Wayback Machine revealed an original Bibble reference (roughly translated from French). I'm a little bit wiser now.
Overview
One of the most important needs among the photographers that we are is to be able to adjust the sharpness of our artistic pictures. For this Bibble just offers an unfortunate little cursor of nothing at all in the Standard tab :
Overall, this basic accentuation in Bibble 5 does its job well (it is customary in Bibble Innocent) but we may want to go further, much further, level of accentuation of sharpness.
Under Bibble 4 there was a great module : Sharpie, but the former famous Sean Puckett, great graft creator for Bibble 4 has visibly retired (I believe he did not support the transition to B5 Pied de nez) and therefore, more Sharpie. Never mind, Spoilerhead is working on a simply great module, based himself on a plugin for The Gimp, I named Wavelet Sharpen (WS for friends).
To finish this preamble let's see what says the "Bouillot" about accentuation :
Accentuation (filter d ')
Very common in image processing software, the accentuation filter increases the contrast between the contours pixels, which reinforces the apparent sharpness of the image.
The rest of this article is largely based on the doc (in English) provided by the creator of the software.
Preamble notes :
In this article the words accentuation, sharp and reinforcement will be used interchangeably.
Always evaluate the accentuation with a magnification factor of 100% (Ctrl + Alt + 0 in B5).
If the rendering of your exported files is different from what you expected, check that the output accentuation is well positioned to "None" within the parameters of the processing line you are using (double click on the name of the queue to access the parameters) :
After experimenting with this excellent module, you will probably want to do some pre-setting for your favourite boxes to access it in a single click.
GradientThe Gradient filter works from gradient analysis and then tries to make them more important, without creating overshoot or halos.
This filter works better at moderate intensities to reduce the slight de-accentuation introduced by the anti-rendering filter (anti-aliasing - moire) sensors. Too high values can cause posterization and watercolour effects because it will also accentuate thick gradients.
After the gradient accentuation filter comes a micro-contrast improvement phase which tries to pronounce the accentuation of the textures. Here too, it is advisable to remain modest in the settings (between 5-10).
Strength (Gain) : edge spacing
Width / Iter : Width of the gradient
Microcontrast : strengthens the micro-contrast of areas with no edges, modest values (5-10) will give better results. The high values will especially reinforce only the noise and the artifacts of ranting.
USM (Unsharp Mask) has been integrated into WS as a means of improving local contrasts (Local Contrast Enhancements - LCE, aka Clarity - Clarity). Of course it can also be used as an accentuation tool, but Wavelet filters are generally more efficient.
The USM works by adding an image version high pass filtered.
Refer to en.wikipedia.org/wiki/Unsharp_mask to find out more.Grain : filter intensity
Radius : the filter radius is an arbitrary unit. Allows you to control the amplitude of the effect.
Threshold : the threshold is an arbitrary unit, changes lower than the threshold will not be applied, use this cursor to reduce the impact of noise.
Clarity mode : the homogenization behaviour is dependent on the original brightness. l.
Wavelet SharpenWavelet Sharpen is the raison d'être of this fantastic module. It is presented twice to allow two pass of accentuations. This algorithm works as a slightly more successful version of the classic USM filter (re Clin d'œil).
Wavelet Sharpen sliders
Amount : filter intensity, a high value gives sharper edges but also more halo effects.
Radius : the radius is an arbitrary unit which controls the spatial frequency which will be reinforced.
Edge : Control the detection of the edges of the filter. A value of 0 disables edge detection. A value of 100 corresponds to a total detection. Between the two the effect is linear.
S + P Reduction : on some WS images also reinforces the noise level which gives a noise of salt and pepper. If you observe this, activate this option.
If after activating this filter you see a lot of noise or halo, position the Bibble accentuation at 0.
Finally, remember that you can use this module (like the others elsewhere) in a layer and therefore apply its effect only to an area of the image.
If after that you still have blurred photos, it is because you did it on purpose and it will therefore be an artistic
