如何使用Python PIL创建多帧.tif图像

Question

如何使用python PIL创建新图像，其中包含多个帧。

new_Image = Image.new("I;16", (num_pixels,num_rows))

for frame in range((len(final_rows)/num_rows)):
    pixels = new_Image.load()

    for row in range(num_rows):
        row_pixel = final_rows[row].getPixels()
        for pixel in range(num_pixels):
            pixels[pixel,row] = row_pixel[pixel]
    print frame
    new_Image.seek(frame)

我尝试使用上面的代码，但它给了我一个EOFError。代码通过将我拥有的总行数除以每帧的行数来获取帧数。然后它将数据用作像素数据。我试图寻找一个新的框架，但我想它还没有创建。如何创建这些框架？

编辑：我想要.tif文件格式

Answer 1

new_Image是您加载的内容，即读取 - 如果它没有多个框架，则无法移动到下一个框架。

目前PIL不支持创建多帧GIF，因此您需要切换到pillow这样做 - GitHub上有一些示例代码。

更新

花时间进一步调查，发现images2gif的错误修复版本，所以我做的是使用pip install images2gif，然后从{{下载错误修复版本3}}并覆盖pip安装的那个，但你可以下载该bug修复版本并将其放在与开发文件相同的目录中。

然后我创建了一个CreateGif.py文件：

# coding: utf-8
from __future__ import print_function # Python 2/3 compatibility
import glob
from PIL import Image
from images2gif import writeGif

DELAY=0.75  # How long between frames
FRAMES = [] # Empty list of frames
FIRST_SIZE = None # I am going to say that the first file is the right size
OUT_NAME = "test.gif" # Name to save to
filelist = glob.glob("*.jpg") # For this test I am just using the images in the current directory in the order they are

for fn in filelist:  # For each name in the list
    img = Image.open(fn) # Read the image
    if FIRST_SIZE is None:  # Don't have a size
        FIRST_SIZE = img.size  # So use this one
    if img.size == FIRST_SIZE: # Check the current image size if it is OK we can use it
        print ("Adding:", fn)  # Show some progress
        FRAMES.append(img)   # Add it to our frames list
    else:
        print ("Discard:", fn, img.size, "<>", FIRST_SIZE) # You could resize and append here!

print("Writing", len(FRAMES), "frames to", OUT_NAME)
writeGif(OUT_NAME, FRAMES, duration=DELAY, dither=0)
print("Done")

在我的测试目录中运行此操作会导致：

F:\Uploads>python CreateGif.py
Adding: Hidden.jpg
Adding: NewJar.jpg
Adding: P1000063.JPG
Adding: P1000065.JPG
Adding: P1000089.JPG
Discard: WiFi_Virgin.jpg (370, 370) <> (800, 600)
Writing 5 frames to test.gif
Done

并制作：here

现在用于TiFF文件

首先我安装了tiffile，pip install -U tiffile，我已经安装了numpy ，然后：

# coding: utf-8
from __future__ import print_function # Python 2/3 compatibility
import glob
from PIL import Image
import tifffile
import numpy

def PIL2array(img):
    """ Convert a PIL/Pillow image to a numpy array """
    return numpy.array(img.getdata(),
        numpy.uint8).reshape(img.size[1], img.size[0], 3)
FRAMES = [] # Empty list of frames
FIRST_SIZE = None # I am going to say that the first file is the right size
OUT_NAME = "test.tiff" # Name to save to
filelist = glob.glob("*.jpg") # For this test I am just using the images in the current directory in the order they are
# Get the images into an array
for fn in filelist:  # For each name in the list
    img = Image.open(fn) # Read the image
    if FIRST_SIZE is None:  # Don't have a size
        FIRST_SIZE = img.size  # So use this one
    if img.size == FIRST_SIZE: # Check the current image size if it is OK we can use it
        print ("Adding:", fn)  # Show some progress
        FRAMES.append(img)   # Add it to our frames list
    else:
        print ("Discard:", fn, img.size, "<>", FIRST_SIZE) # You could resize and append here!

print("Writing", len(FRAMES), "frames to", OUT_NAME)
with tifffile.TiffWriter(OUT_NAME) as tiff:
    for img in FRAMES:
        tiff.save(PIL2array(img),  compress=6)
print("Done")

这产生了一个很好的tiff文件，但不幸的是，SO查看器不会显示多页tiff文件，至少认为这些文件是可以接受的，如下所示。

Answer 2

从第一帧的PIL图像开始，然后保存该图像，并将列表中的其他帧图像传递到append_images参数，并将其全部保存。尽管webp似乎忽略了持续时间和循环参数，但它可以与gif，tiff和tiff格式一起使用：

im1.save(save_to, format="tiff", append_images=[im2], save_all=True, duration=500, loop=0)

另请参阅documentation。