1 files changed, 104 insertions, 0 deletions
diff --git a/megapixels/datasets/commands/crop.py b/megapixels/datasets/commands/crop.py
new file mode 100644
index 00000000..778be0c4
--- /dev/null
+++ b/megapixels/datasets/commands/crop.py
@@ -0,0 +1,104 @@
+"""
+Crop images to prepare for training
+"""
+
+import click
+from PIL import Image, ImageOps, ImageFilter, ImageDraw
+
+from app.settings import types
+from app.utils import click_utils
+from app.settings import app_cfg as cfg
+
+@click.command()
+@click.option('-i', '--input', 'opt_dir_in', required=True,
+  help='Input directory')
+@click.option('-o', '--output', 'opt_dir_out', required=True,
+  help='Output directory')
+@click.option('-e', '--ext', 'opt_ext',
+  default='jpg', type=click.Choice(['jpg', 'png']),
+  help='File glob ext')
+@click.option('--size', 'opt_size', 
+  type=(int, int), default=(256, 256),
+  help='Output image size')
+@click.option('-t', '--crop-type', 'opt_crop_type',
+  default='center', type=click.Choice(['center', 'mirror', 'face', 'person', 'none']),
+  help='Force fit image center location')
+@click.pass_context
+def cli(ctx, opt_dir_in, opt_dir_out, opt_ext, opt_size, opt_crop_type):
+  """Crop, mirror images"""
+  
+  import os
+  from os.path import join
+  from pathlib import Path
+  from glob import glob
+  from tqdm import tqdm
+  
+
+  from app.utils import logger_utils, file_utils, im_utils
+  
+  # -------------------------------------------------
+  # process here
+
+  log = logger_utils.Logger.getLogger()
+  log.info('crop images')
+
+  # get list of files to process
+  fp_ims = glob(join(opt_dir_in, '*.{}'.format(opt_ext)))
+  log.debug('files: {}'.format(len(fp_ims)))
+  
+  # ensure output dir exists
+  file_utils.mkdirs(opt_dir_out)
+
+  for fp_im in tqdm(fp_ims):
+    im = process_crop(fp_im, opt_size, opt_crop_type)
+    fp_out = join(opt_dir_out, Path(fp_im).name)
+    im.save(fp_out)
+
+  
+def process_crop(fp_im, opt_size, crop_type):
+  im  = Image.open(fp_im)
+  if crop_type == 'center':
+    im = crop_square_fit(im, opt_size)
+  elif crop_type == 'mirror':
+    im = mirror_crop_square(im, opt_size)
+  return im
+
+def crop_square_fit(im, size, center=(0.5, 0.5)):
+  return ImageOps.fit(im, size, method=Image.BICUBIC, centering=center)
+
+def mirror_crop_square(im, size):
+  # force to even dims
+  if im.size[0] % 2 or im.size[1] % 2:
+    im = ImageOps.fit(im, ((im.size[0] // 2) * 2, (im.size[1] // 2) * 2))
+
+  # create new square image
+  min_size, max_size = (min(im.size), max(im.size))
+  orig_w, orig_h = im.size
+  margin = (max_size - min_size) // 2
+  w, h = (max_size, max_size)
+  im_new = Image.new('RGB', (w, h), color=(0, 0, 0))
+  
+  #crop (l, t, r, b)
+  if orig_w > orig_h:
+    # landscape, mirror expand T/B
+    im_top = ImageOps.mirror(im.crop((0, 0, margin, w)))
+    im_bot = ImageOps.mirror(im.crop((orig_h - margin, 0, orig_h, w)))
+    im_new.paste(im_top, (0, 0))
+    im_new.paste(im, (margin, 0, orig_h + margin, w))
+    im_new.paste(im_bot, (h - margin, 0))
+  elif orig_h > orig_w:
+    # portrait, mirror expand L/R
+    im_left = ImageOps.mirror(im.crop((0, 0, margin, h)))
+    im_right = ImageOps.mirror(im.crop((orig_w - margin, 0, orig_w, h)))
+    im_new.paste(im_left, (0, 0))
+    im_new.paste(im, (margin, 0, orig_w + margin, h))
+    im_new.paste(im_right, (w - margin, 0))
+
+  return im_new.resize(size)
+
+  
+def center_crop_face():
+  pass
+
+def center_crop_person():
+  pass
+\ No newline at end of file