地面材料非常简单，一个无缝拼贴的纹理，在反射/光泽度调节栏中设置好灰度，再利用位移增加细节。
The ground material itself is pretty straight forward, a tileable texture and suitable greyscale used within the reflect/glossiness slots and also for displacement of the finer detail.
为了尽量减小图像质量对图像拼接带来的影响，本文在图像拼接前对图像进行灰度、对比度等属性的调节，同时可以旋转待拼接的图像。
The paper adjusts the grayscale and contrast of the image, rotates the image before stitching to reduce the impact on stitching image from image quality.
针对图像中的高灰度区和灰度剧变区，应用图像局部均值和方差自适应调节增强系数。
For the regions in image where gray value is high or change intensely, local mean value and variance is adopted to control enhancement coefficients.
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