topic Re: Resize/Resample quality query in Tech Help - Software/Hardware etc

Resize/Resample quality query

shutter — Sat, 05 Aug 2023 13:42:57 GMT

Using IRFANVIEW, to resize some .jpg pics to increase the mpx count

On the resize box there is a Resample area with various methods listed.

As you can see, Lanczos ( slowest ) is selected. I am assuming, as it is the slowest that it would give the best quality in the resample.

Would that be a correct assumption, or is there a better quality option in the list showing ?

Re: Resize/Resample quality query

shutter — Sat, 05 Aug 2023 18:32:27 GMT

With regard to the mpx count... that has been solved !. but I would still like to know about the quality of those listed.

Thanks

Re: Resize/Resample quality query

RobPN — Sat, 05 Aug 2023 19:08:42 GMT

https://www.google.com/search?q=irfanview+resample+filters+hermite+vs+triangle+vs+bell+vs+mitchell+vs+b-spline+vs+lanczos

Re: Resize/Resample quality query

RPMozley — Sat, 05 Aug 2023 21:50:26 GMT

As a rule of thumb the quality does increase as you go down the list. The more nuanced answer is that it’s very much dependent on the picture/photo in use and depending on the contents you may actually get a “better” result from one of the other algorithms.

Re: Resize/Resample quality query

shutter — Sun, 06 Aug 2023 07:02:15 GMT

@RPMozley ok Thanks for that .... I have tried different options, from time to tim..... but have never noticed any difference on my screen. ( 17inch laptop ) maybe it shows better on more sophisticated/powerful monitors.

I`ll leave it at the default.

Thanks