Python ValueError: Expected 1D or 2D array, got 3D array instead

ValueError: Expected 1D or 2D array, got 3D array instead"/>

Python ValueError: Expected 1D or 2D array, got 3D array instead

Python计算相机响应函数并存储至txt文件时发生错误，源代码如下：

# 估计相机响应函数曲线
calibrateDebevec = cv2.createCalibrateDebevec()
responseDebevec = calibrateDebevec.process([img1, img2, img3], times=np.array([1, 2, 4], dtype=np.float32))
np.savetxt('response_curve.txt', responseDebevec)

显示错误：

Traceback (most recent call last):File "D:\HApp\Deep\Pycharm-Community\PycharmProjects\pythonProject17\RANDOM_test1111\matttt.py", line 27, in <module>np.savetxt('response_curve.txt', responseDebevec)File "<__array_function__ internals>", line 180, in savetxtFile "D:\HApp\Deep\anaconda3\envs\python38_64\lib\site-packages\numpy\lib\npyio.py", line 1397, in savetxtraise ValueError(
ValueError: Expected 1D or 2D array, got 3D array instead

这个错误是因为 np.savetxt() 函数只接受1D或2D数组作为输入，而 responseDebevec 是一个3D数组。

responseDebevec 是一个由多个曝光时间下的每个像素的响应值组成的数组，它的维度是（图像高度，图像宽度，曝光时间数目）。

要将 responseDebevec 保存为文本文件，你需要将其转换为2D数组。可以使用 np.reshape() 函数将 responseDebevec 转换为2D数组。修改代码如下：

# 将 responseDebevec 转换为2D数组
response_2d = responseDebevec.reshape(-1, responseDebevec.shape[-1])# 将2D数组保存为文本文件
np.savetxt('response_curve.txt', response_2d)

结果正确。

D:\HApp\Deep\Pycharm-Community\PycharmProjects\pythonProject17\RANDOM_test1111\matttt.py Process finished with exit code 0

成功获得所需存储的txt文件。