HDR, Photosphere and Photoshop V9

One of my student found that she can make HDR Radiance images in Photoshop V9. She did not yet check the accuracy of those:

In Photoshop you can Automate --> Merge HDR Photo

            Then you select the photos and before it merges them it asks for exposure speed and f-stop values.

            You then press Okay and it will compile them.

            Then you have to check the White placement level and press Okay

            When its finished doing all that you go to "save as" a Radiance file

This will give you an HDR format which needs to been processed by Radiance to get a Falsecolor map and luminance ratios.

Martin Moeck, Penn State

Photoshop does indeed offer this capability. Unfortunately, it doesn't do any absolute calibration on the images, and the camera response it derives is terribly inaccurate. You are much better off with HDRshop from <www.debevec.org>. The one advantage is that Photoshop will align the images if you're starting from hand-held exposures. It doesn't work quite as well or nearly as quickly as Photosphere or hdrgen, but at least it's available for Windows.

-Greg

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From: "Martin Moeck" <[email protected]>
Date: November 15, 2005 2:46:27 PM PST

One of my student found that she can make HDR Radiance images in Photoshop V9. She did not yet check the accuracy of those:

In Photoshop you can Automate --> Merge HDR Photo

            Then you select the photos and before it merges them it asks for exposure speed and f-stop values.

            You then press Okay and it will compile them.

            Then you have to check the White placement level and press Okay

            When its finished doing all that you go to "save as" a Radiance file

This will give you an HDR format which needs to been processed by Radiance to get a Falsecolor map and luminance ratios.

Martin Moeck, Penn State