Know How Transfer

The Hub Blog

About Photography, Videography, Color Correction and Pre-press

Here you’ll find a rich collection of topics, tips and essays about every aspect of photography and digital imaging. There’s something here for everyone from the beginner to the advanced user.
We strongly encourage you to comment on the articles and share your experience.

New post will be added in the next few weeks. Stay tuned!

ALCE test Action | Understand How Radius Works

ALCE test Action is a Photoshop action which automatically creates eight ALCE layers with different radius values, from 1 to 350. You can choose ALCE to be applied with or without Turbo (Softer) option to see the difference between the two methods. From the direct comparison between the different layers you will learn how different values works better than every theoretical explanation.

VitaminBW: a Steady Path to Black-and-White

Black-and-white is pleasure and pain for any photographer – even those who don’t actually use it. About six months ago I stumbled into an interesting technique to convert a color image to B&W and wrote an article about it: it was Gorman-Holbert’s method. Such article spawned two more, one of which further expanded this technique.

ALCE and 360° panoramic images

Two suggestion for ALCE processing of equirectangular images to be used building 360 degree panoramas. By Davide Barranca Equirectangular images, the ones used to build those beautiful, immersive, 360 degrees panoramas, may require some extra attention with ALCE , in...


A false profile (that is, a profile with a non-standard gamma value) can be expressed as pencil-drawn curves generated by Photoshop. While this has little practical relevance, it allows us to understand what assigning a false profile actually does to an image by simply inspecting the shape of a curve.

The False Profile – Multiply Technique

The False Profile – Multiply TechniqueAdvance techniques combining False Profile with Multiply Blend Mode in Photoshop: the False Profiles technique, the Multiply technique, Multiply + False Profile combined, mask options and more

Dan Margulis on Italy and RBG

The truth is that it is a land of love and great beauty, made all the more beautiful professionally by seeing the new and sophisticated imaging algorithms being developed by Davide with Marco Olivotto, and by seeing how Alessandro, Daniele Di Stanio, Tiziano Fruet and others have brought first-class color instruction into a country where it was rarely found previously.

Larry Lourcey on ALCE: New Way To Enhance Contrast

ALCE2 is a deceptively easy tool that enhances the contrast of an image to really give it some punch. Unlike some filters that have hundreds of options and boxes to click – this one is simple: just one slider. You dial in the amount of effect you want and off it goes. Best of all, it records the setting you used – right in the layer name – so you can actually recreate the look later. This was a huge plus for me!

Better Digital Camera Magazine: A Local Contrast Enhancer | By Nick Rains

I use ALCE as part of my main workflow. Very few images will not benefit from a bit of a boost and, remember, what you see on your screen will be much more contrasty than a print. Giving an image a quick once over with ALCE will lift your print quality without a shadow of a doubt. Nick Rains ***Highly recommended.

3F | The revolutionary professional scan system by Hasselblad

In 2000 Imacon, now Hasselblad, created a new proprietary format for the Flextight 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. A 3F allows one to obtain a file similar to a raw file from analog original.

Notes on Sharpening

Sharpening with Gaussian and edge-aware blurring kernels; a new experimental approach on High-Radius Low-Amount sharpening; how to separately target edges and texture in the same high frequency range. Gaussian, Bilateral and Mixed pyramid decompositions, efficient platforms on the top of which new sharpening strategies can be developed.