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Fluorescence Color Scheme
•
Spectrum Color Scheme
•
Interferogram Color Scheme
•
Food Coloring Color Scheme
The reason for using false color display is that it is sometimes difficult to distinguish 256
different gray levels on a standard computer monitor. Converting shades of gray into colors can
significantly enhance visibility of small differences in gray scale value.
Invert Color Scheme
If checked the selected color scheme will be inverted (i.e. Black and White Color Scheme will
invert black and white pixels. Like the false color schemes, this option is used to enhance
visibility.
Record in False Color Scheme
If checked, videos or snap shots will be recorded in the selected false color scheme. If not
checked the false color scheme will be used for viewing only, and the video will be recorded in
standard black and white.
5
VIDEO RECORDING
One of the main features of the uScope application is the ability to record long, unbroken video
sequences without compression. These video sequences are stored in standard AVI format, so
that they can later be viewed by Windows Media Player or other video playback software, off-
line processed by uScope or other video processing software, compatible with the AVI standard.
To enable uncompressed video recording, uScope makes use of a double buffering system,
described below. The buffering scheme also enables pre-trigger recording, enabling you to
store a video of what happened before the trigger instant.
5.1
Video compression
uScope can use video compressors that are installed on your computer, but does not have any
built-in compression. To add compression functionality, you need to download and install a
“codec.” A compatible code
c will also need to be installed on anything that plays the video.
All codecs are not equal. Some compress well. Some compress fast. Avoid over-compressing the
d
ata. The compression occurs when the video is being captured, so it cannot be “undone” if the
results are not desirable. If you plan to perform PIV on your data we recommend using a
lossless compression. The best-quality video compression takes time. It is often best to save
videos with minimal or lossless compression and later post-process them.
The uScope software contains links to video compression codecs we recommend (Help>Help
install video compressors...).
