HDR Test Targets

The test targets studying the spatial properties of neural contrast have small white and black square that are difficult to see on the printed page.


The following web pages have uncompressed .tif files for the reader to download.

F
igure 15.1 Magnified view of two of the twenty gray pairs of luminance patches.  The left half (A) has the same layout as the right (B) rotated 90° counterclockwise.  The gray squares have slightly different luminances: A(top & bottom); B (left &right). Each size of surround blocks has equal numbers of min and max squares.
Figure 15.2 Target with twenty gray pairs of luminance patches.  All gray pairs are close in luminance, but some edge ratios are larger than other.


[750 by 600 pixels]    15.2.tif


Figure 15.2 has a 50% White and 50% Black surround.

The target used in Figure 15.4 had a 8% White, 92% Black surround.

Insert shows a magnified view of a portion of the 8% White surround.

[2561 by 2049 pixels] file with entire image    White8.tif




Insert shows the 100% White Surround target.

[750 by 600 pixels]    White100.tif


Insert shows the 0% White Surround target.

[750 by 600 pixels]    White0.tif

 
 

Wiley Figures