I'm currently looking at using the python package PyMuPDF for a workflow that converts PDF's to images (In my case, .TIFF files).
I am trying to mimic the behaviour of another program that I currently use for PDF -> Image conversion. In that program, it lets you set the settings for imaging as below:
Image Output Quality (DPI): (Defaults to 300dpi)
Basic Image Size: Original setting - renders the image with the original document settings.
My question is, is this possible within PyMuPDF? How can I set the output DPI for my images to 300 and set the image size to the original document size? I am quite new to dealing with this sort of processing for PDF's/images so any help would be much appreciated.
Thanks in advance,
PyMuPDF is wrapped around MuPDF
It has many powerful pdf manipulation options which include the ability to set page scale and resolution of page image outputs.
However MuPDF does support Tiff input but not natively export to single or multipage Tiff, thus would need an additional conversion from say multiple PNG which is native.
The range of current inputs and outputs
Input Output Description
JPEG - Joint Photographic Experts Group
BMP - Windows Bitmap
JXR - JPEG Extended Range
JPX - JPEG 2000
GIF - Graphics Interchange Format
TIFF - Tagged Image File Format
PNG PNG Portable Network Graphics
PNM PNM Portable Anymap
PGM PGM Portable Graymap
PBM PBM Portable Bitmap
PPM PPM Portable Pixmap
PAM PAM Portable Arbitrary Map
- PSD Adobe Photoshop Document
- PS Adobe Postscript
to export to tiff you would need say PIL/Pillow along the lines of
from PIL import Image
import fitz
pix = fitz.Pixmap(...)
img = Image.frombytes("RGB", [pix.width, pix.height], pix.samples)
img.save("output.tif", "TIFF")
However for storing single pages to muti-page you will need to experiment with PILlow settings.
[Update]
I see you asked this question in PyMuPDF and for others benefit the answer was
Sounds like you will create a so-called "pixmap" for each page and save that as an image. PyMuPDF itself only support a handful of image output formats, the most popular being PNG, others are the PNM-type images. If you want to use others, you must use an additional package, presumably PIL/Pillow. PyMuPDF supports Pillow directly via its pixmap output methods. So a code snippet may look like this:
import fitz
mat = fitz.Matrix(300 / 72, 300 / 72) # sets zoom factor for 300 dpi
doc = fitz.open("yourfile.pdf")
for page in doc:
pix = page.get_pixmap(matrix=mat)
img_filename = "page-%04i.tiff" % page.number
pix.pil_save(img_filename, format="TIFF", dpi=(300,300), ... more PIL parameters)
For more sophistication on PIL output, please consult their documentation. For example, TIFF supports multiple images in one file.