Photometric stereoscopic imaging system
Computational imaging
It refers to computational optical imaging. On the basis of traditional geometric optics, the information
of physical optics is organically integrated, including such physical indicators as polarization, phase,
and orbital angular momentum. With information transmission as the criterion, the information of light
field is yielded in multiple dimensions. The light field information is intensively mined by using the
expertise in mathematics and signal processing. Higher-dimensional information is obtained through
the interpretation of physical processes.
Technology application - The photometric stereoscopic technology Four 90-degree quadrant lights are used to project directional shadows in a
stroboscopic manner around the concave and convex features of measured
object. This set of image features is enhanced through various algorithms to
display subtle surface features that are difficult to find or impossible to show
on 2D images.
Application case - Detection of defects in pouch lithium battery
Four-direction original diagram
Photometric stereogram can distinguish between depressions and bulges
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