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8. Bilateral and WLS Pyramids
We are allowed to use different blurring kernels, the equations of pyramid decomposition still work. Get a look, for instance, to the better SB:
(Fig 8.1) SB1(O) (Radius=2;Threshold=6), SB2(O) (R=3,T=10), SB3(O) (R=7,T=15)
(Fig 8.2) Difference layers D1, D2, D3 (I used SS1 to make them more evident).
(Fig 8.3) Result with Bilateral Pyramid decomposition for sharpening.
Can you spot the difference between Bilateral (read: which uses SB) and Gaussian pyramid equalizers? Maybe not that much here, but if youâll use one of your (high res, maybe high bit-depth) pictures, youâll ïŹnd that being edge-aware, the Bilateral pyramid shows little or no halos, which is quite a remarkable feature in my opinion. Shadow/Highlights with SB (instead of GB) in its âengineâ gives the same halo-free look by the way.
As Iâve said before,WLS ïŹlter is a much better edge-aware smoothing operator, therefore it can be used for even better enhancements (have a look to the website of WLSâ creators for examples). Adobe, anyone listening? :-)
A simple yet powerful Photoshop tool to effectively boost the local contrast of an image, by means of a smart algorithm which avoids the clipping issues typical of methods like shadows/highlights. The user interface is simple and clean, with just one slider, allowing the user to customize the effect in a straightforward way.
In 2000 Imacon, now Hasselblad, created a new proprietary format for the Imacon scanners, the Flexible File Format or fff. 3F has determined the biggest revolution in the field of original analog scanning since the introduction of the drum scanner.
First of all forgive us the word play, which might come off as presumptuous. However, we felt like we came up with something that perfectly summarizes our philosophy in this arena by uniting the concepts of high resolution and quality reproduction.