The larger the aperture is, the greater the image signal to noise ratio is, which results in a greater slope of the calibration curve of the PSP.
相机的光圈值越大，所采集到的图像信噪比越大，获得的压敏涂料校准曲线斜率越大。
2
When the soil bulk density water content is between 15% to 45%, the calibration curve is approximately a straight line, and the intercept and slope are only influenced by the above factors.
当土壤容积含水量为15 ~ 45%时，校正曲线近似为一直线，其他因素只改变直线的截距或斜率。
3
The configuration of drift slope and drift offset, which are calculated through field calibration analysis, guarantees us to obtain raw data with high accuracy.