手寫識別開發包 Zinnia

Zinnia 是一個簡單、可定制和可移植的手寫識別系統，基于 Support Vector Machines (SVM) 算法。SVM算法簡介。

功能特性：

• Practical accuracy with support vector machines
• Portable and compact design -- POSIX/Windows (depending on C++/STL)
• Thread-safe C/C++/Perl/Ruby/Python libraries
• Practical recognition speed (50--100char / sec)
• Fast training

實例代碼：

#include <stdio.h>
#include "zinnia.h"

int main(int argc, char **argv) {
  size_t i;
  zinnia_recognizer_t *recognizer;
  zinnia_character_t *character;
  zinnia_result_t *result;

  recognizer = zinnia_recognizer_new();

  if (!zinnia_recognizer_open(recognizer, "/usr/local/lib/zinnia/model/tomoe/handwriting-ja.model")) {
    fprintf(stderr, "ERROR: %s\n", zinnia_recognizer_strerror(recognizer));
    return -1;
  }

  zinnia_character_t  *character  = zinnia_character_new();
  zinnia_character_clear(character);
  zinnia_character_set_width(character, 300);
  zinnia_character_set_height(character, 300);
  zinnia_character_add(character, 0, 51, 29);
  zinnia_character_add(character, 0, 117, 41);
  zinnia_character_add(character, 1, 99, 65);
  zinnia_character_add(character, 1, 219, 77);
  zinnia_character_add(character, 2, 27, 131);
  zinnia_character_add(character, 2, 261, 131);
  zinnia_character_add(character, 3, 129, 17);
  zinnia_character_add(character, 3, 57, 203);
  zinnia_character_add(character, 4, 111, 71);
  zinnia_character_add(character, 4, 219, 173);
  zinnia_character_add(character, 5, 81, 161);
  zinnia_character_add(character, 5, 93, 281);
  zinnia_character_add(character, 6, 99, 167);
  zinnia_character_add(character, 6, 207, 167);
  zinnia_character_add(character, 6, 189, 245);
  zinnia_character_add(character, 7, 99, 227);
  zinnia_character_add(character, 7, 189, 227);
  zinnia_character_add(character, 8, 111, 257);
  zinnia_character_add(character, 8, 189, 245);

  result = zinnia_recognizer_classify(recognizer, character, 10);
  if (result == NULL) {
    fprintf(stderr, "%s\n", zinnia_recognizer_strerror(recognizer));
    return -1;
  }


  for (i = 0; i < zinnia_result_size(result); ++i) {
    fprintf(stdout, "%s\t%f\n",
            zinnia_result_value(result, i),
            zinnia_result_score(result, i));
  }

  zinnia_result_destroy(result);
  zinnia_character_destroy(character);
  zinnia_recognizer_destroy(recognizer);

  return 0;
}