The class IlluminateImage provides a tool for re-illuminating any reflectance image with a white image acquired under a specific illumination.
Description: This class was developed to generate images under
multiple illuminations from a reflectance image. The class was
originally designed for operating on hyperspectral images and predicting
hyperspectral appearance of scenes under fluorescent light (indoor
ceiling light), Oriel Xenon lamp (flat power spectrum in the visible
spectral range), and incandescent light (regular desktop lamp). The
dialog for image re-illumination is shown below.
First,
the calibrated reflectance image, the black image (e.g., acquired with
lens cap on) and the illumination images are selected using the file
choosers invoked by clicking on the button "...". The images can be
previewed using the adjacent buttons labeled as "View". The
re-illumination formula is the reverse formula of the calibration
equation (see Image Calibration tool). After clicking the button
"Illuminate", the following formula is applied:
re-illuminated pix[i, j] = calibrated pix[i,j]*( illumination pix[i,j] - black pix[i,j]) + black pix[i,j]
