QPlot: zyimage

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zyimage

Plot an image in projected zy-plane.

Call signature:

zyimage(data, rect, proj, x=0)

Help text:

zyimage(data, (z0, y0, d, h), (xz, yz)) plots an image in the zy-plane projected to the paper plane by x' = x + xz*z, y' = y + yz*z.

The image must be YxXxC, where C=1 for grayscale, C=2 for grayscale+alpha, C=3 for RGB, C=4 for RGB+alpha. The image may be either UINT8 or FLOAT.

If d is negative, the image is flipped in the z-dimension.

If h is negative, the image is flipped vertically.

Optional argument x specifies x-axis intersect of the image plane.

If None is given as a second argument, the pixel size of the image is used.

Example:

import qplot as qp

import numpy as np

qp.figure('zyimage', 3, 3)

xx = np.repeat(np.reshape(np.arange(10), (1,10,1)), 10, 0)

yy = np.transpose(xx, (1,0,2))

img = np.concatenate((xx/10,yy/10,.5+0*xx), 2)

qp.zyimage(img, [0, 0, 10, 10], [-.4, -.6])

qp.xaxis('X', np.arange(0,11,2), flip=False)

qp.yaxis('Y', np.arange(0,11,2), flip=True)

qp.zaxis('Z', np.arange(0,11,2), [-.4,-.6], below=True)

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