The Banty's Toolkit is a collection of plug-ins for HDR Shop 1.0.3 (works with HDR Shop 2.0) and PictureNaut. There're 22 plug-ins: AbsHDR (automatic calibration of HDR images), Bilateral, Drago Tone Mapping Operator, Scan Tone Mapping Operator, EriKate Tone Mapping Operator, ExpLog, Greg, Diffuse SH, MedianCut, Gaussian Motion Blur, Maxedin (Maximum, Median, and Minimum filters), FakeHDRI, Sky, MyFilter, etc.

 

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Median Cut: it is a plug-in which generates directional lights from an HDRI (panoramic format). The algorithm is based on the paper "A Median Cut Algorithm for Light Probe Sampling" by Paul Debevec of Siggraph 2005. The plug-in creates a .txt file with light's parameters. Now this plugin creates a MaxScript that makes possible to import lights in 3DStudioMAX (raytrace shadow or shadowmap)



Diffuse SH: it is a plug-in which calculates diffuse convolution of an image (longitude-latitude panoramic format). It speeds-up complexity to O(n) against O(n^2) of the naive algorithm implemented in HDR Shop 1.0.3. The algorithm is based on the paper "An Efficient Representation for Irradiance Environment Maps" by Ravi Ramamoorthi and Pat Hanrahan of Siggraph 2001. In the example the computational time is less than a second with an 512x256 HDRI, against the six hours expected using the naive algorithm. Moreover, this plugin creates an ASCII file with Spherical Harmonics coefficients



Fake HDR Images: it is a plug-in expands the dynamic range of an LDR image to generate an HDR image. It gets as input the range of value to change, and the maximum desired intensity, wich will be interpolated linearly



Bilateral: it is a plug-in which applies the bilataral filter to an image. This filter smoothes an image keeping edges. This plug-in can apply a not approximated version only on the luminance channel, and an approximated version (two 1D bilateral filters) on all channels



Sky: it is a plug-in which creates a sky envorinmental map. There are four available model of sky: CIE Standard Overcast Sky, CIE Clear Sky, CIE Partially Cloudy, Preetham Sky: "A practical analytic model for daylight" byA. J. Preetham, Peter Shirley and Brian Smits. Siggraph 1999



Fake HDR Images: it is a plug-in expands the dynamic range of an LDR image to generate an HDR image. It gets as input the range of value to change, and the maximum desired intensity, wich will be interpolated linearly



NOTE: The HDR environment map "Ecualiptus Grove" and the HDR image "Memorial Church" are property of Paul Debevec, and they've been taken from the web site www.debevec.org