土、水泥。水泥是粉状水硬性无机胶开发者_开发知识库凝材料。加水搅拌后成浆体，能在空气中硬化或者在水中硬化，并能把砂、石等材料牢固地胶结在一起。土是尚未固结成岩的松软堆积物。主要为第四纪时的产物。土由岩
In My application as the user opens the camera,camera should capture a image as soon as there is a difference in image when compared to previous image and camera should always be in capturing mode.
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