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Pictures from the Past: Art and Symbols of the Neolithic and Bronze Age |
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| The Stone Circles of Britain, Ireland and Brittany, Aubrey Burl |
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Forum: General Forum
Moderated by : Andy B , TimPrevett , Klingon , sem , MickM , TheCaptain , bat400 , coldrum , davidmorgan , Runemage , SolarMegalith
Respond to: Photo Editing Software
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Klingon
Joined:
08-08-2004
Messages: 758
from Germany
 OFF-Line
|  New Message Posted!2006-05-22 09:39
Quote:
| On 2006-05-21 08:20, blingo wrote:
to keep image sharp increase 'dpi' when you size down. |
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That is only half the truth. DPI is only necessary for printing.- large DPI - small and sharp picture
- small DPI - large and blurred picture
An example: Printout size of a picture with 750x500 pixels (Megalithic Portals standard)- 300 DPI - 2.5"x1.67"
- 72 DPI - 10.42"x6.94"
Both prints have got the same amount of information (750x500) but the 300 DPI picture looks sharper (cos it's smaller).
No program showing pictures at a display interprets the DPI number (750x500 will be displayed as 750x500). But many programs confuse users with these declarations.
[ This message was edited by: Klingon on 2006-05-22 09:40 ]
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Anonymous
User not Registered |  New Message Posted!2006-05-21 14:00
Blingo - I don't think that DPI tip applies across the board - what paint package have you found that with?
Yes certainly sharpening should always be done to a minimum.
And keeping a high res low compression JPG will do if you don't have the space for TIFFs, as long as each image is around 1 or 2MB.
You never know when someone might see your image on the Portal and want to buy a high-res reproduction from you.
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blingo
Joined:
01-07-2002
Messages: 21
from chester
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| New Message Posted!2006-05-21 08:20
to keep image sharp increase 'dpi' when you size down.this increases memory so play about( and always keep an original saved image in 'tiff' format as no detail is lost)
using the sharpen filter can (not always) pixelate the image giving straight edges a uneven step kinda edge.
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Andy B
Joined:
13-02-2001
Messages: 7001
from Surrey, UK
OFF-Line
| New Message Posted!2006-05-20 23:54
I sometimes find that a final slight sharpen after the resize down to web size can help.
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TimPrevett
Joined:
02-10-2012
Messages: 1193
from Cheshire / Manchester
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| New Message Posted!2006-05-20 21:04
Sorted it... just played around. Images coming soon...
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TimPrevett
Joined:
02-10-2012
Messages: 1193
from Cheshire / Manchester
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| New Message Posted!2006-05-20 20:57
Also, each additional resize reduces clarity. A lovely sharp image becomes progressively blurred.
Tim
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TimPrevett
Joined:
02-10-2012
Messages: 1193
from Cheshire / Manchester
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| New Message Posted!2006-05-20 20:49
Still find Gimp leaves me with a 500 longest side pixel over 200kb... any hints?
Thanks. Tim.
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JimChampion
Joined:
30-12-2004
Messages: 398
from Southampton
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| New Message Posted!2006-05-18 18:10
Quote:
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On 2006-05-17 22:12, Andy B wrote:
Jim - you've just gone up even more in my estimations - what were you doing?
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If I've understood your question correctly - I was doing a PhD in theoretical physics at Birmingham University. For some reason my chops are still on the group's webpage: link even though I left in 2003. As is often the case in university research, we had a Sun network and a load of networked Linux machines.
I wrote my thesis using LaTex, plotted graphs with gnuplot and created figures using FORTRAN and xfig. Esoteric days! Had to learn the microsoft way during teacher training so that I could cope in schools.
Now I've gone well off-topic.
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Andy B
Joined:
13-02-2001
Messages: 7001
from Surrey, UK
OFF-Line
| New Message Posted!2006-05-17 22:12
Jim - you've just gone up even more in my estimations - what were you doing? I hope you get a chance to counter some of the huge dollops of Microsoft propganda that schools seem to be awash with today.
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JimChampion
Joined:
30-12-2004
Messages: 398
from Southampton
OFF-Line
| New Message Posted!2006-05-17 20:32
Glad you like it - I've also downloaded it and am using it. Its a bit "nerdy" but if you get the hang of it, its great (interface is improved on what it used to be). Has all the usual tools, plus a whole load more. I hope its stable.
All you have to do now is resist the temptation to render a "supernova starburst" onto all your pictures 
Jim
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