However, it is impossible to completely get rid of the image distortions, such as the distortions of grey level and color, caused by hardware of machine vision system and the projection of three-dimensional object to a two-dimensional image.
除了计算机视觉系统本身硬件设备的局限性造成的图像失真外，三维物体投影到二维图像平面时也会形成不同程度的灰度和颜色变化，来反映物体的形状信息。
参考来源 - 球体图像的灰度变换与颜色变换模型及其在柑桔图像校正中的应用研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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