JPH0746852B2 - Imaging recording method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of capturing / recording / reproducing a still image with high density.

[Prior art]

Conventionally, when a still image is captured and recorded by a high resolution image sensor in a VTR or the like, X (horizontal) of each field of the recorded image is recorded.
And the number of sampling pixels in the Y (vertical) direction increases,
For example, about 400 to 800 in the X direction and 800 in the Y direction.
It is possible to use

[Problems to be solved by the invention] However, this method is different from the current TV standard method, for example, (NTSC method) format, and compatibility of the recording and reproducing hardware with the conventional method is lost. As a result, the conventional hardware cannot be used.

The present invention has been made by paying attention to the conventional problems as described above, and an object thereof is to enable recording and reproduction of high-density still images with the current TV standard system hardware.

[Means for solving problems]

When capturing and recording still images with a high-resolution element, line data of each field is read out by dot interlacing
It was configured to record in a standard way.

[Action]

In the interlaced mode, the signal recorded by the above structure is interlaced for each field and is dot-interlaced in the horizontal direction. In the high-definition mode, a high-resolution image signal can be obtained by combining the dot-interlaced signals. Is obtained.

〔Example〕

The present invention will be described below based on examples. In Figure 1,
FIG. 1 is a diagram showing an embodiment of an image data reading format (pixel array) from an image sensor according to the present invention. If the current TV standard system is, for example, the NTSC system, the number of effective scanning lines of one field by line interlacing is 525 × 0.93 / 2 ≈ 244, which is about 93% of the total number of scanning lines 525. In the example, the number of pixels in the Y direction is twice that, which is 488.

Since the number of pixels in the X direction by the image sensor is not directly related to the compatibility of the hardware, it is better to have a larger number.
1,140, and the address of each pixel is represented by coordinates D (X, Y), as shown in FIG.

Next, a method of reading out and recording these image data by so-called dot interlacing for scanning different pixels for each field according to the present invention will be described with reference to FIG. The high-density image frames of the present embodiment with X = 1,140 and Y = 488 are divided into four fields F-1, F-2, F-3, F-.
Each image data is distributed to the fields of X = 570 and Y = 244 respectively. That is, for field F-1, D (1,1), D (3,1),
D (5,1) ……; D (1,3), D (3,3), D (5,3) ……; D
(1,5), D (3,5), D (5,5) ... For F-2, D (1,2), D (3,2), D (5,2)
……; D (1,4), D (3,4), D (5,4) ……; D (1,6),
D (3,6), D (5,6) ... For F-3, D (2,1), D (4,1), D (6,1)
……; D (2,3), D (4,3), D (6,3) ……; D (2,5),
D (4,5), D (6,5) ... For F-4, D (2,2), D (4,2), D (6,2)
……; D (2,4), D (4,4), D (6,4) ……; D (2,6),
D (4,6), D (6,6) ... Same as below.

When each pixel is distributed as described above, each field F-1
-F-4 are all in NTSC standard format format, so each pair of fields (F-1, F-2); (F
Each frame is composed of −3, F−4), and when monitoring such an image, it is possible to take out two fields and view them with a conventional NTSC monitor TV.

Further, the original high density image is the fields F-1 to F.
All the image data of -4 can be combined by a frame memory or the like and monitored by another high-definition output device.

FIG. 3 shows a block diagram of an embodiment circuit according to the present invention. Reference numeral 1 denotes an image sensor, which uses a high-resolution image pickup device such as a MOS type, a bipolar type, or an electrostatic induction type capable of divided reading. When using a sensor that does not have the division reading function, it can be supplemented by providing an external memory. Reference numeral 2 denotes a sensor read timing generation unit, which reads each pixel (image data) in the order described above, and the signal processing unit 4 limits the band. Reference numeral 3 is a signal amplifier of the image sensor 1. The signal processing unit 4
The output signal of is a standard TV system, that is, in the case of this embodiment.
Since it conforms to the NTSC format, it has hardware compatibility and can record each field information in the NTSC VTR5.

In playback mode, if the original image quality of the NTSC system is sufficient, you can view it on the NTSC system monitor TV6 as it is. If you need the original high-density image, the analog / digital converter 7 Is converted into a digital signal by using, and the memory controller 9 and the frame memory 8 are used to perform an arrangement reverse to that in the divided reading to re-synthesize an image. This output signal is converted into an analog signal by the digital-analog converter 10, and is input to the high definition output device 11 such as a high definition monitor TV or a high definition printer to reproduce the original high density high quality image. be able to.

〔effect〕

As described above, according to the present invention, the line data of each field by the image pickup device is read and interlaced and recorded by the current TV standard system format recording device, so that high-density still image data is obtained. It is now possible to record and play back with the current standard TV system equipment without the need to use special dedicated equipment, and to ensure compatibility of the hardware.

[Brief description of drawings]

FIG. 1 is an embodiment of a format for reading image data from an image pickup device according to the present invention, FIG. 2 is an explanatory view of a method for recording the image data shown in FIG. 1, and FIG. 3 is an embodiment circuit according to the present invention. It is a block diagram of. 1 ... Image sensor (high-resolution image sensor) 2 ... Sensor read-out timing generator 4 ... Signal processor 5 ... NTSC (current standard) TV system VTR 6 ... NTSC (current standard) TV system monitor TV 8 ... ... Frame memory 11 ... High-definition output device F-1, F-2, F-3, F-4 ... division fields

Claims (1)

[Claims] 1. When a still image is picked up and recorded by an image sensor, the data of the position of (X column, Y row) of the image sensor is (1, 1), (3, 1) in the first field. , (5,
1), ..., (1, 3), (3, 3), (5,
3), ...; (1, 5), (3, 5), (5,
5), ..., In this order, in the second field, (1, 2), (3, 2), (5, 2) ,.
4), (3,4), (5,4), ..., (1,6),
(3, 6), (5, 6), ... are read in this order, and in the third field, (2, 1), (4, 1),
(6,1), ...; (2,3), (4,3), (6,
3), ...; (2,5), (4,5), (6,
5), ..., In this order, in the fourth field, (2,2), (4,2), (6,2) ,.
(2,4), (4,4), (6,4), ..., (2,
6), (4, 6), (6, 6), ...
A recording method characterized by sequentially recording each field signal.