Assertion: blemish | /r/CreatedBy | sensor defects
Facets:
value: by dust
type: CAUSE
value: in front of the sensor
type: LOCATION
Source sentences:
text: Blemishes are visible spots or marks in the image, caused by sensor defects or by dust in front of the sensor (typically separated by the Bayer, anti-aliasing, and infrared (IR) filters).