wand

问题 I want to convert an image so I can read it better using pyocr & tesseract. The Command line I want to convert to python is : convert pic.png -background white -flatten -resize 300% pic_2.png Using python Wand I managed to resize it but I don't know how to do the flattend and the white background My try : from wand.image import Image with Image(filename='pic.png') as image: image.resize(270, 33) #Can I use 300% directly ? image.save(filename='pic2.png') Please help Edit, Here is the image to

问题 I have a raw data string, for example like this: raw_data =

问题 I'm wondering what is the difference when I run a python program from PyCharm or from the command line. Actually I'm using a library called wand-py (ImageMagick binding). If I run my program from the command line it works. Though if I use PyCharm Run or debug it doesn't and I get the following traceback. /Users/alexisbenoist/Documents/python/papyrus/env/bin/python "/Applications/PyCharm CE.app/helpers/pydev/pydevd.py" --multiproc --client 127.0.0.1 --port 58993 --file /Users/alexisbenoist

问题 I'm having trouble figuring out how to write a basic sequence to an animated gif using Wand the ImageMagick binding. The basic convert ImageMagick commands I'm looking to reproduce in python: convert -delay 50 -size 500x500 xc:SkyBlue \ -page +5+10 /test/wizard.gif \ -page +62+50 test/wizard2.gif \ -loop 0 animation.gif 回答1: I was able to figure this out after all, by just passing the commands to terminal via os.system(): build = '''convert -delay 30 -size 500x500 \ -page +0+0 /Users/jkeilson

问题 Is there way to convert a png file into SVG file using only pure python or a python module such as wand? To be more precise, I want to convert a png into a real vector graphics, I don't want to embed a bitmap inside the svg, I want to convert into graphics code. I know this is possible with Illustrator or Inkscape, but I need an automated process. Thank you ! 回答1: You will need to run an external program to do the image tracing. A popular program is potrace. It is what Inkscape uses to

问题 Trying to load a PDF from the local file system and getting a "not authorized" error. "File "/env/local/lib/python3.7/site-packages/wand/image.py", line 4896, in read self.raise_exception() File "/env/local/lib/python3.7/site-packages/wand/resource.py", line 222, in raise_exception raise e wand.exceptions.PolicyError: not authorized `/tmp/tmp_iq12nws' @ error/constitute.c/ReadImage/412 The PDF file is successfully saved to the local 'server' from GCS but won't be loaded by Wand. Loading

问题 Using the +level ImageMagick operator (https://imagemagick.org/script/command-line-options.php#level) in command line will produce an output image with the channel values of the input image compressed to the range specified. For example, the following ImageMagick command will cause the output pixel intensity values to be present between 45% and 70% of the total pixel value range. magick input.jpg +level 45%,70% output.jpg How do you perform the +level ImageMagick operation in Wand? The wand

问题 I wanted to install the Python ImageMagick API wand and followed this site: http://docs.wand-py.org/en/latest/guide/install.html#install-imagemagick-on-windows However, when running a very simple test: from wand.image import Image I get the following output: Traceback (most recent call last): File "F:\PATHTO\Python34\lib\site-packages\wand\api.py", line 137, in libraries = load_library() File "F:\PATHTO\Python34\lib\site-packages\wand\api.py", line 107, in load_library raise IOError('cannot

问题 I wanted to install the Python ImageMagick API wand and followed this site: http://docs.wand-py.org/en/latest/guide/install.html#install-imagemagick-on-windows However, when running a very simple test: from wand.image import Image I get the following output: Traceback (most recent call last): File "F:\PATHTO\Python34\lib\site-packages\wand\api.py", line 137, in libraries = load_library() File "F:\PATHTO\Python34\lib\site-packages\wand\api.py", line 107, in load_library raise IOError('cannot

问题 I installed Imagemagic (both 32 and 64 bits versions were tried) and then used pip to install wand, I also set the Magick_Home env. variable to imagemagic address but when I run Traceback (most recent call last): File "<stdin>", line 1, in <module> File "c:\Anaconda2\lib\site-packages\wand\image.py", line 20, in <module> from .api import MagickPixelPacket, libc, libmagick, library File "c:\Anaconda2\lib\site-packages\wand\api.py", line 205, in <module> 'Try to install:\n ' + msg) ImportError: