The edge position, visible area and the mean of gray value of flame also be discussed by analyzing the flame images.
分析火焰数字图像，讨论了火焰锋面位置、火焰面积、平均灰度的计算方法。
To the left of the Horsehead Nebula, visible as the small dark indentation near the image top, is the photogenic Flame Nebula.
在左侧的马头星云，靠近图像的顶部，可见小而黑暗的锯齿状物，那便是上镜的火焰星云。
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