JPH10276444A - Television camera apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily visually distinguish the part of object effected by a flesh tone DTL signal by displaying object areas corresponding to respective hues while intensifying them in respectively different colors. SOLUTION: When a control signal 15 is a value '1', namely, when gate signals from hue arithmetic processing circuits 11 and 12 are inputted, corresponding to the respective gate signals, an adder circuit 8 outputs a video signal intensified in the selected color of object such as in green, for example, by the gate signal from the hue arithmetic processing circuit 11. Besides, based on the gate signal from the hue arithmetic circuit 12, a video signal is outputted while being intensified in the selected color of object section such as in red, for example. Thus, the respective gate signals are added to the R, G and B components of video signal, for example, one by one without being overlapped and a function for respectively displaying the areas in colors different from object sections corresponding to the respective gate signals can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for selecting a plurality of hues and displaying the selected hue of a subject portion by emphasizing each of the hues with a different color. The present invention relates to a television camera having a function of generating a video signal.

[0002]

2. Description of the Related Art As a conventional technique, a document describing a television camera having a function of controlling a level of an outline emphasizing signal for a selected hue, for example, "1.
Proceedings of the 994 Annual Conference of the Institute of Television Engineers of Japan, ”Published by The Institute of Television Engineers of Japan (ITE), pp. 459-
As shown on page 460, a contour enhancement signal applied to a subject portion having a hue within a predetermined hue range having a hue adaptive correction circuit is compared with a subject portion having a hue outside the above range. Some television cameras have made it possible to emphasize or not to emphasize.

[0003]

In the prior art described above, when controlling the contour correction amounts of two or more selected hue ranges, the range of the imaging position of the subject portion for each of the plurality of hue ranges is controlled. However, there is a disadvantage that it is difficult for the operator to distinguish on the display screen.

The present invention has been developed to eliminate the aforementioned disadvantages.
A display signal (hereinafter referred to as a gate signal) corresponding to each selected hue range is generated, and this gate signal is added to the R (red), G (green), and B (blue) components of the video signal. Accordingly, it is an object of the present invention to realize a television camera having a function of enabling an operator to display an imaging range according to the subject portion in different colors.

[0005]

According to the present invention, there is provided a television camera apparatus comprising a DTL signal generating circuit for generating a DTL (contour emphasis) signal from a video signal output from an image pickup device. A plurality of hue operation processing circuits for detecting a hue range from the video signal and outputting a gain control signal and a gate signal for controlling the gain of the DTL signal in accordance with the video signal in the predetermined hue range, respectively. According to the gate signal, of the video signals, the video signal portions corresponding to the respective predetermined hue ranges are gated and displayed in different colors.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. This embodiment will be described for a case where there are two hue operation processing circuits.

FIG. 1 is a diagram showing an example of a block configuration of a television camera using the present invention. In FIG. 1, light obtained from a zoom lens 1 becomes a video signal by an image sensor 2 and a signal a amplified by a preamplifier 3. The signal a becomes the R, G, B video signal c digitized by the A / D converter 4. This signal c is D
H.TL signal is input to a TL signal generation circuit 5 and is converted into a waveform of only an outline portion here. DTL signal; DTL signals are input to the DTL signal gain control circuit 6. The gain control circuit 6 receives a gain control signal, which is an output from a hue operation processing circuit 11 or 12, which will be described later.
The gains of the two selected “hue contour enhancement signals” (hereinafter referred to as “fresh tone DTL signals”) are each set to any value in the range of 0 to 2.0 or more.

Further, the gain of all hues, which is the gain in the DTL signal gain control circuit 6, is 0
The value is set to any value in a range from 1.0 to 1.0. The gain according to the gain control signal from the DTL gain control signal generation circuit 13 is multiplied by the gain of all hues to obtain a DTL gain in which all hues are level-adjusted. A certain H. DTL, V.A. DTL signal is multiplied,
The processed signal is output to D / A converter 7. D
The / A converter 7 converts the digitized DTL signal output from the DTL signal gain control circuit 6 into an analog DTL signal and outputs the analog DTL signal to the addition circuit 8. Here, the output a of the preamplifier 3 is output to the addition circuit 8, and D /
After the DTL signal output from the A-converter 7 is added, the DTL signal is output to the video signal processing circuit 9. The output of the addition circuit 8 becomes a video main line output signal 10 after the level adjustment and the like is performed in the video signal processing circuit 9, and is output to a subsequent stage (not shown).

Next, an output c of the A / D converter 4 is input to a hue operation processing circuit 11. Hue operation processing circuit 1
In step 1, after detecting an arbitrary hue range from the input R, G, and B video signals, a gain control signal corresponding to the gain value of the hue range is output to the DTL gain control circuit 6. Further, the output c of the A / D converter is input to the hue operation processing circuit 12, and the same processing as the processing in the hue operation processing circuit 11 is performed. However,
The target hue is different. And the hue operation processing circuit 12
Outputs a gain control signal in the same manner as described above.

The hue calculation circuits 11 and 12 have a block configuration as shown in FIG. 3 as in the prior art.
Each of the fresh tone gate circuits outputs a gate signal representing a timing corresponding to a video signal timing of a subject portion having a hue within the set hue range. This gate signal is AND
Input to the gate circuits 13 and 14. The control signal 15 is input to the AND gate circuits 13 and 14.
The control signal 15 becomes, for example, a value “0” during normal operation, and becomes, for example, a value “1” when the operator adjusts the fresh tone DTL and confirms the subject area in which the DTL correction amount is controlled by the fresh tone DTL. Become.

The AND gate circuits 13 and 14 output a fixed value "0" when the control signal 15 is, for example, a value "0", and receive an input when the control signal 15 is, for example, a value "1". Output the gate signal. The output signals are both input to the adder 8. Therefore, during normal operation, a signal of a fixed value “0” is input to the adder circuit 8 from the AND gate circuits 13 and 14, and when the subject area is confirmed,
The gate signals output from the hue operation processing circuits 11 and 12 are input to the addition circuit 8, respectively.

When the control signal 15 has the value "1", that is, when the gate signals from the hue calculation processing circuits 11 and 12 are input, the addition circuit 8 performs the hue calculation according to the respective gate signals. Depending on the gate signal from the circuit 11, the color of the selected subject portion is output, for example, a video signal in which green is emphasized. Also, depending on the gate signal from the hue operation circuit 12, the color of the selected subject portion is
For example, it outputs a video signal in which red is emphasized.

By doing so, in a television camera having a function of selecting two or more types of hues and controlling the level of an edge enhancement signal only for the hues, each gate signal is output to, for example, an image. R, G,
It is possible to realize a function of adding the B components one by one without duplication, and displaying each in a different color from the subject portion according to each gate signal.

Here, the case where two hue operation processing circuits are provided has been described as an embodiment. For example, a DTL gain control circuit having three hue operation processing circuits and three input terminals according to this embodiment is described. With the signal generation circuit, the subject portions corresponding to the three types of gate signals can be displayed on the screen.

In this embodiment, only the DTL signal is digitally processed, D / A converted and mixed with the video signal, and the gate signal is also an analog signal.
Although an example of mixing with a signal is given, it is also possible to perform digital signal processing on a video signal, a DTL signal, and a gate signal, and to mix with a digital signal.

[0016]

According to the present invention, when the contour correction control amount for two or more selected hues is changed as compared with the other hues, the subject areas corresponding to the respective hues are emphasized with different colors. With such a configuration, it is possible to easily identify where in the subject the fresh tone DTL signal is effective.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing an output waveform of a DTL gain control signal generation circuit.

FIG. 3 is a diagram illustrating an example of a block configuration of a hue operation processing circuit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Zoom lens, 2 ... Image sensor, 3 ... Preamplifier, 4
... A / D converter, 5 ... DTL signal generation circuit, 6 ... D
TL signal gain control circuit, 7: D / A converter, 8: addition circuit, 9: video signal processing circuit, 10: video main line output signal, 11, 12: hue operation processing circuit, 1
3, 14 ... AND gate circuit, 15 ... Control signal.

Claims (1)

[Claims] 1. A television camera device having a function of selecting two or more types of hue ranges and independently controlling the level of an edge enhancement signal for each of the hue ranges. The subject part of the range
A television camera device that generates video signals that are displayed by being gated in different colors.