JPH0222993A - Photographic film player - Google Patents

Abstract

PURPOSE:To heighten resolution with simple constitution by applying several times of exposure by green light and white light on a CCD having the color filters of Ye and Cr by rocking a transparent rocking plate, and generating a picture signal from the signals of Ye and Cr before and after rocking. CONSTITUTION:The transparent rocking plate 11 is arranged in such a way that it can be rocked around the axis in a vertical direction of the CCD 12. When the rocking plate 11 is fixed on one side and the exposure of the green light and the white light are performed, the output of the CCD 12 at the time of receiving the green light is stored first, and next, the output of the CCD 12 at the time of receiving the white light is stored as the yellow(Ye) and the cyan(Cy). After that, when the rocking plate 11 is fixed on the other side and the exposure of the green light and the white light are performed, the output of the CCD 12 at the time of receiving the green light is stored first, and next, the output of the CCD 12 at the time of receiving the white light is stored as the Ye and the Cy. After that, stored contents are read out simultaneously, and are synthesized, then, a color video signal can be generated. In such a way, high resolution can be obtained with the simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a photographic film player that outputs a positive image signal by shading a photographic film. This invention relates to a capable photographic film player.

(Front Tank of the Invention) A device is known that shoots a positive or negative photographic film using an FF11 means and sends out a positive image (video) signal. The film monitor of this scale irradiates the photographic film with light from a light source and collects the transmitted light from the photographic film as an I.
The signal taken by the II@ means and read by the Waa means is output as a positive image signal.

Figure 5 shows this type of photographic film player with three plates.
FIG. 3 is a configuration diagram showing the configuration when implemented in D. In this figure, 1 is a light source for illuminating the film, and 2 is the film. It is assumed that this film 2 is held by a holding drive device (not shown) and is aligned with a desired frame. 3 is a lens for condensing the light transmitted through the film 2, and 4 is a lens for collecting the light from the film 2 in red (R) and green (G).

A dichroic prism that separates blue (B), 5 is a COD that receives R light, 16 is a COD that receives G light, 7 is B
The COD 8 that receives the light is a signal processing circuit that combines the outputs of the three CODs and converts it into a color image signal.

This device is characterized by high resolution because it uses dedicated CODs for R, G, and B, respectively.

Figure 6 shows this photographic film player with a single-panel CO
FIG. 3 is a configuration diagram showing the configuration when implemented in D. In this figure, 1 is a light source for illuminating the film, and 2 is the film. It is assumed that this film 2 is held by a holding drive device (not shown) and is aligned with a desired frame. 3 is a lens for condensing the light transmitted through the film 2; 5 is a CCD that receives the light from the film 2; 8 is a signal processing circuit that converts the output of the COD into a color image signal; 9 is a signal processing circuit for the CCD 5. This is a color filter array (hereinafter simply referred to as a color filter) that performs color separation corresponding to each pixel.

This uses color filters to extract three color signals from one COD. Therefore, it has the feature that the structure is simple.

FIG. 7 is a pattern diagram showing an example of the color arrangement of the color filter 9 shown in FIG. What is shown in this figure is the so-called Bayer method (G checkered RB line sequential method).
Basically, G, which requires high resolution, is arranged in a checkerboard pattern, and in the remaining part, two color signals, R and B, which require relatively low resolution, are arranged line-sequentially.

FIG. 8 is a pattern diagram showing another example of the color arrangement of the color filter 9 shown in FIG. What is shown in this figure is the so-called G stripe RBIil sequential method, in which G, which requires high resolution, is arranged in a stripe pattern, and two color signals @R and B, which require relatively low resolution, are placed in the remaining part. Each one! The basic shape is two pixels arranged alternately in a rectangular direction.

In addition, there is also a filter in which R, G, and B are arranged in a vertical strip.

(Problems to be Solved by the Invention) Among the above devices, the one using the three-plate COD has a high resolution, but has the disadvantage that three CODs and a dichroic prism are required, making the device expensive and complicated. There is. Then, it is necessary to align the three CODs,
There is also a problem that adjustment is troublesome.

Further, although the structure using a single-plate COD is simple, it has the disadvantage that the resolution is low because signals of multiple colors are created with a single COD.

FIG. 9 is a pattern diagram showing the pattern of the light receiving surface of the COD. Here, a case of 4 (horizontal) x 6 (1 straight) pixels is shown. The shaded area in this figure is a photodiode that performs photoelectric conversion.

In addition to this, there are vertical transfer CODs that transfer charges generated in photodiodes in the vertical direction, and horizontal transfer CODs that transfer charges from the vertical transfer CODs in the horizontal direction. Therefore, the vertical transfer COD and the horizontal transfer COD occupy a large proportion of the area of the element, and the proportion of the photodiode is small (small aperture ratio), which also causes the resolution to decrease.

The present invention has been made in view of the above-mentioned problems, and its object is to realize a high-resolution photographic film brace with a simple structure.

(Means for Solving the Problems) The present invention, which solves the above problems, irradiates a photographic film with light from a light source, receives the transmitted light from the photographic film with a solid-state dancing element, and reads it with a solid-state element. The photographic film player outputs the received signal as a positive image signal, and the photographic film player includes a transparent rocking plate that is arranged in front of the light receiving surface of the solid-state image sensor and can swing about an axis perpendicular to the optical axis. , a solid-state image pickup device including a light emitting means for sequentially irradiating a photographic film with two colors of light, white light and green light, and a color filter array in which yellow and cyan are arranged alternately, and rocking of the transparent rocking plate. an exposure control means for performing exposure before and after swinging;
A storage means for storing the solid l1i1(@!hydrogen image output for each color before and after the swinging of the transparent rocking plate, and a color image signal from the image signal of each color stored in the storage means); a signal processing means for creating a video signal, and the optical path difference in the horizontal direction when the transparent oscillating plate is oscillated is half the pixel pitch in the horizontal direction of the solid-state image element; The present invention is characterized in that images taken before and after the motion plate is oscillated are combined and output.

(Function) First, the transparent rocking plate is fixed to one side and exposed to green light and white light. First, the output of the solid-state image sensor when receiving green light is stored. Next, the output of the solid-state image sensor when receiving white light is stored as yellow and cyan. After this, the transparent rocking plate is fixed to the other side, and exposure to green light and white light is performed. First, the output of the solid-state R image element when receiving green light is stored. Next, the output of the solid state image carrier when receiving white light is stored as yellow and cyan.

Thereafter, the stored contents are simultaneously read out and combined to create a color video signal.

(Example) Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the structure of an embodiment of the present invention.

Components in this figure that are the same as those in FIG. 5 or 6 are given the same numbers and their explanations will be omitted. 10 is a light emitting unit for illuminating the film.

This light emitting unit 10 sequentially emits green light and white light, and is composed of a large number of RGBG color light emitting diodes, or a white light source (such as a strobe) and a selectively used green filter. has been done. 11
is a transparent rocking plate (hereinafter simply referred to as rocking plate) attached to the CCDrfi surface. This rocking plate 2 is arranged so as to be rockable about an axis in the vertical direction of the CCD. 12
is a COD receiving light from film 2. This CC
A color filter array (hereinafter simply referred to as color filter) is arranged on the light receiving surface of D12. This color filter has a pattern of vertical stripes of yellow (Ye) and cyan (Cy). 13 is an AID converter for A/D converting the output of the CCD 12, and 14 to 17 are memories for storing digitally converted signals, respectively. The memories 14 and 16 are used to store signals generated by the rocking plate, and the memories 15 and 17 are used to store signals after the rocking plate is rocked. Among these, memories 14 and 15 are for storing green signals, and memories 16 and 17 are for storing yellow and cyan signals.

18 to 21 each D/A converting the output of the memory.
/A variable yA device. 22 is an encoder that synthesizes the D/A converted image data and converts it into a color video signal;
23 is the rocking timing of the rocking plate 11, memories 14 to 17
This is a system control circuit that controls the storage and readout timing as well as the entire device.

FIG. 2 is a pattern diagram showing the pattern of color filters attached to the CCD 12. As is clear from this figure, yellow Ye and cyan Cy are alternately arranged in stripes.

FIG. 3 is a flowchart showing the operation of the present invention.

Hereinafter, the operation of the apparatus of the present invention will be explained using FIGS. 1 to 3.

First, after setting the film 2 at a predetermined position, the rocking plate 12 is fixed at a reference position (step (2)).

The reference position of this rocking plate will be described below.

FIG. 4 is a cross-sectional view of the CGDI 2 and the swing plate 11 in the horizontal direction (A-A direction in FIG. 2 or 9). CCD
The shaded part 12 is a photodiode. Rocking plate 1
The reference position is indicated by a solid line. The incident light at this time is indicated by a solid arrow.

Here, green light is emitted from the light emitting unit 10 (step 2). When the light emitting unit 10 is composed of light emitting diodes, only the green light emitting diodes are selectively illuminated. Furthermore, if the light emitting unit 1-10 is composed of a white light source and a green filter, the white light source is caused to emit light while using the green filter.

Then, the transmitted light of the film irradiated with green light is detected by CCD.
I'll take it at 12. At this time, the green light passes through the color filter 11 as it is. Then, the output of CCD12 is
D conversion is performed and the data is stored in the memory 14 (step ■).

Next, the light emitting unit 10 emits white light (step 2). When the light emitting unit 10 is composed of light emitting diodes, the light emitting diodes of three colors of RGB are emitted. Furthermore, if the light emitting unit 10 is composed of a white light source and a green filter, the white light source emits light without using the green filter.

Then, the transmitted light of the film irradiated with white light is detected by CCD.
Take it at I2. At this time, CCD1
Yellow and cyan images are formed on the second light receiving element. Then, the output of the CCD 12 is A/D converted and the yellow and cyan outputs are stored in the memory 16 (step 2).

Next, the swing plate 12 is fixed at another position. (Step ■
).

The dotted line of the swing plate 11 in FIG. 4 is the position after swinging. At this time, the incident light indicated by the dotted line arrow is
12 into the diode. This deviation of the incident light causes the horizontal direction of the photodiode of CCDI2.
The thickness, refractive index, and swing angle of the swing plate 11 are adjusted so as to correspond to /2 pitch.

Here, the light emitting unit 10 emits green light (step). When the light emitting unit 10 is composed of light emitting diodes, only the green light emitting diodes are selectively illuminated. Furthermore, if the light emitting unit 10 is composed of a white light source and a green filter, the white light source emits light while using the green filter.

Then, the transmitted light of the film irradiated with green light is detected by CCD.
I'll take it at 12. At this time, the green light passes through the color filter 11 as it is. Then, the output of CCD12 is
D conversion is performed and the data is stored in the memory 15 (step ■).

Next, the light emitting unit 10 emits white light (step 2). When the light emitting unit 10 is composed of light emitting diodes, the light emitting diodes of three colors of RGB are emitted. Furthermore, if the light emitting unit 10 is composed of a white light source and a green filter, the white light source emits light without using the green filter.

Then, the transmitted light of the film irradiated with white light is detected by CCD.
I'll take it at 12. At this time, the color filter 11 allows CC
Yellow O- and cyan images are formed on the light receiving element of D12. Then, the output of the CCD 12 is A/D converted and stored in the memory 17 (step [phase]).

Thereafter, the image data stored in each of the memories 14 to 17 is read out. Here, since the image stored in the memory 15.17 is shifted by 1/2 of the pixel pitch in the horizontal direction compared to the image stored in the memory 14.16, the readout timing is shifted. There is a need. For this purpose, the timing of the read signal applied from the system control circuit 19 to the memories 14 and 15 is made uniform.

Then, each of these image data is subjected to D/Δ conversion and applied to the encoder 22. The encoder 22 creates an NTSC composite signal or the like from these signals and outputs it (step O).

Note that when the film is negative, it is output after performing negative-positive reversal. After this, when monitoring other frames of the film, the desired frame is set again and the above operation is repeated.

As described above, two exposures before and after shaking the Jlii 8 board are equivalent to doubling the number of pixels in CG[)12 in the horizontal direction. In other words, the horizontal resolution is doubled.

By exposing with green light and white light, the G signal, which is the main component of the luminance signal, is removed from all pixels regardless of the color filter, making it possible to achieve high resolution.

That is, although it is a single-chip type, it is possible to obtain a resolution equivalent to or higher than that of a two-chip type.

However, with the above four exposures, the same film image was divided into three colors, green, yellow, and cyan, and read with a 1/2 dot shift in the horizontal direction, and these images were combined on the encoder. It turns out.

In the above description, the exposure is performed four times, but the invention is not limited to this. For example, rocking plate 1
If 1 is divided into 3 stages and exposure is performed a total of 6 times, the resolution can be further improved.

Also, only expose twice and shake! It is also effective to perform exposure to white light before 11, and exposure to green light after rocking (or vice versa). In this case, the number of pixels in the horizontal direction is doubled, and the array of color filters is 'y'e, G, C.
The same effect as the deck COD method with V and G vertical stripes can be obtained.

Further, by swinging the transparent swing plate 11 around the horizontal axis, the vertical resolution am can be improved. In this case, the current standard preview signal (N
TSC, etc.), the effect is small, but if it is output as a high-quality or high-definition signal other than this, the effect can be expected.

Therefore, it is conceivable to perform exposure a plurality of times by combining the vertical and horizontal swings of the swing plate. In such a case, it is necessary to prepare a memory corresponding to the number of exposures.

In the above description, the color filters are Ye and Cy vertical stripe filters, but other patterns may be used.

Further, instead of swinging the transparent swinging plate 11, the same effect can be obtained by inserting and removing a diagonal plate. Then, instead of changing the emission color of the light emitting unit 10, C
The effect is the same even if a green filter is placed wide in front of the CD 12. A similar effect can be obtained by combining these and temporarily attaching green diagonal plates.

(Effects of the Invention) As explained in detail above, in the present invention, the transparent swinging plate is oscillated to perform exposure multiple times, and Ye and Cy
A COD with color filters is exposed to green light and white light, and 11! An image signal is created from the G, Ye, and Cy signals before and after It. Therefore, it is possible to realize a photographic film player that can obtain high-resolution images with a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a pattern diagram showing a color filter pattern, FIG. 3 is a flowchart showing the operation of the present invention, and FIG. 4 is a swing plate and 5 and 6 are block diagrams showing the structure of a conventional photographic film player; FIGS. 7 and 8 are pattern diagrams showing color filter patterns;
FIG. 9 is a pattern diagram showing the pattern of the light receiving surface of the COD. 10... Light emitting unit 11... Rocking plate 12...
・CCD 13...A/D converter 14-1
7...Memory 18-21...D/A converter 22...Encoder 23...System control circuit Patent applicant Number 2 Ka Co., Ltd.
Company representative Patent attorney Ijima
Fuji Jigai 1 person 3rd 4th 4th Ku angle 45 S decoy tube 6 Ku mill filter 9 Rusuden 7 Diagram negative ■ 8 Diagram

Claims (1)

[Scope of Claims] A photographic film player that irradiates a photographic film with light from a light source, receives transmitted light from the photographic film with a solid-state imaging device, and outputs a signal read by the solid-state imaging device as a positive image signal. A transparent rocking plate is placed in front of the light-receiving surface of the solid-state image sensor and can swing around an axis perpendicular to the optical axis, and a photographic film is used to transmit two colors of light, white light and green light. a solid-state imaging device equipped with a color filter array in which yellow and cyan are alternately arranged; and an exposure control means for performing exposure before and after the swinging of the transparent rocking plate; storage means for storing the image output of the solid-state image sensor for each color before and after the swinging of the transparent rocking plate; and a color video signal from the image signals of the respective colors stored in the storage means. and a signal processing means for creating a signal processing means for generating a signal so that the optical path difference in the horizontal direction when the transparent rocking plate is rocked is half the pixel pitch in the horizontal direction of the solid-state image sensor, and A photographic film player characterized in that it is configured to combine and output images taken before and after the movement.