JPH0815004B2 - Variable color lighting system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable light color type lighting device used for lighting effects in an indoor facility such as a house or a store.

2. Description of the Related Art In recent years, with the widespread use of large-screen color TVs and videos, there has been an increasing interest in lighting in an AV environment for the purpose of producing effects such as enhancing the sense of presence when watching TV images. BACKGROUND ART Conventionally, in an indoor lighting facility such as a house or a store, when performing lighting production by colored light, three types of light sources (color lamps or white light) each having three primary colors of light, red light, green light, and blue light are provided. (With a color filter attached to the light source of the system), with regard to sound production, by automatically blinking them in correspondence with the strength and weakness (frequency) of the music and human voice, the colored light is linked with the music. Have been used to achieve this change. In addition, regarding the video effect, the RGB signal of the entire TV image,
A method of realizing color light corresponding to the average chromaticity of one TV image by mixing the above three types of color light with various light mixing ratios in correspondence with a luminance signal, and linking the color light with changes in the TV image. Has been used.

FIG. 5 is a block diagram showing a light color variable type illumination device used for conventional image effect illumination. In FIG. 5, 8 is an RGB signal output unit, 9 is a Y signal output unit, 10 is a light mixing ratio calculation unit, 11 is a dimming control unit, and 12 is a color light output unit. RGB
The signal output unit 8 extracts the RGB color signal of the display image from the color television, integrates the signal for each screen of the television image sent 30 images per second, obtains the RGB signal ratio in one image, and outputs it as a color signal. To do.

The Y signal output unit 9 takes out the Y signal of the color television image, averages each image, obtains the average luminance of the image in one image, and calculates the relative value (%) with respect to the maximum luminance that can be realized by the television as the luminance signal. Output as.

The light mixing ratio calculation unit 10 uses the color signals from the RGB signal output unit 8 and the luminance signal from the Y signal output unit 9 to generate three color lights (red light, green light) corresponding to the three primary colors of the light used for the light source of the lighting device. Calculate the appropriate mixed illuminance ratio of light and blue light). Dimming control unit
Reference numeral 11 sets the illuminance of each of the three light sources according to the illuminance ratio obtained by the light mixture ratio calculation unit 10. The color light output unit 12 is composed of light sources of three light colors (red light, green light, blue light) corresponding to the three primary colors of light, and these lights are mixed by a diffuser plate and have the chromaticity and illuminance specified previously. Outputs light.

Therefore, the chromaticity of the illumination light is a method in which the chromaticity is the average of one TV image.

Problems to be Solved by the Invention For example, in order for a cinema scope screen, which has a larger aspect ratio and spreads horizontally than a TV screen, to be more realistic, the effect of the image is not the main character itself but the main character. It is enhanced by reproducing the atmosphere of the place and background in the entire visual field including the peripheral visual field of the person watching the image. However, when the light color and illuminance of the lighting in the living room is set by linking with the color and brightness of the TV image in such a conventional variable light color type lighting device, it is possible to display 1 when the face is close up
The average chromaticity of an image is calculated to be closer to the skin color because the skin color of a person who occupies a large area of the image has a greater influence than the background color of the image. For this reason, the chromaticity of the illumination light in the living room is also linked to this, and becomes a color light close to the skin color. Therefore, for example, in the case of a person's scene against the background of the blue sky and the sea, not the blue of the sky or the sea, but the flesh-colored lighting of the person is reproduced and there is no relation to the background color of the image. There was a problem that the original effect of enhancing the feeling could not be obtained.

Means for Solving the Problems The present invention, in order to solve the above problems, a memory unit that captures an original image of a color television image, and a filter that removes a skin-colored portion such as a human face from the original image are provided, An image signal is generated by removing the skin color portion from the original image. Next, calculate the average chromaticity and brightness of the image excluding the skin-colored portion from the RGB signal and Y signal of the image excluding the skin-colored portion from the filter, and link with this to calculate the light color and illuminance of the lighting in the living room. Dimming control the level.

Effect The present invention makes it possible to easily set the chromaticity and illuminance of colored light corresponding to the color and brightness of an image excluding the skin-colored portion of a television image by the above-mentioned means, and to set the chromaticity and illuminance to three values according to the calculated light mixing ratio. By automatically mixing the light sources of different types, it is possible to change the illumination light in the living room in conjunction with the background portion of the television image.

Embodiment FIG. 1 is a block diagram showing an embodiment of a variable light color illumination device according to the present invention. In FIG. 1, 1 is a memory unit, 2 is a filter, 3 is an RGB signal output unit, 4 is a Y signal output unit, 5 is a light mixing ratio calculation unit, 6 is a dimming control unit, and 7 is a color light output unit. An embodiment according to the present invention will be described below with reference to FIG.

The memory unit 1 captures and stores an original image of a television image sent at 30 images per second. The filter 2 is a filter having a characteristic of detecting and removing a portion corresponding to a skin color such as a human face in one screen of an image. In this case, the literature (color converter and its application-measurement of memory color in color television-,
According to Masaho Sugimoto et al.), The flesh color in a color image is not the colorimetrically set chromaticity, but the memory color of the viewer (a color that is stored as a unique color for an object. Generally, color stimulus of light. Often stored in higher purity than normal color vision)
It is reported that the final color adjustment is done by. Therefore, the filter 2 has a characteristic of removing the skin color portion in the chromaticity range shown in FIG. 2 based on the stored color of the skin color of the color image.

One of the image signals output from the filter 2 is RGB
The other side of the signal output unit 3 enters the Y signal output unit. The RGB signal output unit 3 extracts the RGB color signal of the image from which the skin-colored portion is output from the filter 2 and integrates the signal for each television image sent 30 images per second to remove the skin-colored portion. The RGB signal ratio in one image is calculated and output as a color signal.

The Y signal output unit 4 takes out the Y signal of the image from which the skin color part is output from the filter 2 and averages it for each image to obtain the average luminance of the image in one image, and the maximum luminance that can be realized by the television. The relative value (%) with respect to is output as a luminance signal.

The light mixing ratio calculation unit 5 uses the color signals from the RGB signal output unit 3 and the luminance signal from the Y signal output unit 4 to generate three color lights (red light, green light) corresponding to the three primary colors of the light used for the light source of the lighting device. The appropriate illuminance ratio of light and blue light is calculated by the following procedure.

(1) RGB signal ratio Yr: Y output from the RGB signal output unit 3
The chromaticity of the television image with the skin color part removed is calculated from g: Yb by the following relational expression.

TV image chromaticity coordinates (x, y), TV receiver red emission chromaticity coordinates (xr, yr), TV receiver green emission chromaticity coordinates (xg, yg), TV receiver blue emission Chromaticity coordinates (xb, yb), and x = (Yrxr / yr ＋ Ygxg / yg ＋ Ybxb / yb) / (Yr / yr ＋ Yg / yg ＋ Yb
/ yb) y = (Yr + Yg + Yb) / (Yr / yr + Yg / yg + Yb / yb) (2) The illuminance level (E) of the illumination output corresponding to the luminance signal from the Y signal output unit 4 is calculated. Here, if the illumination light of the living room is changed in the range of 0 to 10001x when the brightness of the TV image changes from 0 to 100%, the illuminance level of the illumination with respect to the brightness signal (relative value) of the TV image is The relationship is as shown in FIG. (3) Calculate the appropriate light-mixing illuminance ratio of three light colors for realizing the illumination light having the chromaticity coordinates (x, y) and the illuminance value (E) calculated in (1) and (2) by the following relational expression. .

Chromaticity coordinates (x, y) of set color light, illuminance E 1x chromaticity coordinates of red light source (x′r, y′r), illuminance Er 1x chromaticity coordinates of green light source (x′g, y′g) , Illuminance Eg 1x chromaticity coordinates (x′b, y′b) of blue light source, and illuminance Eb 1x x = (Erx′r / y′r + Egx′g / y′g + Ebx′b / y′b) / ( Er / y'r + Eg / y'g + Eb
/ y′b) y = (Er + Eg + Eb) / (Er / y′r + Eg / y′g + Eb / y ′
b) E = Er + Eg + Eb The dimming control unit 6 sets the illuminance of each of the three light sources according to the mixed illuminance ratio obtained by the mixed light ratio calculation unit 5. The color light output unit 7 is composed of light sources of three light colors (red light, green light, and blue light) corresponding to the three primary colors of light, and these lights are mixed by a diffusion plate to have the chromaticity and illuminance specified previously. Outputs light. In this case, the range illuminated by the color light output unit 7 is a range including the peripheral visual field of a person who views a television image such as a wall around the television screen, but the installation position of the color light output unit 7, indirect / direct illumination, etc. The lighting method is not limited.

Here, in the present invention, the three light sources (red light source, green light source, and blue light source) of the color light output unit 7 are chromaticity (R = (0.67,0.33), G of the three primary colors of the television image determined by the NTSC system.
= (0.21, 0.71), B = (0.14, 0.08)) If a fluorescent lamp coated with a fluorescent substance that emits light is used, the chromaticity range of illumination light that can be realized by mixing three light colors is The chromaticity range is enclosed by the triangle in the figure. At this time, if the RGB signal ratio of the TV image with the skin-colored portion removed is 1: 1: 1 and the luminance signal is 60%, the three-color mixed illuminance ratio is Er: E.
g: Eb = 2001x: 2001x: 2001x, chromaticity of illumination light is P in FIG.
It becomes (0.24,0.17) shown by the point.

In the present embodiment, the light source of the color light output unit 7 is constituted by a fluorescent lamp coated with a fluorescent substance that emits light with the chromaticity of the three primary colors of the television image determined by the NTSC system, but the light source is not limited.

Further, in the present embodiment, the method of processing each image is adopted, but in order to shorten the processing time, a plurality of images can be processed in parallel at the same time.

EFFECTS OF THE INVENTION According to the present invention, it is possible to instantly realize illumination light that changes in association with the background color and brightness level of a color television image.
It has a great effect as an environment color lighting.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a light color shapeable illumination device according to the present invention, FIG. 2 is a graph showing a chromaticity range of a skin color removed by a filter, and FIG. 3 is a graph showing an example of correspondence between a luminance signal and an illuminance level. FIG. 4 is a chromaticity diagram showing a chromaticity range of illumination light, and FIG. 5 is a block configuration diagram of a conventional light color variable illumination device. 1 ... Memory section, 2 ... Filter, 3 ... RGB signal output section, 4 ... Y signal output section, 5 ... Mixing ratio calculation section, 6 ...
Dimming control unit, 7 ... Color light output unit, 8 ... RGB signal output unit, 9 ... Y signal output unit, 10 ... Mixing ratio calculation unit, 11 ...
Dimming control part, 12 …… Color light output part.

Claims (1)

[Claims] 1. A memory unit for loading an original image of a color television image, a filter for removing a skin-colored portion such as a human face from the original image, and R (red) and G for an image from which the skin-colored portion output from the filter is removed. RGB signal output section for extracting the (green) and B (blue) color signals, a Y signal output section for extracting the luminance signal, and a color signal and Y output from the RGB signal output section.
Three-color light (red light, green light, corresponding to the three primary colors of light used as the light source by inputting the luminance signal output from the signal output unit,
(Blue light), a light mixing ratio calculation unit for calculating an appropriate light mixing illuminance ratio,
From the dimming control unit that inputs the signal from the light mixing ratio calculation unit and sets the illuminance of the three color lights, and the color light output unit that mixes the three color lights and outputs the illumination light of the set chromaticity and illuminance. A variable light color illumination device characterized by being configured.