JPS61121648A - Picture reader - Google Patents

Abstract

PURPOSE:To obtain an optimum read picture signal for both a negative and a positive film by providing a means switching the luminous amount of a lamp of a projecting means depending whether the film is a negative film or a positive film. CONSTITUTION:A signal from a microcomputer 129 controls a voltage to switch the luminous amount of a lamp depending on a negative or a positive film in a lighting lamp power supply 133. The lamp power supply voltage is higher for a negative film than a positive film and the voltage is controlled by a lamp luminous amount converting signal. Thus, the luminous amount of a projection system lighting lamp 115 is controlled. In this case, the microcomputer 129 controls the power supply 133 based on a detection signal representing the negative/positive film depending on the operation of a positive film loading switch 127 provided with a film carrier.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an image reading device for reading film images, and particularly to a device capable of reading both negative and positive films.

<Prior Art> When obtaining an image signal from a film, the amount of transmitted light is different between a negative film and a positive film, and the signal level obtained by a reading means is not constant.

(Objective) In view of the above-mentioned problems, it is an object of the present invention to provide an image reading device capable of obtaining optimal reading image signals for both negative and positive films.

(Example) (Overview of Apparatus Mechanism) FIG. 1 is a perspective view of a digital color image forming apparatus 100 according to an embodiment of the present invention, 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. A document 20 is placed on the document table glass 1 on a flat surface. The document surface of the document 20 faces the surface of the document table glass l. , the original 20 is pressed by the pressure plate 1a.The reading head (hereinafter referred to as a reader) 3 that reads the original 20 has three colors of red, green, and blue (hereinafter referred to as R, G, and B).
A reading sensor (hereinafter referred to as a COD unit) 17 constituted by a COD array consisting of a plurality of reading elements in each column and an exposure lamp 19 are placed thereon, and are 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 is connected to and driven by the sub-scanning motor 9a by the sub-scanning wire 10a.

A recording paper 21 is placed on a recording 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 stage 5b supports one end of the main-scanning wire 8b, and is connected to and driven by the sub-scanning motor 9b by the sub-scanning wire lOb.

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.6 At this time, the reading head 3
In this embodiment, the main scanning directions of the recording head 4 and the recording head 4 are set to be opposite to each other. - After the copying process in the main scanning direction is completed and the exposure lamp 19 is turned off, the reader 3 and the printer 4 move in a direction perpendicular to the main scanning, that is, in the sub-scanning direction, to the position where the next main scanning is to be performed. At this time, the reader 3 is connected to the sub-scanning table 5 supporting the main-scanning wire 8a.
a and is driven by the sub-scanning motor 9a via the sub-scanning wire 10a to move to a predetermined position and stop F=. 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 gb, and moves to a predetermined position and then stops.

(Device Control Operation...Preliminary Operation) FIG. 3 is a block diagram of the control circuit of the above-described embodiment, FIG. 4 is a timing chart of the entire sequence, and FIG. 5 is a program flowchart. Figures 4, 5,
First, an outline of the operation of the apparatus will be explained using FIG. In addition, the step No. 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.

Let me explain the sequence from when the power is turned on.

In accordance with chart 70 in the sequence controller 23ttaS diagram, initial settings of the copying machine are performed in step 1, and then as a reader in step 2.

The printer returns to its home position for main scanning and sub-scanning.Next, in step 3, the inkjet head recovers.The head recovery operation forcibly prevents ink from sticking at the tip of the inkjet nozzle after the machine has stopped for a long time. In order to remove the ink, and furthermore to remove the liquid pool near the nozzle tip after the ink ejection operation, this operation is performed by pressing a material with good water absorption such as a porous member against the head tip or sliding it in contact with the head tip. In terms of sequence, the printer main scanning motor 6b is rotated in the backward direction, stopped by the detection output of the recovery system position sensor 22, and a drive mechanism such as a solenoid that presses the porous member against the head is turned on.
Press it against the nozzle tip 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 empty discharge processing. The idle ejection process is a process performed to ensure stable recording, and is performed on the copy pause surface to prevent uneven ejection at the start of ejection for image formation caused by changes in the viscosity of the ink remaining in the inkjet nozzle. 0 Next, the process moves to step 9, in which the document exposure lamp 19 is turned on. After performing shading correction processing, shading correction involves reading a standard white plate that serves as a reference for white data before scanning the original, and sampling data for correcting aberrations of the optical system lens and sensitivity variations of each bit of the CCD sensor. It is.

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, 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.) (Device control operation - copying) For main scanning, first, a signal is sent to the motor driver circuit 26a of the reader via line 40 to provide speed data corresponding to the magnification ratio and a rotation start signal in the forward direction of the reader. The reader main scanning motor 6a is turned on. After taking a delay time for synchronizing the reader and printer according to the magnification ratio, line 41
A rotation start signal in the forward direction of the printer is sent to the motor dryer 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 rotational speed of 6b is determined by pulses from rotary encoders 7a and 7b (hereinafter referred to as encoders) for rotational speed detection (FG multiplied signals are sent to motor dry/to circuits 28a and 26b).
The rotation speed is compared with the rotation speed reference pulse and 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 38 via lines 42 and 43.

(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 digit 2 information in the reader main scanning direction in synchronization with the encoder pulse of the reader main scanning motor 6a, and outputs the valid video data in the resolution statement in the sub-scanning direction. Video line enable signals (hereinafter referred to as V, L, E) indicating the range are generated as shown in Figures 6-a and 6-b. Furthermore, based on the video data start signal inputted from the CCD drive circuit 29, a video data enable signal (V, D, E, ) which indicates the data effective width of all pixels of the COD and is synchronized with the encoder pulse is output, and at the same time. Each of the three columns on the COD unit 17 is blue (B) in the COD drive circuit 29 .

A COD start 434'i which instructs the COD corresponding to the three colors green (G) and red (R) to read an image is supplied through the line 57 in synchronization with the encoder pulse. The analog video signals for three colors read in the CCD 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, the video data start signal indicating the valid data range of all CCD pixels is also sent to the CCD drive circuit.

The signal is output from path 29. Digital video data of three colors B, G, and R (hereinafter referred to as video data) is sent to the reader synchronization circuit 3.
It is input to 0.

Now, to explain the video synchronization signal generation circuit 58, the video synchronization signal generation circuit 28 receives a signal PHREGPul/4 from the reader registration position sensor 15.
5. 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 signals are input through lines 47, respectively;
After the CCD unit passes the leader registration position for image alignment.

The time delay until reaching the leading edge of the document, that is, the reading start position, is determined by counting the V, L, E, and signals.
Further, a signal video enable signal (hereinafter referred to as V, E, signal) indicating a reading width in the main scanning direction according to the copy size is outputted and inputted to the reader synchronization circuit 30 via a 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 the position S1 of the original 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 51-point image is input to the E CCD, which is inputted last in time, the B and G CCDs are
The video data from S1 is temporarily stored in the buffer memory in the reader synchronization circuit 30, and B, G, and R3 of the image at point S1 are stored.
The color video data is output from the reader synchronization circuit 30 in its entirety. 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 scanning direction is performed by keeping the scanning speed Vl of the printer constant and changing the scanning speed of the reader to Vl/n (n is the scaling ratio).

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 it is the same size, it is divided by <1/6 as shown in φM1, and the frequency is divided by 1/2.
When reducing the frequency by 2 times, divide the frequency by <1/12 as shown in φMl/2, when expanding by 2 times, divide the frequency by 1/3 as shown in φM2, and when increasing by 3 times, divide the frequency by <1/12 as shown in φM2. Divide the frequency. Motor encode pulse φM is 2 when its frequency is 1/2 of the same frequency.
φMl, φM2. The frequencies of φM3° and φM1/2 are actually the same frequency.

Fig. 7-b shows the reading position on the document and the moving distance of the CCD during a certain time t (=V, L, E sections). When you reduce the size to 1/2, the distance traveled is twice that of the original size, and when you enlarge it to 2 times, the movement distance is 1/2 compared to the original size.
2 Move.

The scaling process in the sub-scanning direction is performed using the video clock φ(CL
This is done by controlling the address path of the scaling buffer memory 31 when each pixel of the R, G, and H video signals sent from the reader synchronization circuit 30 in synchronization with K8) is stored in the scaling buffer memory 31. (Figure 7-c).

This is achieved by inputting a scaling mode signal from the image controller 24 through a line 50 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 scaling buffer memory 31.

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

Here, using diagram 5g7-c1, the variable magnification buffer 7 memory 31
Let me explain another function of . The double buffer 7 memories 59a, 59b in the variable-magnification buffer memory 31 switch the address clocks during writing and reading.

This is the V, L, E, signal is the reader main scanning motor 6a
Since the encoder pulses are generated from encoder pulses, if uneven rotation of the motor occurs, the positional information between each main scan over the entire sub-scanning area will be accurate, but the frequency will be uneven. V, L,
In order to synchronize with the E, signal and not to cause fluctuations in the COD accumulation time, the image reading cycle by COD is set to be less than 1/2 of the minimum value of the cycle of the V, L, E, and C signals.
Since the shift clock φ-CLK4 of the CD 17 has a frequency more than twice that of the video clock φ-CLK8, the address clock when writing a same size copy of the double buffer memories 59a and 59b is the shift clock φ- of the CCD l7.
〇Using LK4, when reading, video clock φ-C, which is a synchronization signal for pixel data in the reader and printer, is used.
It uses LK8.

As described above, the variable magnification 8tsufa 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 2B integration time of CG and D 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.
and undergoes the processing shown in the blocks of FIG.

First, the video data of R, G, and 83 colors is corrected by the shading correction section 60 based on the data of the standard white plate read in step 9. In this embodiment, the COD exposure amount light output voltage V is Since the image light is read within a range where linearity is maintained, the following correction is applied.

smax vs=TiτT−■ However, Vs: Output after shading correction V, CO
Output Vmax from D; Output Vsmax when reading the white board; Video data that has been corrected for setting output shading is input to the next logarithmic conversion unit 61, where it is converted from a light amount value to an ink density value. Complementary color conversion is performed, and 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 D is the ink density, Ep is the standard white plate reflected light amount, and E is the image light amount.

E D=-Sentence Ogr The three color density data after conversion is first black extracted/UCR unit 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, C3
This is because if you try to express black (hereinafter referred to as Bk) with colored ink, it is difficult to express complete black, and the amount of ink applied is large, 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. .

Bk= (min (Y, M, C)-al) a2Y
out= (Y-a3Bk)a4 Mout= (M-asBk)at3 Cou r= (C-a7Bk)a8 However, a1~a
8 is because edge extraction with an arbitrary number of threads attempts to strengthen the outline of the image by extracting the edges and lines of the image and adding the amount of edges extracted with a specific relationship to the original image data. 6 In this embodiment, edges were extracted using a 5×5 convolution mask in the main scanning and sub-scanning directions. 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 eight-lid signal (hereinafter referred to as V, D, V signal) indicating a region where edges can be extracted using a Laplacian mask while the video φ is enabled. This means that when using a 5×5 Laplacian mask, V,
E, V, L after the third wood after the signal becomes active
, E, and @ indicate that the V, D, and V signals are output.

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 o u L = (ast (Y-as2))
a53Mout = (as4(M-ass
) l a56Co ut = (as7(C-
ass) ) ass However, a51-a59 are any number of threads.

Next, output gradation corrected density data, Y.

M, C, Bk and edge IED are input to the binarization unit 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.
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 image is then processed by the image processing circuit 33 as shown in the north.

Y, M, C, Bk for inkjet heads.

The video signal converted into four-color binary signals (hereinafter referred to as density data) is sent to the reader m-printer synchronous memory 34 on line 5.
It is input through 1.

(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
A signal from the printer register position sensor 16 is input through line 53 to 17, and after the BJ head unit 18 passes the registration position, the time delay until it reaches the copying position is counted by N, L, E signals. By doing this, 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,
) to the reader m-printer synchronization memory 34 via line 54.

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 density data input from the reader part with the speed of the printer, that is, N, L, When the V, D, and V signals are input from the image processing circuit 33, which outputs them in synchronization with the E and signal, only the effective part of the video data is processed.
, L, E, sequentially written in synchronization with -.N, E from the rad synchronization signal generation circuit 38.

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

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

In the printer synchronization circuit 35, helad data of the four colors Y, M, C, and Bk, which are color-separated images of one point of the original S', are inputted via the line 55 at the time of separation between the four colors. The position of each head is shifted 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, to position the Y head where the image is printed first in the main scanning forward direction M, C, Bk. This is achieved by accumulating the color data in the buffer memory in the printer synchronization circuit 35, sequentially outputting it from the printer 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, which is a signal indicating the copy area of the head of the NE multiplied signal Y, and a head drive enable signal corresponding to each color (hereinafter referred to as H, D, E) indicating the ejection section of the head of each color from this NE multiplied signal.

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.

E, signal, H, D, E, signal, outputs the drive signal for the inkjet head in the printer head unit 18 and the head data corresponding to each color from the clock 6 to the printer head unit 18 6 The image of the original is created by the flow described in 1. The image is read from the reader 3 and formed into an image by the printer 4. When the image controller detects the end of the V, E, and N, E signals generated from the reader 3 and printer 4, it determines the end of the main scanning in/out copying (step 14).
Proceed to step 15.

(Post-processing) In Stella 7'15, the sequence codon roller 23 first turns off the exposure lamp 19 and becomes a leader.

Each motor driver circuit 26a, 2 of the printer
Input a motor OFF signal to 6b, then send speed data in the forward direction and a rotation start signal to start ONL backward movement of each motor 6a and 6b, and stop at the respective main scanning home positions 11 and 12. At step 16, 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 copy @ rate in the rotation mode in the vertical direction before the sub-scanning, 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, the process proceeds to step 3, where a head recovery operation for cleaning the inkjet nozzle head after copying is completed is performed, the head is immediately capped in step 4, and the input of the next copying command is awaited in step 5. The above is an overview of the device operation.

(Film Projection System) The digital color image forming apparatus 1, 00 of this embodiment can be equipped with a projection exposure means for film projection. Exposure 1-1 is configured so that both negative and positive films can be read by the same reading sensor unit 17 and recorded by the same recording head unit 18 by this projection exposure means.

FIG. 9(&) is a perspective view when the projector is 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. No. 911b shows the connecting part between the rail 105 and the main body 100, and lO6 is the projection 41103.
This is a microswitch that emits a signal indicating that the device is installed. When the projector 103 is moved along the rail 105, the projection surface of the projector 103 is brought into close contact with the document 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 manner as in the reflection exposure described above.

, FIG. 10 shows the internal configuration of the projection R103,
The direct light emitted by the projection system illumination lamp 115 and the reflected light reflected by the reflection plate 114 are passed through the condenser lens 1.
16 and reaches the window of the film carrier 117. The frame carrier 11 has a window slightly larger than one frame of negative film and positive slide at the top and bottom, and is designed to load the film 18 or positive slide inside.

7. After the projection light reaching the window at the top of the r shim carrier 11 is projected onto the film 118 to obtain an image, the color is corrected through the window in the F section by the color correction filter 120 for negatives or the color correction filter 119 for carbon. be done. In general, color correction filters for negatives depend on the type of film, but since a filter with an orange base is usually used, a filter called an orange mask is used to remove this. In addition, in the case of positive film, the light f from the light source, lens, reading sensor, etc.
This is a filter used to correct the system. In the case of negatives, an orange mask and a positive filter may be used together.

Further, when the value is positive, there is no need to use a filter. The positive filter 119 and the negative filter 120 are connected to a fill drive motor 123 and a positive filter position sensor 121.
, the negative filter position sensor 122 allows the negative filter to be moved to either position as desired. In this embodiment, the filter position sensors 121 and 122 are photointerrupters that output a high level when light is blocked by a shutter. The image color-corrected by the filter is optically expanded by a magnifying lens 124 and first converted into a parallel light image by a Fresnel lens 125. After this, the main body 10
A re-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 mounting signal at a f level is output. In addition, image areas 1-128a and b are provided in the front, back, top, and bottom of the window in the F section, and the effective image area is automatically recognized, the black frame that appears in the invalid area is removed, and only the effect image is recorded. used to do.

That is, when a video signal is obtained by reading the image projected by the projector 103 and using the sensor unit (sensor unit) 17, the video signal will represent black in the area where the projected image does not come, that is, the invalid image processing area, and if output as is, the video signal will be black in the area other than the valid image area. prints black.

Therefore, in order to prevent this, image area start surin) 1
The projection light passing through 28a is detected, and this detection signal is taken as the start of the effective image area, and reading and recording of the projected image is started. Next, when the projection light passing through the image area end sleeve 128b is detected, this signal is used to mark the end of the effective image area, and the reading and recording of the projected image is completed. The upper and lower slits are provided to select an element that can provide an effective image of the reading sensor array consisting of one or more 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 FIG. 12, block II is an image control block and block I is a sequence control block. In Pro and Tsukue, 129 is a microcomputer that controls the system, 130, 13
1° 132 is a drive device for a reflection system illumination lamp, a projection system illumination lamp, and a color correction filter switching motor, respectively. Reference numeral 133 is a power source for an illumination lamp, and the voltage is controlled by a signal from a microcomputer 129, so that the amount of light from the lamp can be changed between negative and positive. (necessary, the lamp power supply voltage is higher for negative than for positive,
This is controlled by a 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 (2), 134 is an image control circuit that performs both-side processing of the video signal.

When performing shading correction, the grading 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 an aging signal is input from the microcomputer 129 to the image control circuit 134, the image control circuit 134 writes the address data and the write signal I to the RAM 137.

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 13B, 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 shading correction is not performed in either case. In this embodiment, as shown in FIG. 12, when the film installed in the projector is negative, O is entered in all the parts of the ROM 138 where the reference data is input. Therefore, if negative correction data is written to the address corresponding to O, shading correction for negative film will be performed, and if data for which the human video signal is output as is 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 invert the video signal in the case of a negative signal and rotate it in the forward direction 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 black extraction circuit 62. as explained 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 device. The operation will be explained below using FIG. 13. First, in step l, after turning on the power, it is checked whether the projector mounting switch 106 is on. If it is off, step 2
The process moves to a reflection system mode, enables the reflection system illumination lamp 110, prohibits the illumination lamp 115 of the projector 3, turns off the fan motor 126, and advances to step 6.

If the projector mounting switch 106 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, check whether the positive film mounting switch l27 is on or off.

(I) 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 to VC.

After this, the negative/positive conversion signal is turned on and the image control circuit 13
4, the shading correction circuit 13B performs positive correction, and the passing buffer 140a is enabled to pass the data. 0 Next, the light amount conversion signal is turned on and the lamp voltage is lowered than in the case of negative to produce a positive film. In preparation, move on to step 6.

(n) If switch 127 is off - Step 5
The camera moves to negative film loading mode. 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 60, 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 variable magnification are input from the operation panel, the area to be scanned to read or record the image is determined using this data, and the copy start key is input. wait. If there is no input, the process moves to step 1 to prepare for resetting by changing the mode, changing input data, etc. Start copying again.
If there is power, go to step 7, determine whether the currently set mode is shooting mode or reflection mode, and if it is projection mode, go to step 8 with 1 reflection mode. 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 image data dating, and then
Clear the counter that counts from 28 to the valid image area. 0 Next, turn on and off the image data gate to extract only the valid image area while making a judgment using the output BK multiplication signal of the black extraction circuit 62 shown in FIG. 12 in step 13. 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 the longitudinal direction of 128ab and f
It is a line. SBK in FIG. 15 has a black signal level higher than that of the black signal level.

Immediately after starting the maposcan, 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 sampled image data is black, the image data start circuit 144 is turned off to prevent the data from going to the printer. Next, when the reading sensor 17 enters the area B, the image data shows white due to the direct light from the slit. If this is determined, the image data counter is incremented, and after counting up the number of image data corresponding to the distance from the slit 128 force to the effective image area, it is assumed that the reading sensor 17 has entered the area C and the image data is The data gate circuit 144 is turned on to start transmitting image data to the next stage. Here, in step 13, the gate is turned off until the image data becomes white, and when the image data becomes white, the process moves to step 14. SWIP 1
In steps 4 to 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. That is, if the image data changes from black to white and the counter counts up, that point becomes the valid image area, and if data indicating something other than white comes before the counter counts up, it is determined to be a disturbance and the process goes to step 12. Make it go back. 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 next stage and performing the necessary image processing, the process returns to step 10 in FIG. 13 and the processed data is recorded. Print on paper.

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

Effect> As described above, since the present invention changes the light amount of the exposure lamp depending on whether the film is negative or positive, it is possible to compensate for changes in the image signal level due to differences in film, and both films can produce high gradations. An image signal can be obtained.

In this embodiment, negative and positive discrimination is automatically performed, but selection may also be made by manual input.

[Brief explanation of the drawing]

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,
WE, Figure 6-a is a diagram showing the relationship between the reader's document and the reading synchronization signal, Figure 6-b is an enlarged view of part A in Figure 6-a,
Fig. 6-a is an explanatory diagram of the positional deviation of the read COD of each color, Fig. 6-d is a diagram showing the relationship between copy paper and the recording cycle signal,
Figure 6-e is an enlarged view of part B in Figure 6-d, Figure 6-f is an explanatory diagram of the positional deviation of the inkjet heads of each color, and Figure 6-e is an enlarged view of part B in Figure 6-d.
Figure 7-b is a diagram showing the frequency division timing according to the magnification of the encoder pulse of the reader main scanning motor, Figure 7-b is a diagram showing the reading pixel interval in the main scanning direction according to the magnification,
-C diagram is an explanatory diagram of interpolation and thinning operations according to the magnification ratio. 7-d is a detailed circuit diagram of the scaling buffer memory 31 of FIG. 3, FIG. 7-e is a detailed circuit diagram of the video data synchronization signal generation circuit 28 of FIG. 3, and FIG. 7-f is a detailed circuit diagram of the video data synchronization signal generation circuit 28 of FIG. Signal timing chart diagram. Figure 8-a is a detailed circuit diagram of the image processing circuit 33, Figure 8-b
9(a) is a perspective view of the projector 103 and the main body 100, and FIG. 9(b) is a diagram showing the input/output relationship of the edge extraction circuit 63 in FIG. 8-a. Part cutaway view, 1st
FIG. 0 is a diagram showing the internal structure of the projector 103, and FIG. 11 is a film carrier diagram illustrating the effective image area. Fig. 6-C1 Fig. 6 b Kasumi Chita Isu Y Po Leap

Claims (1)

[Claims] An image reading device comprising a reading means for reading an image and obtaining an image signal, a projection means having a lamp for exposing the film image, and a light amount switching means for switching the light amount of the lamp depending on whether the film is negative or positive.