On Fri, 2024-03-08 at 23:21 +0700, Max Nikulin wrote: > On 08/03/2024 12:35, hw wrote: > > On Thu, 2024-03-07 at 23:15 -0500, Jeffrey Walton wrote: > > > > > > I have a USB thermal printer for the shipping labels, > > > <https://www.amazon.com/gp/product/B08V28J3JS>. > > > > This printer has only 300dpi. If you print QR-codes on it make sure > > you can scan them: they have to be large enough or get you an > > unscanable smear. > > I believed that 300dpi is high enough resolution for QR-codes of > reasonable size if source image has proper quality. On the other hand, > if possible, it is better to scale QR-codes to match some whole factor > of printer pixel size.
What do you consider a 'reasonable size'? The maximum possible size of the QR-code is limited by the size of the label. (Shipping labels are probably big enough ...) There is no source image other than whatever LaTeX creates. I can specify the size of the QR-code. Other than that, how do you apply scaling?
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