El modelo YIQ se usa en la transmision de imagenes en color para los sistemas de television NTSC.
La conversion RGB a YIQ se obtiene invirtiendo la matriz dada en la ecuacion (5).
El modelo YIQ fue disenado pensando en aprovechar que el sistema visual humano es mas sensible a cambios de luminosidad que a cambios de matices (hue) o cambios de saturacion.
Go to step 1 and transform C from RGB color space to YIQ
and estimation Y component.
Based on the above one can conclude that MIS and FO video scenes are most suitable for high definition YUV interface, while the SC, CTP, ColP and ST video scenes are equally well suited for both high and standard definition interfaces, while FC, ConP, SP and LCG video scenes would be more suitable for standard definition YIQ interface.
For a very vibrant synthetic video scenes, with high values of TA and SA (especially with high TA values) it was experimentally observed that there is no significant difference in subjective quality assessment score either using standard definition analog YIQ or high definition analog or digital YUV, as in both cases well observable impairments are caused.
Significant learning occurred for users of the Opponent, YIQ
, LAB, and HSV color models, and not for users of the RGB color model.
There are many color spaces, some are designed for computer graphics, such as YIQ, HSV, HIS and GLHS (generalized LHS) (AO Linmi, et al.
The conversion matrix to compute the YIQ values from the original RGB NTSC tristimulus values is given by:
Therefore, majority of color spaces (YCbCr, HSV, YUV, HSL, YIQ