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image.topixel - Function
1.1.1 Convert from world to pixel coordinate
Description
This function converts from absolute world to pixel coordinate (0-rel). The
world coordinate can be provided in many formats (numeric, string, quantum
etc.) via the argument value. These match the output formats of function
toworld.
This function is just a wrapper for the Coordsys tool function topixel so see the documentation there for a description and more examples.
Arguments
Inputs |
| ||
value |
| Absolute world coordinate, Numeric vector, vector of
strings representing quantities, or record of format
analogous to that produced by ia.toworld(). Default is
reference value.
| |
| allowed: | any |
|
| Default: | variant |
|
record
Example
"""
#
print "\t----\t topixel Ex 1 \t----"
ia.maketestimage();
w = ia.toworld([10,10], ’n’) # Numeric vector
ia.topixel(w)
#{’ar_type’: ’absolute’,
# ’numeric’: array([10., 10.]), ’pw_type’: ’pixel’}
w = ia.toworld([10,10], ’m’) # Record of measures
ia.topixel(w)
#{’ar_type’: ’absolute’,
# ’numeric’: array([10., 10.]), ’pw_type’: ’pixel’}
ia.close()
#
"""
Convert a pixel coordinate to world as floats and then
back to pixel. Do the same with the world coordinate
formatted as measures instead.
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This code is available under the terms of the GNU General Public Lincense
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