(*
* Copyright (c) 2005, 2006, 2007 Abram Hindle
*
* This file is part of CaptchaBreaker
* CaptchaBreaker is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
* Foobar is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*)
(* This module tries to normalize bitmaps *)
open Contour;;
open Pca;;
open Abez;;
let status x =
prerr_endline ("[Rotter] "^x)
;;
let statusi n x = status (n ^" "^(string_of_int x)) ;;
let fi = float_of_int ;;
let rotter bmp =
status "Contour";
let contour = Contour.contour bmp in
let n = List.length contour in
status "Create matrix";
let matrix = Pca.create_matrix n 2 in
Abez.iteri (fun i (x,y) ->
Pca.matrix_set matrix i 0 (fi x);
Pca.matrix_set matrix i 1 (fi y);
) contour;
status "PCA";
let (finaldata,eigenvalues,eigenvectors,meanmatrix) = Pca.pca matrix in
status "Dims";
let (x,y) = Pca.dims finaldata in
statusi "rows" x;
statusi "cols" y;
Abez.for_map (fun i ->
let x = Pca.matrix_get finaldata 0 i in
let y = Pca.matrix_get finaldata 1 i in
(x,y)
) y
;;
let print_rotter_to_file f l =
let fd = open_out f in
List.iter (fun (x,y) ->
output_string fd ((string_of_float x) ^ " " ^ (string_of_float y) ^ "\n")
)
l;
close_out fd;
;;