User MUST specifying the resolution x and y if using luminance file (.txt) (INPUT 3)ĥ.Set the input file directory If file in the same directory of 'main.m', put the file name on it (e.g.:'yourfilename.hdr', 'yourfilenname.txt').ħ.Specify the your fisheye projection type, “0”: equisolid angle projection "1": equidistant project.Ĩ.Input to the choice to print an illuminance map and make ROI selection, “0”: only output the illuminance of scene, If user want to resize image, specifying the resolution x and y, x and y must be equally scaled from original resolution. Visualized gradient map: For view only Can give some general idea about which part contribute more lux.Ģ.Specify the sensor size of camera (INPUT 1)ģ.Specify the focal length of fisheye lens (INPUT 2).Ĥ.If input file is hdr image, user can skip this step (using original resolution). If you select the ROI, the output will tell you lux contributed from selection and its percentage. ROI(region of interest): if you want to know how much lux camera received from which object in the scene.
lux-perpixel: illuminance value calculated by using per-pixel method. lux-uniform: illuminance of image taken in very uniform lighting environment. Evaluate uniformity of lighting environment of your input. You CAN scale if input is image (.hdr) you MUST specify the resolution if input is luminance map(.txt). HDR image must be taken by fisheye lens with supported projection above to calculate illuminance Fisheye projection selection: equisolid/equidistant (will support more projection in later update). HDR image (.hdr) or luminance map output from Radiance (.txt). Sample output of ROI#2, 192 lx, 30.3% of total illuminance Sample output of ROI#1, 167 lx, 26.4% of total illuminance Sample output of illuminance gradient map, 631 lx Greg Ward, Radiance File Formats, Radiace reference, Lawrence Berkerly Lab, 2011. Guide to Product Specification.International Organization for Standardization. General Purpose Photographic Exposure Meters(Photoelectric Type),
This program has been tested on a computer with Intel i5 2.9GHZ and 8GB RAM. MATLAB release 2018b, 2019a are recommended Add-on 'Imgage Processing Toolbox' required.
#Speedgoat kernel transfer matlab 2018b windows 7
System Requriement: Windows 7 or above, MacOS 10.10 or above.
#Speedgoat kernel transfer matlab 2018b how to
To learn how to take a 'Good' HDR image for lighting measurement purpose and use it as the input of this program,
IlluminanceCalculation Retrieve illuminance from Radiance HDR image with region of interest (ROI) lux selection