P-177: An Adaptive Image Enhancement Architecture for Mobile System

Abstract

We have developed an adaptive image enhancement architecture composed of new algorithm and new circuit for mobile system. The algorithm utilizes the scene change detection and realizes flicker-less enhancement of video images by a time-domain filter. The circuit is built in the LCD driver and enables real time enhancement of QVGA 30fps images with only 2.5mW power consumption.

Content dependent selection of image enhancement parameters for mobile displays

“…Previous works on content dependent image enhancement can be found in [1][2][3][4][5][6][7][8][9]. They cover contrast enhancement [1][2][3][4][5][6][7], colorfulness control [3][4][5][6][7], sharpness enhancement [4,[8][9] and noise reduction [8].…”

“…They cover contrast enhancement [1][2][3][4][5][6][7], colorfulness control [3][4][5][6][7], sharpness enhancement [4,[8][9] and noise reduction [8]. In [4], genres of TV programs are classified.…”

33.1: A 32-in. High-Contrast-Ratio OCB (Optical Compensation Bend) LCD TV

“…OCB LCD has several advantages such as fast response time, wide viewing angle [1] [2] [3], no gray scale inversion …etc, but the central contrast ratio of OCB LCD is not as good as the other wide-viewing LCD mode (e.g. MVA).…”

P-144: Low Voltage, High Contrast Ratio, and Wide Viewing Angle TN LCD's for Microdisplay, Mobile Phone and PDA Mobile Video Applications

“…Conventional optical films are used to compensate the bulk LC optical birefringence at the field-off state or field-on state. [1][2][3] The typical bulk LC retardation is about 200 to 500nm. The compensation is applied on one side or both sides of the LCD, thus their film retardation is about one-half to comparable to the bulk LC retardation.…”