JPH0646450A - Image signal printing device - Google Patents

Abstract

PURPOSE:To print the still images without blur even with the mobile image signals. CONSTITUTION:A printing device 10 records the image signals on an instant film and is provided with an image signal fetching decoder 12, the 1st image memories 16a, 17a and 18a which store the odd fields of the image signals, the 2nd image memories 16b, 17b and 18b which store the even fields of the image signals, an image signal movement detecting circuit 25, and the image synthesizing circuits 21, 22 and 23 which properly synthesize the image data stored in those 1st and 2nd image memories. When the images moved, the image data on the odd fields processed and outputted from the circuits 21, 22 and 23. When the images have no movement, the frame data generated from the image data on each field are outputted from the circuits 21-23 and printed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image signal printing apparatus capable of making a hard copy of an image of a cathode ray tube as an original image.

[0002]

2. Description of the Related Art An image signal printing device (for example, a color printing device) for making a hard copy of an image signal obtained from an image output device such as a video camera or a television receiver is a cathode ray line for printing the image signal once. Pipe (CR
T) to form a color image, and then project this color image as an original image on film to expose and develop it to form a latent image, and then print this latent image on photographic paper and then fix it. The color image is hard-copied by applying.

In such a printing apparatus, an image formed by an image signal having a frame structure (frame signal) is used as an original image. In this case, the input image signal is a still image or a moving image. Regardless, the image signal for the even field is generated by interpolating the image signal for the odd field.

[0004]

Then, when the image signal is a still image, there is no particular problem, but when the image signal is a moving image, the vertical resolution is deteriorated and the image is printed in a blurred state. This is because the same signal processing is performed regardless of whether the image signal is a still image or a moving image.

Therefore, the present invention has solved such a conventional problem as described above, in which a CRT image is generated by different signal processing for a still image and a moving image, and an image is printed based on this CRT image. It proposes a printing device adapted to do so.

[0006]

In order to solve the above-mentioned problems, according to the present invention, an image signal output from an image output device is spectrally separated using a color filter and printed on a film. In the apparatus, an image signal capturing means for capturing an image signal, a first image memory storing an odd field of the image signal, a second image memory storing an even field of the image signal, and movement of the image signal. A motion detection circuit for detecting
An image synthesizing unit for appropriately synthesizing the image data stored in the first and second image memories, respectively, and when the motion of the image is detected by the motion detection, either the even field or the odd field. The processed image data is output as frame data from the image synthesizing means, and when the image movement is not detected, the field data output from the image data of the first and second image memories is output from the image synthesizing means. It is characterized in that it is outputted as film data and printed.

[0007]

When the image signal is a color image signal as shown in FIG. 1, it is decomposed into primary color signals R, G and B, and these are supplied to the CRT 38 in a field sequential manner so that a color image of the primary color is projected in a field sequential manner. . These primary color images displayed on the CRT screen are projected on the film 43 provided in the print section 10B and sequentially exposed to print out the color image.

The motion detecting circuit 25 detects the motion of the input image signal. As shown in FIG. 2, when the image is a still image, each memory for odd field and even field (1
6a, 17a, 18a), (16b, 17b, 18b)
A frame image is formed by the field signal output from the. When the image is a moving image, the image signal of the even field is interpolated based on the image signal of the odd field, and the interpolated even field signal and the odd field signal form a frame image.

By applying such processing to a moving image, an image without blurring can be printed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a case where an example of an image signal printing apparatus according to the present invention is applied to the above-mentioned color printing apparatus will be described in detail with reference to the drawings.

FIG. 1 shows a systematic diagram of the main part of a printing apparatus 10 according to the present invention. The printing apparatus 10 includes a print image generation unit 10A and a print unit 10B, and the print image generation unit 10A generates a field-sequential primary color image.

In the print image generator 10A, an image signal is supplied to the terminal 11. As the image signal, a color television signal obtained from an image output device such as an 8 mm video camera, a still video camera or a television receiver can be used.

The image signal is returned to the primary color signals R, G, B in the decoder 12, and the primary color signals R, G, B are supplied to the A / D converters 13, 14, 15 and converted into digital signals having a predetermined number of bits. To be done. The digitized primary color signals R, G, B are stored in the memories 16a, 1 for odd fields, respectively.
7a, 18a and memories 16b, 17 for even fields
The image signals of the corresponding fields are stored in the corresponding image signals supplied to b and 17c.

The outputs (image data) of the paired image memories 16, 17, 18 corresponding to the respective primary color signals R, G, B are supplied to the image synthesizing circuits 21, 22, 23, respectively, in accordance with the movement of the image signals. The synthesizing process is performed. Reference numeral 25 denotes a motion detection circuit provided for that purpose, which will be described in detail later.

The primary color signals R, G, B, which have been appropriately subjected to predetermined signal processing, are converted into analog signals by the D / A converters 31, 32, 33, and then supplied to the switching means 35 via the encoder 34 to be supplied to the respective switching means 35. The primary color signals R, G, B are field sequential signals.

The output time of the field sequential signal is 1: 1:
Instead of 1, each output time is controlled so that a color image can be reproduced correctly. C described later
In consideration of the brightness characteristics of the RT 38, the spectral characteristics of the color filter 42, etc., in this example, R: G: B = 1.0: 0.3: 0.2 (sec) ... (1) The output time of the primary color signals output in the field order is set to.

The field-sequential primary color signals R, G, B are supplied to a gamma correction circuit 36, and gamma correction is performed with the CRT 38 and the color filter 42 included. The gamma-corrected primary color signals R, G, and B are passed through the driver 37 and CR.
The color image corresponding to the primary color signals R, G, B is supplied to T38 and a color image is displayed.

In this example, the CRT 38 is a viewfinder CRT (for example, 1.5 inch size) used in a video camera or the like.

The image of the primary color projected on the screen (tube surface) of the CRT 38 is guided to the print section 10B. The image of the primary color passes through the shutter 41 and the color filter 42, and then passes through the film 4
The image of the primary color is projected onto the image 3 and exposed, and the color image is finally printed.

As the film 43, a peeling type or an integral structure type instant film can be used. As is well known, instant film is a single film in which a photosensitizer and photographic paper are packed, and exposure, development, printing and fixing of color images are carried out in the same pack. There is. When using instant film, its handling is easy and
Dark box 65 containing instant film (see Figure 4)
Has the merit that the configuration of is very simple.

A control circuit 39 controls the opening timing of the shutter 41, the switching timing of the color filter 42, etc. by the input primary color signals R, G, B.

The motion detecting circuit 25 shown in FIG. 1 detects the motion of the primary color signal input in field units, and controls the synthesizing circuits 21, 22, 23 according to the detected output.
Therefore, the R, G, and B primary color signals are supplied to the motion detection circuit 25, and the motion detection as shown in FIG. 2 and the signal synthesis processing after the detection are performed.

Motion detection may be performed for each of the primary color signals R, G, B, and if the signal combining process may be controlled for each of the primary color signals R, G, B, a representative one of the primary color signals R, G, B may be used. It is also possible to detect the motion of only one primary color signal and commonly control the signal combining process of the primary color signals R, G, and B by the motion detection output.

In this example, only the former case will be illustrated. First, in step 51 of FIG. 2, the luminance data DO (n) and DE (n) of the n-th pixel in the odd field and the even field, respectively.
Are compared and the output ΔD (n) of the difference is stored.
Although it is possible to arbitrarily determine which area of pixel data is referred to, in this example, as shown in FIG. 3, only a predetermined area (shown by a chain line) in the central portion of the screen S is referred to. This is because the center of the image is the center of the screen, and there is no particular problem even if the movement of the image is determined by referring to only the image data here. The process of step 51 is performed on all the pixel data in the specific area or all the thinned specific image data. Then, this comparison process is performed for each of the primary color signals R, G, and B.

Next, at step 52, the difference output ΔD
The sum D of the absolute values of (n) is obtained, and then step 5
In 3, the difference d between the reference value DR and the total sum D is calculated.
Then, the magnitude of the difference d is discriminated based on, for example, zero. These processes are also performed for each of the primary color signals R, G, B.

As a result of the size judgment, (a) When d = 0 or d> 0 At this time, it means that there is no motion of the image during one frame, or even if there is, it is below the reference value DR. In this case, it is determined that there is no motion and the still image processing is performed (step 55).

In the still image processing, the image data stored in the memory 16a for odd fields shown in FIG. 1 is used as it is for the odd fields, and the image data stored in the memory 16b for even fields is used as it is for the even fields. used. That is, since the image data in the image memory 16 is used as it is as the data for the frame image, the synthesizing circuit 21 functions as a simple switching means. (B) When d <0 In this case, since D> DR, it is regarded as a moving image and the next combining process is performed (step 56). First, in the odd field, the image data stored in the memory 16a for the odd field shown in FIG. 1 is used as it is, and in the even field, the image data (image data for the odd field) stored in the memory 16a for the odd field is used. Interpolated image data is used.

Although various kinds of interpolation processing are conceivable, this embodiment adopts an interpolation method in which the average of image data of preceding and succeeding lines is used as image data of even field lines. Therefore, the synthesis circuit 21 also functions as an interpolation processing circuit. The fields used may be even fields.

The processes of (a) and (b) are performed by the primary color signals R,
The processing is performed for each of G and B, and either the still image processing or the moving image processing is selected according to the respective motion detections.

FIG. 4 mainly shows a schematic structure of the printing unit 10B. In the figure, a protection filter 60 is attached to the front surface of a CRT 38 used in a video camera or the like, and an image (monochromatic image light) guided here is reflected by a mirror 6.
The optical path is bent at 1 and then guided to the lens system 62 provided in the print unit 10B. The printing unit 10B has a dark box configuration, and the shutter 41 is arranged inside the dark box 65, and the shutter 41 is arranged according to the field sequential timing.
The open / closed state of is controlled. The shutter exposure time may be controlled to obtain the image exposure time represented by the equation (1).

Reference numeral 42 denotes an R, G, B color filter. As described with reference to FIG. 1, a color filter corresponding to the supply timing of the primary color signals R, G, B which are field sequential signals is provided on the optical path. Will be distributed. Therefore, the color filter 42 used is of a rotary type or a slide type.

The monochromatic image light that has passed through the color filter 42 is projected on the film 43 with its optical path further bent by the mirrors 63 and 64. As a result, a series of processes such as sequential exposure is performed by the monochromatic image light, and the color still image is hard copied onto the photographic printing paper 66.

The configuration of the printing unit 10B described above is an example, and various modifications are possible. For example, film 4
As 3, a color printer (multicolor printer, full color printer, etc.) used in OA equipment can be used.

[0034]

As described above, in the image signal printing apparatus according to the present invention, the frame image signal is generated according to the movement of the input image. Therefore, the image quality is good even in the case of a moving image. There is an effect that a color still image can be obtained.

[Brief description of drawings]

FIG. 1 is a system diagram of essential parts showing an example of an image signal printing apparatus according to the present invention.

FIG. 2 is a flowchart showing a motion detection processing system.

FIG. 3 is a diagram showing a motion detection area.

FIG. 4 is a schematic configuration diagram of an image signal printing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Printing device 10A Image generation part for printing 10B Printing part 16,17,18 Image memory 21,22,23 Image composition circuit 35 Switching means 38 CRT 41 for print images 42 Shutter 42 Color filter 43 Film 66 Printing paper

[Procedure amendment]

[Submission date] December 28, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

[0006]

In order to solve the above-mentioned problems, according to the present invention, an image signal is captured in a printing device for the image signal which is adapted to record the image signal output from the image output device on a film. Image signal capturing means, a first image memory for storing an odd field of the image signal, a second image memory for storing an even field of the image signal, and a motion detection circuit for detecting a motion of the image signal. An image synthesizing means for appropriately synthesizing the image data stored in the first and second image memories, respectively, and when the motion of the image is detected by the motion detection, the even field or the odd field When the processed image data is output as frame data from the image synthesizing means, and the motion of the image is not detected It is characterized in that the field data outputted from the image data of the first and second image memory is to be printed is outputted as the film data from said image synthesizing means.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction content]

[0034]

As described above, in the image signal printing apparatus according to the present invention, the frame image signal is generated according to the movement of the input image. Therefore, the image quality is good even in the case of a moving image. There is an effect that a still image can be obtained.

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

[Figure 4]

Claims (3)

[Claims] 1. In an image signal printing apparatus in which an image signal output from an image output apparatus is spectrally separated using a color filter and recorded on a film, an image signal capturing means for capturing the image signal, and the image signal capturing section. A first image memory for storing an odd field, a second image memory for storing an even field of the image signal, a motion detection circuit for detecting a motion of the image signal, and the first and second image memories And an image synthesizing unit for appropriately synthesizing the image data stored in each of the image data, and when the motion of the image is detected by the motion detection, the image data obtained by processing either the even field or the odd field is the image When the image data is output as frame data from the synthesizing unit and no image movement is detected, the first and second image memories are output. Printing device of the image signal, characterized in that the field data outputted from the re-image data is to be printed is output as frame data from said image synthesizing means. 2. The image synthesizing apparatus according to claim 1, wherein the motion detecting circuit detects a motion of a central portion of a screen of the image signal. 3. The image signal printing apparatus according to claim 1, wherein the exposure time of the film is changed according to the characteristics of any one of a color filter, an image output apparatus and a film. Image signal printing device.