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how to identify background taking average from a collection of images

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ahasan ratul 2015-8-20

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回答： Image Analyst 2015-10-21

i am having a problem to separate object from a collection of images. those pictures look quite similar still threshold values differ. so i wanted to identify the background taking average from the collection. for the simplicity i am attaching few photos. thanks

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Image Analyst 2015-10-21

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Can't you just take a blank shot - one with the slide in there but no cells at all?

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