Convert image to single precision.
The conversion of img to single precision, is dependent on the type of input image. The following input classes are supported:
The whole range of values from the class (see getrangefromclass)
are scaled for the interval [0 1], e.g., if input image was uint8,
intensity values of 0, 127, and 255, are converted to intensity of
0, 0.498, and 1.
True and false values are assigned a value of 0 and 1 respectively.
Values are cast to double precision.
Returns the same image.
If the second argument is the string "indexed", then values are
cast to single precision, and a +1 offset is applied if input is
an integer class.
See also: im2bw, imcast, im2uint8, im2double, im2int16, im2uint16.
Package: image