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9.4.1
Linear and Dark Compression
GO-5000-PGE has a dark compression circuit to improve the signal-to-noise ratio in the dark portion
of the image. This function is OFF as factory default setting and can be ON according to
applications.
Dark Compression
Linear(Factory default)
Dark Compression
9.5.
Blemish compensation
The GO-5000-PGE has a blemish compensation circuit. This function compensates blemishes on the
CMOS sensor (typically pixels with extremely high response or extremely low response). This applies
to both monochrome and color versions. Pixels that fulfill the blemish criteria can be compensated
by averaging the data from the pixel in the left adjacent column and, in the case of the
GO-5000C-PGE, the defective pixels can be compensated by averaging the data from the same
Bayer color pixel in left adjacent column. The number of pixels that can be compensated is up to
256pixels.
GO-5000-PGE has an automatic blemish detection function. After setting the threshold, when the
blemish compensation is executed, blemishes are automatically detected and stored in the memory
inside the camera. If the blemish compensation is set to ON, the stored data is loaded. The
customer can adjust white blemishes but not black blemishes.
Note: If defective pixels are found consecutively in the horizontal direction, the blemish
compensation circuit does not work.
GO-5000M-PGE / GO-5000C-PGE
No compression, Gamma=1.0
Compress the signal level in the dark portion. It can improve the
signal to noise ratio, but on the other hand, the linearity will be
deteriorated.
B/W
Color
Fig.40 Blemish compensation
Fig. 39
Gamma compensation
Function
- 56 -
Defective Pixel
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