JP3739066B2 - Television camera device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention has a function of generating a video signal for selecting a plurality of hues and emphasizing them with different colors for each hue when displaying a subject portion having the selected hues. The present invention relates to a television camera.
[0002]
[Prior art]
As a conventional technique, a document describing a television camera having a function of controlling the level of an edge enhancement signal with respect to a selected hue, for example, “1994 Television Society Annual Conference Proceedings Collection” Television As shown in pages 459 to 460, published by the Institute of Image Information and Television Engineers, a contour enhancement signal applied to a subject portion having a hue adaptive correction circuit and having a hue within a predetermined hue range There is a television camera that can be emphasized more or less than a subject portion having a hue outside the above range.
[0003]
[Problems to be solved by the invention]
In the above-described prior art, when controlling the contour correction amount 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 distinguished on the display screen by the operator. There is a drawback that it is difficult.
[0004]
In order to eliminate the above-described drawbacks, the present invention generates a display signal (hereinafter referred to as a gate signal) corresponding to each selected hue range, and uses this gate signal as R (red) of the video signal. An object of the present invention is to realize a television camera having a function capable of displaying an imaging range corresponding to the subject portion in a different color to an operator by adding to G, G (green), and B (blue) components. .
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a DTL signal generation circuit that generates a DTL (contour emphasis) signal from a video signal output from an image sensor in a television camera device, and detects a hue range from the video signal. And a plurality of hue calculation processing circuits that output a gate control signal and a gain control signal for controlling the gain of the DTL signal in accordance with a video signal in a predetermined hue range, respectively. Among them, the video signal portions corresponding to the predetermined hue ranges are gated and displayed in different colors.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS. In this embodiment, a case where there are two hue calculation processing circuits will be described.
[0007]
FIG. 1 is a diagram showing a block configuration example of a television camera using the present invention. In FIG. 1, the light obtained from the zoom lens 1 becomes a video signal by the image sensor 2 and further becomes a signal a amplified by the preamplifier 3. The signal a becomes an R, G, B video signal c digitized by the A / D converter 4. This signal c is input to the DTL signal generation circuit 5 where the waveform of only the contour portion is obtained. DTL signal and V. These become DTL signals, and these 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 the hue calculation processing circuits 11 and 12, which will be described later. In accordance with this signal, two types of “hue outline emphasis signals” (hereinafter referred to as fresh) are selected. The gain of the tone DTL signal) is set to any value in the range of 0 to 2.0 or more.
[0008]
Furthermore, the gains of all hues, which are the gains in the DTL signal gain control circuit 6, are set to any value in the range of 0 to 1.0 or more. Then, the gain corresponding 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 that is level-adjusted for all hues. Further, the output of the DTL signal generation circuit 5 H. DTL, V.I. The DTL signal is multiplied and the processed signal is output to the D / A converter 7. The D / 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 adder circuit 8. Here, the output a of the preamplifier 3 is output to the adder circuit 8, and the DTL signal which is the output of the D / A converter 7 is added to the adder circuit 8 and then output to the video signal processing circuit 9. The output of the adder circuit 8 is subjected to level adjustment or the like by the video signal processing circuit 9 and then becomes the video main line output signal 10 and is output to the subsequent stage (not shown).
[0009]
Next, the output c of the A / D converter 4 is input to the hue calculation processing circuit 11. The hue calculation processing circuit 11 detects an arbitrary hue range from the input R, G, and B video signals and then outputs a gain control signal corresponding to the gain value of the hue range to the DTL gain control circuit 6. Further, the A / D converter output c is input to the hue calculation processing circuit 12 and the same processing as the processing in the hue calculation processing circuit 11 is performed. However, the target hue is different. The hue calculation processing circuit 12 outputs a gain control signal in the same manner as described above.
[0010]
The hue calculation processing 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 a set hue range. This gate signal is input to AND gate circuits 13 and 14, respectively. A control signal 15 is input to both the AND gate circuits 13 and 14. The control signal 15 is, for example, a value “0” during normal operation. For example, when the operator adjusts the fresh tone DTL and confirms a subject area in which the DTL correction amount is controlled by the fresh tone DTL, the control signal 15 is, for example, a value “1”. Become.
[0011]
The AND gate circuits 13 and 14 output a fixed value “0” when the control signal 15 has a value “0”, for example, and input gate signals when the control signal 15 has a value “1”, for example. Is output. Both output signals are input to the adder circuit 8. Therefore, a signal of a fixed value “0” is input from the AND gate circuits 13 and 14 to the adder circuit 8 during normal operation, and the gate signals output from the hue calculation processing circuits 11 and 12 are respectively checked when the subject area is confirmed. Input to the adder circuit 8.
[0012]
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 adder circuit 8 outputs from the hue calculation circuit 11 according to each gate signal. For example, a video signal in which the color of the selected subject portion is emphasized, for example, is output. Further, depending on the gate signal from the hue calculation circuit 12, a video signal in which the color of the selected subject portion is emphasized, for example, red is output.
[0013]
By doing so, in a television camera having a function of selecting two or more hues and controlling the level of the edge enhancement signal only for the hues, each gate signal is, for example, R of the video signal. , G, and adds one by one without overlapping the B component, the ability to view each object part corresponding to each of the gate signals with different colors can be realized.
[0014]
Here, the case of having two hue calculation processing circuits as an embodiment has been described, but for example, a DTL gain control signal generation circuit having three hue calculation processing circuit portions and three input terminals in this embodiment. If so, the subject portions corresponding to the three types of gate signals can be respectively displayed on the screen.
[0015]
In the present embodiment, only the DTL signal is digitally processed, mixed with the video signal after D / A conversion, and the gate signal is also an analog signal mixed with the video signal and the DTL signal. Video signals, DTL signals, and gate signals can be digitally processed and mixed with digital signals.
[0016]
【The invention's effect】
According to the present invention, when the contour correction control amount is changed in comparison with other hues for two or more selected hues, the subject areas corresponding to the hues can be highlighted and displayed with different colors. Thus, it is possible to easily identify where the fresh tone DTL signal is effective in the subject.
[Brief description of the drawings]
FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention.
FIG. 2 is a view showing an output waveform of a DTL gain control signal generation circuit.
FIG. 3 is a diagram illustrating a block configuration example of a hue calculation 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 ... DTL signal gain control circuit, 7 ... D / A converter, 8 ... Adder circuit, 9 ... Image signal processing circuit, 10... Main line system output signal, 11, 12... Hue calculation processing circuit, 13, 14... AND gate circuit, 15.

Claims (1)

In a television camera device having a function of controlling the level of a contour enhancement ( DTL ) signal for a predetermined hue, a DTL signal generation circuit that generates a contour enhancement signal from a video signal output from an image sensor, and the video signal 2 or more types of predetermined hue ranges are detected, and a gain control signal for controlling the gain of the corresponding edge emphasis signal in accordance with each detected video signal in the predetermined hue range and each detected predetermined hue range A plurality of hue calculation processing circuits for outputting a gate signal indicating that the video signal is a video signal, and an addition circuit for adding the gain-controlled contour enhancement signal to the video signal, and controlling the contour enhancement signal level When the subject area is confirmed, the gate signal output from each hue calculation processing circuit is input to the addition circuit, A television camera apparatus, characterized by being added to a video signal portion in a predetermined hue range and displaying a subject portion corresponding to each of the gate signals in different colors .

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