huge changes

hdrtest.py

@@ -0,0 +1,36 @@
+import numpy as np
+import imageio.v3 as iio
+
+# --- Parameters ---
+WIDTH, HEIGHT = 1024, 1024
+CENTER_X, CENTER_Y = WIDTH // 2, HEIGHT // 2
+RADIUS = 150
+BACKGROUND_COLOR = 0.0  # Pure black
+# This is the key change: A "super-white" HDR value for the circle.
+# A value of 5.0 simulates a very bright light source.
+CIRCLE_BRIGHTNESS = 5.0
+OUTPUT_FILENAME = "halation_test_hdr.tiff"
+
+# --- Generate the image ---
+# Create coordinate grids
+y, x = np.mgrid[:HEIGHT, :WIDTH]
+
+# Calculate distance from the center
+distance = np.sqrt((x - CENTER_X)**2 + (y - CENTER_Y)**2)
+
+# Create a circular mask
+mask = distance <= RADIUS
+
+# Create a 3-channel float image
+# Use float32, as it's a standard for HDR images
+image_hdr = np.full((HEIGHT, WIDTH, 3), BACKGROUND_COLOR, dtype=np.float32)
+
+# Set the circle area to the super-white value
+image_hdr[mask] = [CIRCLE_BRIGHTNESS, CIRCLE_BRIGHTNESS, CIRCLE_BRIGHTNESS]
+
+# --- Save the image ---
+# Save as a 32-bit float TIFF to preserve the HDR values
+iio.imwrite(OUTPUT_FILENAME, image_hdr)
+
+print(f"✅ Saved HDR test image to '{OUTPUT_FILENAME}'")
+print(f"   Use this file as the input for your film simulation script.")