且f/8, 比f/5.6差了一级光圈, 即使用了高一倍ISO, 但时间只用最长30秒一幅, 那较暗区会湮没在数量化误差(quantization errors)之中, M45云气不见了, M42旁的NGC 1973/5/7也很模糊了(用200mm f/5.6 1 min那张是相当清楚见得到的)。
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Quantization errors can be effectively reduced by means of a multipath averaging procedure.
通过对多径信号的平均能有效地减小量化误差。
Part 2 explains how ADCs and DACs introduce noise through quantization errors, offset errors, and other "DC" errors.
第2部分解释adc和DAC如何通过量子化误差、偏移误差和其它DC误差产生噪声。
Designers need to keep in mind the quantization errors that result from the fixed-point representation of Numbers on a fixed-point processor.
设计人员需要关注定点处理器中因定点数表示法而引起的量化误差问题。
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