[LRFlex] Re: [Leica] Leica DMR vs. Canon 20D comparison shots
- From: "Kohyanga LeBarbu" <kohyanga@xxxxxxx>
- To: <leicareflex@xxxxxxxxxxxxx>
- Date: Sat, 4 Jun 2005 20:13:28 +0200
Cher Douglas:
Formidable!
Kohyanga
----- Original Message -----
From: "Douglas Sharp" <douglas.sharp@xxxxxx>
To: <leicareflex@xxxxxxxxxxxxx>
Sent: Saturday, June 04, 2005 2:19 PM
Subject: [LRFlex] Re: [Leica] Leica DMR vs. Canon 20D comparison shots
> I've run the comparison TIFFs of DMR and 20D through "Find Edges" and
> "Invert" for the iris shot.
> I think that this comparison shows the edge effects and general
> contrast and sharpness better than the predominant yellow of the
> original.The edges show clearly the differences in sharpness and
> fringing effects. IMO the Canon edges are a lot purer than the DMR
> which seems to show a rainbow effect around the edges, possibly a
> microlens effect coming from the sensor.
>
> Please note : these are quite large files it may take a while loading
them.
>
>
http://gallery.leica-users.org/New-Old-Pictures/D20_1_Iris_f16_Edge_detect_invert
>
>
http://gallery.leica-users.org/New-Old-Pictures/DMR_1_Iris_f16_Edge_detect_invert
>
> It's a pity they can't be absolutely identical in size and exactly
> aligned, it would be reasonably easy to subtract one image from the
> other to show the remaining differences.
>
> Changing the original images from RGB to HSL (Hue Saturation Luminance)
> shows marked differences too, although I don't have the knowledge to
> evaluate the results.
>
> cheers
> Douglas
>
>
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