[LRflex] Re: Difference Display - ImageSharpening/Chromatic Aberration
- From: Jerry Lehrer <jerryleh@xxxxxxxxxxx>
- To: leicareflex@xxxxxxxxxxxxx
- Date: Mon, 14 Nov 2005 08:40:30 -0800
Douglas,
I see it now. Thanks for the extra effort!
Jerry
Douglas Sharp wrote:
> Philippe and Jerry,
> so gentlemen, I've inverted the difference analysis images and converted
> them to monochrome, .
> both sharpening examples have had their contrast increased to +72 in PS
> for display.
> The chromatic aberration image is without sharpening or noise reduction.
> http://gallery.leica-users.org/New-Old-Pictures/PB130001b_U_mask
> Unsharp masking PS
> http://gallery.leica-users.org/New-Old-Pictures/PB130001b_DIFF_NI_edited_1
> Neat Image
> http://gallery.leica-users.org/New-Old-Pictures/PB130001b_DIFF_FMjpg_edited_1
> Focus Magic
> http://gallery.leica-users.org/New-Old-Pictures/PB130001b_chorm PTlens
> chromatic aberration correction
>
> I hope you can see them now. The images show exactly what is added to
> the original shot to "improve" it.
> BTW, it's a nice way to make sketches out of photos.
> cheers
> Douglas
>
> Philippe Amard wrote:
>
> >Pity you live so far across the ocean; I still have a Pentium 200
> >waiting to be switched on back to life in the corner of the room ...
> >Wish you good health anyhow.
> >Yours
> >Phileica
> >
> >PS I couldn't see the pict either if this can restore confidence in your
> >most respectable gear
> >
> >Jerry Lehrer wrote:
> >
> >
> >
> >>Douglas,
> >>
> >>No, I AM the ANTIQUE.
> >>
> >>While i would love to have a Pentium 5, Windows 2006, computer
> >>with a 21 inch flat screen; I can't do it on Social Security. My
> >>prescription bills alone would pay for the best computer in the world.
> >>
> >>Jerry
> >>
> >>Douglas Sharp wrote:
> >>
> >>
> >>
> >>
> >>
> >>>Jerry,
> >>>are you an antique dealer? ;-)
> >>>Nice to hear that you bought some really reliable stuff, pity you can't
> >>>see the fine detail on the "black" shots though, brightening them up
> >>>would have faked the results.
> >>>cheers
> >>>Douglas
> >>>
> >>>Jerry Lehrer wrote:
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>>Douglas,
> >>>>
> >>>>Great, I suppose. All looks IDENTICAL to me with my 10 year
> >>>>old computer, running Win 3.1 on a 486 with 16Mm of RAM. on
> >>>>a 12 inch screen. All black.
> >>>>
> >>>>jerry
> >>>>
> >>>>Douglas Sharp wrote:
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>Just as a matter of interest (to me at least) hopefully to some of you
> >>>>>ot there in LRFLEX land
> >>>>>Focus Magic sharpening, one of the best sharpeners around, sharpened
> >>>>>with setting 1 (minimum)
> >>>>>http://gallery.leica-users.org/New-Old-Pictures/PB130001b_DIFF_FMjpg
> >>>>>It's easy to see that FM sharpens the edges to get a sharpening effect.
> >>>>>
> >>>>>In comparison, Neat Image, combined noise reduction(all channels) and
> >>>>>sharpening in the luminance channel only.
> >>>>>http://gallery.leica-users.org/New-Old-Pictures/PB130001b_DIFF_NI
> >>>>>Sharpening is not limited to the edges with Neat Image, this explains
> >>>>>the extra "shine" on metallic surfaces.
> >>>>>My experience however, shows that both methods have their merits, it all
> >>>>>depends on the input data.
> >>>>>Douglas
> >>>>>
> >>>>>Douglas Sharp wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>>An additional image, the difference between original and processed.
> >>>>>>http://gallery.leica-users.org/New-Old-Pictures/PB130001b_difference
> >>>>>>This shows quite clearly where the processes worked, the blue lines are
> >>>>>>the chromatic abberation, the lighter parts, sharpening in the luminance
> >>>>>>channel.
> >>>>>>the lighter it is the greater the difference, black is where one image
> >>>>>>cancels out the other by destructive interference, an old trick from
> >>>>>>geophysical data processing
> >>>>>>for analysing and attenuating noise (invert and add).
> >>>>>>Douglas
> >>>>>>Douglas
> >>>>>>
> >>>>>>
> >>>>>>Douglas Sharp wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>By the way, if you download both in PS-Elements 3.0 (if you have it)
> >>>>>>>you
> >>>>>>>can compare the two shots on one split screen.
> >>>>>>>Douglas
> >>>>>>>
> >>>>>>>Douglas Sharp wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>Xavier,
> >>>>>>>>I must answer your question with a clear NO - however you can get
> >>>>>>>>damned
> >>>>>>>>close if you do a little post processing.
> >>>>>>>>I hope you don't mind, I've posted your image and my correction at:
> >>>>>>>>
> >>>>>>>>http://gallery.leica-users.org/New-Old-Pictures/PB130001b your
> >>>>>>>>original
> >>>>>>>>http://gallery.leica-users.org/New-Old-Pictures/PB130001b_edited_2
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>Nice old camera, some time ago you mentioned DxO as a processing
> >>>>>>>>option,
> >>>>>>>>the alternative is PTlens (freeware)
> >>>>>>>>I ran your image through PTlens to correct the chromatic aberration
> >>>>>>>>(the
> >>>>>>>>bright blue edges on the adjustment ring, particularly strong above
> >>>>>>>>the
> >>>>>>>>500 shutter speed) and subsequently ran the whole thing through Neat
> >>>>>>>>Image to reduce noise and sharpen in the luminance (y) channel (to
> >>>>>>>>avoid
> >>>>>>>>bright edging).
> >>>>>>>>The improvement of the image is very obvious, considerably reduced
> >>>>>>>>fringing and the meatl parts look more "metallic" after Neat Image,
> >>>>>>>>and
> >>>>>>>>the whole job only took about 3 minutes.
> >>>>>>>>If you would like to try it -
> >>>>>>>>1) download and install PTlens - in PS or PS Elements or whichever
> >>>>>>>>other
> >>>>>>>>Image Processing you use.
> >>>>>>>>2) Check chromatic aberration (click in the box, make sure fish-eye,
> >>>>>>>>vignetting and distortion are unchecked)
> >>>>>>>>BTW, If your camera lens combination is listed you can set the camera
> >>>>>>>>and focal length and use distortion correction too
> >>>>>>>>4) Zoom into a part of the image where fringing is obvious
> >>>>>>>>5) Set slider Blue-Yellow to between +0.0042 and + 0.0047 (I used
> >>>>>>>>+0.0044)
> >>>>>>>>Click OK and your image is already improved.
> >>>>>>>>For noise reduction and sharpening:
> >>>>>>>>Neat Image:
> >>>>>>>>You can download a free stand-alone version (not a plug-in) which
> >>>>>>>>works
> >>>>>>>>very well -in fact it works so well I decided to buy the Neat Image
> >>>>>>>>Pro
> >>>>>>>>version, which also runs as a plug-in.
> >>>>>>>>Now the problems start - there are so many sliders and options that
> >>>>>>>>you
> >>>>>>>>need to practice for a couple of weeks before you find out exactly
> >>>>>>>>what
> >>>>>>>>they do, and how they affect your image. The effects can be quite
> >>>>>>>>spectacular when you get the settings right!
> >>>>>>>>
> >>>>>>>>Bille Xavier F. wrote:
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>>Helle Gentlemen.
> >>>>>>>>>
> >>>>>>>>>I just bought a "old" digital camera, P&S olympus. In fact, I
> >>>>>>>>>believe it is
> >>>>>>>>>enough for my needs so far.
> >>>>>>>>>
> >>>>>>>>>Obviously it is not matching the Panasonic with a Leica 12x lens but
> >>>>>>>>>enough
> >>>>>>>>>to do most of the daily internet photos I need.
> >>>>>>>>>
> >>>>>>>>>Here is an example, using the right white balance on a cloudy day,
> >>>>>>>>>macro:
> >>>>>>>>>
> >>>>>>>>>http://xavierf.b.free.fr/Temp/PB130001b.jpg
> >>>>>>>>>
> >>>>>>>>>It is a "good enough" camera: subject is the Agfa Isolette II
> >>>>>>>>>shutter (do
> >>>>>>>>>you see the spots on the coating?)
> >>>>>>>>>
> >>>>>>>>>Sorry for being off topic here but I truly believe in the "Bridge"
> >>>>>>>>>type of
> >>>>>>>>>cameras rather than the Reflexes. So far, I've read in the local
> >>>>>>>>>magazines
> >>>>>>>>>ant i's been confirmed by the local photog that a lens can be a real
> >>>>>>>>>dog on
> >>>>>>>>>a digicam while on another it becomes good.
> >>>>>>>>>
> >>>>>>>>>All depends on the sensor and the post processing.
> >>>>>>>>>
> >>>>>>>>>So, I hope the DMR has enough software to use the Rom contact and
> >>>>>>>>>decide
> >>>>>>>>>which profile is best.
> >>>>>>>>>
> >>>>>>>>>Alas, the DMR is to heavy for my flat purse...
> >>>>>>>>>---------------------------------
> >>>>>>>>>Xavier F. BILLE
> >>>>>>>>>Maisons-Alfort - France.
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>------
> >>>>>>>>>Unsubscribe or change to/from Digest Mode at:
> >>>>>>>>>http://www3.telus.net/~telyt/lrflex.htm
> >>>>>>>>>Archives are at:
> >>>>>>>>>www.freelists.org/archives/leicareflex/
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>------
> >>>>>>>>Unsubscribe or change to/from Digest Mode at:
> >>>>>>>>http://www3.telus.net/~telyt/lrflex.htm
> >>>>>>>>Archives are at:
> >>>>>>>>www.freelists.org/archives/leicareflex/
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>------
> >>>>>>>Unsubscribe or change to/from Digest Mode at:
> >>>>>>>http://www3.telus.net/~telyt/lrflex.htm
> >>>>>>>Archives are at:
> >>>>>>>www.freelists.org/archives/leicareflex/
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>------
> >>>>>>Unsubscribe or change to/from Digest Mode at:
> >>>>>> http://www3.telus.net/~telyt/lrflex.htm
> >>>>>>Archives are at:
> >>>>>> www.freelists.org/archives/leicareflex/
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>------
> >>>>>Unsubscribe or change to/from Digest Mode at:
> >>>>> http://www3.telus.net/~telyt/lrflex.htm
> >>>>>Archives are at:
> >>>>> www.freelists.org/archives/leicareflex/
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>------
> >>>>Unsubscribe or change to/from Digest Mode at:
> >>>> http://www3.telus.net/~telyt/lrflex.htm
> >>>>Archives are at:
> >>>> www.freelists.org/archives/leicareflex/
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>------
> >>>Unsubscribe or change to/from Digest Mode at:
> >>> http://www3.telus.net/~telyt/lrflex.htm
> >>>Archives are at:
> >>> www.freelists.org/archives/leicareflex/
> >>>
> >>>
> >>>
> >>>
> >>------
> >>Unsubscribe or change to/from Digest Mode at:
> >> http://www3.telus.net/~telyt/lrflex.htm
> >>Archives are at:
> >> www.freelists.org/archives/leicareflex/
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >------
> >Unsubscribe or change to/from Digest Mode at:
> > http://www3.telus.net/~telyt/lrflex.htm
> >Archives are at:
> > www.freelists.org/archives/leicareflex/
> >
> >
> >
> >
> ------
> Unsubscribe or change to/from Digest Mode at:
> http://www3.telus.net/~telyt/lrflex.htm
> Archives are at:
> www.freelists.org/archives/leicareflex/
------
Unsubscribe or change to/from Digest Mode at:
http://www3.telus.net/~telyt/lrflex.htm
Archives are at:
www.freelists.org/archives/leicareflex/
Other related posts:
