pillow

问题 I have code which add gradient on image. def st(path, gradient_magnitude=2.): im = Image.open(path) if im.mode != 'RGBA': im = im.convert('RGBA') width, height = im.size gradient = Image.new('L', (width, 1), color=0xFF) for x in range(width): gradient.putpixel((x, 0), int(255 * (1 - gradient_magnitude * float(x) / width))) alpha = gradient.resize(im.size) black_im = Image.new('RGBA', (width, height), color=0x000000) black_im.putalpha(alpha) gradient_im = Image.alpha_composite(im, black_im)

问题 So in python i have a Label that I'm using to display images. But the images are rather large and they exceed the size of the label. Is there a way to load the images to fit the label without resizing them? here is what i do now. labelWidth = top.winfo_screenwidth() labelHeight = top.winfo_screenheight() maxsize = (labelWidth, labelHeight) im.thumbnail(maxsize, Image.ANTIALIAS) tkpi = ImageTk.PhotoImage(im) but this takes way to long. Thanks in advanced, I'm very new to Python. 回答1: try: im =

问题 When running the following code: KEEP=[] for file in glob.glob("./KEEP/thing*.[tT][iI][fF]"): m = pattern.search(file) filename=m.group(1) keep=Image.open(file) keep.load() KEEP.append(keep) KEEP_NAMES.append(filename) keep.close() over more than a thousand files, I get the error message: Traceback (most recent call last): File "/hom/yannis/texmf/python/remove-harakat.py", line 123, in <module> File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 2237, in open IOError: [Errno 24]

问题 When running the following code: KEEP=[] for file in glob.glob("./KEEP/thing*.[tT][iI][fF]"): m = pattern.search(file) filename=m.group(1) keep=Image.open(file) keep.load() KEEP.append(keep) KEEP_NAMES.append(filename) keep.close() over more than a thousand files, I get the error message: Traceback (most recent call last): File "/hom/yannis/texmf/python/remove-harakat.py", line 123, in <module> File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 2237, in open IOError: [Errno 24]

问题 I'm joining a project, so I want to set up the environnment, so what I did is : pip install -r requirements.txt This fully installed all requirements including django 1.7.0, Pillow 2.4.0 and some others. Then I want to build the database : python manage.py migrate And boom, error, I get the following : CommandError: System check identified some issues: ERRORS: stu.chan.icon: (fields.E210) Cannot use ImageField because Pillow is not installed. HINT: Get Pillow at https://pypi.python.org/pypi

问题 I want in the x-ray image below to (by using Python): identify the rotation of the (imperfect) rectangle block rotate the image so that it is in vertical (portrait form) remove by cropping the remaining white space I guess this partly the reverse of this question where the tools are most likely identical with the addition of a corner detector. I'm not entirely sure of how to best approach this and it seems like a problem that someone has solved. 回答1: This can be done using the Python bindings

问题 I need to add transparent gradient to an image like on the image below , I tried this: def test(path): im = Image.open(path) if im.mode != 'RGBA': im = im.convert('RGBA') width, height = im.size gradient = Image.new('L', (width, 1), color=0xFF) for x in range(width): gradient.putpixel((0 + x, 0), x) alpha = gradient.resize(im.size) im.putalpha(alpha) im.save('out.png', 'PNG') But with this I added only white gradient. How can I change color of gradient and control size of gradient. I need

问题 I'm testing out an app that I've made which, amongst other things, loads a couple of .png images when opened. The images are displayed correctly on my Mac (10.7.5) and my mother's (10.8.5); however when my sister opens it on hers (10.9.5) the images don't load. All other functionality is otherwise intact. I should note that on my Mac and my mother's, I installed Python 3.4 and many of the packages that the app uses, including the PIL package, whereas my sister has none of these. The app was

问题 I'm trying to use PIL / Pillow in Python to open a PNG image. You'd think it'd be trivial, but the images are showing up corrupted. Here's an example image: I tried loading it and showing it, using Python 3.4 and Pillow 2.7.0: $ python Python 3.4.0 (v3.4.0:04f714765c13, Mar 16 2014, 19:25:23) [MSC v.1600 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> import PIL.Image >>> image = PIL.Image.open(r'C:\Users\Administrator\Dropbox\Desktop

问题 When reading a low-contrast image it automatically take this example: In [1]: from PIL import Image In [2]: import numpy as np In [3]: import matplotlib.pyplot as plt In [4]: img = Image.open('images/map.jpg') In [5]: arr = np.asarray(img) In [6]: plt.gray() In [7]: plt.imshow(arr) Out[7]: <matplotlib.image.AxesImage at 0x7f9c7e88f490> In [8]: plt.show() Input large Plot (no change this is automatic by matplotlib.) large Because this input is different from the plot without, modifying