印刷体数字识别。已知图片中仅包含一个数字（字体没有旋转），如下图所示，但数字的空间大小不定，字体不定（比如：宋体、黑体、times new roman等）。-Identification of the Numeral Strings. Contains only one digital in the in the a picture is known (font is not rotation), are as follows shown in the figure below, but the