Information Technology Reference
In-Depth Information
Digits
The
Digits
data set [13] comprises handwritten digits, and is often employed as refer-
ence problem related to the recognition of handwritten characters and digits. Figure 11
shows a collection of images from the
Digits
data set. The collection shows all ten
digits, while the experimental analysis concentrates on a subset.
Fig. 11.
Visualization of a collection of images from the
Digits
data set
Astronomy
Our experimental study is based on data from the Sloan Digital Sky Survey (SDSS) [1].
In [2] the EFIGI catalog of 4,458 nearby galaxies is presented. We concentrate on an
EFIGI subset of 100 galaxies of types -6 to -4, and 7 to 11. The images are
40
40
RGB images. The data has been preprocessed: all entries below a threshold
=0
.
1
have been set to
0
.
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