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img crit ch 31

image critique - distortion

Distortion misrepresentation of size or shape of structures
Formula for MF MF=SID/SOD or MF=image size/object size
Formula for OID SID - SOD = OID
Factors affecting size distortion SID, OID (magnification and minification for digital)
Factors affecting shape distortion alignment (CR, IR or part) and angulation (direction and degree)
Increasing the SID affects size distortion how? decreases
Decreasing OID affects size distortion how? decreases
Increasing part thickness affects size distortion how? increases
improper CR alignment affects shape distortion how? increases
improper part alignment affects shape distortion how? increases
Created by: annaluz87