RSS News FeedCroping with an aspect ratio
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Subject:
Croping with an aspect ratio?
Date:Fri, 16 Oct 2009 05:36:19 +0100
How do I crop an image with aspect ratio? For example I want to crop my subject to a 5" x 7" frame. Any ideas? __________ Information from ESET NOD32 Antivirus, version of virus signature database 4512 (20091015) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com
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Subject:
Re: Croping with an aspect ratio?
Date:Fri, 16 Oct 2009 09:23:32 +0100
"HP Garcia" wrote: > How do I crop an image with aspect ratio? For example I want to crop my > subject to a 5" x 7" frame. Start a selection with the cropping tool and from the tool options check "Fixed" and select "Aspect Ratio" if not already selected from the list. Enter "5:7" (without the quotes) in the box below and then you can resize the selection all you want, keeping the correct ratio. You can also quickly switch between portrait (5:7) and landscape (7:5) with the icons next to the ratio.
Message-ID:<4ad847b1$0$4039$5402220f@news.sunrise.ch>
Subject:
Re: Croping with an aspect ratio?
Date:Fri, 16 Oct 2009 11:15:13 +0100
Le Fri, 16 Oct 2009 09:04:16 +0000, rich a écrit : > On Thu, 15 Oct 2009 21:36:19 -0700, HP Garcia wrote: > >> How do I crop an image with aspect ratio? For example I want to crop my >> subject to a 5" x 7" frame. > You can not crop to a particular size in inches. Wrong. At least with gimp 2.6.6 it is possible to crop to a particular size in inches, mm, px, % ... . See crop; tool-options; size LG
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Subject:
Re: Croping with an aspect ratio?
Date:Fri, 16 Oct 2009 12:10:54 +0100
On Fri, 16 Oct 2009 10:15:13 +0000, Laurianne Gardeux wrote: > Le Fri, 16 Oct 2009 09:04:16 +0000, rich a écrit : > >> On Thu, 15 Oct 2009 21:36:19 -0700, HP Garcia wrote: >> >>> How do I crop an image with aspect ratio? For example I want to crop >>> my subject to a 5" x 7" frame. > >> You can not crop to a particular size in inches. > > Wrong. At least with gimp 2.6.6 it is possible to crop to a particular > size in inches, mm, px, % ... . > > See crop; tool-options; size > crop in inches - That is true for any particular dpi but......... see: http://creativephotobook.co.uk/pg08005.html a couple of screenshots on imagesize and dpi http://www.imageno.com/nblt8qshdd5tpic.html -- rich
Message-ID:<87aazrbh6x.fld@apaflo.com>
Subject:
Re: Croping with an aspect ratio?
Date:Fri, 16 Oct 2009 14:29:26 +0100
rich <rich@nohome.com> wrote: >On Fri, 16 Oct 2009 10:15:13 +0000, Laurianne Gardeux wrote: > >> Le Fri, 16 Oct 2009 09:04:16 +0000, rich a écrit : >> >>> On Thu, 15 Oct 2009 21:36:19 -0700, HP Garcia wrote: >>> >>>> How do I crop an image with aspect ratio? For example I want to crop >>>> my subject to a 5" x 7" frame. >> >>> You can not crop to a particular size in inches. >> >> Wrong. At least with gimp 2.6.6 it is possible to crop to a particular >> size in inches, mm, px, % ... . >> >> See crop; tool-options; size >> >crop in inches - That is true for any particular dpi but......... >see: >http://creativephotobook.co.uk/pg08005.html > >a couple of screenshots on imagesize and dpi >http://www.imageno.com/nblt8qshdd5tpic.html Still, if you want a quality print you do have to pick a reasonable pixel per inch value, and crop to a resolution determined by that PPI value and the desired print size. That is done in GIMP, and is what he's referring to above. Then of course, with whatever choice is made for actually printing, the printer has to be told how big it should be. -- Floyd L. Davidson <http://www.apaflo.com/floyd_davidson> Ukpeagvik (Barrow, Alaska) floyd@apaflo.com
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Subject:
Re: Croping with an aspect ratio?
Date:Fri, 16 Oct 2009 15:15:53 +0100
On Fri, 16 Oct 2009 05:29:26 -0800, Floyd L. Davidson wrote: > rich <rich@nohome.com> wrote: >>On Fri, 16 Oct 2009 10:15:13 +0000, Laurianne Gardeux wrote: >> >>> Le Fri, 16 Oct 2009 09:04:16 +0000, rich a écrit : >>> >>>> On Thu, 15 Oct 2009 21:36:19 -0700, HP Garcia wrote: >>>> >>>>> How do I crop an image with aspect ratio? For example I want to crop >>>>> my subject to a 5" x 7" frame. >>> >>>> You can not crop to a particular size in inches. >>> >>> Wrong. At least with gimp 2.6.6 it is possible to crop to a >>> particular size in inches, mm, px, % ... . >>> >>> See crop; tool-options; size >>> >>crop in inches - That is true for any particular dpi but......... see: >>http://creativephotobook.co.uk/pg08005.html >> >>a couple of screenshots on imagesize and dpi >>http://www.imageno.com/nblt8qshdd5tpic.html > > Still, if you want a quality print you do have to pick a reasonable > pixel per inch value, and crop to a resolution determined by that PPI > value and the desired print size. > > That is done in GIMP, and is what he's referring to above. > > Then of course, with whatever choice is made for actually printing, the > printer has to be told how big it should be. Certainly: As I read the original post the magic word was 'frame'. As I read it OP wants an image that will fit in a 5" x 7" frame at 300 dpi you need an image 1500 pixels x 2100 pixels but you might get away with 1000 x 1400 (200 dpi) If the image is bigger than either of the above then crop with a setting of 5:7 in the crop dialog, make it as big as you wish and then print it, or if it is the correct ratio leave it alone. Then the problem is how to print 5" x 7" in gimp (windows) AFAIK the windows print plugin only prints to width of paper. Maybe the OP has a photo tray on his printer that takes 5" x "7 paper and will succeed. Otherwise there is the gutenprint plugin or use another application. The screen shots were from Photofiltre http://photofiltre.free.fr/frames_en.htm and another possibility is <http://download.cnet.com/Free-Image-Editor/3000-2192_4-10623587.html> which allows a custom size for printing. or Irfanview / Xnview - but not a very good algorithm. -- rich
Message-ID:<slrnhdi04u.6c7.nospam-abuse@chorin.math.berkeley.edu>
Subject:
Re: Croping with an aspect ratio?
Date:Sat, 17 Oct 2009 00:24:14 +0100
On 2009-10-16, rich <rich@nohome.com> wrote: > crop in inches - That is true for any particular dpi but......... > see: > http://creativephotobook.co.uk/pg08005.html Some advice there is very doubtful. above 300 No noticeable gain in quality over 300 PPI See Roger Clark's site (http://clarkvision.com/imagedetail/printer-ppi/). [IMO, SOME things Roger writes in his papers are not very much thought out too; but it looks like this particular test does not require a lot of deduction...] Ilya
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Subject:
Re: Croping with an aspect ratio?
Date:Sun, 18 Oct 2009 08:57:13 +0100
On Sat, 17 Oct 2009 19:15:09 +0000, Ilya Zakharevich wrote: > On 2009-10-17, rich <rich@nohome.com> wrote: >> As with anything its all a matter of perception. > > Sure. Roger has it (quite often). Most others do not. > >> I also think that your reference is a little dubious. > > A good illustration to the sentiment above. :-( > >><quote> >> . The test image above is based on a 4x5 image, originally scanned at >> about 3200 ppi, producing a 16585 x 13065 pixel image (216 megapixels!) >><unquote> >> >> when it comes to scanning see this >> http://www.scantips.com/basics08.html >> >> I find this as well, recently scanned an old colour print, printed on >> satin-finish paper (all the rage in the 80's) and high resolution scans >> were in fact worse or no better than scans at 300 dpi. > > If you do not know what "4x5" is. look it up. And read the rest of > Roger stuff; I'm pretty sure that given your confusions, those of Roger > would appear negligible... > > Hope this helps, > Ilya Indeed I do even without looking it up, it will have been a slide taken with a Hasselblad or similar (confess, I had to look up the spelling). Really appropriate to run-of-the-mill digital images, although I did once make a panorama where gimp reported/complained that the size, while editing was c.300 Mp. Had to go into preferences and up the settings. -- rich
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Subject:
Re: Croping with an aspect ratio?
Date:Wed, 21 Oct 2009 08:54:44 +0100
On Tue, 20 Oct 2009 23:33:50 +0000, Ilya Zakharevich wrote: > On 2009-10-18, rich <rich@nohome.com> wrote: >>> If you do not know what "4x5" is. look it up. And read the rest of >>> Roger stuff; I'm pretty sure that given your confusions, those of >>> Roger would appear negligible... > >> Indeed I do even without looking it up, it will have been a slide taken >> with a Hasselblad or similar (confess, I had to look up the spelling). > > I see that you still do not... Look it up. > > Ilya ok you win - I will believe what I believe and you believe what you believe. As for looking up do a Hasselblad +4x5 please -- rich
Message-ID:<slrnhdtm4f.34k.nospam-abuse@chorin.math.berkeley.edu>
Subject:
Re: Croping with an aspect ratio?
Date:Wed, 21 Oct 2009 10:46:55 +0100
On 2009-10-21, rich <rich@nohome.com> wrote: > As for looking up do a Hasselblad +4x5 please It would really help to get a clue. (Film) Hasselblad is 6x6, which is a very low-level format - comparing to 4x5. The difference is about 260%... (Approximately the same as difference between (film) Hasselblad and 35mm: 317%.) Yours, Ilya
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Subject:
Re: Croping with an aspect ratio?
Date:Wed, 21 Oct 2009 00:32:29 +0100
On 2009-10-17, rich <rich@nohome.com> wrote: > Looking at Roger Clarks blowup of the gopher? to me looks like some sort > of sharpening was applied. IIRC, this shot won some prestigious US competition of landscape photographers (among many others wins of Roger). Myself, I know that Roger's "looks like oversharpening" is going to be much more substantiated than mine; so I would abstain from critiquing Roger's photos on this regard. > In fact with my scanning software, it will apply both sharpening and > grain reduction to the scanned image. Given that you do not know what 4x5 is, this comment is excusable. (There is NO grain and no pixel-sharpening relevant to scans of this format; e.g., IIRC *this* shot was made at f/45.) > Back to the original post, If the image was taken with a 7 or 8 Mp camera > which are common these days it will be about 3000 x 4200 anyway, which is > 600 dpi ( sorry I'm old fashioned can't bring myseft to ppi) so cropping > the majority of the image at a ratio of 5:7 should produce a print > suitable for framing. ppi is the LAST criterion to apply for "suitability for framing". Yours, Ilya