Adding ocropus, based on an expression from iElectric.

pkgs/applications/misc/ocropus/default.nix

@@ -0,0 +1,63 @@
+{ stdenv, fetchhg, fetchurl, pythonPackages, curl }:
+
+let
+  getmodel = name: sha256: {
+    src = fetchurl {
+      url = "http://iupr1.cs.uni-kl.de/~tmb/ocropus-models/${name}";
+      inherit sha256;
+    };
+    inherit name;
+  };
+
+  models = [
+    (getmodel "en-default.pyrnn.gz"
+      "1xyi3k3p81mfw0491gb1haisazfyi2i18f1wjs1m34ak39qfqjdp")
+    (getmodel "en-uw3-linerel-2.cmodel.gz"
+      "0zdw0db2znxxd4h7aa09506nkbxd1cfqacxzyzlx42bjn951wcpw")
+    (getmodel "en-mixed-3.ngraphs.gz"
+      "1fqw7pxmjwapirp9xv3b0gn9pk53q4740qn5dw4wxfxk9dpp9lr4")
+    (getmodel "en-space.model.gz"
+      "0w5hnjm6rz5iiw1p2yixj147ifq11s9jfzrxk4v4xxmcyn365096")
+    (getmodel "en-mixed.lineest.gz"
+      "0skrziksn3zb3g8588y7jd10pnl2pzrby0119ac0awapzzg9vkvw")
+    (getmodel "uw3unlv.pyrnn.gz"
+      "0g08q9cjxxx3mg1jn4654nalxr56y2jq1h33pwxrj5lrckr7grb9")
+    (getmodel "en-uw3unlv-perchar.cmodel.gz"
+      "1izvm0wkb2vh58hjp59fw97drv17zdzrw6mz3aanrg5ax6fnfadk")
+    (getmodel "gradient.lineest.gz"
+      "1bw9hj9byjxi31rjh2xiysnx8c72jz0npxa54xgjwsqg7ihl8jzw")
+    (getmodel "en-mixed-round1.lineest.gz"
+      "1fjkygyrg4ng7kx4iqa4yhgvmw1zq72p3q5p0hcb2xxhqc04vx7c")
+    (getmodel "frakant.pyrnn.gz"
+      "0i1k95f2a8qlc6m7qq11pmjfcimyrjsfjvv20nrs2ygp9pwskmxp")
+    (getmodel "fraktur.pyrnn.gz"
+      "1wlwvxn91ilgmlri1hj81arl3mbzxc24ycdnkf5icq4hdi4c6y8b")
+  ];
+in
+pythonPackages.buildPythonPackage rec {
+  name = "ocropus-${version}";
+  version = "20130905";
+
+  src = fetchhg {
+    url = "https://code.google.com/p/ocropus.ocropy";
+    tag = "a6e0fbd820ce";
+    sha256 = "1s0v0gd6psfjp6lghwl2dj49h18mgf2n2z8hqzw8430nzhglnlvr";
+  };
+
+  buildInputs = with pythonPackages; [ curl numpy scipy pillow matplotlib ];
+
+  enableParallelBuilding = true;
+  
+  preConfigure = with stdenv.lib; ''
+    ${concatStrings (map (x: "ln -s ${x.src} models/${x.name};") models)}
+    ${pythonPackages.python}/bin/${pythonPackages.python.executable} setup.py download_models
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Open source document analysis and OCR system";
+    license = licenses.asl20;
+    homepage = https://code.google.com/p/ocropus/;
+    maintainers = with maintainers; [ iElectric viric ];
+    platforms = platforms.linux;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -3462,6 +3462,8 @@ let
 
   # mercurial (hg) bleeding edge version
   octaveHG = callPackage ../development/interpreters/octave/hg.nix { };
+  
+  ocropus = callPackage ../applications/misc/ocropus { };
 
   perl58 = callPackage ../development/interpreters/perl/5.8 {
     impureLibcPath = if stdenv.isLinux then null else "/usr";