Image with Points Overlaid

Show an image with points overlaid.

image plus points
import imageio.v3 as iio
from wgpu.gui.auto import WgpuCanvas, run
import pygfx as gfx
import numpy as np

canvas = WgpuCanvas()
renderer = gfx.renderers.WgpuRenderer(canvas)
scene = gfx.Scene()

# add image

im = iio.imread("imageio:astronaut.png")

image = gfx.Image(
    gfx.Geometry(grid=gfx.Texture(im, dim=2)),
    gfx.ImageBasicMaterial(clim=(0, 255)),
)
scene.add(image)

# add points

xx = [182, 180, 161, 153, 191, 237, 293, 300, 272, 267, 254]
yy = [145, 131, 112, 59, 29, 14, 48, 91, 136, 137, 172]
sizes = np.arange(1, len(xx) + 1, dtype=np.float32)

points = gfx.Points(
    gfx.Geometry(
        positions=[(x, y, 1) for x, y in zip(xx, yy)],
        sizes=sizes,
    ),
    gfx.PointsMaterial(
        color=(0, 1, 1, 1),
        size=10,
        size_space="world",
        size_mode="vertex",
    ),
)
scene.add(points)

camera = gfx.PerspectiveCamera(0)
camera.local.scale_y = -1
camera.show_rect(-10, 522, -10, 522)

controller = gfx.PanZoomController(camera, register_events=renderer)

if __name__ == "__main__":
    canvas.request_draw(lambda: renderer.render(scene, camera))
    run()

Total running time of the script: (0 minutes 0.599 seconds)

Gallery generated by Sphinx-Gallery