When you first open the image in Photoshop it will be on a layer named Background.
当你第一次再PS里打开这张图片，它应该在名为“背景”的图层里。
To add some color to the image, open the Sketchup exported image that had the face style "Shaded with Textures" turned ON. Drag the new layer to the bottom, just above the "Background" layer.
为了给图片加上一些色彩，打开SketchUp 导出的正面样式为”阴影纹理“的图片，把这个图层拖到最下面，仅仅在“背景”图层的上面。
An efficient approach for segmenting and detecting small moving target in infrared image sequences against complex cloud layer background is given.
提出了一种对复杂云层背景下红外图像序列中弱小运动目标分割和检测的方法。
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