JPS61189790A - Video signal recording device for photographic image - Google Patents

Abstract

PURPOSE:To record vividly a photographic image recorded at plural kinds of objects to be photographed to recording media by arranging selectively, in the optical system light path of the image pick-up means, the optical filter to correct so as to make the spectral characteristic of the image pick-up part coincident with the spectral characteristic of respective photographing objects. CONSTITUTION:By arranging selectively, at the edge part of the light source side of a diffusion box 24, a color resolving prism 52 to satisfy the spectral characteristic of both negative film and reversal film and a trimming filter 60 to insulate an optical component of the unnecessary wavelength area respectively according to the fact whether the photographing object is a negative film or a reversal film, an optical system spectral characteristic including an image pick-up part 50 is made coincident with the spectral characteristic of respective photographing objects. For example, in case of a negative film, a trimming film 60 which is lowest in the vicinity of the transmission ratio of 630nm and flat at the wavelength area <=570nm or >=700nm, or in case of the reversal film, a trimming filter 60 which is zero at the wavelength area of the transmission ratio >=720nm and flat at the wavelength area <=650nm are selected.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a video signal recording device for photographic images, and in particular, the present invention relates to a video signal recording device for photographic images, and in particular, photographic images on negative film or reversal film are recorded with a video camera and recorded on a recording medium such as a magnetic disk. The present invention relates to a video signal recording device for photographic images to be recorded.

[Background of the invention]

Recently, with the spread of video cameras, subjects such as negative films, reversal films, and prints can be recorded and stored on recording media such as magnetic disks for electronic cameras and video tapes, and can be played back as needed. So-called video television albums, which can be played back and enjoyed by displaying them on a television screen, have come into use. Along with this, similar to the photo printing service, we have started a service in which photographic images such as negative film are captured at a photo processing factory (hereinafter referred to as the lab), recorded on magnetic disks, etc., and the recorded magnetic disks are handed over to customers. It's about to happen.

Incidentally, such a video television album service requires a video signal recording device for recording photographic images from negative film, reversal film, or prints onto a magnetic disk. Objects photographed by such a video signal recording apparatus, such as negative film and rehearsal film, each have different spectral characteristics. In order to record on a recording medium so that the photographic images recorded on these photographic objects can be reproduced in the same color as the recorded state, the spectral characteristics of the optical system including the imaging section must match the spectral characteristics of the photographic object. It is necessary to do so.

Therefore, in order to photograph multiple types of objects with different spectral characteristics, it is necessary to have a plurality of imaging units having the same spectral characteristics as the spectral characteristics of each object, and the structure of the optical system of the video signal recording device is There is a problem that makes it complicated.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and provides a video signal recording device for photographic images that can clearly record photographic images recorded on a plurality of photographic objects having different spectral characteristics on a recording medium. The purpose is to make suggestions.

[Summary of the Invention] In order to achieve the above object, the present invention captures a photographic image of an object to be photographed by an imaging means, creates a video signal representing the photographic image, and records the video signal by a recording means on a recording medium. In the video signal recording device for photographic images, the imaging section is configured such that the R peak value range of the spectral characteristics of the imaging section of the imaging means includes the R peak values of the spectral characteristics of a plurality of types of objects to be photographed. At the same time, a plurality of types of optical filters are provided corresponding to each object to be photographed to correct the spectral characteristics of the imaging section so as to match the spectral characteristics of each object to be photographed, and for each image of each object to be photographed. The present invention is characterized in that a corresponding optical filter is selectively arranged in the optical path of the optical system of the imaging means.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a photographic image video signal recording apparatus according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows the configuration of an optical system in a video signal recording apparatus according to the present invention. In the figure, the optical system includes a light source unit 10 disposed on the optical axis 100, a negative film 30 that is irradiated with light emitted from the light source 10, and a photographic image recorded on the negative film 30. It is comprised of an image rotation prism 42 that rotates the image so that it becomes an erect image on the unit 50 side, an imaging lens 44, a shutter 46, and an imaging unit 50.

In addition, a film detection element detects the shape and position of a notch formed on the edge of the negative film 30 for each frame, indicating the direction from which the photographic image recorded on the negative film 30 was taken, as well as the vertical, horizontal, and vertical directions. 32 is provided on the side of the negative film 30.

Further, above the negative film 30, with the optical axis 100 in between, blue (B), green (G), and
Negative density detection element 40R140 with a wide dynamic range that detects the density (light amount) of each component of the three primary colors of red (R)
The light source section IO where L is arranged is a lamp reflector 12
A halogen lamp 14 surrounded by a halogen lamp 14, a heat protection filter 16 that absorbs infrared rays and transmits only visible light, and a color temperature correction filter (C, M, Y) provided above the heat protection filter 16 for correcting the color temperature of the light source. ) 18, and further provided above the color temperature correction filter 18, a negative film density correction ND (neutral den
city) filter 20 and color correction filters (C, M,
It consists of a filter group consisting of Y) 22 and a diffusion point 24 disposed above the filter group.

The ND filter 20 is a filter whose optical density changes with the rotation angle. For example, a slit-shaped filter film is formed radially in the radial direction of a disk, and the area of the slit film changes with the rotation angle. filter is used. By changing the rotation angle of the ND filter 20, the amount of light passing through it can be changed logarithmically, for example.

Further, the color correction filter 22 consists of three filters, C, M, and Y, and each of these filters has a filter film formed on, for example, a disk so that the optical density of each color component changes continuously with respect to the rotation angle. The surface is formed in a spiral shape, and the area of the filter membrane changes.

The detection outputs of the notch detection element 32 that detects a notch formed on the edge of the negative film and the negative density detection element 40R140L are taken into a controller to be described later, and are used to drive and control the negative feeding and filters 20 and 22, respectively. . The shutter 46 protects the imaging section 50 from entering into the imaging section 50 at all times.

The imaging unit 50 includes a filter 18.2 from the halogen lamp 14.
The light transmitted through the negative film through the 0.22 mag.
, green (G), and red (R), and image pickup tubes 54, 56, and 58, and image pickup tubes 54 that image each of these color-separated parts of B, G, and R, respectively.
．． It consists of three preamplifiers (not shown) that amplify each output of the 56.58.

Here, the spectral characteristics of the color separation prism 52 are shown in FIG.

In the figure, the spectral characteristics of the color separation prism 52 are shown by solid lines, and as is clear from the figure, the three primary colors B, G,
Among the color components of H, R has a peak transmittance in the range of 650 to 720 nm. This is designed to include both the negative film and the universal film, taking into account that the transmission peak value of R appears at different positions (wavelengths). That is, the spectral characteristics of negative film and reversal film are B as shown in Figures 4 and 5, respectively.
The transmission peak values of , and G are almost the same, but the transmission peak value of the R color component has a peak around 700 nm in the case of a negative film, while it has a peak around 600 nm in the case of a reversal film.
It can be seen that there is a peak around 40 nm.

In this embodiment, the color separation prism 5 has spectral characteristics that satisfy the spectral characteristics of both negative film and reversal film.
2 and a trimming filter 6 which has a characteristic of blocking light components in unnecessary wavelength ranges depending on whether the object to be photographed is a negative film or a partial film.
By selectively arranging 0 at the end of the diffusion box 24 on the light source side, the imaging section 5
The spectral characteristics of the optical system including zero are made to match.

Therefore, when the object to be photographed is a negative film, trimming has the characteristic that the transmittance is lowest in the vicinity of 630 nm and becomes flat in the wavelength range of 570 nm or less or 700 nm or more, as shown by the dashed line P in Figure 3. If the object to be photographed is a rehearsal film, the filter 60 should have characteristics such that the transmittance is zero in the wavelength region of 720 nm or more and becomes flat in the wavelength region of 650 nm or less, as shown by the broken line Q in FIG. The trimming filter 60 having the following is selected.

Next, FIG. 2 shows a control system of the video signal recording apparatus according to the present invention having the above configuration. In FIG. 2, the video signal recording device includes the above-mentioned optical system, a keyboard 110 for inputting density and color correction data of the negative film 30, various condition setting data, etc. The output signals of the sensor 32.40R14OL are taken in, the negative feed is performed based on these output signals, and the filter 20
．． 22, and a video signal processing unit 130 that performs color correction and synthesis of video signals (color separation signals) obtained from the imaging unit 50 under the control of the controller 120 to create a video signal. , video signal processing section 13
a recording unit 140 that receives a video signal output from 0 and records it on a predetermined track of a magnetic disk using a magnetic head, a power supply unit that supplies power to the monitor television 150, 152, the halogen lamp 14, and each part. 160, and a shutter 46 in response to a control signal from the controller 120.
and a prism motor 172 that rotates the image rotation prism 42 by a predetermined angle in response to a control signal from the controller 120.

The controller 120 is a ROM in which fixed data such as reference values indicating the appropriate exposure amount of negative film and programs are stored, and a ROM in which data is temporarily written or read.
A CPU that performs various calculations such as calculating the average density of the negative film 30 based on programs stored in the AM and ROM.
and an I10 interface.

The video signal processing unit 130 also includes an image pickup tube 54 in the image pickup unit 50.
．． 56. A γ correction circuit that performs color correction of the preamplifier output of each color component of B, G, and R obtained by amplifying each video signal of It is composed of a color encoder section and the like that combine the signals into a composite video signal.

The monitor television 150 is for checking the photographic image on the screen when recording a video signal indicating the photographic image recorded on the negative film 30 on the magnetic disk.
The monitor television 152 also has a magnetic disk recording unit 140 on which a video signal representing a photographic image of a negative film has already been recorded.
This is for checking the photographic image when it is reproduced by the reproduction section provided inside.

In the above configuration, first, negative feed and image direction are designated by key operations on the keyboard 110. Further, a detection signal indicating the density of each color component of RlG and B is inputted from the negative density detection element 40R240L.

The controller 120 stores photographic images as royal images on a magnetic disk in the recording section 140 or on the monitor television 1.
A control signal is output to the prism motor 172 to rotate the image rotation prism by a predetermined angle so as to be recorded or displayed on the image rotation prism 50 .

Furthermore, the controller 120 includes a negative density detection element 40R14.
0L detection output is taken in, the density and color balance deviation of the negative film is calculated from these detection outputs, and N is adjusted so that the transmitted light of the negative film becomes a preset value.
Control signals for driving the D filter 20 and color correction filters (C, M, Y) 22 are output to the filter motor 26.

Next, when the operator instructs to open the shutter 46 by operating a key on the keyboard 110, a drive signal is output from the controller 120 to the drive amplifier 170, and the shutter 46 is opened.
6 is released.

As a result, the images of the frames on the negative film 30 are displayed on the monitor television 150. While checking the image on the monitor TV 150, the operator uses the keyboard 110 if it is necessary to further correct the density and color of the negative film.
The correction data is manually input to the controller 120. The controller 120 corrects the reference value indicating the appropriate exposure amount using this correction data, and outputs a control signal to the filter motor 26 to correct and control the rotation angle of the filters 20 and 22 using the corrected value as a new reference value. .

Next, when a command to start recording is given from the keyboard 110, a start signal is output from the controller 120 to the recording section 140, and the recording section 140 records a video signal indicating a photographic image of a predetermined frame of the negative film 30 in a predetermined trunk of the magnetic disk. do.

By repeating the above operations, video signals representing photographic images of each frame of the negative film 30 are sequentially recorded on the magnetic disk.

As explained above, in this embodiment, the color separation prism 52 has spectral characteristics that satisfy the spectral characteristics of both a negative film and a reversal film, and the spectral characteristics are determined depending on whether the object to be photographed is a negative film or a versatile film. Optical filter (trimming filter) with the characteristics of
is selectively placed on the light source side with respect to the object to be photographed, so that the spectral characteristics of the optical system including the imaging section match the spectral characteristics of each object to be photographed, so that both negative film and reversal film can be used. A photographic image recorded on an object to be photographed can be clearly recorded on a recording medium.

In this embodiment, the trimming filter 60 is disposed on the light source side with respect to the object 30, but the present invention is not limited to this. A similar effect can be obtained by disposing it between the camera tube 58 and the imaging tube 58 that captures the R light of the three primary colors.

In the above embodiment, a case has been described in which a photographic image recorded on a negative film or a reversal film is taken, but the present invention can also be applied to a case where a photographic image recorded on a print is taken.

〔Effect of the invention〕

According to the present invention, the imaging section is provided with spectral characteristics including R peak values that have different spectral characteristics for each closest object, and is provided with a plurality of optical filters corresponding to each of the objects to be imaged. It is possible to match the spectral characteristics of the imaging unit with the spectral characteristics of the object to be photographed by selecting the appropriate optical filter accordingly, making it possible to clearly record photographic images recorded on multiple types of objects with different spectral characteristics. Can be recorded on media

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an optical system in an embodiment of a photographic image recording device according to the present invention, FIG. 2 is a block diagram of a control system of a photographic image video signal recording device according to the present invention, and FIG. Figure 1 shows the spectral characteristics of the color separation prism along with the characteristics of the trimming filter for negative film, Figure 4 shows the spectral characteristics of negative film, Figure 5 shows the spectral characteristics of rehearsal film, and Figure 6 shows the spectral characteristics of the color separation prism. The figure shows the spectral characteristics of a color separation prism together with the characteristics of a trimming filter for reversal film. 10... Light source section, 18... Color temperature correction filter,
20... ND filter, 22... Color correction filter, 26... Filter motor, 32... Film detection element, 40R140L... Density detection element,
50... Imaging unit, 52... Color separation prism, 6
0...Trimming filter, 110...Keyboard, 120...Controller, 130...
・Video signal processing section, 140...recording section, 15
0.152...Monitor TV.

Claims (1)

[Scope of Claims] A video signal recording device for photographic images that captures a photographic image of an object to be photographed by an imaging means, creates a video signal representing the photographic image, and records the video signal on a recording medium by a recording means. In this case, the imaging section is configured such that the R peak value range of the spectral characteristics of the imaging section of the imaging means includes the R peak value of the spectral characteristics of a plurality of types of objects to be photographed, and the spectral characteristics of the imaging section are The optical system of the imaging means is equipped with a plurality of types of optical filters corresponding to each object to be photographed for correction to match the spectral characteristics of each object to be photographed. 1. A video signal recording device for photographic images, characterized in that the device is configured to be selectively disposed in an optical path of a photographic image.