JPH0628371B2 - Image reader - Google Patents

Description

TECHNICAL FIELD The present invention relates to an image reading device, and more particularly to an image reading device that reads an image from a film.

<Prior Art> When a film image is read by a conventional film projection system, a black frame portion is outside the effective area of the projected image, and an unnecessary black frame is read as it is. If the reading area is narrowed to avoid this, even a part of the effective image cannot be read.

<Objective> An object of the present invention is to provide an image reading apparatus capable of removing the above-mentioned drawbacks and removing an unnecessary image such as a black frame to read the image.

<Embodiment> (Outline 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. The configuration of the present invention will be described with reference to FIGS. 1 and 2. The document table glass 1 has a document 20 placed on a flat surface. The original surface of the original 20 faces the surface of the original glass 1, and the original 20 is pressed by the pressure plate 1a. The reading head (hereinafter referred to as a reader) 3 for reading the original 20 is three for red, green, and blue (hereinafter referred to as R, G, and B) colors.
A reading sensor (hereinafter referred to as a CCD unit) 17 composed of a CCD array composed of a plurality of reading elements in each column and an exposure lamp 19 are mounted, and the main scanning wire 8a is connected to the main scanning motor 6a and driven. 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.

The recording paper 21 is placed on the recording base 2 and a copied image is recorded by a recording head (hereinafter, printer) 4. Pudding 4 is yellow, magenta, cyan, black (hereinafter Y, M,
C, BK) A recording element (hereinafter BJ head unit) composed of a multi-ink jet head for four colors (the bubble jet head is used in the present invention, henceforth BJ head).
Is mounted, and the main scanning motor 6 is driven by the main scanning wire 8b.
It is coupled to b and driven. The sub-scanning table 5b supports one end of the main scanning wire 8b and is driven by being coupled to the sub-scanning motor 9b by the sub-scanning wire 10b.

In the above-mentioned structure, when trying to obtain a copied image, the reader 3 moves the main scanning motor 6a through the main scanning wire 8a.
And is reciprocated 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 electric signal. Based on this electric 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 directions of the reading head 3 and the recording head 4 are set opposite to each other in this embodiment. After one copy process in the main scanning direction is completed and the exposure lamp 19 is turned off, the reader 3
The printer 4 moves in the direction perpendicular to the main scanning, that is, in the sub-scanning direction to the position where the next main scanning is performed. At this time, the reader 3 has the sub-scanning base 5a supporting the main scanning wire 8a.
Along with the sub-scanning wire 10a, the sub-scanning motor 9
It is driven by a and moves to a predetermined position and stops. Further, the printer 4 is driven by the sub-scanning motor 9b via the sub-scanning wire 10b together with the sub-scanning table 5b supporting the main scanning wire 8b to move to a predetermined position and stop.

(Device control operation ... Pre-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 flow chart. 4 and 5,
First, the outline of the operation of the apparatus will be described with reference to FIG. The timing chart and step number on the flow chart.
Are the same.

Sequence controller 23, image controller 2
Both 4 have a micro computer unit in the center,
The sequence control of the apparatus and the timing of image data formation are programmed respectively, and both microcomputers communicate data via line 39.
The sequence after the power is turned on will be described. The sequence controller 23 initializes the copying machine in step 1 according to the flow chart of FIG.
Return home position of main scan and sub scan of reader and printer. Next, in step 3, the ink jet head is returned. The head recovery operation is performed by using a porous member or the like in order to forcibly remove the sticking of the ink at the tip of the ink jet nozzle after the apparatus has been idle for a long time, and further to remove the liquid pool near the nozzle tip after the ink ejection operation. This is an operation performed by pressing a material having good water absorbability against the tip of the head or sliding it in contact. In 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 for pressing the porous member against the head is turned on and pressed against the nozzle tip for a predetermined 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 for the purpose of preventing a change in the viscosity of the ink at the nozzle tip at the time of the suspension of the copying operation of the apparatus. This is achieved by turning on a drive mechanism such as a solenoid for capping at the home position of the printer. Next, in step 5, the operator's input from the operation unit 25 is waited for, the input data is decoded, the copy mode is set, and in step 6, it is judged whether or not it is a copy start command. When the process returns to step 5 and the copy is started, the process proceeds to step 7 and the head cap drive is released to start the copy operation. Next, in step 8, the head head is ejected before the copying operation. The idle discharge process is a process that is performed to ensure stable recording. Copy pause is performed to prevent uneven discharge at the start of image formation due to changes in the viscosity of the ink remaining in the ink jet nozzles. This is an operation for ejecting and removing the ink in the ink jet nozzle according to programmed conditions such as time, apparatus temperature (temperature sensor not shown), and copying duration. Next, in step 9, the document exposure lamp 19 is turned on and the shading correction process is performed. The shading correction is to read the standard white plate which is the reference of the white data before scanning the original, and sample the correction data of the aberration of the optical system lens and the sensitivity variation of each bit of the CCD sensor.

Next, at step 10, it is judged whether or not it is immediately after the start of copying, and immediately after the start, that is, before the start of the first main scanning, the process proceeds to step 11, and if it is the second or later time, the process proceeds to step 12. In step 11, a head recovery operation is performed in anticipation of a long rest of the apparatus. The recovery operation in this case is the same as the operation described in step 3. Next, at step 12, main scanning is started. (Note that each signal is shown in FIG. 6) (Device control operation-copy) In the main scanning, first, the motor driver circuit 26a of the reader via the line 40 is supplied with speed data according to the magnification and rotation start signal in the reader forward direction. To turn on the reader main scanning motor 6a. Next, after taking the delay time for synchronizing the reader and printer according to the scaling ratio,
A rotation start signal in the printer forward direction is sent to the motor driver circuit 26b of the printer via the switch to turn on the printer main scanning motor 6b. Regarding the rotational speeds of the main scanning motors 6a and 6b of the reader and printer, the pulses (FG signals) from the rotational speed detecting rotary encoders 7a and 7b (hereinafter referred to as encoders) are motor driver circuits 26a and 26b, respectively.
Is compared with the rotation speed reference pulse and locked to a predetermined rotation speed by the PLL control to become a constant speed rotation speed. Each encoder pulse is sent to the video data synchronizing signal generating circuit 28 and the head data synchronizing signal generating circuit 38 via the lines 42 and 43.

(Processing by Reader) Next, in step 13, a copying operation is performed. Hereinafter, description will be made with reference to FIGS. 7-e and 7-b. As shown in FIG. 3, the video data synchronizing signal generation circuit 28 is position information in the reader main scanning direction in synchronization with the encoder pulse of the reader main scanning motor 6a, and indicates the effective range of the video data having the resolution in the sub scanning direction. A video line enable signal (hereinafter VLE) is produced as shown in Figures 6-a and 6-b. Furthermore, the video data start signal input from the CCD drive circuit 29 indicates the data effective width of all pixels of the CCD and outputs a video data enable signal (VDE) synchronized with the encoder pulse. At the same time, the CCD start signal for instructing the CCD driving circuit 29 to read the image on the CCD corresponding to the three colors of blue (B), green (G) and let (R) on the CCD unit 17 is synchronized with the encoder pulse. And supply through line 57. 3 read in CCD unit 17
The analog video signals for the respective colors are gain-adjusted so that the sensor sensitivities of the respective colors are equal, and then output as digital values having a depth of 8 bits through the line 44. At this time, a video data start signal indicating the effective data range of all CCD pixels is also output from the CCD drive circuit 29. Digital video data of B, G, and R colors (hereinafter referred to as video data) is input to the reader synchronization circuit 30.

The video synchronizing signal generating circuit 58 will be described below. To the video synchronizing signal generating circuit 28, the signal PHREGP line 45 from the leader registration position sensor 15 is sent.
V. L. E. V. signals are counted from line 46 and image controller 24 according to the copy magnification. L.
E. The signal values are respectively input through the line 47, and the reader registration position for image registration is CC-registered.
The time delay from the passage of the D unit to the arrival of the leading edge of the original, that is, the reading start position is V. L. E. This is done by counting the signals. Further, a signal video enable signal (hereinafter referred to as VE signal) indicating the reading width in the main scanning direction according to the copy size is output and input to the reader synchronization circuit 30 via the line 48.

In the reader synchronization circuit 30, as shown in FIG.
When the same portion of the original document of the CCD corresponding to each of G and R colors is read, the alignment operation in the main scanning direction is performed. That is, assuming that the intervals of the CCDs corresponding to B, G, and R colors are L1, respectively, the image at the position S1 of the document is input to the CCD corresponding to each color when the main scanning speed is V and the time is L1 / V, respectively. I have a gap. Therefore, until the image of point S1 is input to the CCD of R that is input after the time, the C of B and G is input.
The video data from the CD is temporarily stored in the buffer memory in the reader synchronization circuit 30 respectively, and the B, G, and
The R3 color video data is collected and output from the reader synchronization circuit 30. In addition, V. E. A video data area (V.G.V.) showing a state in which B, G, and R three-color video data are complete after a signal is input, that is, original video data is input.
D. A) Output a signal. The vertical direction in FIG. 6-c is the time axis, not the sub-scanning direction.

The video data color-matched by the reader synchronization circuit is then input to the scaling buffer memory 31 and scaled.

(Scaling Process) Here, the scaling process will be described with reference to FIG. The scaling processing in the main scanning direction is performed by changing the scanning speed V1 of the printer to V1 / n while keeping the scanning speed V1 of the printer constant (n is a scaling ratio). This is because the upper limit of the drive frequency of the ink jet head, which is the image forming means of the printer, is lower than the upper limit of the drive frequency of the CCD. Therefore, in order to increase the copying speed at the same size copying, the maximum ink jet driving frequency is used at the same size copying. At this time, line 4 in FIG. 3
9, a scaling mode signal is sent from the image controller 24 to the video data synchronizing signal generating circuit 28, and the V.V.
L. E. The frequency division ratio of the motor encoder pulse of the reader is set so that the signal has a common frequency at the time of equal magnification and at the time of magnification change (Figs. 7-a and 7-b).

That is, as shown in FIG. 7-a, the motor encoder pulse M
Is equal to 1/6, and divided by 1/6 as shown in M1.
When it is doubled, it is divided into 1/12 as shown in M1 / 2, when it is doubled, it is divided into 1/3 as shown in M2, and when it is tripled, it is divided into 1/2. Go around. The motor encode pulse M is 2 when the frequency thereof is 1/2 times as large as the normal size.
The frequency of M1, M2, M3, and M1 / 2 is actually the same frequency because it is 1/2 when doubled and 1/3 when tripled.

FIG. 7-b shows the reading position on the original, and shows the moving distance of the CCD during a fixed time t (= V.LE section). When it is reduced to 1/2, the moving distance is twice as large as the normal size, and when it is doubled, it is 1/2 as large as the normal size.
Moving.

The scaling processing in the sub-scanning direction is performed by the video clock (CL
R8 transmitted from the reader synchronization circuit 30 in synchronization with K8). G. This is done by controlling the address step of the variable scale buffer memory 31 when each pixel of the B video signal is stored in the variable scale buffer memory 31 (FIG. 7-c).

This is achieved by increasing or decreasing the number of clock pulses of the address counter when the scaling mode signal is input from the image controller 24 to the memory control circuit 32 through the line 50 and written in the scaling buffer memory 31 according to the scaling ratio ( (Fig. 7-d). As a result, the data of the same pixel is written to n addresses in the memory 59b in the write mode (W) of the double buffer memories 59a and 59b in the variable magnification buffer memory 31 at the time of n times expansion.
When / n is reduced, one pixel out of n pixels is written at one address, and when the read mode is entered, the pixel data is interpolated when the address is advanced by the video clock CLK8. Thinning out will be achieved. Although the motor speed on the reading side is changed in this embodiment, the motor speed on the recording side may be changed.

Here, another function of the scaling buffer memory 31 will be described with reference to FIG. 7-d. Magnification buffer memory 3
The double buffer memories 59a and 59b in 1 switch the address step clock at the time of writing and at the time of reading. L. E. Since the signal is generated from the encoder pulse of the reader main scanning motor 6a, when the rotation unevenness of the motor occurs, the accuracy as position information between the main scannings in the entire sub-scanning is obtained, but the frequency becomes uneven.
V. L. E. In order to synchronize with the signal and not to change the accumulation time of the CCD, the image reading cycle by the CCD is set to V. L. E. Since the shift clock -CLK4 of the CCD 17 has a frequency more than twice that of the video clock, -CLK8, it is set to 1/2 or less of the minimum value of the signal period. The address clock uses the shift clock CLK4 of the CCD 17, and at the time of reading, the video clock CLK8 which is a synchronizing signal of pixel data in the reader and printer is used.

As described above, the scaling buffer memory 31 and the memory control circuit 32 interpolate pixel data in the sub-scanning direction in the scaling mode.
In addition to the thinning-out operation, the CCD reading time is fixed and the pixel reading operation is performed in synchronization with the encoder pulse of the reader main scanning motor 6a.

(Image Signal Processing) The B, G, and R three-color video data that has been subjected to the above-described scaling processing in the scaling buffer memory 31 is next processed by the image processing circuit 3.
3 and the processing shown in the block of FIG. 8 is performed. First, the video data of R, G, and B colors are corrected by the shading correction unit 60 based on the data of the standard white plate read in step 9. In this embodiment, CC
Since the image light is read within the range in which the D exposure amount E and the light output voltage V maintain the linearity, the correction of the following equation is added.

However, Vs: output after shading correction V: output from CCD Vmax: output when reading a white plate Vsmax: set output The video data to which the shading correction has been added is input to the next logarithmic conversion unit 61 from the light amount value. At the same time as conversion to ink density values, complementary color conversion is performed, and B, G, and R video data are converted to y, m, and c density data, respectively. The conversion equation is expressed by the following equation, where D is the ink density, Ep is the reflected light amount of the standard white plate, and E is the image light amount.

The three-color density data after conversion is next subjected to the black extraction / UCR unit 62.
And are input to the edge extraction unit 63. What is black extraction?
That is, the amount of black ink hit is calculated from the density data of three colors M and C. This is because if you try to express black (hereinafter Bk) with Y, M, and C color inks, it will be difficult to express perfect black, and the amount of ink ejected will increase, causing "bleeding" and excess paper on the copy paper. This is to prevent the expansion of. Further, UCR (removal of undercolor) is a method of reducing the ink amount of each color of Y, M, and C in relation to the black ink amount when black ink is used by black extraction.

_{Bk = {min (Y, M} , C) -a 1} a 2 Yout = (Y-a 3 Bk) a 4 Mout = (M-a 5 Bk) a 6 Cour = (C-a 7 Bk) a 8 However, a _{1 to} a ₈ are arbitrary coefficients. Edge extraction enhances the contour of the image by adding the edge amount and the edge amount of the image extracted to the original image data with a specific relationship. This is to try. In this embodiment, edges are extracted by 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, a threshold value is selected so that the low-level detection value is not added to the image data. The edge extraction section outputs a video data valid signal (hereinafter referred to as a V.D.V. signal) indicating a region where the edge can be extracted by the Laplacian mask in the video enabled state. This means that when using a 5 × 5 Laplacian mask, V.
E. After the signal becomes active, the third V.
L. E. Signal to V. D. V. Indicates that a signal is output.

Concentration data after UCR Y. M. C is input to the masking section 64 and masked. For masking, the following calculation is performed by a matrix calculation process for correcting turbidity when ink is superposed due to unnecessary absorption of ink.

However, a ₁₁ ~a ₃₃ is the number of any system.

Next, the masked Y, M, C three colors and the Bk density data are input to the output gradation correction circuit 65, and the data of the latter 2
Correction can be added to make the gradation flat when the pseudo halftone is expressed by the dither method used in the digitizing circuit. The correction formula is shown below.

Yout = {a ₅₁ (Y−a ₅₂ )} a ₅₃ Mout = {a ₅₄ (M−a ₅₅ )} a ₅₆ Cout = {a ₅₇ (C−a ₅₈ )} a ₅₉ where a _{51 to} a ₅₉ are optional Is the coefficient of.

Next, output tone-corrected density data, Y, M, C, B
The k and the edge amount ED are input to the binarizing unit 66 and binarized.

In the binarization process, in this embodiment, the systematic dither method is used to first binarize the image data uniformly, and then the pixel of interest is corrected by the edge data ED. In other words,
When correction is performed based on the truth table shown in FIG. 6B, the image in which blurring has occurred in the edge portion due to the systematic dither method becomes a pseudo halftone expression image in which the contour is strengthened.

As described above, the video signal processed by the image processing circuit 33 and converted into Y, M, C, Bk and four color binary signals (hereinafter, density data) for ink jet head is read by the reader
Input to the printer synchronization memory 34 via line 51.

(Processing on Printer Side) Here, the head data synchronizing signal generating circuit 37 will be described before the operation of the reader / printer synchronizing memory 34 is described. In the head data synchronization signal generation circuit 37, the sixth
-D, 6-e as shown in the printer main scanning motor 6
In synchronization with the encoder pulse of b, a nozzle line enable signal (hereinafter referred to as NLE), which is position information in the main scanning direction of the reader and indicates the effective range of head data of resolution in the sub scanning direction, is generated. N. L. E. The signal is sent via line 52 to the head sync signal generation circuit 38.
A signal from the printer register position sensor 16 is input to the head synchronizing signal generating circuit 38 through a line 53, and the time delay until the copy position is reached after the BJ head unit 18 passes through the registration position by N.V. L.
E. A signal indicating the copy width in the main scanning direction according to the copy paper size, that is, a nozzle enable signal (hereinafter NE) for each color is output to the reader / printer synchronous memory 34 via the line 54 by counting the signals. To do.

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 unit with the speed of the printer. L. E. Output in synchronization with the signal. From the image processing circuit 33 to the V. D. V. When a signal is input, that is, only the effective part of the video data is V. L. E. The data is sequentially written in synchronization with the head sync signal generation circuit 38. E. When a signal is input, that is, when the copy area has an ink jet head, the density data written in the memory is used as head data. L.
E. Are sequentially read out in synchronization with. The data of each recording head read from the reader / printer synchronization memory 34 is output to the printer synchronization circuit 35 through the line 55.

In the printer synchronizing circuit 35, head data of four colors Y, M, C and Bk obtained by color-separating the image of the original S'point is input simultaneously through the line 55, but the head data of those four colors is input. Positioning processing is performed by the distance in the main scanning direction between the heads corresponding to the respective colors.

That the 6-f as shown in Figure Y, M, C, × document when Bk spacing of each color corresponding ink jet head and L ₂
In order that the images of the Y, M, C, and Bk inks at the points are overlapped and struck at the same point in the main scanning direction of the ink jet head, the speed of the main scanning is set to V and L ₂ / V is applied to the heads of each color.
You can hit it with a time delay. In other words, the printer head synchronizing circuit 35 outputs the M, C, and Bk color head data up to the Y head position where the image is first printed in the forward direction of the main scan.
This is achieved by temporarily storing the data in the buffer memory therein and then sequentially outputting it from the printer synchronization circuit 35 and inputting it to the printer head drive circuit 36. The vertical direction in FIG. 6-f is the time axis, not the sub-scanning direction.

In addition, the printer synchronization circuit 35 has an N.S. E. The signal is input, and the NE signal is a signal indicating the copy area of the Y head.
From this NE signal, a head drive enable signal (hereinafter referred to as H.D.E.
Signal) and input to the printer head drive circuit 36 through the line 56. In the printer head drive circuit 36, N. E. Signal, N.N. L. E. Signal, H. D. E. A signal, a clock, an ink jet drive signal in the printer head unit 18, and head data corresponding to each color are output to the printer head unit 18.

The image of the original is read by the reader 3 according to the above flow and is formed by the printer 4. The image controller is a V. 3 generated by the reader 3 and the printer 4. E. Signal and N.P. E. When the end of the signal is detected, the end of one-line copying in the main scanning is judged (step 14) and the process moves to step 15.

(Post-Processing) In step 15, the sequence controller 23 first turns off the exposure lamp 19 and turns off the motor to the respective motor driver circuits 26a and 26b of the reader and printer.
Signal is input, and then the speed data in the reverse direction and the rotation start signal are sent to turn on the respective motors 6a and 6b.
Then, the reverse movement is started, and each main scanning home position 1
Stop at 1,12. At the same time, in step 16, the reader sub-scanning stepping motor 9a (hereinafter referred to as the leader sub-scanning motor) is fed a predetermined number of pulses in accordance with the copy magnification in the sub-scanning forward direction rotation mode to feed the reader for one sub-scanning. Similarly, the printer sub-scan stepping motor 9b (hereinafter referred to as printer sub-scan motor) also feeds one sub-scan. Next, in step 17, the sub-scanning counter is incremented, and in step 18, it is judged whether or not the sub-scanning counter is advanced by the copy width in the sub-scanning direction. If the count is not advanced, the process is returned to step 8 and main scanning is performed. Is repeated until the sub-scanning counter is up.
When the sub-scanning counter is up, the process proceeds to step 2, where a predetermined pulse number is sent to each sub-scanning motor of the reader / printer in the sub-scanning reverse rotation mode to restore the home position. Then, in step 3, the head recovery operation of cleaning the ink jet nozzle head after the copying is completed is performed, and in step 4, the head is capped and the next copy command is waited in step 5. The above is the outline of the operation of the apparatus.

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

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

103 is a projector for projecting a negative or positive film, and 104 is an arm for supporting the projector 103.
5 is a level for moving the projector 103 up and down. FIG. 9b shows a connecting portion between the rail 105 and the main body 100, and 106 is a micro switch for issuing a signal indicating that the projector 103 is mounted on the main body 100. When the projector 103 is moved along the rail 105, the projection surface of the projector 103 is brought into close contact with the platen glass 1.

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

FIG. 10 shows the internal structure of the projector 103. Direct light emitted by the projection system illumination lamp 115 and reflected light reflected by the reflector 114 are condensing lens 11
It is condensed by 6 and reaches the window of the film carrier 117. The film carrier 117 includes a negative film and a negative film.
It has a window slightly larger than one frame of the positive slide, and the film 18 or the positive slide can be mounted inside.

The projection light reaching the upper window of the film carrier 117 projects the film 118 to obtain an image, and then the negative color correction filter 120 or the positive color correction filter 1 is output from the lower window.
Color correction is performed by 19. Generally, a color correction filter depends on the type of film in the case of a negative, but since an orange base is usually used, a filter called an orange mask is used to remove this. In the case of a positive film, it is a filter used to correct the optical system such as the light source, the lens, the reading sensor and the like. In the case of a negative, an orange mask and a positive filter may be used together. Further, when positive, the filter may not be used. The positive filter 119 and the negative filter 120 are a filter drive motor 123 and a positive filter position sensor 1.
21, by the negative filter position sensor 122,
You can move it to either position. The filter position sensors 121 and 122 are photo interrupters in this embodiment, and output a high level when light is shielded by the shutter. The image color-corrected by the filter is optically magnified by the magnifying lens 124, and then converted into a parallel light image by the Fresnel lens 125. After this, a video signal can be obtained from the reading unit 17 inside the main body 100. FIG. 11 shows the film carrier 117.
As shown in the figure, the inside of the carrier has a width of a negative film from one end to the other, and a groove in the size of a slide frame near the lower window in the center is provided. 127 allows automatic switching between positive and negative. In general, a negative film is used in a state of a film that continues for several frames, and a positive slide is used by separating it frame by frame and attaching a fixed slide frame made of cardboard or the like. Therefore, in FIG. 11, when the negative film is mounted, the mounting switch 127 is not pressed and the output signal is low level. When the positive film is mounted, the mounting switch 127 is pressed and a high level mounting signal is output. To be done. Also, image area slits 128a and 128b are provided on the front, rear, upper and lower sides of the lower window,
It is used to automatically recognize the effective image area, remove the black frame appearing in the invalid area, and record only the effective image. That is, the image projected by the projector 103 is read by the sensor unit 1
When the video signal is obtained by 7, the video signal represents black in the portion where the projected image does not come, that is, the invalid image processing area, and when it is output as it is, black is printed in the area other than the effective image area. Therefore, in order to prevent this, the projection light that has passed through the image area start slit 128a is detected, the effective image area is started by this detection signal, and the reading and recording of the projected image are started. Next, when the projection light passing through the image area end slit 128b is detected, this signal is used as the end of the effective image area, and the reading and recording of the projection image are ended. The upper and lower slits are provided to select the element that gives an effective image of the reading sensor array with a plurality of elements.
These four slits make it possible to accurately record only the effective image.

FIG. 12 is a block diagram of the sequence control device and the image control device in the main body 100. Block in the figure
II is an image control block and block I is a sequence control block. In block I, 129 is a microcomputer for controlling the system, 130, 131,
Reference numeral 132 is a drive device for a reflection system illumination lamp, a projection system illumination lamp, and a color correction filter switching motor.
Further, 133 is an illumination lamp power source, which can control the voltage by a signal from the microcomputer 129 to change the lamp light amount between negative and positive. In the case of the present embodiment, a larger amount of light is required in the case of the negative than in the case of the positive, so the lamp power supply voltage for the negative is higher than that for the positive, and this is controlled by the lamp light amount conversion signal. In this case, the lamp light amount conversion signal is set to high level for positive and low level for negative. In block II, 134 is an image control circuit that performs image processing of the video signal.

When performing the shading correction, the shading correction circuit 60 stores a RAM 137 for storing the data obtained by reading the standard white board, and a table ROM 1 for performing the shading correction conversion of the video signal based on the read data of the standard white board.
38. When a shielding signal is input from the microcomputer 129 to the image control circuit 134, the image control circuit 134 sequentially stores the reference data obtained by reading the standard white board data in response to the address data and the write signal ▲ ▼. Reference data and a video signal of the input image are input to the address input of the ROM 138, and the video signal after the shading correction is output from the output data line. At this time, the light quantity of the projector illumination lamp and the color correction filter change, and the optical characteristics change in the case of negative and positive.Therefore, the reference data is switched by the negative / hosi conversion signal, and the shading correction is changed between negative and positive. Or, in either case, the shading correction is not performed. In this embodiment, as shown in FIG. 12, when the film mounted on the projector is negative, 0 is entered in the portion of the ROM 138 where the reference data is input. Therefore, if the correction data for the negative is written in the address corresponding to 0, the shading correction for the negative film is not performed, and if the data for which the input video signal is output as it is is written, the shading correction is not performed. In the present embodiment, the logarithmic conversion circuit 61 performs the correction of the input system gradation by using the table ROM as in the case of the shading correction, and changes the correction by the negative / positive conversion signal.

Reference numerals 140a and 140b respectively denote a passing buffer and an inversion buffer, which inverts the video signal by a negative / positive conversion signal in the case of a negative and rotates it in the case of a positive so as to obtain a normal image. The normal or inverted signal is input to the black extraction circuit 62 and the edge extraction circuit 63 described in FIG. 8-a. Finally, a binarized signal is obtained, input to the gate circuit 144, and sent to the printer side.

FIG. 13 is a flow chart of the sequence of this apparatus. The operation will be described below with reference to FIG. First, at step 1, after the power is turned on, it is checked whether the projector mounting switch 106 is on. If it is off, the process moves to step 2 to enter the reflection system mode, and the reflection system illumination lamp 110
Enable, turn off the illumination lamp 115 of the projector 3,
The fan motor 126 is turned off, and the process proceeds to step 6.

If the projector mounting switch 106 is off, the process moves to step 3 to enter the 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, the positive film mounting switch 127 is turned on.
Check off.

(I) When the switch 127 is on: Move to step 4 and enter the positive film mounting mode. After that, the signal from the positive color correction filter position sensor 121 is checked to check whether the positive color correction filter 119 is installed. If not, the filter drive motor drive signal is turned on to drive the filter. The motor 123 is driven to mount the positive filter 119. After that, the negative / positive conversion signal is turned on and input to the image control circuit 134 so that the correction for positive is performed by the shading correction circuit 136, and the passing buffer 140 is also used.
Enable a to pass data. Then, the light quantity conversion signal is turned on to lower the lamp voltage as compared with the case of a negative film to prepare for the positive film, and the process proceeds to step 6.

(II) When the switch 127 is off: Move to step 5 and enter the negative film mounting mode. After that, the signal from the color correction filter position sensor 122 for negative is checked, and if not mounted, the drive motor 12
Drive 3 to check the installation. After that, the negative / positive signal is turned off and the shading correction circuit 60 cuts the shading correction, or the correction data different from the negative is selected, and the inversion buffer is enabled to output the output video of the logarithmic conversion circuit 61 for the input gradation correction. Invert the signal and send it to the next stage. After that, the light quantity conversion signal is set to low to increase the light quantity of the lamp and the process proceeds to step 6 to prepare for the negative film.

In step 6, data such as the size of the recording paper and the scaling factor are input from the operation panel, and the data is used to determine the scanning area for reading or recording an image, and the copy start key is input. wait. If there is no input, the process moves to step 1 to prepare for resetting due to mode change, input data change, etc. If there is a copy start key input, the process moves to step 7 to determine whether the currently set mode is the photographing system mode or the reflection system mode. If the mode is the projection system mode, go to step 8 and select the reflection system mode. If so, move to Step 9. The case of the reflection system mode has already been described.

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 lamp light amount becomes constant, main scanning of the reader is started. At this time, first, the image data gate signal is turned off to disable the image data gate, and the slit 1
The counter for counting from 28 to the effective image area is cleared. Next, the output BK signal of the black extraction circuit 62 shown in FIG. 12 is discriminated at step 13 and the image data gate is turned on / off to extract only the effective image area and send it to the next stage. This determination will be described with reference to FIG. Incidentally, CC
The arrangement direction of the D elements is parallel to the longitudinal direction of the slit 128ab. FIG. 15 SBK shows the black signal level.

Immediately after starting scanning, the image data in the area A in FIG. 15, that is, the invalid image area is sampled. In the area A, light does not come in, so the BK signal is black. When the sampled image data is black, the image data gate circuit 144 is turned off so that the data does not go to the printer side. 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 when the count up, that is, the number of image data corresponding to the distance from the slit 128 to the effective image area is finished, the reading sensor 17 is determined to have entered the area C. The circuit 144 is turned on to start image data transmission 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 proceeds to step 14. Switch 14 ~
At 16, it is determined that the sampled image data is white, and at the same time, a counter is used to perform a plurality of readings in the area B to take measures against disturbance such as noise. That is, if the image data changes from black to white and the counter counts up, that point is set as an effective image area, and if there is data other than white before the counter counts up, it is judged as a disturbance and it is judged in step 12. I will return. In step 17, it is judged that the reading sensor 17 has entered the effective image area C, the data is sent to the next stage and the necessary image processing is carried out, and then step 10 in FIG.
Then, the processed data is printed on the recording paper.
When copying of one main scanning line is completed, the process returns to step 7, the above-described processing is performed for the next main scanning, and reading is performed one after another. When the number of sub-scanning reaches a number that covers the effective image area, copying is completed. The process moves to 1 to prepare for the next copying operation.

<Explanation of Effect> As described above, according to the present invention, when a projection image of a film is copied by using the projection device, the projection device and the reading means are aligned with each other without undue precision. It is possible to make a copy by removing unnecessary unwanted shadows outside the effective image area.

[Brief description of drawings]

FIG. 1 is a perspective view of the apparatus of the embodiment of the present invention, FIG. 2 is a schematic perspective view of the apparatus of the embodiment of the present invention, FIG. 3 is a block diagram of a control circuit of the embodiment of the present invention, and FIG. Timing chart, Figure 5 is a sequence flow chart,
FIG. 6-a is a diagram showing the relationship between the original document of the reader and the reading synchronization signal, FIG. 6-b is an enlarged view of the portion A of FIG. 6-a, and FIG. 6-c is an explanation accompanying the displacement of each color reading CCD. Fig. 6-d shows the relationship between the copy paper and the recording synchronization signal, Fig. 6-e shows an enlarged view of the B part of Fig. 6-d, and Fig. 6-f shows the displacement of the ink jet head of each color. FIG. 7-a is a diagram showing the frequency division timing according to the scaling factor of the encoder pulse of the reader main scanning motor, and FIG. 7-b shows the reading pixel interval in the main scanning direction according to the scaling factor. FIG. 7-c is an explanatory diagram of interpolation and thinning-out operation according to the scaling ratio, FIG. 7-d is a detailed circuit diagram of the scaling buffer memory 31 of FIG. 3, and 7-e.
FIG. 7 is a detailed circuit diagram of the video data synchronizing signal generating circuit 28, FIG. 7-f is a timing chart of the video data synchronizing signal, and FIG. 8-a is a detailed circuit diagram of the image processing circuit 33. 8B is a diagram showing the input / output relationship of the edge extraction circuit 63 of FIG. 8-A, FIG. 9A is a perspective view of the projector 103 and the main body 100, and FIG. 9B is a diagram of the projector 103. FIG. 10 is a partially broken view, FIG. 10 is a configuration diagram of the inside of the projector 103, FIG. 11 is a perspective view of the film carrier 117, FIG. 12 is a control block diagram, and FIGS. 13 and 14 are control flow chart diagrams.
FIG. 15 is an explanatory diagram of the effective image area.

Claims (1)

[Claims] 1. A reading means for scanning an image, a projecting means for the film, and a supporting member for mounting the film on the projecting means, a slit is provided on the supporting member, and the reading means is provided during the image scanning. An image reading device characterized by detecting a slit passing position from an image signal and determining an image reading range based on the slit position.