ARRI ALEXA Mini LF Ready to Shoot V-Mount Set (LPL) - Manual (Page 94)

Sensor Settings 94
20 Sensor Settings
20.1 Noise Reduction
ARRI Noise Reduction ANR-1
ARRI Noise Reduction ANR-1 is implemented in most modern ARRI camera models and can be
used for monitoring purposes on set, recording to MXF/Apple ProRes files (baked in) or as metadata
of MXF/ARRIRAW recordings with full flexibility to change the parameter in postproduction. ARRI
Noise Reduction ANR-1 can be helpful in low light situations to reduce noise in the images. While it is
commonly available in postproduction tools, two reasons drove us towards creating a new, in-camera
ARRI noise reduction: we enable fast, in-camera noise reduction and we provide a noise reduction
method that retains the grain texture and natural looks that ARRI customers like.
Using ARRI Noise Reduction ANR-1 enables you to use noise reduction on set in the camera. This can
be helpful for low light shots, where an in-camera noise reduction is a very fast solution. Furthermore,
ARRI Noise Reduction ANR-1 gives you the possibility to combine the amount of grain with your
sharpness and detail settings for the chosen exposure directly on set.
You can store your decision either in the metadata, when recording MXF/ARRIRAW or bake it into
Apple ProRes files. In contrast to general postproduction tools, the ARRI Noise Reduction ANR-1
is optimized for the sensor noise characteristics and therefore can achieve a very natural noise
reduction without any image blurring. This noise reduction, optimized for the ARRI sensors is available
for ARRIRAW recordings by using the ARRIRAW Converter or a post-processing software that
incorporates the ARRIRAW SDK. The film grain like texture of ARRI cameras is highly appreciated by
cinematographers around the world and therefore ARRI Noise Reduction ANR-1 is moderate and does
not affect the grainy structure of the noise. The ARRI Noise Reduction ANR-1 just reduces it, nothing
more.
For more information please refer to the ARRI Texture Control White Paper, available in the
White
Papers section on the ARRI website.
► Select MENU > System > Sensor > Noise Reduction to toggle noise reduction on/off.
While recording MXF/Apple ProRes files, noise reduction will be baked into the footage and therefore
MXF/Apple ProRes files cannot be opened and altered in the ARRIRAW Converter (ARC). When
recording MXF/ARRIRAW files, the ARRI Noise Reduction ANR-1 is applied for preview (viewfinder and
SDI outputs) but not baked into the footage, instead it will be stored in metadata.
20.2 Mirroring the Sensor Image
You can mirror the sensor image in horizontal and vertical directions.
► Select
MENU > System > Sensor > Mirror Image .
You have the following options:
Off Mirroring is inactive.
V The sensor image is vertically mirrored.
H The sensor image is horizontally mirrored.
V+H The sensor image is vertically and horizontally mirrored (rotated by 180°).
Horizontal mirroring is applied on all output paths and internally recorded material. Vertical mirroring
is only applied to output paths; internally recorded material is not rotated, but rotation information is
written into metadata. Frame grabs of rotated images will be displayed upside down on a computer.