when the count-up, that is, the loss of the image data corresponding to the distance from the slit 128 to the effective image area has been counted, the reading sensor 17 moves to the area C. , the image data gate circuit 144 is turned on and image data transmission to the next stage is started. Here, in step 13, the gate is turned off until the image data becomes white, and when one image data becomes white, the process moves to step 14. Swing 14~
In step 16, it is determined that the sampled image data is white, and at the same time a counter is used to perform multiple readings in area B to take measures against disturbances such as noise.In other words, the image data changes from black to white, and the counter If the counter counts up, that point is set as a valid image area, and if data indicating a color other than white comes before the counter counts up, it is determined to be a disturbance and the process returns to step 12. In step 17, it is determined that the reading sensor 17 has entered the effective image area C, and after sending the data to the primary stage and performing necessary image processing, step 10 in FIG.
Return to , and print the processed data on recording paper.

When the copying of one main scanning line is completed, the process returns to step 7, and the above process is performed for the next main scanning, and the following readings are carried out, and when the number of sub-scanning reaches the number that covers the effective image area, the copying is completed. Proceed to step 1 to prepare for the next copying operation.

As explained above, according to the present invention, when copying a projected image of a film using a projection device, it is possible to align the projection device and the reading means with no more precision than necessary. , it becomes possible to copy a book without unnecessary and undesirable shadows outside the effective image area.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an apparatus according to an embodiment of the present invention, FIG. 2 is a schematic perspective view of an apparatus according to an embodiment of the present invention, FIG. 3 is a block diagram of a control circuit according to an embodiment of the present invention, and FIG. 4 is a sequence diagram. Timing chart diagram, Figure 5 is a sequence flowchart diagram,
Figure 6-a is a diagram showing the relationship between the reader's document and the reading synchronization signal, Figure 8-b is an enlarged view of part A in Figure 8-a, and Figure 6-c is an explanation of the positional deviation of each color reading COD. Figure 6-d is a diagram showing the relationship between the copy paper and the recording synchronization signal, Figure 6-e is an enlarged view of part B in Figure 6-d, and Figure 6-f is a diagram showing the relationship between the copy paper and the recording synchronization signal. Accompanying explanatory diagrams, Figure 7-a is a diagram showing the frequency division timing according to the variable magnification of the encoder pulse of the reader main scanning motor, and Figure 7-b is a diagram showing the reading pixel interval in the main scanning direction according to the variable magnification. 7-C is an explanatory diagram of the interpolation 1 decimation operation according to the scaling factor, FIG. 7-d is a detailed circuit diagram of the scaling buffer memory 31 in FIG. 3, and FIG. 7-e
3 is a detailed circuit diagram of the video data synchronization signal generation circuit 28, and FIG. 7-f is a timing chart of the video data synchronization signal. 8-a is a detailed circuit diagram of the image processing circuit 33, FIG. 8-b is a diagram showing the input/output relationship of the edge extraction circuit 63 in FIG. 8-a, and FIG. FIG. 9(b) is a perspective view of the main body 100, FIG. 9(b) is a partially cutaway view of the projector 103, FIG. 10 is a control flowchart showing the internal configuration of the projector 103, and FIG. 15 is an explanatory diagram of the effective image area. Figure 6-0 Moe et al-b diagram Cri/Eli Y area question No. ``r-b diagram door v, L, E1M Shuman Figure 10

Claims (1)

[Claims] It has a reading means for scanning an image, a film projection means, and a support member for placing the film on the projection means,
An image reading device characterized in that a slit is provided in the support member, a slit passing position is detected from an image signal from the reading means during image scanning, and an image reading range is determined based on the slit position.