Specifications
48
Alvium CSI-2 Cameras User Guide V2.6.2
Wavelength
The wavelength range in the absolute QE plots reflects the information available in
the sensor manufacturer data sheet at the time of publishing. For additional
wavelength information, contact the sensor manufacturer.
Spectral response plots
The curves in the spectral response plots shown in this chapter were calculated
from measured quantum efficiencies at 448 nm, 529 nm, and 632 nm. The shape
of the curve is taken from the sensor data sheet but the values have been adjusted
based on these measured values. The uncertainty in measurement of the spectral
response values is ±10 percent.
Pixel format default and naming
The
default pixel format
for Alvium cameras is RGB888 (RGB3). Monochrome
cameras are included to enable quick access on V4L2 where V4L2_PIX_FMT_UYVY
is the default. For monochrome cameras, the 3 bytes for RGB are set to a common
value, resulting in gray.
Pixel format naming
•
Video4Linux Access: according to V4L2 definitions.
•
Direct Register Access: Alvium CSI-2 cameras output pixel formats according to
the MIPI CSI-2 standard.
This manual states extended MIPI CSI-2 definitions.
Different names for equivalent formats:
Naming pattern
Examples
MIPI CSI-2 (FOURCC)
RAW8 (GREY)
RGB888 (RGB3)
Table 14: Pixel format naming convention in specifications
MIPI CSI-2
V4L2
V4L2
FOURCC
PFNC
1
YUV422 8-bit
V4L2_PIX_FMT_UYVY
UYVY
YCbCr422_8_CbYCrY
RGB888
V4L2_PIX_FMT_RGB24
RGB3
RGB8
RAW8
V4L2_PIX_FMT_GREY
GREY
Mono8
RAW10
V4L2_PIX_FMT_Y10
Y10
Mono10
RAW12
V4L2_PIX_FMT_Y12
Y12
Mono12
1
GenICam Pixel Format Naming Convention
Table 15: Equivalent pixel formats in different standards