JPS60141079A - Display device of zoomed-in picture of television camera - Google Patents

Abstract

PURPOSE:To allow easy recognition of a screen range (visual field) at the time of zooming-in during zoom-photographing for a photographer beforehand by overlapping an object image with a screen range (visual field) at the time of zooming-in on a view finder during zoom-photogrphing so as to display. CONSTITUTION:An image signal (a) obtained through a zoom lens is displayed on a view finder 2 as an object image through a mixer 1. A microcomputer 3 has a storage means which stores an output (d) from a zoom-in detector to detect information in correspondence to a zoom-in picture and a zoom-in visual field setting means which inputs an output of a storage means and vertical and horizontal synchronizing signals (b) and (c), sets a scanning range in correspondence to a picture range at the time of zooming-in and outputs an output permission signal (e). A gate circuit 5 passes a setting signal (f) in a range set by the output permission signal (e). This setting signal (f) is given to the mixer 1 as a zoom-in display signal (g), and mixed with the image signal (a) of a television camera. The screen range at the time of zooming-in is overlapped with an object image on the view finder 2 so as to display.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a zoom-in image display device for causing a view finder of a television camera having a zooming function to perform special imaging by making full use of a microcomputer.

With a television camera having a zooming function, the range (field of view) of the subject image on the screen can be variably controlled by changing the zoom position. Furthermore, during photographing, the subject image is displayed on the viewfinder, and the photographer can perform zoom photography while viewing this.

However, with a conventional video camera having a zooming function, when zooming in other than when zooming in (at the high-telephoto end), it was not possible to know the range of the screen displayed on the viewfinder when zooming in. For this reason, there was a drawback in that the screen range of the subject image displayed when zooming in had to rely solely on the photographer's experience and intuition.

This invention was made in order to overcome the drawbacks of the prior art.
f7. It is an object of the present invention to also provide a zoom-in image display device for an l-thio camera, which allows the range of music (world'!l'J') to be easily recognized in advance on a photographing stand.

In order to realize the object mentioned above, the present invention has the following advantages: When displaying the subject in the viewfinder, the current zoom position IlC is detected, and based on this, the screen range when zooming in is determined, and then
To provide a display device for a zoomed-in image of a hiteo camera, which displays a screen range of 11 o'clock and 12 o'clock by superimposing it on a subject image with a finder+.

An embodiment of the present invention will be described below with reference to accompanying illustrations and songs. FIG. 1 is a block diagram of an embodiment of a display device according to the present invention. The image of the television camera (ft (171)
The number, l is sent to the hue finder 2 via the mixer 1 ′j
- is displayed as the subject image. In addition, a vertical synchronization signal is emitted from a control circuit of a television camera (not shown), a horizontal synchronization signal No. 4.1c, 1lfj, and a zoom position signal as information corresponding to a zoomed-in image is emitted from a detection device (not shown) of a 11-in detection device. d is given to the microcomputer 3. Here, the microcomputer 3 has a storage means for roughly storing the screen range at the time of zooming in on the viewfinder 2 corresponding to the zoom position, and is operated by switching the display selection switch 4 operated by the photographer. Further, the microcomputer 3 outputs a signal related to the scanning range of the electronic beam corresponding to the screen range at the time of zooming in as an output permission signal e using the step t1 in field of view setting means, for example, Δ
It is connected to one input terminal of the gate circuit 5 consisting of an N+) circuit.

A setting signal f for zooming and displaying the screen range at 12 o'clock, which is generated from a control circuit (not shown), is applied to the other input terminal of the game 1 circuit 5. And, K1-Circuit 5
passes the setting signal f within the range set by the output permission signal e and supplies it to the mixer 1 as the zoom-in display signal g. Since the mixer 1 mixes the video signal a of the television camera and the zoom-in display signal g, the image signal a and the zoom-in display signal g are mixed in the viewfinder 2 so that they are displayed in the viewfinder 2 (J zoom-in screen range or overlapping the subject image = l'J:).

Figures 2 to 4 are explanatory diagrams of the display on the view finder 2.
The figure shows how the screen range (field of view) 13 when zoomed in is displayed in conjunction with the body image. The figure shows the trajectory H of the electron beam in Figure 2. In Figure 4, when the horizontal scanning line is set to 11 and the scanning time is set to L, the four vertices of the rectangular visual field ■3 are shown. Or (n
z, t-1), (old, t;:z), (11,!, l
;1 ), (11, L2). In this way, in order to display the screen range when zooming in, it is necessary to scan 1r time 1 for horizontal scanning lines Ill to +12;
1= L:=, interval, soo l\in display signal g
It can be seen that this must be added to mixer 1. Therefore, the output permission signal e given from the microcomputer 3 to the goo 1 circuit 5 is
1! The scanning time is not limited to the period 1 to L2 (
It turns out that J is not possible.

FIG. 5 is a flowchart 1- of the operation of the microcomputer 3. First, when the control processor t\ starts, it reads the position signal d of Sue 11 (block 100), calculates the horizontal scanning line number I14, 1, which corresponds to the information about the screen range at the time of zooming in, which is stored in advance.
12 and horizontal constant press time 1. Insert L2 (block 2
00). Then, an output permission signal e is issued within that range (blocks 300 to 5 (10)).

Here, in relation to rl and t, ■1 is fixed and [ changes, Il:Il:,! , l;=12, the count is reset (block 600) and the program repeats.

In this way, the screen range at the time of zooming in can be confirmed on the viewfinder 2 in cases other than when zooming in.

According to the present invention, the subject image and the screen range at the time of zooming in can be superimposed and displayed on the viewfinder during zoom shooting, so the photographer can easily recognize the field of view at the time of zooming in. In addition to improving the efficiency of zoom shooting, we have developed a display device for zoomed-in images of television cameras that can be used for shooting with high visual effects.
1) Can.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of a suite image display device for a television camera according to the present invention, and Figs. Yes, Fig. 2 shows the image range when zoomed in when the image is focused on an arbitrary subject image, Fig. 3 shows the image range when zooming in, and Fig. 4 shows the image range at scanning line 2. 1, and FIG. 5 is a flowchart 1- showing an example of the operation of the micro combi coater shown in FIG.
To K-1, circuit 1, image signal of the To-Telehi camera, 1) redirection synchronization signal, C...horizontal synchronization signal, zoom-in display signal with I. Figure 1 Figure 4

Claims (1)

[Scope of Claims] A storage means for storing an output from a zoom-in detection device that detects information corresponding to a zoom-in image, and an image when zoomed in by inputting the output of the storage means and vertical and horizontal synchronization signals of a television camera. a zoom-in field-of-view setting means for setting a scanning range corresponding to the range; a gate circuit for manually inputting the output of the zoom-in field-of-view setting means and the output from the control circuit obtained when zoom-in is necessary, and outputting a zoom-in display signal; a mixer which obtains an output to a viewfinder that superimposes the image range at the time of zooming in on the imaging range bounded by the video signal and displays the image range by mixing the output of the gate circuit with the video image of the television camera; An 11-in image display device for a television camera, characterized in that f(t!) is obtained.