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Banding Fix

Banding Fix Effect fixes banding due to limited 8-bit color or highly compressed sources.

Banding Fix Effect fixes banding due to limited 8-bit color or highly compressed sources.

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$30.00

Support email is anmol(at)prosya.com

Online support is at www.prosya.com/community/

Banding Fix Effect fixes banding due to limited 8-bit color or highly compressed sources. Two presets are provided to fix banding in the sky due to 8-bit compression. The effect can also be used to mitigate the effect of pixelization due to excessive compression.

The filter detects regions that have banding and smooths the transition between the colors. Remember that film has infinite color gradation and will never show pixelization. The Banding Fix filter tries to mimic this property. To understand the effect, use the AE Levels filter to check the histogram before and after applying the Banding Fix filter.

Use the sky inside a new comp. The banding will often not be visible on 8-bit monitor but will show if you print or view on 10-bit or HDR screen.

To see the banding on your screen, add an adjustment layer with 2 levels effects and isolate the blue channel.

Before applying the effect, a frame with banding will show discrete steps. After the filter is applied, the gaps are ”filled in”.

There are 2 presets to get you started, the ”Sky Mild” will work for most, use the ”Sky Strong” only where you can mask out the regions with banding.

The controls allow you to switch between RGB, HSL, YIQ and YUV colorspace. This effect can also be used to fix the banding show in Red and Blue colors due to YUV 4:2:0 compression.

Controls :

Channel – Switch between RGB, HSL, YIQ and YUV colorspace. Default is RGB.

Layer Blend Ratio – Define the amount of effect you wish to use. At 100% the entire effect is active, and none at 0%. Default is 100%.

View Colorspace – The allows you to view the intermediate colorspace before it is converted to RGB for display. This is only useful for HSL, YIQ and YUV colorspace. Default is off.

Horizontal-Vertical Blend – The filter fixes the banding in horizontal and vertical direction in discrete steps and blends it together. You may choose non-default values for creative effects. Default is 50%.

The 3 sections indicate the 3 channels for the colorspace in use. For RGB, these are Red, Green and Blue. For HSL – Hue, Sat and Lightness. For YIQ – Luma, I-Chrominance and Q-Chrominance. For YUV – Luma, U-Chrominance and V-Chrominance.

Detection Limit – The minimum change in color to detect banding. The value is a percentage of the total color range i.e. 0-255 for 8-bit. Default is 20%

Detection threshold – Banding is indicated when a block of pixels is followed by another block with a certain change across their boundary. This value indicates minimum block size. Default is 4.

Horizontal Smoothing – Once banding is detected the edges are smoothed out to mimic the film color gradation. This value is the maximum number of pixels across horizontal block boundaries that should be used for smoothing.

Vertical Smoothing – Once banding is detected the edges are smoothed out to mimic the film color gradation. This value is the maximum number of pixels across horizontal block boundaries that should be used for smoothing.

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Download the zxp file. The zxp package has been tested with automated install methods like Anastasiy's Extension Manager or ZXP Installer.

After Effects plug-ins will have a plug-in .aex file and a pdf for documentation. The installer will extract .aex file to the mediacore directory – $mediacoreplug-ins\Prosya\ and the pdf to $userhomefolder/Documents/Prosya/

In windows – $mediacoreplug-ins looks like C:\Program Files\Adobe\Common\Plug-ins\7.0\MediaCore and $userhomefolder/ looks like C:\Users\

After successful install, Prosya plug-ins will appear under the Prosya folder inside the ‘Effects' menu or under the ‘Effect & Presets' tab in After Effects. If automated install does not work, try the manual installation. Manual installation also works if the plug-in is distributed as a .zip file.

Install 7-zip or any similar unzip utility. Right Click on the .zxp or .zip and click 7-zip->Open Archive.

Double-click on Win/ directory to view the .aex file. Extract .aex file to the mediacore directory – for example, C:\Program Files\Adobe\Common\Plug-ins\7.0\MediaCore

Double-click on Docs/ directory to view the .pdf file. Extract .pdf file to the Documents directory – for example, C:\Users\Administrator\Documents\

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