研究在图像预处理中，由于病变叶片形状大小不一、背景的存在和病状的不同，必然套对图像处理造成影响。

In the image pre-processing, because of the different sizes of pathological leaves, and the background and the different disease, the effect of the image processing may be affected.

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字体形状千差万别，大小不一，颜色各异。

Fonts come in all shapes and sizes and colours.

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它们有各种颜色，大小不一，形状各异。

They are in every colour, every size and every shape.

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