Filter

From Eclat-Digital Ocean 2014 Documentation
Jump to: navigation, search
filter-2014.png

A postprocessing filter performs a post treatment step on the buffer image. They are chained in the postprocessing node, which defines the full post treatment.



Average auto gain

This filter automatically adjust the image exposure, by applying a linear gain. The gain value is calculated to provide 18% average luminance over the image.

Average auto gain reference


Gain

This filter multiplies all values by a constant gain.

Gain reference


ISO sensitivity

This filter applies the gain defined by an ISO Standard Output Sensitivity(SOS), corresponding to the user-selectable gain on a digital camera.

ISO sensitivity reference


Histogram auto gain

This filter automatically adjust the image exposure, by applying a linear gain. The gain value is calculated to so that the maximum number of pixels is inside a defined good luminance range.

Histogram auto gain reference


Reinhard global

This filter is a tone-mapping filter. It compresses highlights and over-exposed pixels of the image to improve its dynamic range, in a similar way to film or digital cameras.

Reinhard global reference


Reinhard local

This filter is a tone-mapping filter. It compresses highlights and over-exposed zones of the image to improve its dynamic range. It detects dark and bright areas and applies different compressions to them, similarly to traditional dodging-and-burning photography techniques.

Reinhard local reference


Smart clamp

This filter clamps image values over 1.0 for LDR image encoding, with some quality improvements over plain clamp.

Smart clamp reference


Sphere resolution fix

This filter fixes the high noise level caused by the equirectangular projection at the upper and lower parts of spherical renders

Sphere resolution fix reference


XYZ to RGB

This filter does the color-space conversion from XYZ to linear RGB.

XYZ to RGB reference


See also

Node types