Remove doubling of Y in ingester, add logic to generate database.js

ingest.py

@@ -14,7 +14,7 @@ def ingest_png(file_name: str) -> tuple[str, int, int, int, int]:
     # X metric - mean sq norm of all pixels
     x = sum(x * x + y * y + z * z for x, y, z in pixels) / len(pixels)
 
-    # Y metrics - 2 * mean of color components
+    # Y metrics - mean of color components
     yr_sum = 0
     yg_sum = 0
     yb_sum = 0
@@ -22,9 +22,8 @@ def ingest_png(file_name: str) -> tuple[str, int, int, int, int]:
         yr_sum += r
         yg_sum += g
         yb_sum += b
-    yfactor = 2 / len(pixels)
 
-    return name, x, yr_sum * yfactor, yg_sum * yfactor, yb_sum * yfactor
+    return name, x, yr_sum / len(pixels), yg_sum / len(pixels), yb_sum / len(pixels)
 
 
 if __name__ == "__main__":
@@ -34,4 +33,10 @@ if __name__ == "__main__":
     data = [ingest_png("pngs/" + fn) for f in os.listdir("pngs") if (fn := os.fsdecode(f)).endswith(".png")]
     with open("database.csv", "w") as outfile:
         writer = csv.writer(outfile, delimiter=",", quotechar="'")
-        writer.writerows(data)
+        writer.writerows(data)
+
+    with open("database.js", "w") as outfile:
+        outfile.write("const database = [\n")
+        for name, x, yr, yg, yb in data:
+            outfile.write(f'  [ "{name}", {x}, {yr}, {yg}, {yb} ],\n')
+        outfile.write("];\n")