说明：  在图像的形状、颜色、纹理等特征中，颜色特征是最显著、最可靠、最稳定的视觉特征，是人识别图像的主要感知特征.
(In the image of the shape, color, texture and other features, the color features are the most significant, most reliable and stable visual features, is the perception of people identify the main features of the image.)