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flmixsw-enfused-2
Multiple exposures using the "enfuse" algorithm.
Date: 11/23/2008
Views: 661
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flmixsw-flash-only
White light view of the rather bland looking minerals.
Date: 12/09/2005
Views: 587
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flmixsw-summed
This is the result of merely summing each of the bracketed exposures. The contributions of the clipped overexposures effictively result in a response curve similar to applying a gamma function (but in linear sections). This works very nicely for luminance
Date: 11/23/2008
Views: 495
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flmixsw-chroma
Proper color information can only be gathered from the linearized HDR data. This is the resulting chroma, reapplied to a simple log-luminance rendition of the scene.
Date: 11/23/2008
Views: 541
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flmixsw-linearized.exr
This is a linearized HDR (high dynamic range) image in OpenEXR format, ready for tone-mapping. It was generated from 15 bracketed exposures using my own low noise linearization algorithm. (Written in Java using the free ImageJ program.)
Date: 11/23/2008
Views: 540
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flmixsw-linearized-clipped
This is the scene as it might be photographed using auto-exposure witha linear response curve, allowing some overexposure and clipping.
Date: 11/23/2008
Views: 558
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flmixsw-linearized-unclipped
This rendition of the scene shows a simple linear response with no clipping. The colors are accurate, but the dynamic range is so great in the brightest parts of the image that everything else is too dim to see.
Date: 11/23/2008
Views: 463
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IMG_1992
This is the shortest exposure in the bracketed source image series, right from the camera. There are no overexposed pixels here.
Date: 12/09/2005
Views: 648
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IMG_1997
This is a source image from the middle of the bracket range. It might be typical if an auto-exposed photo of fluorescent minerals.
Date: 12/09/2005
Views: 481
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IMG_2004
This is the longest exposure of the bracketed source images. It is long enough to capture the depest shadow detail with minimum noise. Noise limits the dynamic range of a single camera exposure, and the HDR method overcomes this with fewer exposures and b
Date: 12/09/2005
Views: 631
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flmixsw-pmatix-noclip
This is the result of a typical HDR tone-mapping operation - this one from Photomatix. Some unnatural halos are evident in the thumbnail, but the end result shows good detail.
Date: 11/23/2008
Views: 437
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flmixsw-setup
This shows the arrangement of camera, light source (80watt UVC transilluminator), and an aluminum reflector to balance the UV light.
Date: 12/09/2005
Views: 696
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