added image generation factories for transparency experiments

computational-psychology · Mar 20, 2020 · 203bec4 · 203bec4
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diff --git a/transparency/README.md b/transparency/README.md
@@ -0,0 +1,38 @@
+# Checkerboard Factory
+Create images of 3-dimensional checkerboards and optionally a transparent rectangle covering a part of the board.
+
+![3D checkerboard](./example_images/checkerboard_stacked.png)
+
+### Example Usage
+```
+f = CheckerboardFactory()
+f.find_checkerboard(n_checks=8)
+f.build_image(tau=2, alpha=.5, camera_offset=(1, 0, 0))
+checkerboard = f.get_checkerboard()
+cutout = f.get_cutout()
+stacked = f.get_stacked()
+```
+
+### Requires
+- PovRay
+- PIL
+- Numpy
+
+# Texture Factory
+Create 2-dimensional textures with an optional transparent circle covering layered over the center.
+
+Supports random textures and alternating checkerboard patterns.
+
+![Texture Random](./example_images/texture_random.png)
+![Texture Checkerboard](./example_images/texture_checkerboard.png)
+
+### Example Usage
+```
+f_c = TextureFactory('checkerboard', 10, image_width=200)
+img_c = f_c.get_image(.5, .75, circle_radius=50, bg_luminosity=.5)
+f_r = TextureFactory('random', 2, image_width=200)
+img_r = f_r.get_image(1, .5, circle_radius=50)
+```
+
+### Requires
+- Numpy
diff --git a/transparency/__init__.py b/transparency/__init__.py
@@ -0,0 +1,6 @@
+"""
+Generation of stimuli for transparency/contrast experiments
+
+"""
+
+from transparency import *
diff --git a/transparency/checkerboard.png b/transparency/checkerboard.png
diff --git a/transparency/checkerboard.pov b/transparency/checkerboard.pov
@@ -0,0 +1,117 @@
+#version 3.7;
+
+background { color rgb <0.50, 0.50,0.50>}
+
+#declare lens=camera{perspective location <01,16,-50>  look_at <00,00,00>  angle 12};
+camera{lens}
+
+light_source{<20, 10, 7>  color rgb <1.00, 1.00, 1.00> area_light 6*x, 6*y, 12, 12}
+
+union{
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