commit 93f32c5bac6cbebc9a741e8cc678328f228e0a21
Author: Leonora Tindall <nora@nora.codes>
Date:   Mon May 27 09:25:25 2024 -0500

    Initial commit

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..1d953f4
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use nix
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..92b2793
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.direnv
diff --git a/gen.py b/gen.py
new file mode 100644
index 0000000..34b9f98
--- /dev/null
+++ b/gen.py
@@ -0,0 +1,126 @@
+from PIL import Image, ImageFilter, ImageDraw, ImageEnhance
+import random
+import tempfile
+
+# Thickness of the bars in the third (test) row.
+# No more than 10
+RESULTS = [0, 1, 4, 8, 16, 32, 20, 10, 5, 3]
+# Travel of the bars in the third (test) row.
+# No more than 10
+TRAVELS = [0, 0, 0, 3, 3, 3, 2, 1, 0, 4]
+
+SIZE = (1024, 256)
+SSHIFT = 16
+OSIZE = (SIZE[0] + SSHIFT, SIZE[1] + SSHIFT)
+NNOISEBLOT = random.randrange(128)
+
+im = Image.new("L", SIZE, "white")
+draw = ImageDraw.Draw(im)
+
+# add large/macro noise
+for _ in range(NNOISEBLOT):
+    noise_blot_x = random.randrange(OSIZE[0])
+    noise_blot_y = random.randrange(OSIZE[1])
+    noise_blot_size = random.randrange(int(max(OSIZE) / 32.0))
+    draw.ellipse([(noise_blot_x, noise_blot_y), (noise_blot_x + noise_blot_size,
+                                                 noise_blot_y +
+                                                 noise_blot_size)], fill=226)
+
+# blur out macro noise
+im = im.filter(ImageFilter.SMOOTH)
+im = im.filter(ImageFilter.MedianFilter(size=3))
+
+# flip one in four pixels to thwart sharpening
+draw = ImageDraw.Draw(im)
+for y in range(OSIZE[1]):
+    for x in range(OSIZE[0]):
+        if random.choice([True, False]):
+            npval = random.randrange(200, 250)
+            draw.point((x, y), fill=npval)
+
+# average, blur, and desaturate resulting noise to create backdrop
+im = im.filter(ImageFilter.MedianFilter(size=3))
+im = im.filter(ImageFilter.GaussianBlur(radius=8))
+
+BAR_X_MARGIN = OSIZE[0] / 32
+BAR_HEIGHT = OSIZE[1] / 16
+BAR_BOUNDING_LEN = (OSIZE[0] - BAR_X_MARGIN) / 16
+draw = ImageDraw.Draw(im)
+for line_i in range(int((OSIZE[1] - BAR_HEIGHT) / (BAR_HEIGHT * 4))):
+    for bar_i in range(int((OSIZE[0] - BAR_X_MARGIN) / (BAR_BOUNDING_LEN + BAR_X_MARGIN))):
+        # for the p-control line, increasing concentration across
+        height = bar_i * 2
+
+        # for the n-control line, random very low positives
+        if line_i == 1:
+            height = random.randrange(0, 4)
+            if height < 3:
+                continue
+            height = height - 2
+
+        # for the test line, as indicated
+        if line_i == 2:
+            if len(RESULTS) > bar_i:
+                height = RESULTS[bar_i]
+            else:
+                height = 0
+            if height == 0:
+                continue
+
+        travel = 0
+        if len(TRAVELS) > bar_i:
+            travel = TRAVELS[bar_i]
+        x_offset = random.randrange(int(BAR_BOUNDING_LEN / 3))
+        y_offset = (BAR_HEIGHT - height) / 2 - random.randrange(int(BAR_HEIGHT / 4))
+        start_x = (BAR_BOUNDING_LEN * bar_i) + (BAR_X_MARGIN * (bar_i + 1)) + x_offset
+        start_y = ((line_i + 1) * BAR_HEIGHT * 4) + y_offset - travel
+        draw.rectangle([start_x, start_y, start_x + BAR_BOUNDING_LEN,
+                        start_y + height], fill=0)
+
+        if height == 0:
+            continue
+
+        opaq = random.randrange(0, 192)
+        incursion = random.randrange(1, 8)
+        draw.rectangle([start_x + incursion, start_y - 2, start_x + BAR_BOUNDING_LEN - incursion,
+                        start_y + height - 2], fill=opaq)
+        draw.rectangle([start_x, start_y + (height/2) - 2, start_x + BAR_BOUNDING_LEN,
+                        start_y + (height/2) + 2], fill=0)
+
+        if len(TRAVELS) > bar_i and TRAVELS[bar_i] != 0:
+            start_x = (BAR_BOUNDING_LEN * bar_i) + (BAR_X_MARGIN * (bar_i + 1))\
+                    + x_offset + (BAR_BOUNDING_LEN * 0.10)
+            start_y = ((line_i + 1) * BAR_HEIGHT * 4) + y_offset
+            draw.rectangle([start_x, start_y, start_x + (BAR_BOUNDING_LEN * 0.80),
+                            start_y + int(height / 2)], fill=64)
+
+im = im.filter(ImageFilter.MedianFilter(size=3))
+
+# draw random bars of white for proceessing noise
+draw = ImageDraw.Draw(im)
+n_bars = random.randrange(1, 10)
+for bar_i in range(int(n_bars)):
+    x = random.randrange(OSIZE[0])
+    width = random.randrange(1, 3)
+    draw.line([x, 0, x + 3, OSIZE[1]], fill=255, width=width)
+
+n_bars = random.randrange(30, 300)
+for pbar_i in range(int(n_bars)):
+    x = random.randrange(OSIZE[0])
+    ys = random.randrange(OSIZE[1])
+    l = random.randrange(int(OSIZE[1] / 3))
+    draw.line([x, ys, x, ys + l], fill=255, width=1)
+
+n_bars = random.randrange(100, 1000)
+for pbar_i in range(int(n_bars)):
+    y = random.randrange(OSIZE[1])
+    xs = random.randrange(OSIZE[0])
+    l = random.randrange(int(OSIZE[0] / 8))
+    draw.line([xs, y, xs + l, y], fill=255, width=1)
+
+im = im.filter(ImageFilter.GaussianBlur(radius=3))
+
+im = im.crop((SSHIFT/2, SSHIFT/2, SIZE[0] - SSHIFT/2, SIZE[1] - SSHIFT/2))
+f = tempfile.NamedTemporaryFile(suffix=".png", delete=False, delete_on_close=False)
+im.save(f, format="png")
+print(f.name)
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..c65f283
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,13 @@
+{ pkgs ? import (fetchTarball {
+    name = "nixos-24.05-2024-05-25";
+    url = "https://github.com/nixos/nixpkgs/archive/d12251ef6e8e6a46e05689eeccd595bdbd3c9e60.tar.gz"; 
+    sha256 = "0khxvys8iz32pffyqqlch4s6f28vk8wj20d8w29salh2pm35z3yi";
+  }) {} }:
+
+  pkgs.mkShellNoCC {
+    packages = with pkgs; [
+      (python312.withPackages (ps: [
+        ps.pillow
+      ]))
+    ];
+  }