OpenCV python Calibration
opencv的python接口尽管可以用了,仍然不觉得那么好用… 比如cvMat cv.IplImage等,为什么不用python原生的数据结构呢?
好,我就来检查下opencv中的各种数据结构、类型间的关系。
CvPoint
2D point with integer coordinates (usually zero-based).
2D point, represented as a tuple (x, y) , where x and y are integers.
CvPoint2D32f
2D point with floating-point coordinates
2D point, represented as a tuple (x, y) , where x and y are floats.
CvPoint3D32f
3D point with floating-point coordinates
3D point, represented as a tuple (x, y, z) , where x, y and z are floats.
CvPoint2D64f
2D point with double precision floating-point coordinates
2D point, represented as a tuple (x, y) , where x and y are floats.
CvPoint3D64f
3D point with double precision floating-point coordinates
3D point, represented as a tuple (x, y, z) , where x, y and z are floats.
由此看到,Point相关的传tuple,这是很容易理解的
CvSize
Pixel-accurate size of a rectangle.
Size of a rectangle, represented as a tuple (width, height) , where width and height are integers.
CvSize2D32f
Sub-pixel accurate size of a rectangle.
Size of a rectangle, represented as a tuple (width, height) , where width and height are floats.
CvRect
Offset (usually the top-left corner) and size of a rectangle.
Rectangle, represented as a tuple (x, y, width, height) , where all are integers.
CvScalar
A container for 1-,2-,3- or 4-tuples of doubles.
CvScalar is always represented as a 4-tuple.
>>> import cv >>> cv.Scalar(1, 2, 3, 4) (1.0, 2.0, 3.0, 4.0) >>> cv.ScalarAll(7) (7.0, 7.0, 7.0, 7.0) >>> cv.RealScalar(7) (7.0, 0.0, 0.0, 0.0) >>> cv.RGB(17, 110, 255) (255.0, 110.0, 17.0, 0.0)
CvTermCriteria
Termination criteria for iterative algorithms.
Represented by a tuple (type, max_iter, epsilon) .
- type
- CV_TERMCRIT_ITER , CV_TERMCRIT_EPS or CV_TERMCRIT_ITER | CV_TERMCRIT_EPS
- max_iter
- Maximum number of iterations
- epsilon
- Required accuracy
(cv.CV_TERMCRIT_ITER, 10, 0) # terminate after 10 iterations (cv.CV_TERMCRIT_EPS, 0, 0.01) # terminate when epsilon reaches 0.01 (cv.CV_TERMCRIT_ITER | cv.CV_TERMCRIT_EPS, 10, 0.01) # terminate as soon as either condition is met
------------------------------分割--------------------------------------
CvMat
A multi-channel 2D matrix. Created by CreateMat , LoadImageM , CreateMatHeader , fromarray .
- type
- A CvMat signature containing the type of elements and flags, int
- step
- Full row length in bytes, int
- rows
- Number of rows, int
- cols
- Number of columns, int
- tostring() → str
- Returns the contents of the CvMat as a single string.
CvMatND
Multi-dimensional dense multi-channel array.
- type
- A CvMatND signature combining the type of elements and flags, int
- tostring() → str
- Returns the contents of the CvMatND as a single string.
IplImage
The IplImage object was inherited from the Intel Image Processing Library, in which the format is native. OpenCV only supports a subset of possible IplImage formats.
- nChannels
- Number of channels, int.
- width
- Image width in pixels
- height
- Image height in pixels
- depth
Pixel depth in bits. The supported depths are:
- IPL_DEPTH_8U
- Unsigned 8-bit integer
- IPL_DEPTH_8S
- Signed 8-bit integer
- IPL_DEPTH_16U
- Unsigned 16-bit integer
- IPL_DEPTH_16S
- Signed 16-bit integer
- IPL_DEPTH_32S
- Signed 32-bit integer
- IPL_DEPTH_32F
- Single-precision floating point
- IPL_DEPTH_64F
- Double-precision floating point
- origin
- 0 - top-left origin, 1 - bottom-left origin (Windows bitmap style)
- tostring() → str
- Returns the contents of the CvMatND as a single string.
CvArr
Arbitrary array
CvArr is used only as a function parameter to specify that the parameter can be:
- an IplImage
- a CvMat
- any other type that exports the array interface 即要有__array_interface__属性
于此看来,point size color scaler 啥的用tuple就可以了,而mat iplimage 啥的要用opencv上定义的,但有一个疑惑是有次需要传mat的时候,我传入了一个list竟然没有出问题。有人能帮忙解释下么?
转载于:https://www.cnblogs.com/justin_s/archive/2010/12/28/1918723.html
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