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Ming committed Dec 15, 2012
1 parent 354e507 commit 188f7aca24d17e7c546feba92d307ead9c10c4ae
@@ -255,6 +255,12 @@ @inproceedings{kvworkload_sigmetrics
workload modeling},
+ TITLE = "{Multiresolution Image Processing}",
+ NOTE = "\url{}",
+ KEY = "Multiresolution Image"
TITLE = "{Anatomy of SSDs}",
NOTE = "\url{}",
@@ -28,8 +28,9 @@ \subsection{Flash SSD}
faster and endures longer.
\subsection{Key/Value Store}
-We implemented MRIS using LevelDB~\cite{leveldb-web}, an open source
-key/value database engine developed by Google. LevelDB is
+As we implemented MRIS using LevelDB~\cite{leveldb-web}, we use it as
+an example to analyze key/value stroe. LevelDB is an open source
+key/value database engine developed by Google. LevelDB is
log-structured and organizes data into Sorted String Table (SSTable).
SSTable, introduced in Bigtable~\cite{chang06osdi}, is an immutable
data structure containing a sequence of key/value pairs sorted by the
@@ -93,6 +94,38 @@ \subsection{Key/Value Store}
the SSTables at layer $n+1$ that have overlapping keys with (a) into
new SSTables at layer $n+1$.
+\subsection{Multi-Resolution Image}
+Multi-Resolution Images are different representations of the same
+image at different resolutions. A common form of multi-resolution
+images are images with different pixel resolutions, for instance,
+thumbnails at $100\times100$, small images at $600\times800$, and
+large images at $2048\times3072$. Multi-Resolution also describes a
+category of techniques used in image processing and
+analysis~\cite{mrisimg}, including image pyramids (e.g., Laplacian
+pyramids), discrete wavelet transform, and wavelet image compression.
+Images are represented and stored with multi-resolution version not
+only because for fast preview but also for extracting different level
+of information from image content.
+As we can see from Figure~\ref{fig:mrisidea}, we see a match of the
+multi-resolution image and the storage tiers. The idea of MRIS is to
+matching the storage system for the objects stored in it. It also
+exploits the strength of different types of storage media.
+ \centering
+ \begin{minipage}[l]{0.48\linewidth}
+ \epsfig{file=figures/pyramid.eps,width=.75\linewidth}
+ \centerline{\footnotesize(a) Multi-Resolution Image}\medskip
+ \end{minipage}
+ \begin{minipage}[r]{0.48\linewidth}
+ \epsfig{file=figures/storage-tiers.eps,width=0.9\linewidth}
+ \centerline{\footnotesize(b) Storage Tiers}\medskip
+ \end{minipage}
+ \caption{Multi-Resolution Image and Storage Tiers}
+ \label{fig:mrisidea}
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