Recreate ImageMagick script to Photoshop Action

Discuss digital image processing techniques and algorithms. We encourage its application to ImageMagick but you can discuss any software solutions here.
alexlsg
Posts: 45
Joined: 2016-08-03T08:04:20-07:00
Authentication code: 1151

Re: Recreate ImageMagick script to Photoshop Action

Post by alexlsg » 2016-09-05T10:29:20-07:00

Hey Snigbo, this is a ZIP with 32 bits EXR files of the absolute + absolute distorted map.
https://www.dropbox.com/s/mymw7b41mxlya ... e.zip?dl=0

Would be uber helpful if you can make the relative map, so I can make another test with a MUCH better map! ; )

Can you send the map back in EXR? Then I can do the PNG export inside Photoshop.
What setting do you recommend to use the file on the web? PNG 24?

alexlsg
Posts: 45
Joined: 2016-08-03T08:04:20-07:00
Authentication code: 1151

Re: Recreate ImageMagick script to Photoshop Action

Post by alexlsg » 2016-09-05T10:43:22-07:00

Also, is your mug example image, a relative map? I am looking for a pixel perfect relative map so I can evaluate the my SVG fedisplacement filter accuracy
https://gyazo.com/fcb2fd5d992d1c059ab413b16f36fbd7

User avatar
fmw42
Posts: 22105
Joined: 2007-07-02T17:14:51-07:00
Location: Sunnyvale, California, USA

Re: Recreate ImageMagick script to Photoshop Action

Post by fmw42 » 2016-09-05T11:10:13-07:00

My understanding is that Imagemagick only supports EXR "half-format" 16-bit floating point per pixel channel. But I only tried in Q16 HDRI. Perhaps Q32 HDRI will support the full EXR format. See http://www.openexr.com/index.html. You could use 32-bit floating point TIFF if in HDRI IM. See http://www.imagemagick.org/script/formats.php

snibgo
Posts: 9403
Joined: 2010-01-23T23:01:33-07:00
Authentication code: 1151
Location: England, UK

Re: Recreate ImageMagick script to Photoshop Action

Post by snibgo » 2016-09-05T11:22:12-07:00

ImageMagick "identify" says your EXR files are 7500x7000 pixels but only 16 bits/channel.

I have said that for such sizes, for best quality, you need 32 bits/channel.
alexlsg wrote:What setting do you recommend to use the file on the web? PNG 24?
No. For web images, I recommend at least 16 bits per channel, which is PNG48.
alexlsg wrote:Also, is your mug example image, a relative map?
No. As the text on that page says, it uses absolute displacement maps.

On this thread I have shown the ImageMagick command to convert from absolute to relative, and converted one of your maps. If you want any more, I suggest you install ImageMagick and create them yourself.
snibgo's IM pages: im.snibgo.com

alexlsg
Posts: 45
Joined: 2016-08-03T08:04:20-07:00
Authentication code: 1151

Re: Recreate ImageMagick script to Photoshop Action

Post by alexlsg » 2016-09-05T12:05:28-07:00

"If you want any more, I suggest you install ImageMagick and create them yourself."
I know I am asking "too much" this is why I offered to make a donation. I would certainly do it in IM if I knew how to do it! ; )
Ive been trying to do it myself, but I am not a programmer. Can we arrange a fair value so you can help me make the pixel perfect displacement?

"I have said that for such sizes, for best quality, you need 32 bits/channel."
Yep, I know. I saved them as EXR 32 bits/channel in PS. Weird...

alexlsg
Posts: 45
Joined: 2016-08-03T08:04:20-07:00
Authentication code: 1151

Re: Recreate ImageMagick script to Photoshop Action

Post by alexlsg » 2016-09-05T12:07:46-07:00

"for best quality, you need 32 bits/channel."
Someone mentioned to me that it would not matter because SVG filter would render only 8 bits per channel. Does it make sense?

Post Reply