Improve quality of Wand conversion

Question

I convert files of different formats (JPEG, PNG, TIFF, PDF) to JPEG using Wand, a ctypes-based ImageMagick binding for Python. The resulting files are very low-quality. If there is text in original file, it becomes almost unreadable in the resulting file.

Before Wand i used Imagemagick console commands, and with the option -density i could achieve great quality. For example: convert -density 200 file.pdf file.jpg.

What is the most idiomatic way to improve image quality of the resulting image file in Wand? Or, at least, how do i set the density option in Wand?

Estimate

Answer 1

This would help you. Pass resolution option to the constructor of Image e.g.:

with Image(filename='file.pdf', resolution=200) as image:
    image.compression_quality = 99
    image.save(filename='file.jpg')

Aeromedical

I am using wand to resize the image to decrease its size, but I keep getting images with bigger sizes sometimes with a lot bigger sizes. How to fix this? – Cyanogen

For posterity, the default resolution is 72. Units are pixels per inch. The result is not aliased, so the choice is between huge files or pixelated curves. – Nikos