It was not supposed to be used until they got to the Moon. It had no heat shield, so could not be used to re-enter the Earth's atmosphere. But it could keep them alive until they got there.
While this is immediately effective, the random perturbations introduce a disturbing texture that can obfuscate details in the original image. To counter this, we can make some smart choices on where and by how much to perturb our input image in an attempt to add some structure to our dither and preserve some of the lost detail.
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models, their efforts were still influential enough that later ATMs inherited
capable of not only reading but, optionally, writing to the magnetic strips on
3月24日，北京市少年宫，学生科技节优秀获奖作品展上，北京市育英学校的学生在展示校园环境智能导览系统。新京报记者 李木易 摄