Monochrome Defective Pixel Replacement Algorithm Description - Teledyne m640 User Manual

Monochrome Defective Pixel Replacement Algorithm Description

The replacement algorithm follows a few basic rules as defined below, which in general provides
satisfactory results. The is no embedded intelligence to adapt the rules to avoid replacing a bad
pixel with possibly other bad data.
Monochrome Sensors (case 1: single bad pixel)
A bad even pixel is replaced by the good odd pixel of the same pixel pair.
•
A bad odd pixel is replaced by the good even pixel of the same pixel pair.
•
Pixel Pair 1
even
pix0
Sensor Row
Monochrome Sensors (case 2: bad pixel pair)
When a pixel pair has both even and odd pixels marked as bad, the even pixel is replaced by
•
the preceding odd pixel and the odd pixel is replaced by the following even pixel (even if it is
marked as a bad pixel).
Pixel Pair 1
even
pix0
Sensor Row
Monochrome Sensors (case 3: bad pixel pairs at boundaries)
• When the first pixel pair of the first image row has both even and odd pixels marked as bad,
the even pixel is replaced by indeterminate data from the preceding memory location. The bad
odd pixel is replaced by the following even pixel (even if it is also marked as a bad pixel).
Pixel Pair 1
even
pix0
First Sensor Row
Indeterminate Data
106 • Operational Reference
Pixel Pair 2
odd even
pix1 pix2
Pixel Pair 2
odd even
pix1 pix2
Pixel Pair 2
odd even
pix1 pix2
Pixel Pair 3
odd even
pix3 pix4
Pixel Pair 3
odd even
pix3 pix4
Pixel Pair 3
odd even
pix3 pix4
Pixel Pair 4
odd even
pix5 pix6
Pixel Pair 4
odd even
pix5 pix6
Pixel Pair 4
odd even
pix5 pix6
Nano Series GigE Vision Camera
odd
pix7
odd
pix7
odd
pix7