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comparison scripts/image/imwrite.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
158 ## grayscale uint8 images with alpha channel 158 ## grayscale uint8 images with alpha channel
159 %!testif HAVE_MAGICK 159 %!testif HAVE_MAGICK
160 %! gray = randi (255, 10, 10, 1, "uint8"); 160 %! gray = randi (255, 10, 10, 1, "uint8");
161 %! alpha = randi (255, 10, 10, 1, "uint8"); 161 %! alpha = randi (255, 10, 10, 1, "uint8");
162 %! [r, ~, a] = write_and_read (".tif", gray, "Alpha", alpha); 162 %! [r, ~, a] = write_and_read (".tif", gray, "Alpha", alpha);
163 %! assert (r, gray); 163 %! assert (r, cat (3, gray, alpha));
164 %! assert (a, alpha); 164 %! assert (a, []);
165 165
166 ## multipage grayscale uint8 images 166 ## multipage grayscale uint8 images
167 %!testif HAVE_MAGICK 167 %!testif HAVE_MAGICK
168 %! gray = randi (255, 10, 10, 1, 5, "uint8"); 168 %! gray = randi (255, 10, 10, 1, 5, "uint8");
169 %! r = write_and_read (".tif", gray); 169 %! r = write_and_read (".tif", gray);
172 ## multipage RGB uint8 images with alpha channel 172 ## multipage RGB uint8 images with alpha channel
173 %!testif HAVE_MAGICK 173 %!testif HAVE_MAGICK
174 %! gray = randi (255, 10, 10, 3, 5, "uint8"); 174 %! gray = randi (255, 10, 10, 3, 5, "uint8");
175 %! alpha = randi (255, 10, 10, 1, 5, "uint8"); 175 %! alpha = randi (255, 10, 10, 1, 5, "uint8");
176 %! [r, ~, a] = write_and_read (".tif", gray, "Alpha", alpha); 176 %! [r, ~, a] = write_and_read (".tif", gray, "Alpha", alpha);
177 %! assert (r, gray); 177 %! assert (r, cat (3, gray, alpha));
178 %! assert (a, alpha); 178 %! assert (a, []);
179 179
180 ## typical usage with RGB uint8 images 180 ## typical usage with RGB uint8 images
181 %!testif HAVE_MAGICK 181 %!testif HAVE_MAGICK
182 %! rgb = randi (255, 10, 10, 3, "uint8"); 182 %! rgb = randi (255, 10, 10, 3, "uint8");
183 %! r = write_and_read (".tif", rgb); 183 %! r = write_and_read (".tif", rgb);
186 ## RGB uint8 images with alpha channel 186 ## RGB uint8 images with alpha channel
187 %!testif HAVE_MAGICK 187 %!testif HAVE_MAGICK
188 %! rgb = randi (255, 10, 10, 3, "uint8"); 188 %! rgb = randi (255, 10, 10, 3, "uint8");
189 %! alpha = randi (255, 10, 10, 1, "uint8"); 189 %! alpha = randi (255, 10, 10, 1, "uint8");
190 %! [r, ~, a] = write_and_read (".tif", rgb, "Alpha", alpha); 190 %! [r, ~, a] = write_and_read (".tif", rgb, "Alpha", alpha);
191 %! assert (r, rgb); 191 %! assert (r, cat (3, rgb, alpha));
192 %! assert (a, alpha); 192 %! assert (a, []);
193 193
194 ## multipage RGB uint8 images 194 ## multipage RGB uint8 images
195 %!testif HAVE_MAGICK 195 %!testif HAVE_MAGICK
196 %! rgb = randi (255, 10, 10, 3, 5, "uint8"); 196 %! rgb = randi (255, 10, 10, 3, 5, "uint8");
197 %! r = write_and_read (".tif", rgb); 197 %! r = write_and_read (".tif", rgb);
200 ## multipage RGB uint8 images with alpha channel 200 ## multipage RGB uint8 images with alpha channel
201 %!testif HAVE_MAGICK 201 %!testif HAVE_MAGICK
202 %! rgb = randi (255, 10, 10, 3, 5, "uint8"); 202 %! rgb = randi (255, 10, 10, 3, 5, "uint8");
203 %! alpha = randi (255, 10, 10, 1, 5, "uint8"); 203 %! alpha = randi (255, 10, 10, 1, 5, "uint8");
204 %! [r, ~, a] = write_and_read (".tif", rgb, "Alpha", alpha); 204 %! [r, ~, a] = write_and_read (".tif", rgb, "Alpha", alpha);
205 %! assert (r, rgb); 205 %! assert (r, cat (3, rgb, alpha));
206 %! assert (a, alpha); 206 %! assert (a, []);
207 207
208 %!testif HAVE_MAGICK 208 %!testif HAVE_MAGICK
209 %! gray = repmat (uint8 (0:255), 100, 1); 209 %! gray = repmat (uint8 (0:255), 100, 1);
210 %! [g] = write_and_read (".jpeg", gray); 210 %! [g] = write_and_read (".jpeg", gray);
211 %! assert (g, gray, 2); 211 %! assert (g, gray, 2);