I need to generate a PNG file of an image composed in LibreOffice Draw. When I export to PNG directly, the quality is almost perfect, but it's just slightly blurry. However, when I export directly to a PDF with lossless compression, the quality is perfect --- just not in PNG format.
The dimensions of the image are 495x304. Whenever I try to convert the "perfect" PDF file to a high-quality PNG file, the PNG file at 100% magnification (as viewed in evince) is about 2-3 times larger than the image in the PDF file. Or, when I get the PDF converted to PNG at approximately the correct dimensions, the PNG file is too sharp.
I have tried commands like this
gs -sDEVICE=pngalpha -sOutputFile=new.png -r144 image.pdf
convert -quality 100 -density 300 image.pdf new.png
But neither command renders a PNG with quality as good as the PNG that can be directly exported to in LibreOffice Draw.
So, my question is how to do either of the following: (1) export to better quality PNG directly from LibreOffice Draw; or (2) convert the perfect quality PDF to PNG with comparable quality and same dimensions.
And here are the export settings I'm using when exporting directly to PNG: