Search found 5 matches

by imbennu
2015-12-21T08:15:44-07:00
Forum: Users
Topic: Gaussian-blurring equirectangular panoramas
Replies: 4
Views: 8692

Re: Gaussian-blurring equirectangular panoramas

Thank you, I tested a bit this approach (1) and also with polar -> blur -> depolar (2) double split approach (polar is applied to original img and flipped img, then both blurred, then combining top halves) The (2) gives me correct and perfect results on poles, but unfortunately produces some issues ...
by imbennu
2015-12-13T08:49:07-07:00
Forum: Users
Topic: Gaussian-blurring equirectangular panoramas
Replies: 4
Views: 8692

Gaussian-blurring equirectangular panoramas

Hi all, since there is not so much around about this specific task of consistently blur an equirectangular image (ratio 2:1), here I am to ask what can be automatised via IM and what's my current status. http://s3.postimg.org/5xxq4pyrn/eq_gaussblur.jpg First off, before applying a gaussain blur ...
by imbennu
2015-11-16T17:24:44-07:00
Forum: Users
Topic: Extracting highlights from HDR image
Replies: 6
Views: 4017

Re: Extracting highlights from HDR image

Yep, I tried also threshold...
But gamma gave best results,

Code: Select all

( -clone 0 -colorspace Gray -gamma 0.1 )
using very low values around 0.1 and then converted to grayscale.

Thanks!! :)
by imbennu
2015-11-16T16:04:59-07:00
Forum: Users
Topic: Extracting highlights from HDR image
Replies: 6
Views: 4017

Re: Extracting highlights from HDR image

try just using the grayscale image as a mask. Unix syntax: convert image \( -clone -colorspace gray \) -compose multiply -composite result You can apply other operators such as -gamma, -levels or -sigmoidal-contrast to the grayscale image if that helps. I'm trying this, I'm on windows so I removed ...
by imbennu
2015-11-16T14:45:46-07:00
Forum: Users
Topic: Extracting highlights from HDR image
Replies: 6
Views: 4017

Extracting highlights from HDR image

Hi all, Maybe a very basic question, but after googling a bit, I found no example on this specific kind of operation. Basically I'd like to extract highlights from input HDR image (*.hdr) to a PNG (or JPG) As an example, lets imagine the typical sunny landscape: the produced map should only have a ...