JPS6284683A - Picture recording system - Google Patents

Abstract

PURPOSE:To allow the current television system hardware to record and reproduce a high density still picture by offset-sampling a picture at a picture element density integrate-times the number of samples used by the current standard television system format, dividing and recording each field in the standard television system format. CONSTITUTION:It is assumed that the current television standard system is an NTSC system, the number of picture elements in a direction Y in one field is 976 four times the number of high density still picture samples, and the num ber of picture elements in a direction X is 1,600. As the number of actual samples is 976/2X1600X2=390400, a data size in each field is 244X400 each if the picture is divided into eight fields. Since that means a format according to the NTSC standard television system, a recording device with the same system can record the picture. For restoring the picture, a high density picture output device adds all the data in the fields F-1-F-8, thereby obtaining the high density still picture in the original data size.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a system for capturing, recording, and reproducing still images at high density.

[Prior art]

Conventionally, when capturing and recording still images with a high-resolution image sensor, etc. in a VTR, etc., the X (horizontal) of each field of the recorded image is
and the number of sampling pixels in the Y (vertical) direction increases,
For example, it is conceivable that it is substantially about 400 to 800 in the X direction and about 800 in the Yi direction.

[Problems to be solved by the present invention] 'However, since this method is different from the format of the current TV standard system (for example, NTSC system), the recording and playback method is different from the conventional system. There was a problem in that the compatibility of the -ware was lost and the conventional /\-ware could no longer be used.

The present invention has been made in view of the above-mentioned conventional problems, and is aimed at making it possible to record and play back particularly high-density still images using current TV standard system /\-ware. .

[Means to solve the problem]

When capturing and recording high-density still images with a high-resolution image sensor,
Each field was divided and recorded on a plurality of field screens in an offset relationship with each other at a density that was an integral multiple of the number of standard TV format samples.

[Effect]

By combining the recorded images as described above, it is possible to obtain high-density output, and also to form output in standard TV format, thereby achieving hardware compatibility.

〔Example〕

The present invention will be explained below based on examples.

FIG. 1 shows an embodiment of a still 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 effective number of scanning lines in the l field due to line interlacing is approximately 93% of the total number of scanning lines, and is 525XO, θ3/
2÷244, so in this example, the number of pixels in the Y direction is 244X4-9713, which is an integral multiple of the number of high-density still image samples, and the number of pixels in the X direction is the number of high-density still image samples. It has no direct relation to the compatibility of clothing, so the more the better, but here we will use the normal amount (:40
400X 4=1, Ei
Let it be OO.

The actual number of samples is determined by spatial offset dot sampling as shown in Figure 1.

The total number is 978/2X 11300/2 = 390,4
00, these image data are F-1 and F- in Fig. 2.
2... As shown in F-8, when divided into 8 fields, the data size of each field is 244 x 400 tonal, which is the format of the NTSC standard TV system, so it cannot be recorded using the same system. It can be recorded by a device such as a VTR.

To explain the division of each field in more detail, when the address of each pixel position in the X and Y directions is given by D (X, Y) coordinates in Figure 1, the assigned address of each field in Figure 2 is F -1; D(1,1), D(5,l), D(9,1)...D(
1597,1) DCl, 5), DC5,5), D(
9,5)...D(1597,5)D(1,973),
D(5,973), D(9,973)...D(159
7,973) F-2= D(3,3), D(7,3), D(11,3)...D
(1599,3)D(3,?),D(?, ?),D
(11,7)...[1(1599,7)D(3,97
5) , D(?,975), D(11,,975)...
・D(1599,975)F-3: D(2,・2), D(8,2), D(10,2)...
D(15138,2)D(2,8),D(f3.
fri, D(to, Ei)... D(1598,8
) [1(2,974) , D(8,974) , D(1
0,! 374)...[1(15H,!374)F-
4= D(4,4), D(8,4), 0(12,4)...
[11(1800,4)D(4,8),()(8,8)
, 1)(12,8)...DC1800,8)DC4
,9713), DC8,978), D(12,97B)
...D(IEIOo, 9713)F-5: D(3,1), DC? , l), D(11, l)...
・D(1599,1)D(3,5),D(7,5),
DCll, 5)...D(15!39.5)D
(3,973), D(7,973), D(11,9
73)... D(1599,973)F-6= D(1,3), D(5,3), D(9,3)... D
(1597,3)D(1,7),D(5,7),D(9
,7) River D(1597,7) D(1,975), D(5
,975), D(9,!375)... n(ts97
,87s) F-7: DC4,2), D(8,2), D(12,2)...
0(1600,2)D(4,8),0(8,8),[1
(12,e)...tll(1800,6)D(4,
9f39), D(8,989), D(12,91(9)
・D(1600,989)DC2,4),D(B,
4), D(10,4)... D(17118,97
8) D(2,8), D(Ei, 8), D(10,8
)... D(1798,a)D(2,!37B),D
(8,978), D(10,978)... D(15
98,978) When restoring an image from each image data recorded as described above, a high-density image output device is used to restore the image.
Add all field data of F-1 to F-8 (Σ
(F-i)), a still image of the original data size (Fig. 3(a)) is obtained, and for example, four fields F-1, F-2, F-5°F-6 By adding the above, a still image with a richness as shown in Fig. 3(b) is obtained, and since this image data is in the NTSC TV format, it can be monitored using the output device of the above standard format. be able to. Combining these field image data can be easily performed using a frame memory.

FIG. 3 shows a block diagram of a circuit according to an embodiment of the present invention. 1 is an image sensor, and uses a high-resolution sensor capable of divisional reading, such as a MOS type, bipolar type, or electrostatic induction type. When using a sensor that does not have a divided readout function, it can be supplemented by providing an external memory. Reference numeral 2 denotes a sensor readout timing generation section, which reads out each pixel (image data) in the order described above, and a signal processing section 4 which limits the band.

3 is a signal amplifier for the image sensor l. Since the output signal of the signal processing section 4 conforms to the format of the standard TV format, that is, the NTSC format in this embodiment, it is compatible and allows each field information to be recorded on the NTSC format VTR 5. is possible.

In playback mode, if the original NTSC specification image quality is sufficient, use the NTSC monitor TV6 as is.
When the original high-density image quality is required, the analog/digital converter 7 converts it into a digital signal, and the memory control section 9 and frame memory 8 are used to perform the divided reading. This output signal is converted into an analog signal by a digital-to-analog converter 10, and is displayed on a high-definition monitor T, for example.
A high-density, high-quality image can be reproduced by inputting the image to a high-definition output device 11 such as a high-definition printer.

〔effect〕

As explained above, according to the present invention, the currently used standard skewer T
Offset sampling is performed at a pixel density that is an integer of the number of samples in the V format, and the recording is divided into each field of the standard TV format.By combining these fields, high-density output equipment or standard TV It is now possible to output to any output device that conforms to the system format, making it possible to achieve hardware compatibility.

[Brief explanation of drawings]

FIG. 1 is an embodiment of the offset sampling format of still image data from a pixel element according to the present invention, FIG. 2 is an explanatory diagram of each divided field of the image data of FIG. 1, and FIG. 3(a), (b) is an example of combining the above-mentioned field data, and FIG. 4 is a circuit diagram of an embodiment according to the present invention. 1... Image sensor (high resolution image sensor) 2
...Sensor readout timing generation section 4...
...Signal processing unit 5...NTSC (current standard) TV system VTR6
...NTSC (current standard W, a) TV system monitor TV8 ...Frame memory 11 ...High-definition output device F-1, F-2 to F-8 ... ...Each division field Figure 4

Claims (1)

[Claims] When capturing and recording high-density still images with a high-resolution image sensor,
An image recording method characterized in that each field is divided and recorded on a plurality of field screens in an offset relationship with each other at a density that is an integral multiple of the standard TV method sample number.