JPS62193379A - Scanning converting system - Google Patents

Abstract

PURPOSE:To make it possible to obtain a clear image by storing data alternately in two memory circuits in unit of scanning of an infrared camera and reading and scanning following the procedure. CONSTITUTION:In the first frame, an address of a write address counter 1-6 is impressed to a memory circuit 1-1 through a switching circuit 1-4, and video data corresponding to the address is stored in the memory circuit 1-1. At this time, an address of a read address counter 1-7 is impressed to a memory circuit 1-2 through a switching circuit 1-5, and video data of preceding frame stored in the address are read out and outputted to a television 4 through a switching circuit 1-3. In the next frame, an address of the write address counter 1-6 is impressed to the memory circuit 1-2 through the switching circuit 1-5, and video data corresponding to the address are stored in the memory circuit 1-2. At this time, an address of a read address counter 1-7 is impressed to the memory circuit 1-1 through a switching circuit 1-4 and video data of preceding frame stored in the address are read out and outputted to the television 4 through the switching circuit 1-3.

Description

[Detailed Description of the Invention] [Summary] The present invention provides a scan conversion means for converting scans in an infrared imaging device, which includes two memory circuits, a ROM that stores the readout order of the memory circuits, and a connection between the two memory circuits. Data is stored in both memory circuits alternately in each scanning unit of the infrared camera, and data is read out and scanned according to the procedure, making it possible to obtain clear images.

[Industrial application field]

The present invention relates to a scanning line number conversion method, and more particularly to a scan conversion method for converting scanning in an infrared imaging device to television scanning.

Recently, infrared imaging devices have been widely used to measure the temperature of objects. On the other hand, television devices have become extremely popular, and there are two methods: one is to display the measured temperature pattern on a television screen for visual observation, and the other is to record the temperature pattern in a photograph, which has been adopted in the past.

Therefore, there is a need for a scan conversion method suitable for both visual viewing and photography.

[Conventional technology]

Conventionally, the number of scanning lines of an infrared imaging device is defined by the number of sensing elements, for example 120. Interlaced scanning is performed using 120 lines per field to create 240 scanning lines per frame, and the number of scanning lines is almost doubled electrically to match the 525 lines of television scanning. It uses a scan conversion method that allows it to be displayed on a television. Of course, the conventional method has no problem when recording measured infrared images as photographs.

However, this conventional scan conversion method poses a problem when displaying on a television screen for viewing. below,
The problem will be explained using FIG.

Assume that the object to be measured moves during interlaced scanning. Figure 4 (8) shows the scanning state before scan conversion, and shows that the object marked with a circle has moved to the mark with an X during interlaced scanning. The scan-converted version of this is shown in Figure 4 (
b). When this scan is displayed on the TV screen, the scans on the TV are A-1, A-2, 8-3, and then 8-1.
B-2 and B-3 are displayed, and the image is displayed as shown in Fig. 4 (C).
(indicated by dotted line). In other words, the image becomes blurred and looks like waves.

[Problem that the invention seeks to solve]

The above-described conventional scan conversion system has the problem that when attempting to view an image on a television screen, the object, that is, the peripheral part of the image moves and breaks into waves, making it impossible to obtain a clear image.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional situation, it is an object of the present invention to provide a scan conversion method that allows clear images to be obtained regardless of visual display or photographic recording.

[Means for solving problems]

In the present invention, as shown in FIG. 1, the scan conversion means 1 of the infrared imaging device is connected to the storage circuit 1-1. L2 and memory circuit L-L
A switching circuit 1- that switches the connection between the ROM 1-8 that stores the read procedure of L-2 and both memory circuits 1-LL-2.
3 and a memory circuit 1-1.1-2 for each scanning unit of the infrared camera 2.
Switching circuit 1-4 for switching the write/read read address of
．． It consists of 1-5.

[Effect]

The video signals created by the infrared camera 2 are stored in the storage circuit 1-1.1-2 by the switching circuit 1-4.1-5 in scanning units.

The number of scanning lines is doubled by reading each address of the memory circuits 1-1 and 1-2 twice.

At this time, the switching circuit 1-3 switches the connection to the other memory circuit when reading from one memory circuit is completed. When it is desired to obtain visual data or photographic data, the address of the storage circuit is controlled based on instructions from ROM L8 that stores the readout procedure.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the present invention, in which the video signal of the infrared camera 2 is sent to the A/D converter 3 (the number of scanning lines is n in synchronization with the scanning of the infrared camera 2). is input. The digitized data is input to the scan conversion means 1, converted into a television format with twice the number of scanning lines n, and displayed on the television 4.

The scan conversion means 1 includes i and q circuits (frame memories) 1-1.1-2 and storage circuits 1-1.1 for storing data.
-2 switching circuit 1-3, and an address indicating the write address of memory circuits 1-1 and 1-2.
Counters 1-6 and an address indicating successive addresses.
A counter 1-7, a ROM 1-8 that stores the procedure for reading, and a switching circuit 1-4.1-5 that switches between writing and reading from the memory circuit 1-L L2.
It is made up of.

The clock that drives the read address counters 1-7 is a high-speed clock that is synchronized with the scanning of the television, and the clock that drives the write address counters 1-6 is a low-speed clock that is synchronized with the scanning of the infrared camera 2. .

In the first frame, write address counter 1
-6 address passes through switching circuits 1 to 4 to memory circuit 1-
1 is applied, and video data corresponding to the address is stored in the storage circuit 1-1. Also, at this time, memory circuit 1-
2, the address of the read address counter 1-7 is applied through the switching circuit 1-5, and the video data of the previous frame stored at that address is read out and output to the television 4 through the switching circuit 1-3. Ru.

When the next frame arrives, the write address counter 1-
6 address is transferred to memory circuit 1-2 through switching circuit 1-5.
is applied to the address, and video data corresponding to the address is stored in the storage circuit 1-2. Also, at this time, the address of the read address counter 1-7 is applied to the memory circuit Ll through the switching circuit 1-4, and the video data of the previous frame stored at that address is read out.
It is output to the TV 4 through.

Scan conversion is performed by repeating the above sequence, and these switching circuits l-3, 1-4,
The switching sequence 1-5 and the read procedure (scan conversion read address) are stored in the ROM 1-8.

Note that the read address for scan conversion is the successive counter 1-
Apply the address generated by 6 to rlOMl-8;
Address conversion is performed according to instructions from ROM1-8.

The interlaced scanning readout procedure will be explained with reference to FIGS. 2 and 3.

Figure 2 shows the case of obtaining photographic data, and the data in memory circuits 1-1 and 1-2 in Figure 2(a) are stored in Figure 2(f).
The image is read out according to the procedure of d), and the result shown in FIG. 2(b) is obtained, which is an image corresponding to an expanded version of the original image.

Figure 3 shows the case where you want to obtain visual data.
As shown in FIG. 3(b), the data shown in FIG. 3 is read twice, one at a time. As a result, the visual data becomes a clear image of the peripheral part without waving, as shown in FIG. 3(c), even if the object moves during interlacing, considering the afterimage property of the eye.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a clear image can be obtained even if scan conversion is performed, and the present invention can be applied to an infrared imaging device and has extremely effective effects.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of photographic data of the present invention, FIG. 3 is an explanatory diagram of visual data of the present invention, and FIG. 4 is a diagram of visual data according to the conventional method. It is an explanatory diagram. In the figure, 1 is a scan conversion means, 1-1 and 1-2 are storage circuits, 1-3 is a switching circuit, and 1-8 is a ROM. 2 to i do'e 44 thoughts = 4 (Chi 7's words t 3 million Kei ha 182
Figure (O) (b)

(C) Explanation of draft F3J4n non-standard % (G) (b) (C)
Pure method 1 to 5g hard day to kill Mingguchi Figure 4

Claims (1)

[Claims] A scan conversion means (1) for converting the scan of an infrared imaging device that performs interlaced scanning, two storage circuits (1-1, 1-2) for storing video data, and the storage circuits (1-1, 1-2) for storing video data.
1-2) and a switching circuit (1-3) for switching the connection between the two memory circuits (1-1, 1-2), A scan conversion method characterized in that video data in scanning units is alternately stored in a circuit, and the data is read out from both storage circuits a plurality of times within the same screen according to the procedure and the number of scanning lines is converted.