VV6501 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

VV6501

VGA CMOS Color Image Sensor

STMicroelectronics 

VV6501

Defect Categorisation

8.4 Pixel fault definitions

8.4.1

Pixel fault numbering convention

Please find the pixel notation described in Figure 31 below. For test purpose, the 3x3 array

describes 9 Bayer pixels of a common color, that is all the pixels will either be Red, Green or Blue.

The pixel under test is X.

Figure 31: Pixel numbering notation

[0] [1] [2]

[7] X [3]

[6] [5] [4]

8.4.2

Single pixel faults

STMicroelectronics define a single pixel fail as a failing pixel with no adjacent failing neighbors of the

same colour. A single pixel fail can be a “stuck at white” where the output of the pixel is permanently

saturated regardless of the level of incident light and exposure level, a “stuck at black” where the

pixel output is zero regardless of the level of incident light and exposure level or simply a pixel that

differs from its immediate neighbors by more than the test threshold, that is differ by more than 8.0%

from pixel average of color space neighbors.

In the example below in Figure 32, we assume that the pixel ‘X’ is a fail. This pixel is qualified as

single pixel fail if the pixels at positions [0],[1],[2],[3],[4],[5],[6] and [7] are “good” pixels that pass the

final test. The implemented test program qualifies a sensor with up to 120 single pixel faults. Defect

correction algorithms correct the single pixel faults in the final image.

Figure 32: Single pixel fault

[0] [1] [2]

[7] X [3]

[6] [5] [4]

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