JPH05130640A - Still image signal processor and printing method - Google Patents

Abstract

PURPOSE:To easily and rapidly obtain the best printed image by printing out plural contracted still images processed at their picture quality so as to have respectively different picture quality and selecting the picture quality parameter of the best picture quality out of the plural printed images. CONSTITUTION:This still image signal processor is provided with a memory 27 for storing the 1st still image signal and plural processing means 25, 26, 28 for executing the picture quality adjusting processing, contracting processing and multi-face processing of the 1st still image signal. The 2nd still image signal consisting of plural contracted still image signals respectively processed by the means 25, 26, 28 and having respectively different picture quality is stored in the memory 27. A printed image of the 2nd still image signal is compared with an image displayed on the screen of a monitor image receiver, and a contracted image on the screen of the monitor image receiver which corresponds to the contracted image with the best picture quality on the printed image is selected and the picture quality of the still image signal of the original still image is adjusted based upon a picture quality parameter corresponding to the picture quality of the contracted picture and stored in the video RAM 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a still image signal processing apparatus and a printing method suitable for processing a still image signal supplied to a video printer.

[0002]

2. Description of the Related Art Conventionally, when a still image is printed by a video printer, a still image signal is supplied to a monitor receiver, and while watching the screen of the still image, the color density, brightness, and contrast of the still image are supplied. The image quality such as white balance is adjusted to the optimum one, and then the still image signal with the adjusted image quality is supplied to the video printer to print the still image.

[0003]

However, since the principle of coloring is different between the screen of the monitor receiver and the print image, even if the still image seen on the screen of the monitor receiver has the best image quality, The print image obtained by supplying the still image signal to the video printer and printing is not always the best image quality. For this reason, it is necessary to repeatedly adjust the image quality of the still image signal until the print image with the best image quality is obtained, and to print the still image each time, which is troublesome and costly. It becomes a problem.

In view of the above points, the present invention provides a still image signal processing apparatus capable of adjusting the image quality of a still image signal so that the best printed image can be obtained easily and quickly, and the best printed image can be obtained easily and quickly. The proposed printing method is to be proposed.

[0005]

According to a first aspect of the present invention, a memory 27 for storing a first still image signal and an image quality adjusting process, a reducing process, and an image adjusting process for the first still image signal stored in the memory 27 are provided. It is provided with processing means 25, 26, 28 for performing multi-screen processing. Then, the second still image signal composed of a plurality of reduced still image signals having different image quality processed by the processing means 25, 26, 28 is stored in the memory 27. Then, the reduced image of the best image quality is selected from the print images of the second still image signals, and the image quality of the still image signal of the original still image is adjusted using the image quality parameter corresponding to the image quality of the reduced image of the best image quality. To process.

A second aspect of the present invention relates to a first memory 27 for storing a first still image signal, and an image quality adjustment process, a reduction process and a first still image signal stored in the first memory 27. A second memory for storing processing means 25, 26, 28 for multi-screen processing and a second still image signal composed of a plurality of reduced still image signals of different image quality processed by the processing means 25, 26, 28. And 31. Then, the reduced image with the best image quality is selected from the print images of the second still image signals, and the image quality of the still image signal of the original still image is adjusted using the image quality parameter corresponding to the image quality of the reduced image with the best image quality. To process.

According to a third aspect of the present invention, a still image signal composed of a plurality of reduced still image signals having different image qualities is generated from the still image signal of the original image and is supplied to a video printer to obtain the original image. A plurality of reduced images with different image qualities are printed, a still image signal of the original image subjected to image quality adjustment processing is generated using the image quality parameters corresponding to the image quality of the reduced image of the best image quality of the print image, and the video printer Supply to.

[0008]

According to the first aspect of the present invention, the first still image signal is stored in the memory 27, and the first still image signal stored in the memory 27 is supplied to the processing means 25, 26, 28. hand,
A second still image signal including a plurality of reduced still image signals having different image qualities obtained by the image quality adjustment processing, the reduction processing, and the multi-screen processing is stored in the memory 27. Then, the reduced image of the best image quality is selected from the print images of the second still image signals, and the image quality of the still image signal of the original still image is adjusted using the image quality parameter corresponding to the image quality of the reduced image of the best image quality. To process.

According to the second aspect of the present invention, the first still image signal is stored in the first memory 27, and the first still image signal stored in the memory 27 is processed by the processing means 25, 26, 28. The second still image signal composed of a plurality of reduced still image signals each having different image quality obtained by the image quality adjustment process, the reduction process, and the multi-screen process is stored in the second memory 31.
Then, the reduced image of the best image quality is selected from the print images of the second still image signals, and the image quality of the still image signal of the original still image is adjusted using the image quality parameter corresponding to the image quality of the reduced image of the best image quality. To process.

According to the third aspect of the present invention, a plurality of reduced still image signals having different image qualities from the still image signal of the original image are supplied to the video printer, and the plurality of image quality of the original image are made different. Print a reduced image of. A still image signal of the original image that has undergone image quality adjustment processing is generated using the image quality parameter corresponding to the image quality of the reduced image of the best image quality of the print image, and is supplied to the video printer.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described in detail below with reference to FIGS. First, an embodiment in which the present invention is applied to a camera-integrated VTR will be described in detail with reference to FIG. In this VTR, a rotary magnetic head records a video signal in the video signal recording section of the inclined track of the magnetic tape, and also records a PCM still image video signal in the PCM audio signal recording section at the end of the inclined track. It is something to do.

First, the circuit of the part similar to the conventional structure of this camera-integrated VTR will be described. The color video signal from the solid-state image sensor 1 composed of CCD is supplied to the A / D converter 3 through the sample / hold circuit and the AGC circuit 2 to be converted into a digital color video signal, and then supplied to the camera process circuit 4. Signal processing. The digital color video signal from the camera process circuit 4 is supplied to the video process circuit 5 for signal processing. This video process circuit 5 has a brightness, contrast, color saturation,
It is equipped with adjusting means for adjusting the white bunlas and the like.
The digital color video signal from the video process circuit 5 is supplied to the D / A converters 6 and 8, respectively. D / A
The analog color video signal from the converter 6 is output from the output terminal 7
From a monitor receiver (not shown). The analog color video signal from the D / A converter 8 is sequentially passed through a multiplexer (which includes an FM modulator, an FM demodulator, a low frequency converter, a high frequency converter, etc.) 17, a recording / reproducing changeover switch 18 and a recording amplifier 19. Is supplied to the pair of rotary magnetic heads 21 and is recorded in the video signal recording portion of the inclined track of the magnetic tape 22. The color video signal recorded in the video signal recording portion of the inclined track of the magnetic tape 22 is reproduced by the pair of rotary magnetic heads 21, and the reproduction amplifier 20 and the recording / reproduction changeover switch 18 are reproduced.
Then, it is sequentially passed through the multiplexer 17 and supplied to the A / D converter 9 to be converted into a digital color video signal, and then supplied to the D / A converter 6 through the video process circuit 15 to be converted into an analog color video signal. And is supplied from the output terminal 7 to a monitor receiver (not shown).

A system control circuit (comprising a microcomputer) 11 controls the entire camera-integrated VTR. The system control circuit 11 is supplied with detection signals and the like from the respective parts from the input terminal 10. Various function control signals from the function controller 12 are supplied to the system control circuit 11. The memory control circuit 13 is the system control circuit 1
1 and controls writing and reading of the video RAM 14 connected to the video process circuit 5. The system control circuit 11 also controls the PCM process circuit 15 connected to the multiplexer 17. P
A RAM 16 is connected to the CM process circuit 15.

Next, recording / reproducing of a still image signal will be described. When the system controller 11 is controlled by the function controller 12 to enter the still signal recording mode, one frame (or one field) of the digital color video signal from the camera process circuit 4 (digital color still image signal)
However, it is supplied to the video RAM 27 through the still image video process circuit 25 and the reduction circuit (in this case, the reduction ratio is 1 and is not reduced) 26 of the multi-screen generation circuit 24, and is written and stored therein. The digital color still image signal read from the video RAM 27 is supplied to the PCM process circuit 15 through the still image video process circuit 25, PCM coded and converted into a PCM color still image signal, and the PCM still image signal is multiplexed. 17, the recording / reproducing changeover switch 18 and the recording amplifier 19 are sequentially connected to be supplied to the pair of rotary magnetic heads 21.
It is recorded in the PCM audio signal recording section at the end of the inclined track of the magnetic tape 22.

The digital color still image signal stored in the video RAM 27 is transferred to the video RAM 14 through the still image video process circuit 25, and the digital color still image signal read from the digital RAM still image signal is transferred through the video process circuit 5. By supplying it to the D / A converter 6 to convert it into an analog color still image signal and supplying it to the monitor receiver from the output terminal 7, the still image can be displayed on the monitor receiver.

The PCM color still image signal recorded in the PCM audio signal recording section of the inclined track of the magnetic tape 22 is sequentially passed through the reproduction amplifier 20, the recording / reproduction changeover switch 18 and the multiplexer 17, and the PCM.
It is supplied to the process circuit 15, PCM-decoded and converted into a digital color still image signal, and the digital color still image signal is supplied to the video RAM 14 through the still image video process circuit 25 and written and stored. Then, the digital color still image signal read from the video RAM 14 is passed through the video process circuit 5 to D
It is supplied to the A / A converter 6 and converted into an analog color still image signal, which is supplied from the output terminal 7 to the monitor receiver, and a still image is displayed on the screen.

Next, the supply of a color still image to a video printer for printing will be described. When the function controller 12 controls the system control circuit 11 to set the output mode to the video printer, the digital color still image signal stored in the video RAM 27 (which is supplied to the monitor receiver at the time of magnetic reproduction or imaging). Image is displayed as the original screen in FIG. 1), the still image video process circuit 25 is read out.
Through the image quality adjustment process circuit 28 to adjust to a desired image quality, and then is supplied to the reduction circuit 26 through the still image video process circuit 26 to display the image length on the screen when it is displayed on the monitor receiver. Is reduced to, for example, 1/3 (note that 30 is a reduction ratio control signal input terminal thereof), and is stored in the video RAM 27 so as to be located at the center on the screen as shown in FIG. Write down and memorize. Then, the reduced digital color still image signal stored in the video RAM 27 is read out and the image quality adjustment process circuit 28 is passed through the still image video process circuit 25.
To the other desired image quality, and then, through the still image video process circuit 26 and the reduction circuit (the reduction ratio is assumed to be 1) 26, reduced digital color still image reduced to 1/3 on the screen. As shown in FIG. 1, the video RA is arranged so that the image signal is located in a portion different from the central reduced image on the screen.
Write it in M27 and memorize it. By repeating the above operation, as shown in FIG. 1, the 5 × 3 reduced images sequentially arranged in a matrix from the one with a large (up) value to the one with a small (down) value of the two image quality parameters are displayed. The digital color still image signal is written in the RAM 27 and stored. In this case, examples of the two types of image quality parameters are luminance (or contrast) and color density shown in FIG. 4, red and blue levels for differentiating white balance shown in FIG. In this case, as for the image quality, by supplying an image quality adjustment control signal to the input terminal 29 of the image quality adjustment circuit 28, the coefficient (digital coefficient) having a different value depending on the image quality parameter is set to the digital luminance signal or the digital red, green or blue signal. Each pixel signal is multiplied, and each coefficient is multiplied by the video RAM 27 (or R in the system control circuit 11) for each reduced digital color still image signal.
AM).

As shown in FIG. 3, in the multi-screen generation circuit 24, when another video RAM 31 is provided in addition to the video RAM 27, the digital color still image signal of the original screen stored in the RAM 27 is read out. In the case where it is supplied to the image quality adjustment process circuit 28 through the still image video process circuit 25 and adjusted to a desired image quality, and then supplied to the reduction circuit 26 through the still image video process circuit 26, when it is displayed on the monitor receiver. On the screen, reduction processing is performed so that the image length is reduced to, for example, 1/3 (note that 30 is a reduction ratio control signal input terminal), and the image is positioned at an arbitrary portion on the screen. It is written in the video RAM 31 and stored. Then, the digital color still image signal of the original image stored in the video RAM 27 is read and supplied to the image quality adjustment process circuit 28 through the still image video process circuit 25 to be adjusted to another desired image quality, and then the still image video is obtained. It is supplied to the reduction circuit 26 through the process circuit 26, and is reduced so that the image length on the screen when it is displayed on the monitor receiver is reduced to, for example, 1/3, and the image is displayed on the screen. It is written and stored in the video RAM 31 so as to be located in another portion. And
The above operation is repeated.

In FIG. 2 or 3, however, as shown in FIG. 1, 5 × 3 pixels are sequentially arranged in a matrix from one having a large value (up) to one having a small value (down) of the two image quality parameters. A digital color still image signal composed of an array of individual reduced images is supplied from an output terminal 23 to a video printer (color video printer) (not shown) to obtain a print image as shown in FIG. In this printed image, the numbers 1, 2, ..., 15 are assigned to each reduced image by handwriting or the digital character still image signal in the video process circuit 25 is converted into a numeric character signal from the character generator. It is added by imprinting it on the print image.

Then, the print image shown in FIG. 6 is compared with what is displayed on the screen of the monitor receiver as shown in FIG. 7, and the monitor image corresponding to the reduced image having the highest image quality on the print image is compared. As shown in FIG. 7, the reduced image on the screen of the machine is moved and selected by moving the arrow cursor by operating the commander cursor moving operator constituting the function controller 12, and the video RAM 27 (in the case of FIG. 3) is selected. Designates an image quality parameter corresponding to the image quality of the reduced image stored in the video RAM 31, that is, a coefficient by which the pixel signal of the digital luminance signal or the digital red, green or blue signal is multiplied. Then, in the image quality adjusting circuit 28, the digital luminance signal of the digital color still image signal of the original image shown in FIG. 1 or the pixel signal of the digital red, green or blue signal is multiplied by the designated coefficient, and then the video printer is processed. By supplying, a still image print image with the best image quality can be obtained.

In the above embodiment, the VTR using the rotary magnetic head is used as the means for recording the still image signal, but a magnetic or optical disk or a card recording / reproducing device may be used.

[0022]

According to the present invention described above, it is possible to obtain a still image signal processing apparatus capable of adjusting the image quality of a still image signal so that the best print image can be obtained easily and quickly.

Further, according to the present invention described above, it is possible to obtain a printing method which can easily and quickly obtain the best print image.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an image of a still image on an original screen and an image of an array of reduced still images for explaining an embodiment of the present invention.

FIG. 2 is a block diagram showing an embodiment of the present invention.

FIG. 3 is a block diagram showing a part of another embodiment.

FIG. 4 is an explanatory diagram showing an example of an image of an array of reduced still images in which two types of image quality parameters are changed.

FIG. 5 is an explanatory diagram showing another example of an image of an array of reduced still images in which two types of image quality parameters are changed.

FIG. 6 is an explanatory diagram showing a print image of an array of reduced still images in which two types of image quality parameters are changed.

FIG. 7 is a diagram used to explain selection of an image of an array of reduced still images in which two types of image quality parameters are changed.

[Explanation of symbols]

 1 CCD 4 Camera Process Circuit 5 Video Process Circuit 14 Video RAM 15 PCM Process Circuit 16 RAM 17 Multiplexer 21 Rotating Magnetic Head 24 Multi-screen Generation Circuit 25 Still Image Video Process Circuit 26 Reduction Circuit 27 Video RAM 28 Image Quality Adjustment Process Circuit

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI Technical display location G09G 5/00 T 8121-5G A 8121-5G D 8121-5G 5/14 8121-5G 5/36 8121-5G

Claims (3)

[Claims] 1. A processing means comprising: a memory for storing a first still image signal; and a processing means for performing image quality adjustment processing, reduction processing and multi-screen processing of the first still image signal stored in the memory. A second still image signal composed of a plurality of reduced still image signals each having a different image quality processed by the above is stored in the memory, and the reduced image of the best image quality is selected from the print images of the second still image signal, A still image signal processing apparatus, characterized in that the still image signal of the original still image is subjected to image quality adjustment processing by using an image quality parameter corresponding to the image quality of the reduced image of the best image quality. 2. A first memory for storing a first still image signal, and processing means for performing image quality adjustment processing, reduction processing, and multi-screen processing on the first still image signal stored in the first memory. A second memory for storing a second still image signal composed of a plurality of reduced still image signals each having a different image quality processed by the processing means, A still image signal processing device, characterized in that a reduced image of image quality is selected and image quality adjustment processing is performed on the still image signal of the original still image with an image quality parameter corresponding to the image quality of the reduced image of the best image quality. 3. A still image signal composed of a plurality of reduced still image signals having different image qualities from the still image signal of the original image is generated and supplied to a video printer to make the image quality of the original image different. A plurality of reduced images are printed, a still image signal of the original image that has undergone image quality adjustment processing is generated using an image quality parameter corresponding to the image quality of the reduced image having the best image quality of the print image, and the still image signal is supplied to the video printer. A printing method characterized by: