KR19990003327A - Basic element extraction device for three primary colors of illumination - Google Patents

Abstract

The present invention relates to an apparatus for extracting three primary colors of illumination which can accurately extract basic factors of three primary colors used in the three-color modeling of a given illumination. Receiving unit; A three-color separation filter which decomposes the three primary colors corresponding to the electric signals output from the light receiving unit; A first analog / digital converter for converting the red information (R) output from the three-color separation filter into a digital signal; A second analog / digital converter for converting the green information (G) output from the three-color separation filter into a digital signal; A third analog / digital converter for converting the blue information (B) output from the three-color separation filter into a digital signal; And a factor extracting unit for extracting the ratio of the three primary colors obtained by vector normalizing the digital signals of the red information, green information, and blue information output from the first, second, and third analog / digital converters, respectively, as basic factors of the three primary colors.

Description

Basic element extraction device for three primary colors of illumination

The present invention relates to a three-elementary color element extracting apparatus, and more particularly, to a basic element extracting apparatus for extracting a three-color elementary factor for three-color modeling of a predetermined illumination in a computer graphics application.

In computer graphics applications, lighting is one of the important factors that make the virtual space feel realistic. Therefore, it is necessary to accurately model the three primary colors of illumination used to make the virtual space more realistic. To do this, it is necessary to model the basic factors of the three colors of red (R), green (G) Factor. This is because the modeling is done by multiplying the basic three primary color factors set by the brightness level of the illumination by the same multiple.

However, in the graphics library of OpenGL which is used in the processing of existing computer graphics, the operator is required to directly define the basic factor information of the three primary colors, so in order to provide the correct basic parameters, it is necessary to input the basic factor information several times.

That is, in order to accurately set the basic R, G, and B values for the corresponding illumination, a combination process is performed for the input arbitrary R, G, and B information, and an arbitrary R , G, and B are accurate values, it is repeatedly performed to perform inefficient operation.

In addition, since the basic factor information for R, G, and B is determined by subjective evaluation of the operator, there is a high possibility that an error is included in the determined basic factor information unless the operator has a professional lighting sense. For this reason, when the determined basic factor includes an error, the three primary colors of the illumination are not accurately modeled, thereby reducing the reality in the virtual space.

It is an object of the present invention to provide an apparatus for extracting a three-primary-color basic factor of illumination capable of accurately extracting a basic factor of a three-color used in a three-color modeling of a given illumination.

According to an aspect of the present invention, there is provided an apparatus for extracting basic color factors of three primary colors used in modeling three colors of a predetermined illumination in processing a computer graphics application, A light receiving unit which receives light and converts the light into an electric signal; A three-color separation filter which decomposes the three primary colors corresponding to the electric signals output from the light receiving unit; A first analog / digital converter for converting the red information (R) output from the three-color separation filter into a digital signal; A second analog / digital converter for converting the green information (G) output from the three-color separation filter into a digital signal; A third analog / digital converter for converting the blue information (B) output from the three-color separation filter into a digital signal; And a factor extracting unit for extracting the ratio of the three primary colors obtained by vector normalizing the digital signals of the red information, green information, and blue information output from the first, second, and third analog / digital converters to the basic factors of the three primary colors. do.

1 is a block diagram of an apparatus for extracting three primary colors of illumination from illumination according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

100: Target illumination 110: Light receiving section

120: three-color separation filter 131 to 133: first to third analog / digital converters

140:

The above and other objects and advantages of the present invention will become more apparent from the following description of the preferred embodiments of the present invention with reference to the accompanying drawings, by persons skilled in the art.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an apparatus for extracting three primary colors of illumination according to the present invention. The apparatus includes a target illuminator 100, a light receiver 110 for receiving light emitted from the target illuminator 100, A first analog / digital converter 120 for converting the red information R output from the three-color separation filter 120 into a digital signal, A second ADC 132 for converting the green information G output from the three-color separation filter 120 into a digital signal, a three-color separation filter 120, A third ADC 133 for converting the blue information B outputted from the first to third ADCs 131 to 133 into a digital signal, a third ADC 133 for normalizing the digital values of the primary colors outputted from the first to third ADCs 131 to 133, The information extracting unit 140 extracts information .

The basic factor extracting apparatus for three-color modeling of the illumination configured as above is driven as follows.

First, the user sets the light 100 to be sampled at a position where the light receiving unit 110 can receive the light, and then turns on the corresponding light 100.

Accordingly, the light receiving unit 110 formed of the light receiving sensor capable of measuring the light amount measures the amount of light emitted from the target light 100, converts the measured light into an electrical signal, and outputs the electrical signal. The output value is transmitted to the trichromatic decomposition filter 120.

The three-color separation filter 120 separates R, G, and B colors from an electrical signal transmitted from the light receiving unit 110, and filters the separated signals. The three primary color separation filter 120 is configured to include a red filter (not shown), a green filter (not shown), a blue filter (not shown) and at least two mirrors, When an electrical signal is transmitted, it is transmitted to the corresponding mirror and filters. That is, the mirrors serve to refract the electrical signals transmitted through one transmission path so as to pass through the three filters, and each of the filters (not shown) passes only the corresponding color information among the transmitted electrical signals It plays a role. In other words, the red filter (not shown) only passes information on the red color of the electrical signal, the green filter (not shown) passes only the green color information, and the blue filter (not shown) Only information about the blue in the signal is passed.

The three primary colors outputted through the corresponding filters are transmitted to the corresponding ADCs 131 to 133, respectively. That is, the R color information output through the red filter (not shown) is transmitted to the first ADC 131, the G color information output through the green filter (not shown) is transmitted to the second ADC 132, The B color information output through the blue filter (not shown) is transmitted to the third ADC 133.

The first ADC 131 converts the applied red information R into a digital value by a conventional analog / digital conversion method and outputs the digital value. The second ADC 132 converts the applied green information G into a digital value by a conventional analog / digital conversion method and outputs the digital value. The third ADC 133 converts the applied blue information R into a digital value by a conventional analog / digital conversion method and outputs the digital value.

The digital values output from the first to third ADCs 131 to 133 are transmitted to the factor extraction unit 140, respectively.

When the R, G, B tri-color information is applied, the parameter extracting unit 140 extracts the normalized color vector .

[Equation 1]

Then, as shown in Equation 2 And detects the ratio between R, G, and B.

[Equation 2]

= 1

The ratio of detected R, G, B is a basic factor for RGB modeling of the target illumination 100. For example, when the ratio of detected R, G, and B is 0.7: 0.2: 0.1, the basic factor is (0.7, 0.2, 0.1). Accordingly, the parameter extracting unit 140 outputs the detected R, G, and B ratios as basic R, G, and B factor values to be used for three-color (RGB) modeling of illumination.

(R, G, B) values of the R, G and B ratios output from the factor extracting unit 140, for example, when the corresponding illumination is to be modeled at twice the brightness at the time of graphic processing, .

As described above, according to the present invention, in a computer graphics application, a basic factor used when an operator performs a three-color modeling of a desired illumination (illumination to be sampled) is extracted using light emitted from the corresponding illumination in the real world, A person who does not have a sense of knowledge or a special sense of illuminance has the effect of realizing realistic lighting in his or her graphic processing.

Although the present invention has been described in connection with the above embodiments, those skilled in the art will appreciate that various modifications and changes may be made without departing from the spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be determined according to the claims.

Claims (1)

An apparatus for extracting a basic factor of three primary colors used in modeling three primary colors for a predetermined illumination in processing a computer graphics application, A light receiving unit that receives the light when the predetermined illumination is turned on and converts the received light into an electric signal; A three-color separation filter which decomposes the three primary colors corresponding to the electric signals output from the light receiving unit; A first analog / digital converter for converting the red information R output from the three-color separation filter into a digital signal; A second analog / digital converter for converting the green information (G) output from the three-color separation filter into a digital signal; A third analog / digital converter for converting the blue information (B) output from the three-color separation filter into a digital signal; And And a factor extracting unit for extracting the ratio of the three primary colors obtained by vector normalizing the digital signals of the red information, green information, and blue information output from the first, second, and third analog / digital converters, respectively, Wherein the light source is a light source.