| 摘要 |
<p>A single sensor video camera includes an optical blurring filter (16) having a known spatial (or frequency) function and a color filter (18) interposed between the blurring filter (16) and an image sensor (20). The color filter (18) has red and blue filter elements (18a) intermingled among a majority of green elements (18b...18g). An accurate estimate of the blurred green light blocked by the non-green elements (18a) is recovered by applying the image signal from the sensor (20) to a digital filter (34) and substituting the resultant signal for the missing green portions. The coefficients (38) of the filter (34) are selected in an optimization process that seeks to match the known function of the blurring filter (16) to a like function of the digital filter (as represented by the coefficients). To do this the color filter (18) must be configured to provide at least two green samples on either side of a non-green element (18a).</p> |
