User`s guide

Video and Image Processing Blockset™ Release Notes
external projectors. In addition, there is a n ew option to turn on hardw are
acceleration for improved performance.
Enhanced Video Viewer Block
The Video Viewer block has a new interface providing pixel region display
and visualization controls.
Improved Memory use in 2–D FIR Filter, 2–D
Convolution, and 2–D Correlation Blocks
The new algorithm used by 2-D FIR Filter, 2-D Convolution, and 2-D
Correlation blocks reduces memory requirements by eliminating the need for
theintermediatepadbuffer.
Run-Time Library R emoval
The Real-Time Workshop
®
software pack-and-go utility enables code
portability. In previous re leases, the Video and Image Processing Blockset
software pack-and-go .zip file included more files than necessary due to a
dependence on a run-time library that shipped with the product. In addition,
you could not examine the contents o f Video and Image Processing Blockset
run-time functions from the Real-Time Workshop H TML report, because the
code w a s accessed through the prebuilt library. In R2009a, this dependence
on the run-time library for code generation is removed. The pack-and-go .zip
file is now smaller than in previous re le ases, and the Rea l- T i me Worksh op
HTML report provides links to the source code of the run-time functions.
New Rounding Modes
The following rounding modes have been added to blocks that support
fixed-point signals:
•
Convergent — Rounds the result of a calculation to the closest
representablenumber. Inthecaseofatie,
Convergent rounds to the
nearest even num ber. This is the least biased rounding m ethod p rovided
by the blockset.
•
Round— Rounds the result of a calculation to the closest representable
number. In the case of a tie, it rounds positive numbers to the closest
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