Resizing pictures


autumnlight

Link Posted 23/10/2013 - 15:49
Hi, if i need to resize my pictures for printing or selling i haven't got a clue as to what the numbers mean, i've been told to resize to at least 3000 along the longest size but i don't know if this means pixels or something else, sorry for being so dim, i can resize in paint or resize online but haven't a clue whether to use pixels or percentage, please could i have a simple answer because i'm quite a simple person i've had a look through the forum but can't really find anything to help, thanks in advance
Kind regards Maria

https://www.facebook.com/pages/Maria-Gray-photography/589310071158079?ref=hl

wvbarnes

Link Posted 23/10/2013 - 16:07
Hi Maria,

I'm sure your camera images (K7?) will be fine up to A3 unless heavily cropped.

Good explanation here http://www.cambridgeincolour.com/tutorials/digital-camera-pixel.htm

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dangie

Link Posted 23/10/2013 - 16:14
Have a look at this. Hopefully it will explain all. It's for Photoshop but I don't think that matters. There is lots of free software to do it. Also if you go onto Google and search for Image Risize there will be plenty of videos I'm sure.

http://www.photoshopessentials.com/essentials/image-resizing/
6th Year Apprentice Pensioner

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Gamka

Link Posted 23/10/2013 - 16:34
When you resize there are several algorithms that can be used. I believe Photoshop has a choice of four. They will all be appropriate for a different requirement, for example enlarging, reducing. Choose the correct one.

That said, you can leave the number of pixels alone and just change the document size in inches/mm. That will retain te original sharpness.

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JAK

Link Posted 23/10/2013 - 16:36
Resizing is an absolute cinch in Irfanview.

http://www.irfanview.com/

- and it's free!

Lot simpler than resizing in Photoshop - just specify the length and it works out the width and will automatically sharpen the image if you wish (just tick the box!)

John K
John K
Last Edited by JAK on 23/10/2013 - 16:37

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autumnlight

Link Posted 23/10/2013 - 17:08
Thanks for your help everyone, that's a great help, i have irfanview John so i'll have a look, what i don't understand is the actual numbers as they are not given in c.m. inches etc, that's the part i don't understand
Kind regards Maria

https://www.facebook.com/pages/Maria-Gray-photography/589310071158079?ref=hl

autumnlight

Link Posted 23/10/2013 - 17:10
wvbarnes wrote:
Hi Maria,

I'm sure your camera images (K7?) will be fine up to A3 unless heavily cropped.

Good explanation here http://www.cambridgeincolour.com/tutorials/digital-camera-pixel.htm

Thanks John, it's a K5
Kind regards Maria

https://www.facebook.com/pages/Maria-Gray-photography/589310071158079?ref=hl

andrewk

Link Posted 23/10/2013 - 17:29
In Irfanview, you have the option of clicking on one of three radio buttons next to where it says "Units", which selects the measurement in use. Just click on the the left-most one for measurements in pixels.

Andrew
Flickr photostream

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JAK

Link Posted 23/10/2013 - 18:04
Resizing in Irfanview tutorial:

http://www.somewhere-in-time.net/tutorial/irfanview/

John K
John K

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johnriley

Link Posted 23/10/2013 - 18:22
The K-5 has a standard output that's approximately A3 in size at 300ppi - for many sales/printing purposes no resizing would need to be done at all. It exceeds the 3000 pixels asked for.
Best regards, John

autumnlight

Link Posted 23/10/2013 - 20:13
johnriley wrote:
The K-5 has a standard output that's approximately A3 in size at 300ppi - for many sales/printing purposes no resizing would need to be done at all. It exceeds the 3000 pixels asked for.

Thank you John that is most helpful and gives me more of an understanding about the ratio of ppi to pixels
Kind regards Maria

https://www.facebook.com/pages/Maria-Gray-photography/589310071158079?ref=hl

autumnlight

Link Posted 23/10/2013 - 20:24
Thanks everyone i'm more than happy with all your help
Kind regards Maria

https://www.facebook.com/pages/Maria-Gray-photography/589310071158079?ref=hl
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