Adaptive color conversion algorithm to achieve both high brightness and wide color gamut
We present a new color conversion algorithm for the new projector with the forth liquid crystal panel which controls the yellow light separately from RGB lights of the three-LCD system. This algorithm controls the volume of yellow light and corrects distorted color based on image analysis, and thus achieves high brightness and wide color gamut.
Color‐tuning projection system for adaptive combination of high brightness and wide color gamut
Abstract— The demand for projectors with high brightness and wide color gamut has been increasing; however, UHP lamp projectors cannot deliver those two qualities efficiently and simultaneously because of its color‐separation system. The newly developed projection system — “Color‐Tuning Projection System” — realizes the adaptive combination of high brightness and wide color gamut with one projector. This projector features a fourth liquid‐crystal panel — “Color Tuner” — with a 3LCD optical engine, which controls yellow light separately from the RGB light of a UHP lamp. This color‐tuner‐based optical engine — “Color‐Tuning Optical Engine” — and a new color‐conversion signal‐processing algorithm — “Adaptive Color Conversion Algorithm” — controls the yellow‐light volume and corrects color‐shifted pixels according to the brightness and chromaticity analysis of the input image, key technologies of the Color‐Tuning Projection System. This additional panel system enables the projector to ach ieve up to 115% higher brightness and 120% wider color gamut according to the input image. This paper presents an innovative design concept, a novel technology regarding brightness and a color‐gamut conversion projection system, and the characteristics of the prototype.
Police and Political Violence in the 1960s and 1970s: Germany and Italy in a Comparative Perspective
Notwithstanding the significant differences between the German and Italian police models (federal and civil vs. centralised and militarised), in both countries the confrontation with the protest movements of the 1960s and 1970s had a profound impact on police conceptions and public order strategies. Police forces in some German federal states (West Berlin) followed a hard line until the late 1960s, while in others (Munich, Hamburg) reforms to the Weimar-centred police intervention tactics took place beginning in the early to mid-1960s. In Italy, traditional police conceptions and strategies remained largely unchanged and re-emerged in 1968. Here, a movement from within the police led to the demilitarisation and unionisation of the state police in 1981. In both countries, fighting left-wing terrorism in the 1970s stimulated technical modernisation and enhanced the centralisation of the police. In critical response to police tactics, in the late 1970s Germany police matters were increasingly perceived as a concern not only of the state but of civil society—even if policing remained a highly contested terrain. In Italy, such matters largely remained state concerns in which only politicians and internal security specialists were entitled to intervene.