add new resize method

scripts/resize.py

@@ -0,0 +1,49 @@
+import cv2
+import pyexiv2
+
+import log
+import system
+import dataset
+
+def resize(images_dir, args, photos):
+
+    log.ODM_DEBUG('Preparing images - %s' % images_dir)
+
+    if len(photos) < 1:
+        log.ODM_ERROR('Not enough photos in photos to resize')
+        return False
+
+    # create directory for resized images
+    images_resize_dir = dataset.join_paths(images_dir, 'images_resize')
+    system.mkdir_p(images_resize_dir)
+
+    # define the new size
+    new_size = (args['resize_to'], args['resize_to'])
+
+    for photo in photos:
+        try:
+            # open and resize image with opencv
+            img = cv2.imread(photo.path_file)
+            img_r = cv2.resize(img, new_size)
+            # write image with opencv
+            new_path_file = dataset.join_paths(images_resize_dir, photo.file_name)
+            cv2.imwrite(new_path_file, img_r)
+            # read metadata
+            old_meta = pyexiv2.ImageMetadata(photo.path_file)
+            old_meta.read()
+            new_meta = pyexiv2.ImageMetadata(new_path_file)
+            new_meta.read()
+            # copy metadata
+            old_meta.copy(new_meta)
+            new_meta.write()
+            # log message
+            log.ODM_DEBUG('Resized image %s | dimensions: %s' % \
+                (photo.file_name, img_r.shape))
+        except cv2.error as e:
+            # something went wrong with this image
+            log.ODM_ERROR('Could not resize image %s' % photo.file_name)
+            log.ODM_ERROR('%s' % e)
+            return False
+
+    log.ODM_DEBUG('Resized %s images' % len(photos))
+    return True