LC2000/LC2000-IQ/LC4000/LC4000-IQ
RollCall Control Panel Channel Operation Screens
Issue 1 Rev 6
Page 122
© 2015 SAM
11.3.4 Noise Reduction
The Noise Reduction controls enable you to reduce levels of noise and grain.
•
Split Screen:
Displays a split screen view of the output image – one side of the
screen shows the image with noise reduction, and the other side of the screen shows
the image without noise reduction.
•
Enable:
Master enable for all the noise reduction processing.
11.3.4.1
Recursive
To achieve noise reduction, the recursive filter applies a temporal recursive filter to both
luminance and chrominance picture content. To avoid blurring moving objects, the filter
includes motion detection and adaption which disables the filter when significant motion is
present.
The Luma and Chroma controls set the maximum noise reduction (0 = Off). You can set the
sensitivity of motion detection either automatically with Auto mode, or manually with the
Threshold slider.
•
Luma:
Adjusts the amount of noise reduction applied to the luminance signal. The
adjustment range is 0 to 7 in steps of 1. The preset value is 0.
•
Chroma:
Adjusts the amount of noise reduction applied to the chrominance signal.
The adjustment range is 0 to 7 in steps of 1. The preset value is 0.
•
Threshold:
Adjusts the noise reduction threshold. The adjustment range is 0 to 7 in
steps of 1. The preset value is 0.
•
Mode:
Choose between automatic or manual filtering.
In Auto mode, the background noise level is measured and the threshold set to give a
good compromise between noise reduction and motion blur. In Manual mode,
increasing the Threshold value allows for pictures with higher background noise.
Note: For best results in Manual mode, always set the threshold to the lowest value
for the desired noise reduction.
11.3.4.2
Spatial
The spatial noise reduction filter operates on luminance only and uses nearby samples to
average out noise. Picture objects and edges are detected and the filtering disabled.
You can set the sensitivity of edge detection either automatically with Auto mode, or manually
with the Threshold slider.
•
Level:
Adjusts the level of noise reduction applied to the signal. The adjustment range
is 0 to 7 in steps of 1. The preset value is 0.
•
Threshold:
The adjustment range is 1 to 4 in steps of 1. The preset value is 1.
•
Mode:
Choose between automatic and manual filtering.
In Auto mode, the background noise level is measured and the threshold set to give a
good compromise between noise reduction and picture softness. In Manual mode,
increasing the Threshold value allows for pictures with higher background noise.
•
Note: For best results in Manual mode, always set the threshold to the lowest value
for the desired noise reduction.
