JPH06268897A - Date display device - Google Patents

Abstract

PURPOSE:To make a picture easy to see by providing an object position discriminating circuit and a date position setting circuit to automatically change the display position of the date so that the date does not overlap the object. CONSTITUTION:The video signal picked up by a video camera 1 is inputted to an object position discriminating circuit 2. The, circuit 2 discriminates between the object and a background and sends the information to a date position setting circuit 3. The circuit 3 automatically sets such position of the date based on information from the object position discriminating circuit 2 that the date does not overlap on the object, and the information is set to a date generating circuit 4. The circuit 4 sends a date signal at this position to a date adding circuit 5, and the date signal is added to the video signal to display the date at the position other than the object. As the result, satisfactory photographing is performed without overlap of the date on the object during photographing of the video camera.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a date display device for a video camera, which is suitable for adding the date of photographing to a video signal.

[0002]

2. Description of the Related Art A video camera has a function of superimposing a date (year, month, day and time) at the time of shooting as a character signal on a video signal and displaying it on a screen. This is generally called an on-screen display or a superimpose function, and when the date is recorded together with the subject, it is convenient to know the date and time of shooting at a glance.

As a display device, for example, Japanese Patent Laid-Open No. 1-71
There is a display circuit shown in Japanese Patent No. 280.

As shown in this example, the prior art focuses on displaying the date and stabilizing the display, and does not consider overlapping of the subject and the date display.

[0005]

However, in the conventional date display device, since the display position is fixed,
The date sometimes overlapped on the subject that was shot.

It is an object of the present invention to provide an easy-to-see image by a date display device that automatically changes the display position of the date so that the date does not overlap the subject.

[0007]

In order to achieve the above object, means for discriminating a subject from a background and means for automatically setting the date display position to a position other than the subject based on the information are provided. Is displayed in a place other than the subject.

[0008]

The operation of the present invention will be described with reference to FIG. Figure 1
It is a block diagram of a date display device.

A video signal captured by the video camera 1 is input to the subject position discriminating circuit 2. Subject position discrimination circuit 2
Discriminates the subject and the background, and sends the information to the date position setting circuit 3. The date position setting circuit 3 automatically sets a position where the date does not overlap the subject based on the information from the subject position determination circuit 2 and sends the information to the date generation circuit 4. The date generation circuit 4 sends a date signal to the date addition circuit 5 at a position where the date does not overlap the subject and adds the date signal to the video signal to display the date at a position other than the subject.

[0010]

EXAMPLE An example of the present invention will be described with reference to FIG. FIG. 2 is a block diagram of a video camera system using the date display device of the present invention.

The video signal a from the video camera 1 is input to the subject position discriminating circuit 2. In the subject position discriminating circuit 2, the frame memory 6 and the comparing circuit 7 compare the video signal of one frame before and the current video signal to detect the motion, and the position having the level difference is taken as the subject and the subject position information b
Is output. The date position setting circuit 3 uses the subject position information a
Then, the optimum display position of the date is determined and the date position information c is output. The sync signal detection circuit 8 detects the reference sync signal d from the video signal a. The date timing control circuit 9 generates a timing signal e from the reference synchronization signal a and the date position information c from the date position setting circuit 3 and inputs it to the date generation circuit 4. At this time, if the date position automatic control switch 10 is off, the date position is fixed. If the date position automatic control switch 10 is in the ON state, the date position is automatically changed according to the date position information c so as not to overlap the subject. The date generation circuit 4 outputs the date signal f based on the timing signal a from the date timing control circuit 9 to the date addition circuit 5
To enter. The date adding circuit 5 adds the date signal f to the video signal a and inputs it to the monitor 11.

A specific example of the operation will be described with reference to FIG. Figure 3
Indicates a monitor. When the subject is in the position A, the date is displayed in the position C. When the subject moves from position A to position B, the date is automatically displayed at position D so that the dates do not overlap.

[0013]

According to the present invention, it is possible to take a good picture without imposing a date on the object during the picture taking by the video camera.

[Brief description of drawings]

FIG. 1 is a block diagram of a date display device according to the present invention.

FIG. 2 is a block diagram of a video camera system using a date display device according to the present invention.

FIG. 3 is a diagram showing an example of date display according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Video camera, 2 ... Subject position determination circuit, 3 ... Date position setting circuit, 4 ... Date generation circuit, 5 ... Date addition circuit, 6 ... Frame memory, 7 ... Comparison circuit, 8 ... Sync signal detection circuit, 9 ... Date timing control circuit, 10 ... Date position automatic control switch, 11 ... Monitor, a ... Video signal, b ... Subject position information, c ... Date position information, d ... Reference synchronization signal, e ... Timing signal, f ... Date signal, A, B ... Subject, C, D ... Date.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeaki Kanari 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Stock Information Company Hitachi Image Information Systems (72) Inventor Kazuhiro Ishikawa 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Hitachi Image Information System (72) Inventor Tetsuya Amano 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Stock Company Hitachi Image Information System (72) Inventor Minoru Kikuchi 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Hitachi Image In the information system

Claims (1)

[Claims] 1. A date display device for a video camera, wherein the date position is automatically changed by discriminating a moving subject so that the date does not overlap the subject.