var.common Namespace Reference

Classes
class	Bunch
class	Sketcher
class	StatValue
class	RectSelector

Functions
def	splitfn (fn)
def	anorm2 (a)
def	anorm (a)
def	homotrans (H, x, y)
def	to_rect (a)
def	rect2rect_mtx (src, dst)
def	lookat (eye, target, up=(0, 0, 1))
def	mtx2rvec (R)
def	draw_str (dst, target, s)
def	make_cmap (name, n=256)
def	nothing (*arg, **kw)
def	clock ()
def	Timer (msg)
def	grouper (n, iterable, fillvalue=None)
def	mosaic (w, imgs)
def	getsize (img)
def	mdot (*args)
def	draw_keypoints (vis, keypoints, color=(0, 255, 255))

Variables
int	PY3 = 3
list	image_extensions = ['.bmp', '.jpg', '.jpeg', '.png', '.tif', '.tiff', '.pbm', '.pgm', '.ppm']
dictionary	cmap_data = { 'jet' : _jet_data }

Function Documentation

anorm()

def var.common.anorm

(

a

)

Definition at line 70 of file common.py.

def anorm(a):
    return np.sqrt( anorm2(a) )
 

Here is the call graph for this function:

Here is the caller graph for this function:

anorm2()

def var.common.anorm2

(

a

)

Definition at line 68 of file common.py.

def anorm2(a):
    return (a*a).sum(-1)

Here is the caller graph for this function:

clock()

def var.common.clock

(

)

Definition at line 174 of file common.py.

def clock():
    return cv.getTickCount() / cv.getTickFrequency()
 
@contextmanager

Here is the caller graph for this function:

draw_keypoints()

def var.common.draw_keypoints	(		vis,
			keypoints,
			color = (0, 255, 255)
	)

Definition at line 266 of file common.py.

def draw_keypoints(vis, keypoints, color = (0, 255, 255)):
    for kp in keypoints:
        x, y = kp.pt
        cv.circle(vis, (int(x), int(y)), 2, color)

draw_str()

def var.common.draw_str	(		dst,
			target,
			s
	)

Definition at line 113 of file common.py.

def draw_str(dst, target, s):
    x, y = target
    cv.putText(dst, s, (x+1, y+1), cv.FONT_HERSHEY_PLAIN, 1.0, (0, 0, 0), thickness = 2, lineType=cv.LINE_AA)
    cv.putText(dst, s, (x, y), cv.FONT_HERSHEY_PLAIN, 1.0, (255, 255, 255), lineType=cv.LINE_AA)
 

Here is the caller graph for this function:

getsize()

def var.common.getsize

(

img

)

Definition at line 259 of file common.py.

def getsize(img):
    h, w = img.shape[:2]
    return w, h
 

grouper()

def var.common.grouper	(		n,
			iterable,
			fillvalue = None
	)

grouper(3, 'ABCDEFG', 'x') --> ABC DEF Gxx

Definition at line 234 of file common.py.

def grouper(n, iterable, fillvalue=None):
    '''grouper(3, 'ABCDEFG', 'x') --> ABC DEF Gxx'''
    args = [iter(iterable)] * n
    if PY3:
        output = it.zip_longest(fillvalue=fillvalue, *args)
    else:
        output = it.izip_longest(fillvalue=fillvalue, *args)
    return output
 

Here is the caller graph for this function:

homotrans()

def var.common.homotrans	(		H,
			x,
			y
	)

Definition at line 73 of file common.py.

def homotrans(H, x, y):
    xs = H[0, 0]*x + H[0, 1]*y + H[0, 2]
    ys = H[1, 0]*x + H[1, 1]*y + H[1, 2]
    s  = H[2, 0]*x + H[2, 1]*y + H[2, 2]
    return xs/s, ys/s
 

lookat()

def var.common.lookat	(		eye,
			target,
			up = (0, 0, 1)
	)

Definition at line 95 of file common.py.

def lookat(eye, target, up = (0, 0, 1)):
    fwd = np.asarray(target, np.float64) - eye
    fwd /= anorm(fwd)
    right = np.cross(fwd, up)
    right /= anorm(right)
    down = np.cross(fwd, right)
    R = np.float64([right, down, fwd])
    tvec = -np.dot(R, eye)
    return R, tvec
 

Here is the call graph for this function:

make_cmap()

def var.common.make_cmap	(		name,
			n = 256
	)

Definition at line 156 of file common.py.

def make_cmap(name, n=256):
    data = cmap_data[name]
    xs = np.linspace(0.0, 1.0, n)
    channels = []
    eps = 1e-6
    for ch_name in ['blue', 'green', 'red']:
        ch_data = data[ch_name]
        xp, yp = [], []
        for x, y1, y2 in ch_data:
            xp += [x, x+eps]
            yp += [y1, y2]
        ch = np.interp(xs, xp, yp)
        channels.append(ch)
    return np.uint8(np.array(channels).T*255)
 

mdot()

def var.common.mdot

(

*

args

)

Definition at line 263 of file common.py.

def mdot(*args):
    return reduce(np.dot, args)
 

mosaic()

def var.common.mosaic	(		w,
			imgs
	)

Make a grid from images.

w    -- number of grid columns
imgs -- images (must have same size and format)

Definition at line 243 of file common.py.

def mosaic(w, imgs):
    '''Make a grid from images.
 
    w    -- number of grid columns
    imgs -- images (must have same size and format)
    '''
    imgs = iter(imgs)
    if PY3:
        img0 = next(imgs)
    else:
        img0 = imgs.next()
    pad = np.zeros_like(img0)
    imgs = it.chain([img0], imgs)
    rows = grouper(w, imgs, pad)
    return np.vstack(map(np.hstack, rows))
 

Here is the call graph for this function:

mtx2rvec()

def var.common.mtx2rvec

(

R

)

Definition at line 105 of file common.py.

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)
 

nothing()

def var.common.nothing	(	*	arg,
		**	kw
	)

Definition at line 171 of file common.py.

def nothing(*arg, **kw):
    pass
 

rect2rect_mtx()

def var.common.rect2rect_mtx	(		src,
			dst
	)

Definition at line 85 of file common.py.

def rect2rect_mtx(src, dst):
    src, dst = to_rect(src), to_rect(dst)
    cx, cy = (dst[1] - dst[0]) / (src[1] - src[0])
    tx, ty = dst[0] - src[0] * (cx, cy)
    M = np.float64([[ cx,  0, tx],
                    [  0, cy, ty],
                    [  0,  0,  1]])
    return M
 
 

Here is the call graph for this function:

splitfn()

def var.common.splitfn

(

fn

)

Definition at line 63 of file common.py.

def splitfn(fn):
    path, fn = os.path.split(fn)
    name, ext = os.path.splitext(fn)
    return path, name, ext
 

Timer()

def var.common.Timer

(

msg

)

Definition at line 178 of file common.py.

def Timer(msg):
    print(msg, '...',)
    start = clock()
    try:
        yield
    finally:
        print("%.2f ms" % ((clock()-start)*1000))
 

Here is the call graph for this function:

to_rect()

def var.common.to_rect

(

a

)

Definition at line 79 of file common.py.

def to_rect(a):
    a = np.ravel(a)
    if len(a) == 2:
        a = (0, 0, a[0], a[1])
    return np.array(a, np.float64).reshape(2, 2)
 

Here is the caller graph for this function:

Variable Documentation

cmap_data

dictionary var.common.cmap_data = { 'jet' : _jet_data }

Definition at line 154 of file common.py.

image_extensions

list var.common.image_extensions = ['.bmp', '.jpg', '.jpeg', '.png', '.tif', '.tiff', '.pbm', '.pgm', '.ppm']

Definition at line 55 of file common.py.

PY3

int var.common.PY3 = 3

Definition at line 42 of file common.py.