Output image looks too sharp and aliased (compared to ptgui)

[Hyung Kim]

Hello, 

I have created little planet images from spherical images using Hugin 

and found out that the output image looks too sharp and aliased compared

to PTGui's version. (please refer to the attached image)

The spherical image is 12,000 x 6,000 and the little planet image is 900 x 900. 

I went through Hugin's GUI menu but I couldn't find related settings. 

Is there any way to handle this issue?

Any comment would be appreciated. 

Best Regards,

Hyung

[김상욱]

I have just found this link

- http://hugin.sourceforge.net/docs/manual/Aliasing.html

I think I should just downsize the sphere image before transforming to 

a little planet image. 

Best Regards,

Hyung

2019년 1월 29일 (화) 오후 4:42, Hyung Kim <everl...@gmail.com>님이 작성:

--
A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ
---
You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group.
To unsubscribe from this group and stop receiving emails from it, send an email to hugin-ptx+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/7a0ed2cb-22de-4ca1-babd-5f7c78a9b1c5%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Klaus Föhl]

Current versions of Hugin do not include anti-aliasing interpolators for the remapping stage.

A know work-around is to render not to 900x900 as you did but to a larger size, 3600x3600 for instance.

Then use a separate tool for downscaling. ImageMagick/convert for instance provides for proper filter kernels and linear color space when resizing:

convert input.jpg -colorspace RGB -filter lanczosradius -distort resize 900x900 -colorspace sRGB -quality 96 output.jpg

Best regards

Klaus