仿照教程弄测距实验，串行反馈出这个代码，怎么让它出距离

[5bx3]

Traceback (most recent call last):
  File "<stdin>", line 25, in <module>
Exception: IDE interrupt
MicroPython: v1.15-r57 OpenMV: v4.1.1 HAL: v1.9.0 BOARD: OPENMV4P-STM32H743
Type "help()" for more information.
>>> 

[kidswong999]

35行的，print(length)

[5bx3]

@kidswong999 它左下角串行终端不显示距离

[kidswong999]

阈值不对，颜色都没识别出来。