JPH0537944A - Film image input device - Google Patents

Abstract

PURPOSE:To prevent the color tone or brightness of a screen from being changed even when the screen is changed by zooming or scanning in the case of displaying a film image on the screen of a video monitor. CONSTITUTION:In a device for forming the image of a film 24 on the image pickup face of an image pickup element 16, converting the image into an electric signal and reproducing the image on the screen of the video monitor 19, an automatic white balance adjusting circuit 47 and/or an automatic exposure adjusting circuit 49 can be operated only at the time of reference reproducing for reproducing the whole image of one frame so as to fill the whole screen of a video monitor 18. At the time of reference reproducing, a zoom driving part 28 and a scanning mechanism are automatically controlled so that a scanning position is returned to the center of the film 24 and photographing magnification is returned to a prescribed reference value. Once white balance/exposure is adjusted in the reference reproducing state, their readjustment is not executed even when zooming/scanning is executed to hold the white balance/exposure in the reference reproducing state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film image input device, and more particularly, to an image of a developed still photographic film which is picked up by an image pickup means and converted into an image signal, and the image signal is output to a video monitor. The present invention relates to a film image input device for reproducing an image on a video monitor.

[0002]

2. Description of the Related Art Conventionally, there is known a film image input device for photographing a developed still photographic film by an image pickup means, taking out an image of the photographic film as an electric signal, and displaying this on a video monitor (USP. 4,482,924). , USP.4,48
5,406, USP.4,506,300, WO90 / 04301, etc.).

In these film image input devices, an illumination unit for projecting light toward a photographic film, a taking lens, and an image pickup device such as a CCD are coaxially provided. Then, the film is arranged between the lighting unit and the taking lens on the optical axis, and when the light projected from the lighting unit is projected onto the image recorded on the film, the light transmitted through the film is taken by the taking lens. It is focused by and is focused on the CCD.
As a result, the image recorded on the film is converted into an electric signal by the CCD and output. Therefore, the image of the film can be reproduced on the video monitor by connecting the video monitor to the film image input device.

Some of the film image input devices of this type are provided with a zoom mechanism, a film scanning mechanism (X-Y moving mechanism), a CCD rotating mechanism, etc., so that a film image of one frame can be obtained. It is possible to trim inside, and by rotating the CCD with a CCD rotating mechanism, etc., the film image on the video monitor can be displayed regardless of whether the film image is horizontally or vertically recorded on the film. I am trying to make it upright.

[0005]

By the way, in this type of film image input apparatus, an automatic white balance adjusting apparatus for automatically adjusting white balance based on an electric signal obtained from a CCD and an exposure amount are adjusted. Automatic exposure adjustment devices are provided, and these devices adjust the white balance and the exposure amount in real time. Therefore, when a certain frame is zoomed and scanned appropriately and the film image is displayed on the screen of the video monitor for enjoyment, the hue and brightness of the same image will change depending on the zoom and scan conditions. There is a problem that the inside screen is difficult to see.

The present invention has been made in view of such circumstances, and even if the screen changes due to zooming and scanning,
It is an object of the present invention to provide a film image input device capable of preventing the hue and brightness of the screen from changing.

[0007]

In order to achieve the above object, the present invention forms an image of a developed still photographic film on an image pickup surface of an image pickup device through a taking lens and converts it into an electric signal. In a film image input device for reproducing a film image on a screen of a video monitor by outputting an electric signal to a video monitor, a zoom mechanism for changing a photographing magnification by the photographing lens and a photographing position on the film by the photographing lens are displayed. The scanning mechanism to move and the scanning position is returned to the center of the film so that the film image of the whole frame fits the full screen of the video monitor.
Further, the standard reproduction control means for controlling the zoom mechanism and the scan mechanism to return the photographing magnification to a predetermined standard magnification, and the white balance and / or the exposure amount are automatically adjusted based on the information inputted via the photographing lens. Automatic white balance adjusting means and / or automatic exposure adjusting means, which are operable only when control by the standard reproduction controlling means is completed, and automatic white balance adjusting means and / or automatic exposure adjusting means. I am trying.

[0008]

According to the present invention, the automatic white balance adjusting means and / or the automatic exposure adjusting means can be operated only during the standard reproduction in which the film image of the entire frame is reproduced so as to fill the screen of the video monitor. There is. The standard reproduction is performed by automatically controlling the zoom mechanism and the scanning mechanism so that the standard reproduction control means returns the scan position to the center of the film and the photographing magnification to the predetermined standard magnification.

Therefore, when a frame is appropriately zoomed and scanned to display a film image on the screen of the video monitor, the standard reproduction state is started. However, in this standard reproduction state, white balance and / or exposure is performed once. After the amount is adjusted, the white balance and / or the exposure amount are not adjusted after zooming and scanning, and the white balance and / or the exposure amount in the standard reproduction state are maintained. As a result, even if the screen changes due to zooming and scanning, changes in the hue and brightness of the screen are prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a film image input apparatus according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a block diagram showing a first embodiment of a film image input apparatus according to the present invention. As shown in the figure, this film image input device illuminates a developed still photographic film 24 by an illumination unit 12, and the photographic lens 14 and C are used to illuminate it.
The image is picked up by an image pickup device including an image pickup device 16 such as a CD, and an image signal is output to the video monitor 19.
9 is used to reproduce the film image.

The illumination unit 12 includes a light source 18 and a reflector 20.
And the diffuser plate 22, and the light from the light source 18 and the reflector plate 2
The light reflected by 0 is projected onto the diffusion plate 22 and diffused here to become film illumination light. This illumination light is film 2
The image No. 4 is irradiated and guided to the taking lens 14. The taking lens 14 is a zoom lens including a variable power lens 26,
Zoom drive unit 2 for inputting a zoom signal from the control unit 32
The variable power lens 26 is moved in the left-right direction in FIG. 1 by 8 to perform a zooming operation, thereby zooming in and out the image of the film 24. Further, the zoom position detection unit 30 detects the moving position (zoom position) of the variable power lens 26 and adds the zoom information to the control unit 32.

The film drive unit 34 includes a reel motor, a supply reel, a take-up reel and the like (not shown), and the control unit 3
Various film feed signals can be added from 2 onward. Then, the film driving unit 34 moves the film 24 in the X direction (direction orthogonal to the paper surface in FIG. 1) according to the input signal. The film drive unit 34 moves the film 24 at high speed during fast-forwarding, rewinding, and frame-by-frame feeding, and moves the film 24 at low speed during scan-feeding.

On the other hand, the lens driving section 38 moves the zoom lens 14 and the CCD 16 in the Y direction (vertical direction in FIG. 1) according to the scan signal applied from the control section 32. Therefore, the scan driving of the film 24 by the film driving unit 34 and the zoom lens 1 by the lens driving unit 38 are performed.
4 and the movement of the CCD 16 allow the image of the film 24 to be scanned in the vertical and horizontal directions.

The film image photographed by the zoom lens 14 is formed on the light receiving surface of the CCD 16 and is converted by each sensor of the CCD 16 into a signal charge of an amount corresponding to the intensity of light. The signal charges are sequentially read and output to the image signal processing circuit 17. The CCD 16 has color filters of different colors (R), green (G), and blue (B) for each pixel.

The image signal processing circuit 17 includes a color separation circuit for extracting R, G, B signals from an input signal, a sample hold circuit, a γ correction circuit, a matrix circuit, an encoder circuit and the like, and a predetermined signal is supplied by these circuits. After the processing, the image signal showing the film image is output to the video monitor 19. As a result, the image on the film 24 is displayed on the video monitor 19.

The automatic white balance adjusting circuit 47 (hereinafter referred to as AWB 47) is the image signal processing circuit 17.
Color difference signals (RY) and (BY) generated in
Are respectively integrated, and the gain of the amplifier for amplifying the R signal and the B signal is adjusted so that the integrated value becomes a predetermined reference value showing gray. The reason for comparing with a predetermined reference value indicating gray is that the integrated values of the color difference signals (RY) and (BY) of the image with white balance adjusted become values indicating gray.

The automatic exposure adjusting circuit 48 (hereinafter referred to as AE48) integrates the luminance signal Y generated in the image signal processing circuit 17, and stops the diaphragm 27 so that the integrated value becomes a value showing a predetermined brightness. Adjust. The window switching unit 49 switches the windows of the AWB 47 and the AE 48, that is, the integration range according to a command signal applied from the control unit 46, and determines whether the film image to be projected on the frame of the film 24 is in the horizontal position or the vertical position. Switch to a window suitable for each position accordingly. The above AW
Details of B47, AE48, and window switching unit 49 will be described later.

The CCD rotation unit 40 receives the rotation command signal from the control unit 32 and rotates the CCD 16 in the clockwise direction (CW direction) by 90 ° or 180 ° when the CCD 16 is viewed from the photographing lens side.
Rotated by 270 ° and 270 °, and the rotational position detection unit 42 is set to
The rotational position of 6 is detected, and the positional information is output to the control unit 32. If the image reproduced on the video monitor 19 is rotated by 90 ° in the counterclockwise direction (CCW direction), the monitor image can be erected by rotating the CCD 16 by 90 ° in the CW direction. Similarly, when the image reproduced on the video monitor 19 is rotated 90 ° in the CW direction, the CCD 16 is moved to 270 ° (C
When the image reproduced on the video monitor 19 is turned upside down, the CCD 16 can be rotated 180 ° in the CW direction to erect the monitor image.

The control unit 32, based on signals from the zoom position detecting unit 30, the rotation position detecting unit 42, the film information recording / reproducing unit 44, and the operating unit 46, the zoom driving unit 28, the film driving unit 34, and the lens driving unit 38. , CCD rotation unit 40
To the film information recording / reproducing section 44 so that the film information is recorded on the film 24.

The film information recording / reproducing section 44 is used for the film 2
Film information (eg, on the magnetic recording surface of each frame of 4
(Zoom information, scan position information, CCD rotation information, etc.) is recorded by a signal from the control unit 32, and film information is read from the film 24 and output to the control unit 32. The frame detection of the film 24 is performed by the film information recording / reproducing unit 44 reading the frame information recorded for each frame of the film 24, or a notch (not shown) which is provided in advance in the film 24 and indicates a frame position. ) Is optically and mechanically detected by a frame detection means, and the frame detection means outputs frame information to the control section 32.

Next, the case where the film 24 is advanced by one frame and the image of the next frame is reproduced will be described. As shown in the flowchart of FIG. 2, the frame advance switch SW-FW
When D or SW-REV is pressed, forward or backward frame feeding is executed. First, when frame feeding is started, the moving direction of the film is determined (step 5).
0). That is, when the frame feed switch SW-FWD is pressed, the film feed is in the forward direction, and the frame feed switch S
When W-REV is pressed, it is determined that the film is fed in the reverse direction (steps 52 and 54). Then, it is determined whether or not the frame is advanced in the determined film feeding direction (step 56). For example, if the currently detected frame is the final frame and the film feed direction is forward, or if the currently detected frame is the first frame and the film feed direction is reverse, Since the next frame cannot be advanced, after displaying the limit, the process returns to the beginning (steps 58 and 60).

On the other hand, when advancing to the next frame, the screen is muted (step 62) and the reel motor is rotated in the determined film feeding direction (step 6).
4). Then, it is judged whether or not the next frame is detected by the frame detecting means (step 66), and when the next frame is detected, the reverse rotation brake is applied to the reel motor (step 68) to perform the standard reproduction of the frame. It is executed (step 70).

Here, the standard reproduction means that the scan position is returned to the center of the film and the photographing magnification is returned to the standard magnification for reproduction. The standard magnification includes a horizontal standard magnification corresponding to the case where the picture imaged on the frame of the film 24 is horizontal and a vertical standard magnification corresponding to the case where the picture pictured on the frame is vertical. is there. Here, the magnification that can be considered as the horizontal standard magnification is the magnification in which the upper and lower edges of the frame of the film match the upper and lower edges of the monitor screen, as shown in FIG. As shown in (B), the picture vertically projected on the frame is displayed on the CCD 16 by 90
The magnification is such that the upper and lower edges of the picture match the upper and lower edges of the monitor screen when rotated upright.

Then, the standard reproduction is started, and the process waits until the photographing magnification of the zoom lens reaches the standard magnification (step 72). After that, the white balance adjustment and the exposure amount adjustment by the AWB 47 and the AE 48 are performed (step 74). ), The mute is released, and the film image is displayed on the screen (step 76). Then, the key buffer is cleared, and the frame feed switch can be input again, and the process returns to the beginning (steps 78 and 79).

As the standard reproduction in step 70, the horizontal standard reproduction or the vertical standard reproduction is performed in accordance with the rotation position of the CCD 16. Therefore, for example, when the rotation position of the CCD 16 is horizontal and the film image projected on the film is vertical, the image reproduced on the video monitor 19 is not upright as shown in FIG. .. In this case, the CCD 16 is moved in the CW direction by 270 ° as described above.
By rotating (90 ° in CCW direction)
The monitor image can be erected as shown in FIG. In addition, in order to display the screen of FIG.
It is necessary to rotate the CCD 16 and change the photographing magnification of the zoom lens from the standard horizontal magnification to the standard vertical magnification.

Next, the case of rotating the screen of the video monitor 19 will be described. As shown in the flowchart of FIG. 4, first, it is determined whether or not rotation is necessary (whether or not a rotation command button (not shown) is pressed) (step 80), and when rotation is unnecessary, the film image is output as it is. Then, the process returns to the beginning (step 82). If rotation is required, the screen is muted (step 86) and the CCD 1 is moved toward the rotation position commanded by the rotation command button (not shown).
The rotation of 6 is started, and it is determined whether or not the instructed rotational position is the lateral position (steps 88, 90).

When the rotation position is the horizontal position, the horizontal standard reproduction is performed (step 92). That is, the scan position is returned to the center of the film, and the photographing magnification is returned to the horizontal standard magnification. Subsequently, it is determined whether or not the rotation of the CCD 16 is completed (step 94), and when the rotation is completed, the window switching unit 49 (FIG. 1) causes the AWB 47, the AE 48.
Switch the window to the horizontal window range and set. Then, the AWB 47 adjusts the white balance based on the color difference signals (RY) and (BY) in the set window, and similarly, the AE 48 adjusts the aperture 27 based on the luminance signal Y in the window. Adjust (step 96).

Thereafter, the mute is released, the film image is displayed on the screen, and the process returns to the beginning (steps 98, 10).
0). On the other hand, if it is determined in step 90 that the rotational position is the vertical position, vertical standard reproduction is performed (step 102). That is, the scan position is returned to the center of the film, and the photographing magnification is returned to the vertical standard magnification. Then CC
It is determined whether the rotation of D16 is completed (step 10
4) When the rotation is completed, the window switching unit 49 (FIG. 1) switches the windows of the AWB 47 and AE 48 to the vertical window range. And AWB
The 47 and the AE 48 adjust the white balance and the exposure amount based on the signal in the set window in the same manner as the operation in step 96 (step 106), and proceed to step 98.

The horizontal position window is a window suitable for reproducing the horizontal position film image, for example, as shown in FIG.
The window in the vertical position is set in the area surrounded by the dotted line in (A), and the window in the vertical position is a window suitable for reproducing the film image in the vertical position, and is set in the area surrounded by the dotted line in FIG. 3B, for example. Further, the white balance adjustment and the exposure amount adjustment executed in step 74 of FIG. 2 are also performed based on the signal in the window switched depending on whether the film image is in the vertical position or the horizontal position.

Now, after the frame feeding is completed or the CCD rotation is completed, the standard reproduction state is set as described above.
Thereafter, if necessary, a zoom switch and a scan switch (not shown) are used to manually control the zoom drive unit and the scan mechanism to perform zooming and scanning. However, in order to prevent the hue and brightness of the screen from changing even if the screen changes due to zooming and scanning, this film image input device causes the window switching unit 49 to be switched from the control unit 32 in a state other than the standard reproduction state. The AWB 47 and the AE 48 are made inoperable via the.

That is, the standard reproduction during the frame advance shown in FIG. 2 or the CCD rotation shown in FIG. 4 (step 7 in FIG. 2).
0, immediately after the completion of steps 92 and 102) in FIG.
Although white balance adjustment and exposure amount adjustment by B47 and AE48 are performed (step 74 in FIG. 2,
(Steps 96 and 106 in FIG. 4), and thereafter, when performing zooming and scanning by manually controlling the zoom driving unit and the scanning mechanism, the white balance and the exposure amount should be fixed to the values adjusted during the standard reproduction of the film image. I have to.

It should be noted that in the present embodiment, during frame advance or CCD
Although the white balance adjustment and the exposure amount adjustment after the standard reproduction executed during the rotation have been described, the present invention is not limited to this, and when the standard reproduction button for executing the standard reproduction from any zoom position or scan position is provided. Alternatively, the white balance adjustment and the exposure amount adjustment may be performed after the standard reproduction is completed by operating the standard reproduction button.

In addition, in a mode other than the standard reproduction state, AWB4
Although 7 and AE48 are made inoperable respectively, the present invention is not limited to this, and only either AWB 47 or AE 48 may be made inoperable.

[0034]

As described above, according to the film image input apparatus of the present invention, the automatic white balance adjustment is performed only during the standard reproduction in which the film image of the entire frame is reproduced so as to fill the screen of the video monitor. Since the means and / or the automatic exposure adjustment means can be operated, even if the screen changes due to zooming and scanning, it is possible to prevent the hue and brightness of the screen from changing. It can solve the problem of being difficult to see.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a film image input device according to the present invention.

FIG. 2 is a flow chart used for explaining control during frame advance in the film image input apparatus shown in FIG.

3A and 3B are views used to describe a horizontal position and a vertical position, respectively.

FIG. 4 is a flowchart used for explaining control during CCD rotation in the film image input device shown in FIG.

[Explanation of symbols]

 12 ... Illumination unit 14 ... Photographing lens (zoom lens) 16 ... Imaging device (CCD) 17 ... Image signal processing circuit 18 ... Video monitor 24 ... Developed still photo film 27 ... Aperture 28 ... Zoom drive unit 30 ... Zoom position detection unit 32 ... Control part 34 ... Film drive part 38 ... Lens drive part 40 ... CCD rotation part 42 ... Rotation position detection part 46 ... Operation part 47 ... Automatic white balance adjustment circuit (AWB) 48 ... Automatic exposure adjustment circuit (AE)

Claims (1)

Claim: What is claimed is: 1. An image of a developed still photographic film is formed on an image pickup surface of an image pickup device through a taking lens, converted into an electric signal, and the electric signal is output to a video monitor. A film image input device for reproducing a film image on a screen of a video monitor by a zoom mechanism for changing a photographing magnification of the photographing lens, a scanning mechanism for moving a photographing position on the film by the photographing lens, and an entire frame. Standard reproduction control means for controlling the zoom mechanism and the scan mechanism so that the scan position is returned to the center of the film so that the film image of the above-mentioned image fills the screen of the video monitor, and the photographing magnification is returned to the predetermined standard magnification. Automatically adjust the white balance and / or the exposure amount based on the information input via A white balance adjusting means and / or an automatic exposure adjusting means, the automatic white balance adjusting means and / or the automatic exposure adjusting means being operable only when the control by the standard reproduction control means is completed. Film image input device.