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comparison scripts/image/imread.m @ 31211:edbd725ee76c

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imwrite: fixed tests to reflect alpha channel behavior for Tiff images * scripts/image/imwrite.m: modified tests to correctly handled the new behavior for alpha channel in Tiff images. * scripts/image/imread.m: added a note in the function documentation about the alpha channel behavior for Tiff images.
author magedrifaat <magedrifaat@gmail.com>
date Tue, 06 Sep 2022 21:12:29 +0200
parents 796f54d4ddbf
children
comparison
equal deleted inserted replaced
31210:e83a62df599b 31211:edbd725ee76c
46 ## always return the indexes for a colormap, independent of whether @var{map} 46 ## always return the indexes for a colormap, independent of whether @var{map}
47 ## is a requested output. To obtain the actual RGB image, use @code{ind2rgb}. 47 ## is a requested output. To obtain the actual RGB image, use @code{ind2rgb}.
48 ## When more than one indexed image is being read, @var{map} is obtained from 48 ## When more than one indexed image is being read, @var{map} is obtained from
49 ## the first. In some rare cases this may be incorrect and @code{imfinfo} can 49 ## the first. In some rare cases this may be incorrect and @code{imfinfo} can
50 ## be used to obtain the colormap of each image. 50 ## be used to obtain the colormap of each image.
51 ##
52 ## For TIFF images, the transaprency channel is appended to the rest of the
53 ## channels in @var{img}, and @var{alpha} is always empty for matlab
54 ## compatibility. To differentiate between RGBA and CMYK images, check
55 ## @code{ColorType} or @code{PhotometricInterpretation} fields in the output
56 ## of @code{imfinfo}.
51 ## 57 ##
52 ## See the Octave manual for more information in representing images. 58 ## See the Octave manual for more information in representing images.
53 ## (@pxref{Representing Images}) 59 ## (@pxref{Representing Images})
54 ## 60 ##
55 ## Some file formats, such as TIFF and GIF, are able to store multiple images 61 ## Some file formats, such as TIFF and GIF, are able to store multiple images