compare two hdr image

[jui wen Huang]

Hello,

I have two problems when use HDR-VDP2 system.

I try to compare two totally different hdr image in HDR-VDP2,

the visualize P_map takes all red pixels but the Q_MOS value still takes 38 point ,

is it correct?

And the second problem is that 

I use a released HDR image form internet which is build form a series different exposure time images,

and use LDR2HDR system to build my own HDR image.

The two images look different after use tone mapping operator.

But the visualize P_map has many blue pixels where the pixels I can see different after tone mapping.

is it means  probability of detection if I use a HDR display to see the two images?

Here is my code:

  reference=hdrimread('memorial.hdr');

  test=hdrimread('memorial_Rempel.hdr');

  res=hdrvdp(img1,img,'rgb-bt.709',30)

  imshow( hdrvdp_visualize( res.P_map, test ) )

Thanks.