REAL-TIME FALSE COLOR REDUCTION SYSTEM AND METHOD FOR COLOR INTERPOLATION

摘要

A false color reduction system and method for color interpolation is disclosed in the present invention. The false color reduction system includes a red/blue color interpolation signal reference level estimator, a red/blue color interpolation signal noise analyzer and a red/blue color interpolation signal noise regulator. The red/blue color interpolation signal reference level estimator receives a RGB image array and a red/blue color interpolation signal of the RGB image array, and calculates a difference value between a green target pixel or a green interpolation pixel corresponding to a red/blue target pixel of the RGB image array and an average value of a plurality of green pixels nearby the green target pixel or the green interpolation pixel to generate a green difference signal. The red/blue color interpolation signal reference level estimator further calculates an average signal of the red/blue color interpolation signal and a plurality of the same color pixels around the red/blue color interpolation signal, and generates a red/blue reference level according to the green difference signal and the average signal. The red/blue color interpolation signal noise analyzer is coupled to the red/blue color interpolation signal reference level estimator and receives the red/blue reference level. The red/blue color interpolation signal noise analyzer determines if a value of the red/blue color interpolation signal is larger than a sum of the red/blue reference level and a correlation value, and determines the value of the red/blue color interpolation signal is smaller than a difference between the red/blue reference level and a correlation value so as to generate a analysis result. The red/blue color interpolation signal noise regulator is coupled to the red/blue color interpolation signal noise analyzer and receives the analysis result to correct the red/blue color interpolation signal.

主权项

1. A false color reduction system, receiving a RGB image array comprising:
a red/blue color interpolation signal reference level estimator, receiving the RGB image array and a red/blue color interpolation signal of the RGB image array, calculating a difference value between a green target pixel or a green interpolation pixel corresponding to a red/blue target pixel of the RGB image array and an average value of a plurality of green pixels nearby the green target pixel or the green interpolation pixel to generate a green difference signal, calculating an average signal of the red/blue color interpolation signal and a plurality of the same color pixels around the red/blue color interpolation signal, and generating a red/blue reference level according to the green difference signal and the average signal; a red/blue color interpolation signal noise analyzer, coupled to the red/blue color interpolation signal reference level estimator, wherein the red/blue color interpolation signal noise analyzer receives the red/blue reference level, determines if a value of the red/blue color interpolation signal is larger than a sum of the red/blue reference level and a correlation value, and determines if the value of the red/blue color interpolation signal is smaller than a difference between the red/blue reference level and the correlation value so as to generate an analysis result; and a red/blue color interpolation signal noise regulator, coupled to the red/blue color interpolation signal noise analyzer, wherein the red/blue color interpolation signal noise regulator receives the analysis result to generated a corrected red/blue color interpolation signal.