CGRESIZEIMAGE
Description
Provides a CONGRID like resizing of images, although it performs this service
correctly for both 2D and 3D images. Pixel locations do not change in the output
image, since the center of the pixel is used for interpolation purposes, rather than
the lower-left corner of the pixel. Unlike CONGRID, 3D images can use nearest neighbor
interpolation as well as bilinear interpolation.
Categories
Utilities
Params
image: in, required, type=any
The image variable to resize. Must be a 2D or 3D image. If a 3D image,
one of the image dimensions must be a 3.
cols: in, required, type=integer
The number of columns (i.e., XSIZE) in the output image.
rows: in, required, type=integer
The number of rows (i.e., YSIZE) in the output image.
Keywords
interpolate: in, optional, type=boolean, default=0
Is set, bilinear interpolation is used to resize the image. Otherwise,
nearest neighbor sampling is used instead.
minus_one: in, optional, type=boolean, default=0
Identical to CONGRID MINUS_ONE keyword.
Examples
Used in a similar fashion to the Congrid command, but for images::
IDL> bigEarth = FSC_Resize_Image(cgDemoData(7), 720, 720)
IDL> bigRose = FSC_Resize_Image(cgDemoData(16), 681, 447)
Author
FANNING SOFTWARE CONSULTING::
David W. Fanning
1645 Sheely Drive
Fort Collins, CO 80526 USA
Phone: 970-221-0438
E-mail: [email protected]
Coyote's Guide to IDL Programming: http://www.idlcoyote.com
History
Change History::
Written, 20 November 2010. DWF.
I have been convinced (conversations with Wayne Landsman) that if the
CENTER keyword is set, the MINUS_ONE keyword is not needed, since
it was created to solve the same problem. So, I have changed the
default setting of MINUS_ONE to 0. 11 Jan 2011. DWF.
Eenamed cgResizeImage from FSC_Resize_Image. 20 Oct 2012. DWF.
Copyright
Copyright (c) 2010, Fanning Software Consulting, Inc.