picture amplitude

例句：

1. 1. The image's picture amplitude is measured in hertz.
   这幅图像的振幅以赫兹为单位测量。
2. 2. The amplitude of the wave was too low to be detected.
   这个波的振幅太低，无法被检测到。
3. 3. The amplitude of the signal is critical for accurate measurements.
   信号的振幅对于准确的测量至关重要。