这些炙热、年轻的恒星构成了这幅NASA斯皮策太空望远镜所摄宇宙图像中的风景。 年轻的恒星看上去忽明忽暗，这是由于恒星表面冷点、热点的转换所造成的亮度水平的改变。
The young stars dip and peak inbrightness; shifting cold and hot spots on the stars' surfaces cause brightnesslevels to change.
拉伸可引起，如技术水平，并在Photoshop中的曲线，或图像从一个色彩空间转换到另一部分的色彩管理。
Stretching can be caused by techniques such as levels and curves in Photoshop, or by converting an image from one color space into another as part of color management.
随着人们日常生活水平的提高，人们持着手机、数码相机拍摄自然场景中的文字图像，它们即可自动把图像中的文字转换成可编辑的文本资料。
With the development of the people's life, the handle telephone and digital camera can get the nature image with word and change the image word into the edited data word.
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