Evaluation set used in the paper "Comparison of single image HDR reconstruction methods 
	— the caveats of quality assessment":
	https://www.cl.cam.ac.uk/research/rainbow/projects/sihdr-benchmark/

	This is a web-based image gallery, for visual comparison of the images used for the subjective 
	evaluation experiment.

	All images have been displayed after a simple gamma correction. There is no other tone-mapping 
	applied.

	The main page ("index.html") shows the set of images, where each image can be explored by 
	clicking on it. Keywords can be used to select images with different content. The PU21-PSNR 
	numbers show the average scores over the selected set of images, and averaged over two different
	exposures (3% and 5% saturated pixels). PU21-PSNR has been computed after CRF correction, as 
	described in the above paper.

	The web pages for individual images show 6 different SI-HDR methods, as well as the input SDR
	image and the reference HDR image. By clicking on the different thumbnails, the different
	methods can be viewed. The PSNR and SSIM numbers show the similarity of the viewed image and the
	reference HDR image, after PU21 transform. The options on top of the web page are:

		-- Camera exposure: this is the exposure used for camera simulation of SDR images. This has
		   been set to saturate 3% or 5% of the pixels in the image.
		
		-- CRF correction: this is the correction described in the paper, which performs a non-linear
		   alignment with the reference HDR image, in order to allow for comparisons that are not
		   dominated by a method's ability to do CRF inversion.

		-- Display properties:
			* Display exposure: the exposure of the displayed image, which can be tuned to better
			  compare results in bright or dark parts of the images.

			* Show info: for displaying information about the viewed image, as well as a histogram.

			* Show scatter: for displaying a plot that compares the pixel values of a method with
			  the reference HDR image. This is useful to see how linear the pixel values are, i.e.
			  to see how well CRF inversion has been performed.

			* Magnifier: a magnifier "glass" that is displayed when moving the mouse pointer over
			  the image. By left clicking, the position of the magnifier can be locked.

			* Magnification: magnification level of the magnifier.

			* Size: the size of the magnifier.