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ImageMagick wand not recognizing pdf image?


ImageMagick wand not recognizing pdf image?

By : user2951162
Date : November 18 2020, 01:01 AM
will be helpful for those in need So just to close the question, the problem is missing ghostscript library on mac, as indicated in my comment above:
code :


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How to extract PPM Image Properties from an ImageMagick Wand using C?

How to extract PPM Image Properties from an ImageMagick Wand using C?


By : Joel Manzanillo
Date : March 29 2020, 07:55 AM
To fix the issue you can do From ImageMagick Forum
code :
width = MagickGetImageWidth(magick_wand);
height = MagickGetImageHeight(magick_wand);
ppm->width = width;
ppm->height = height;
ppm->modval = 3 * width;
ppm->data = malloc (3 * width * height);
status = MagickExportImagePixels(magick_wand, 0, 0, width, height, "RGB",
            CharPixel, ppm->data);
Wand (imagemagick) draw colored points on top of greyscale sun raster image

Wand (imagemagick) draw colored points on top of greyscale sun raster image


By : Alex Amengual Borras
Date : March 29 2020, 07:55 AM
To fix this issue Here's what I have so far: , I think below is the best solution for this problem that uses Wand:
code :
from wand.image import Image
from wand.display import display
from wand.drawing import Drawing
from wand.color import Color
img=Image(filename='../../rmli_fr/rmli_fr.ave.ras')

color = Color('red')
draw = Drawing()
draw.fill_color = color
for i in pts_comp:
    draw.line((i[0], i[1]), (i[0], i[1]))
    draw(img)

img.save(filename='rmli.ras')
Wand + ImageMagick + Anaconda: "'wand' has no attribute 'image'"

Wand + ImageMagick + Anaconda: "'wand' has no attribute 'image'"


By : siklootd
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I'm having issues using these three together. I believe wand is not recognizing the ImageMagick libraries but I'm not sure. , Try this
code :
from wand.image import Image

with Image(filename=source_file, resolution=(RESOLUTION, RESOLUTION)) as img:
    pass
# wand/__init__.py
import api
import color
import compat
import display
import drawing
import exceptions
import font
import image
import resource
import sequence
import version
How can I run this command using wand-py and imagemagick

How can I run this command using wand-py and imagemagick


By : Sijina Aliyar
Date : March 29 2020, 07:55 AM
This might help you You'll need to bind methods from MagickCore, and MagickWand libraries. Keep in mind that Kernel performance can differ widely between systems, so don't be surprised if you hit a `Operation canceled' message when working with large density images.
code :
import ctypes
from wand.api import libmagick, library
from wand.image import Image

"""
Kernel info methods on MagickCore library.
"""
libmagick.AcquireKernelInfo.argtypes = (ctypes.c_char_p,)
libmagick.AcquireKernelInfo.restype = ctypes.c_void_p
libmagick.DestroyKernelInfo.argtypes = (ctypes.c_void_p,)
libmagick.DestroyKernelInfo.restype = ctypes.c_void_p

"""
Morphology method on MagickWand library.
"""
library.MagickMorphologyImage.argtypes = (ctypes.c_void_p,  # wand
                                          ctypes.c_int,     # method
                                          ctypes.c_long,    # iterations
                                          ctypes.c_void_p)  # kernel
"""
Enhance method on MagickWand library.
"""
library.MagickEnhanceImage.argtypes = (ctypes.c_void_p,)    # wand

# convert -density 500 hello_world.pdf
with Image(filename='pdf-sample.pdf', resolution=500) as img:
    # -quality 100
    img.compression_quality = 100
    # -monochrome
    img.quantize(2,       # Target colors
                 'gray',  # Colorspace
                 1,       # Treedepth
                 False,   # No Dither
                 False)   # Quantization error
    # -enhance
    library.MagickEnhanceImage(img.wand)
    # -morphology close diamond
    p = ctypes.create_string_buffer(b'Diamond')
    kernel = libmagick.AcquireKernelInfo(p)
    CloseMorphology = 9  # See `morphology.h'
    library.MagickMorphologyImage(img.wand, CloseMorphology, 1, kernel)
    kernel = libmagick.DestroyKernelInfo(kernel) # Free memory
    # hello_world.jpg
    img.save(filename='hello_world.jpg')
Changing a canvas size without rescaling image using Wand and ImageMagick

Changing a canvas size without rescaling image using Wand and ImageMagick


By : 何苑兰
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I'd like to make my images square without affecting their aspect ratio, so I need to pad out the canvas size for example to make the height as large as the width and then I can rescale the image. I don't see a smart way of doing this. I had a look in the docs, but didn't see anything: http://docs.wand-py.org/ , If you start off at the commandline with an image like this:
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