Image character information is dug up with dividing up threshold value.
用阈值分割方法对图像信息特征进行提取。
The character image from the input device must be preprocessed to filter noises and enhance useful information.
为了滤除噪声，增强有用信息，经输入设备输入的字符图像一般需做预处理。
As important information and basic character, texture has significant meaning in image recognition of remote sensing.
纹理是遥感图像的重要信息和基本特征，在遥感图像的自动识别中具有重要意义。
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