User Guide

Canvas 12 User Guide
Dense plot displayed without
adjusted accuracy (at zoom 50%)
Same fragment with adjusted
accuracy(at zoom 50%)
Background options
Another way of visualizing seismic data can be accomplished by creating a background image in
which color is directly derived from the data. The image representation of the data is created by
assigning colors to maximum, minimum, and 0 value of the data. All other data values fall in positive
(between maximum value and 0) and negative (between 0 and minimum value) ranges, number of
which is set by the user. The same is done with the color space between colors assigned to
maximum, minimum, and 0 values. Each range of values is then assigned a color that will represent
the range in the image. Colors can be later interpolated between neighboring traces to create a
smoother image.
A color legend can also be created. The number of notches on the legend can be set by entering
values in the Positive steps and Negative steps fields. The maximum number of notches is 20.
Click Apply to create a new image from data contained in selected traces using current options. Click
Purge to erase the image already created for the selected traces.
The following images show image representation of the same fragment of data using different color
ranges.
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