Legacy ImageMagick Discussions Archive

convert -density 400 in.svg -resize 300x300 out.png I thought about doing that, but it seems like a waste of CPU and memory. It runs the risk of undersampling (e.g. rendering a 16x16px SVG to a 300x300 PNG) or eating up too much memory (e.g. rendering a 10x10m SVG to a 300x300 PNG). The first ...

I would like to convert an SVG into a PNG and enlarge it to a specific size in the process (e.g. to 300px on the longest side). However, simply doing convert -resize 300x300 in.svg out.png gives poor results because the image becomes pixelated. Can I get IM to render it with the correct density for ...

There is no way to know if Javascript code, if any, will ever finish running.

It's hard to tell by the vague description of your application, but if all you want to do is extract the un-resized images themselves from the PDF, you can use xpdf or poppler's `pdfimages` command which extracts all images from a pdf as ppm or jpg without doing any PDF rendering. You can then ...

Sorry if I'm bumping this from too long ago. I'd like to point out that counting PDF pages with ImageMagick can be more intensive than you think. Even if you use identify instead of convert, ghostscript will still crunch through the entire PDF. If it's a big PDF, you might just find your CPU maxed ...

According to the PNG specification ( http://www.w3.org/TR/PNG/#11pHYs ), the pHYs field contains pixel dimensions on the X and Y axis along with a unit specifier. This unit specifier has two options: none, and metres. So if I understand this correctly, you can either set pixel/metre or the aspect ...

I was just about to come here and post about the same problem. It seems that IM doesn't embed images in PDFs in their native bit depth. I received a PDF of scans (black and white, 1bit/px). Burst it with pdfimages into PBM. Converted it into PNG (still 1bit/px). Ran "convert *.png pdf.pdf". The ...

There is not concept of DPI in a PDF file as far as I know. There are page dimensions, while everything else should be vectors.

Erm, I meant that in this particular case, my files are named page00.png, page01.png, etc.

I understand the implications of using mogrify, and it is clearly modifying my files when I run the command. It just isn't setting the resolution.

I'm trying to change the resolutions of a batch of PNG files. Right now, they are at 72dpi, but they need to be set to 300dpi (no rescaling). This is because the dpi is used when I convert them into PDF, resulting in incorrect PDF page sizes. I try mogrify -density 300x300 page*.png but nothing ...