# Copyright 2021 Zilliz. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from towhee.types import Image
[docs]def to_image_color(img: Image, target_mode: str):
"""
convert images from one color-space to another, like BGR ↔ Gray, BGR ↔ HSV, etc.
"""
# pylint: disable=import-outside-toplevel
from towhee.utils.cv2_utils import cv2
if not hasattr(img, 'mode'):
return img
if img.mode == target_mode:
return img
flag_name = 'COLOR_' + img.mode.upper() + '2' + target_mode.upper()
flag = getattr(cv2, flag_name, None)
if flag is None:
raise ValueError('Can not convert image from %s to %s.' % (img.mode, target_mode))
return Image(cv2.cvtColor(img, flag), target_mode.upper())
[docs]def from_pil(pil_img):
'''
Convert a PIL.Image.Image into towhee.types.Image.
Args:
pil_img (`PIL.Image.Image`):
A PIL image.
Returns:
(`towhee.types.Image`)
The image wrapepd as towhee Image.
'''
# pylint: disable=import-outside-toplevel
import numpy as np
return Image(np.array(pil_img), pil_img.mode)
[docs]def to_pil(img: Image):
"""
Convert a towhee.types.Image into PIL.Image.Image.
Args:
img (`towhee.types.Image`):
A towhee image.
Returns (`PIL.Image.Image`):
A PIL image.
"""
# pylint: disable=import-outside-toplevel
from PIL import Image as PILImage
return PILImage.fromarray(img, img.mode)
