wand

问题 I have imported wand using the following code from wand.image import Image as WandImage from wand.color import Color with WandImage(filename=source_file, resolution=(RESOLUTION,RESOLUTION)) as img: img.background_color = Color('white') img.format = 'tif' img.alpha_channel = False How can i convert img object to open cv (cv2) image object in python? 回答1: You would simply write to a byte-array buffer, and pass to cv2.imdecode . from wand.image import Image as WandImage from wand.color import

问题 I'm trying to convert a PDF to PNG - this all works fine, however, the output image is still transparent even when I believe I have disabled it: with Image(filename='sample.pdf', resolution=300) as img: img.background_color = Color("white") img.alpha_channel = False img.save(filename='image.png') The above produces the images but are transparent, I also tried the below: with Image(filename='sample.pdf', resolution=300, background=Color('white')) as img: img.alpha_channel = False img.save

问题 I need to convert files to tiff where photometric is set "min-is-white" (white is zero) to comply with the required standards. I'm using Wand to interact with Photomagick but every I save a bilevel tiff file, it creates a min-is-black. How can I get Wand to saves it where White is Zero? Is it even possible? 回答1: Mark's comments are correct. You need to set the -define property for ImageMagick. For wand, you'll have to extent the core wand.api.library to connect MagickWand's C-API

问题 So I have installed Wand, Ghostscript, ImageMagick. I am trying to convert a PDF to Image. My Code is as following. Code: from wand.image import Image image_pdf = Image(filename="/<fullpath>/xyz.pdf", resolution=500) image_jpeg = image_pdf.convert('jpeg') print (len(image_jpeg.sequence)) When I run the code through terminal (I mean open python terminal and paste the code there), it works. But the same code fails in PyCharm. Error: File "/usr/local/lib/python2.7/site-packages/wand/resource.py"

问题 As per hint from here, I tried to create a gif with 2 dissimilar images as below. It works, but one frame is not disappearing to show another frame. Why would this happen and how to rectify? from wand.image import Image as Image2 with Image2() as wand: # Add new frames into sequance with Image2(blob=d2) as one: wand.sequence.append(one) with Image2(blob=d3) as two: wand.sequence.append(two) # Create progressive delay for each frame for cursor in range(2): with wand.sequence[cursor] as frame:

问题 I need to convert PDFs with multiple pages to a single unanimated gif where the pages will be one below the other using Python 3 and ideally Wand. I have tried doing this with the following code, however, the gif is still animated so that individual pages behave like frames of an animation. Here is my current code: (PDFfile is the location of a PDF, GIFfile is the location that I want to save the unanimated gif) from wand.image import Image with Image(filename = PDFfile) as img: Pages = []

问题 I'm using Python 3 to process a file produced by microscope, which is essentially a collection of thousands of Jpeg XR compressed images. I need to read all of them into memory. Now I'm reading data in binary mode, saving them in .jxr file and call JxrDecApp.exe to convert it to tiff and read it back to memory. This apparently is a major bottleneck to performance because it involves a lot of file read and write. From what I gather, ImageMagick also delegates this task to JxrDecApp.exe. So

问题 I'm trying to composite two images with Wand. The plan is to put image B at the right hand side of A and make B 60% transparent. With IM this can be done like this: composite -blend 60 -geometry +1000+0 b.jpg a.jpg new.jpg But with Wand I can only see the following with the composite() method: operator, left, top, width, height, image . Is it possible with Wand? 回答1: For the side-by-side to complete the -geometry +1000+0 , you can composite the images side by side over a new image. For this

问题 I have 3 images need to composite together, but the result dose not same as original result from AfterEffect compositing. In AfterEffect , i need to use 32 bit image depth to do some composite , i have try the ImageMagick, the result is correct, i can do it in batch command but i have large layer need to do and the process time is quite long, then i do it in python Wand think i can speed up the time, but i stuck on this, the composite calculation look clamp all negative value. How can i get

问题 So, I'm using Wand Python Library to mess around with some images. I just want it to look at an image, pixel by pixel, and for each pixel that is a specific color, say '4d4d4d', replace that pixels color to something else, like '#00ff00'. That's it. I've thoroughly scoured the documentation and I can't for the life of me figure out how to do this. 回答1: If anyone is interested the python code would be something like this: from wand.image import Image from wand.drawing import Drawing from wand