[Question] How to predict the page size of the resulting document (in PDF units)?

mara0004 commented

2021-05-04 10:44:35 +00:00

Contributor

Is there a way to reliably predict the size of the resulting PDF page based on the image size?

josch commented

2021-05-04 11:30:41 +00:00

Owner

By default (if --border or --pagesize and similar options are not used) the size of the page is equal to the size of the image, using the dpi value embedded in many image formats. If an image does not contain a dpi value in its metadata, then the default dpi value is 96. This is also all explained in the --help output. Can you point out where the current documentation is missing or unclear with respect to your question?

By default (if `--border` or `--pagesize` and similar options are not used) the size of the page is equal to the size of the image, using the dpi value embedded in many image formats. If an image does not contain a dpi value in its metadata, then the default dpi value is 96. This is also all explained in the `--help` output. Can you point out where the current documentation is missing or unclear with respect to your question?

mara0004 commented

2021-05-04 14:09:43 +00:00

Author

Contributor

Thanks for the explanation. Actually the documentation is pretty clear, I simply overlooked the relevant passage. Sorry.

mara0004 closed this issue

2021-05-04 14:09:45 +00:00

mara0004 changed title from ~~[Question] How to predict the page size of the resulting PDF?~~ to [Question] How to predict the page size of the resulting document (in PDF units)?

2021-05-04 14:17:22 +00:00

F04 commented

2024-01-16 16:30:18 +00:00

@josch How was 96 chosen?

josch commented

2024-01-16 18:17:08 +00:00

Owner

Good question. I'm not entirely sure anymore! There are a couple of software packages that have 96 as the default dpi. Do you have a good argument for a different value?

F04 commented

2024-01-16 18:53:48 +00:00

I could be a wisecrack and recommend 42. 69, or 98.6. But instead I have a more radical, and I think, reasoned idea for your consideration...

#189

I could be a wisecrack and recommend 42. 69, or 98.6. But instead I have a more radical, and I think, reasoned idea for your consideration... https://gitlab.mister-muffin.de/josch/img2pdf/issues/189

mara0004 referenced this issue

2024-08-27 15:17:40 +00:00

`convert()`: add option to get engine document (e.g. pikepdf.Pdf) #203

[Question] How to predict the page size of the resulting document (in PDF units)? #97