clean up folder

tools/patch_generation/patchgen_DD02C_dot.py

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+import numpy as np
+from PIL import Image, ImageDraw
+
+# Parameters
+R = 9.0          # mm
+H = 20.0         # mm
+fov_half = np.radians(75)  # 75 degrees half-angle
+pixels_per_mm = 100
+
+# Texture dimensions
+width = int(np.pi * 2 * R * pixels_per_mm)   # circumference
+height = int(H * pixels_per_mm)
+
+# Desired dot pattern in image space (normalized)
+delta_theta = np.radians(10)      # 10° azimuth spacing
+delta_r = 0.1                     # radial spacing in normalized units
+rho = 0.08                        # normalized dot radius (from reference)
+
+# Generate dot centers in image space
+r_vals = np.arange(R/H, np.tan(fov_half), delta_r)
+theta_vals = np.arange(0, 2*np.pi, delta_theta)
+
+# Create empty texture (white background)
+img = Image.new('L', (width, height), color=255)
+draw = ImageDraw.Draw(img)
+
+for r_img in r_vals:
+    z = R / r_img
+    v = z / H
+    # Ellipse axes in texture coordinates
+    a_u = (rho * z) / (2 * np.pi * R)
+    a_v = (rho * z**2) / (R * H)
+    # Convert to pixels
+    a_u_px = a_u * width
+    a_v_px = a_v * height
+    for theta in theta_vals:
+        u = theta / (2 * np.pi)
+        cx = u * width
+        cy = v * height
+        # Draw ellipse (bounding box)
+        bbox = [cx - a_u_px, cy - a_v_px, cx + a_u_px, cy + a_v_px]
+        draw.ellipse(bbox, fill=0)   # black dot
+
+img.save('cylinder_marker_texture.png')