File size: 3,008 Bytes
2f85de4 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 |
# python3.7
"""Contains the visualizer to visualize images as a GIF."""
from PIL import Image
from ..image_utils import parse_image_size
from ..image_utils import load_image
from ..image_utils import resize_image
from ..image_utils import list_images_from_dir
__all__ = ['GifVisualizer']
class GifVisualizer(object):
"""Defines the visualizer that visualizes an image collection as GIF."""
def __init__(self, image_size=None, duration=100, loop=0):
"""Initializes the GIF visualizer.
Args:
image_size: Size for image visualization. (default: None)
duration: Duration between two frames, in milliseconds.
(default: 100)
loop: How many times to loop the GIF. `0` means infinite.
(default: 0)
"""
self.set_image_size(image_size)
self.set_duration(duration)
self.set_loop(loop)
def set_image_size(self, image_size=None):
"""Sets the image size of the GIF."""
height, width = parse_image_size(image_size)
self.image_height = height
self.image_width = width
def set_duration(self, duration=100):
"""Sets the GIF duration."""
self.duration = duration
def set_loop(self, loop=0):
"""Sets how many times the GIF will be looped. `0` means infinite."""
self.loop = loop
def visualize_collection(self, images, save_path):
"""Visualizes a collection of images one by one."""
height, width = images[0].shape[0:2]
height = self.image_height or height
width = self.image_width or width
pil_images = []
for image in images:
if image.shape[0:2] != (height, width):
image = resize_image(image, (width, height))
pil_images.append(Image.fromarray(image))
pil_images[0].save(save_path, format='GIF', save_all=True,
append_images=pil_images[1:],
duration=self.duration,
loop=self.loop)
def visualize_list(self, image_list, save_path):
"""Visualizes a list of image files."""
height, width = load_image(image_list[0]).shape[0:2]
height = self.image_height or height
width = self.image_width or width
pil_images = []
for filename in image_list:
image = load_image(filename)
if image.shape[0:2] != (height, width):
image = resize_image(image, (width, height))
pil_images.append(Image.fromarray(image))
pil_images[0].save(save_path, format='GIF', save_all=True,
append_images=pil_images[1:],
duration=self.duration,
loop=self.loop)
def visualize_directory(self, directory, save_path):
"""Visualizes all images under a directory."""
image_list = list_images_from_dir(directory)
self.visualize_list(image_list, save_path)
|