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3D projection
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import cv2 | |
import numpy as np | |
import plotly.graph_objects as go | |
image = cv2.imread("earth.jpeg", cv2.IMREAD_COLOR) | |
height, width, _ = image.shape | |
image = cv2.resize(image, (300, int(height * 300 / width))) | |
height, width, _ = image.shape | |
theta = np.repeat(range(height), width) * np.pi / height | |
phi = np.tile(range(width), height) * 2 * np.pi / width | |
x = np.sin(theta) * np.cos(phi) | |
y = np.sin(theta) * np.sin(phi) | |
z = np.cos(theta) | |
b, g, r = np.dsplit(image.astype(np.uint32), 3) | |
c = np.vectorize(lambda i: f"#{i:06x}")(r << 16 | g << 8 | b).flatten() | |
fig = go.Figure(data=go.Scatter3d(x=x, y=y, z=z, mode="markers", marker=dict(color=c, size=3))) | |
fig.show() |
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earth.jpeg
file: