Python cv2.SVDecomp() Examples

The following are 20 code examples of cv2.SVDecomp(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module cv2 , or try the search function .
Example #1
Source File: page_dewarp.py    From page_dewarp with MIT License 6 votes vote down vote up 
def blob_mean_and_tangent(contour):

    moments = cv2.moments(contour)

    area = moments['m00']

    mean_x = moments['m10'] / area
    mean_y = moments['m01'] / area

    moments_matrix = np.array([
        [moments['mu20'], moments['mu11']],
        [moments['mu11'], moments['mu02']]
    ]) / area

    _, svd_u, _ = cv2.SVDecomp(moments_matrix)

    center = np.array([mean_x, mean_y])
    tangent = svd_u[:, 0].flatten().copy()

    return center, tangent
Example #2
Source File: common.py    From TecoGAN with Apache License 2.0 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #3
Source File: common.py    From OpenCV-Snapchat-DogFilter with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #4
Source File: common.py    From PyCV-time with MIT License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #5
Source File: common.py    From PyCV-time with MIT License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #6
Source File: common.py    From PyCV-time with MIT License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #7
Source File: gaussian_mix.py    From PyCV-time with MIT License 5 votes vote down vote up 
def draw_gaussain(img, mean, cov, color):
    x, y = np.int32(mean)
    w, u, vt = cv2.SVDecomp(cov)
    ang = np.arctan2(u[1, 0], u[0, 0])*(180/np.pi)
    s1, s2 = np.sqrt(w)*3.0
    cv2.ellipse(img, (x, y), (s1, s2), ang, 0, 360, color, 1, cv2.LINE_AA)
Example #8
Source File: common.py    From PyCV-time with MIT License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #9
Source File: gaussian_mix.py    From PyCV-time with MIT License 5 votes vote down vote up 
def draw_gaussain(img, mean, cov, color):
    x, y = np.int32(mean)
    w, u, vt = cv2.SVDecomp(cov)
    ang = np.arctan2(u[1, 0], u[0, 0])*(180/np.pi)
    s1, s2 = np.sqrt(w)*3.0
    cv2.ellipse(img, (x, y), (s1, s2), ang, 0, 360, color, 1, cv2.CV_AA)
Example #10
Source File: common.py    From ImageAnalysis with MIT License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #11
Source File: common.py    From how_do_drones_work with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #12
Source File: gaussian_mix.py    From OpenCV-Python-Tutorial with MIT License 5 votes vote down vote up 
def draw_gaussain(img, mean, cov, color):
    x, y = np.int32(mean)
    w, u, vt = cv2.SVDecomp(cov)
    ang = np.arctan2(u[1, 0], u[0, 0])*(180/np.pi)
    s1, s2 = np.sqrt(w)*3.0
    cv2.ellipse(img, (x, y), (s1, s2), ang, 0, 360, color, 1, cv2.LINE_AA)
Example #13
Source File: common.py    From CameraCalibration with GNU General Public License v3.0 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #14
Source File: common.py    From pi-tracking-telescope with MIT License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #15
Source File: common.py    From pi-tracking-telescope with MIT License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #16
Source File: common.py    From pi-tracking-telescope with MIT License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #17
Source File: common.py    From airtest with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #18
Source File: common.py    From Traffic-Sign-Detection with MIT License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #19
Source File: common.py    From MachineLearning with Apache License 2.0 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)
Example #20
Source File: common.py    From OpenCV-Python-Tutorial with MIT License 5 votes vote down vote up 
def mtx2rvec(R):
    w, u, vt = cv2.SVDecomp(R - np.eye(3))
    p = vt[0] + u[:,0]*w[0]    # same as np.dot(R, vt[0])
    c = np.dot(vt[0], p)
    s = np.dot(vt[1], p)
    axis = np.cross(vt[0], vt[1])
    return axis * np.arctan2(s, c)