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yiq color model in hindi in computer graphics

YIQ color model in hindi A tutorial by QuickCS What are we going to learn today? Today we will learn about: What is YIQ color model? What each component of YIQ consist of? How to convert from RGB to YIQ color model and Vice-versa? What is YIQ color model? YIQ color model is a color model used by American broadcasters for their signal format of NTSC(National television signal committee). This is because the signals cannot be sent in RGB format as RGB(Red, Green and Blue) require different signals but Television monitor uses a single composite signal. What each component of YIQ color model consist of? The Y component consist of The Luminescence. It means the Y component decides how much the brightness of the particular pixel position is going to be. How is this achieved? To achieve the luminescence from RGB, the red green and blue intensities are chosen to yield a standard luminosity curve. Since Y has luminescence, the black and white television selects only the Y component from YIQ signal. The I component The I component consist of orange cyan hue information. Basically it has the flesh tone shading information. The Q component The Q parameter carries Magenta green hue information. The Bandwidth occupied The Y parameter, since carries huge information about luminance hence the largest bandwidth of 4Mhz is assigned to it. The Parameter I occupies 1.5Mhz of bandwidth of the NTSC signal. Finally the Q parameter occupies 0.6Mhz of bandwidth. RGB to YIQ conversion The RGB signal has to be converted to YIQ before its transmission via NTSC signal. This is achieved with the NTSC encoder. The NTSC encoder modulates and superimpose the I and Q information on Y signal. And the formula to convert RGB signal to YIQ format is as follows: YIQ to RGB conversion To convert the YIQ signal to RGB format we use NTSC decoder which separates the YIQ signal information and then converts it into RGB values. This is done by inverse matrix transformation like this: