Figure 15.6 illustrates the user interface of a data viewer that provides a hybrid PMSon
approach incorporating both data probing and data scanning. In this example a high dimensional
hyperspectral image of a colon cell is represented visually as a two-dimensional
surface with each data coordinate represented as a digital color pixel (Fig. 15.6). The vector at
any data point can be probed by positioning the cursor over the associated pixel and clicking
the mouse. By holding down the mouse button and dragging, the user can access all the
data that is encountered during the scan. Alternatively, pre-set scan paths can be generated
from a given data pixel. Accessed data is then packaged as an OSC message and sent to a
user-designated port for sonification. The application allows the user to scan arbitrarily long
sequences to gain a general auditory representation of local regions by dragging the cursor
across the image, to hear a particular trajectory (for example a spiral generating from the
originating pixel) or to probe a particular data point by clicking the mouse on a particular
pixel [15]. Sound examples S15.8, S15.9 and S15.10 provide examples of, respectively,auditory probe (a), a linear scan (b) and a spiral originating from the cursor position (c)7.
In examples S15.9 and S15.10 the spectral components of each vector associated with the
selected pixel are scaled and mapped to frequencies in the audio range. A number of other
approaches to probing data for exploratory sonification have been developed. These include
the placement of virtual microphones [27, 23], the use of simulated sonar and the use of an
adapted waveguide mesh [15].
Figure 15.6 illustrates the user interface of a data viewer that provides a hybrid PMSon
approach incorporating both data probing and data scanning. In this example a high dimensional
hyperspectral image of a colon cell is represented visually as a two-dimensional
surface with each data coordinate represented as a digital color pixel (Fig. 15.6). The vector at
any data point can be probed by positioning the cursor over the associated pixel and clicking
the mouse. By holding down the mouse button and dragging, the user can access all the
data that is encountered during the scan. Alternatively, pre-set scan paths can be generated
from a given data pixel. Accessed data is then packaged as an OSC message and sent to a
user-designated port for sonification. The application allows the user to scan arbitrarily long
sequences to gain a general auditory representation of local regions by dragging the cursor
across the image, to hear a particular trajectory (for example a spiral generating from the
originating pixel) or to probe a particular data point by clicking the mouse on a particular
pixel [15]. Sound examples S15.8, S15.9 and S15.10 provide examples of, respectively,auditory probe (a), a linear scan (b) and a spiral originating from the cursor position (c)7.
In examples S15.9 and S15.10 the spectral components of each vector associated with the
selected pixel are scaled and mapped to frequencies in the audio range. A number of other
approaches to probing data for exploratory sonification have been developed. These include
the placement of virtual microphones [27, 23], the use of simulated sonar and the use of an
adapted waveguide mesh [15].
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