Vatech A9

Vatech A9 (PHT-30CSS)
Technical manual
VDH-TeM-098
65 / 214
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3.6. CT Bad Pixel Verification
3.6.1. Bad pixel definition
• Dead pixel: no responsive pixel (value : 0 or 16384)
• Non-uniform response pixel: Pixels with ±30% response deviation from neighboring pixels
3.6.2. Bad line definition
 Bad pixels over 50% of effective area width and height are defined as bad lines
 When it is an effective area of M x N,
1 x M or N x 1 or more is defined as a bad line
 Total max. 7 line
 There should be at least 5 lines of normal pixels between bad and bad lines.
3.6.3. Cluster definition
 Continuous bad pixels with 3 x 3 or more continuous . (Single bad pixel is surrounded by bad
pixels in all directions (up/down/left/right/diagonal))
686 Pixel
Bad line