Initial data commit

Task/Bitmap-Histogram/OCaml/bitmap-histogram-1.ocaml

@@ -0,0 +1,14 @@
+type histogram = int array
+
+let get_histogram ~img:gray_channel =
+  let width = Bigarray.Array2.dim1 gray_channel
+  and height = Bigarray.Array2.dim2 gray_channel in
+  let t = Array.make 256 0 in
+  for x = 0 to pred width do
+    for y = 0 to pred height do
+      let v = gray_get_pixel_unsafe gray_channel x y in
+      t.(v) <- t.(v) + 1;
+    done;
+  done;
+  (t: histogram)
+;;