Mercurial > octave-antonio
diff scripts/image/imread.m @ 17118:c97a26408ee0
Implement PixelRegion option for imread().
* imread.m: document new option.
* private/__imread__.m: parse new option and set defaults.
* __magick_read__.cc (calculate region): new option to calculate the region
to be read, shifts in memory required, and output image size.
(read_indexed_images, read_images): implement reading of only specific
regions of an image.
(__magick_read__): get octave_scalar_map at start for simplicity.
| author | Carnë Draug <carandraug@octave.org> |
|---|---|
| date | Wed, 31 Jul 2013 21:28:48 +0100 |
| parents | 3db796f89695 |
| children | d6499c14021c |
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--- a/scripts/image/imread.m Wed Jul 31 21:25:04 2013 +0200 +++ b/scripts/image/imread.m Wed Jul 31 21:28:48 2013 +0100 @@ -65,6 +65,12 @@ ## This option exists for @sc{Matlab} compatibility and has no effect. For ## maximum performance while reading multiple images from a single file, ## use the Index option. +## +## @item "PixelRegion" +## Controls the image region that is read. Takes as value a cell array +## with two arrays of 3 elements @code{@{@var{rows} @var{cols}@}}. The +## elements in the array are the start, increment and end pixel to be +## read. If the increment value is ommited, defaults to 1. ## @end table ## ## @seealso{imwrite, imfinfo, imformats}