Improve perceptual video quality: Skin-tone macroblock detection

To improve the overall perceived quality of images that focus on human faces, skin-tone macroblock detection offers a low-complexity solution. This paper shows how different techniques can be implemented in order to increase accuracy and maintain HD channel density for real-time pre-processing of the ROI detection algorithm on TI’s DSPs, including the C674x DSP on TI’s DaVinci DM816x video processor. TI’s VTC demo offers the option of ROI H.264 encoding and a real-time visualization of ROI detection.