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Old 23-02-2008, 20:55   #1 (permalink)
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Showing proportion of artwork on web

Hope I might get some help here, as I have had a mind-cramp re: this.
OK. Two paintings need to be displayed on the web on an artists website. One, is 28" x 24". SORRY! , about 71 x 61 cm, and the other painting is about 101 x 76 cm (40 x 30").

The images are at 72 dpi. At present, displayed on the web they look exactly the same size on screen, with no attention paid to their actual proportion to one another. So in looking at them both, they look the same size, until you see with the type lines that actually one is larger than the other. If these size designations were not there, you would think they were exactly the same size.

Is there a specific calculation in order to re-proportion the images without screwing them up? Do some kind of ratio work, or do you just "eye it"?

If I haven't made myself clear let me know and I will try harder (and take some analgesic to help it along...).

BTW - I may be able to post the example, but have to ask permission.

Best,
PBug
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Old 23-02-2008, 21:49   #2 (permalink)
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Re: Showing proportion of artwork on web

Well, to start with, you can probably ignore th '72 dpi' thing. Image files usually have a 'native resolution' in their data, which serves little purpose except to give a starting size if you insert them into another application.

All that really matters is the actual size of the image in pixels.

You need to resize the images so that their pixel dimensions are what is needed for the website. For instance, they may want them 800 pixels across - or whatever.

You can do this in any decent image editor by clicking on Image > Resize or something similar. If you have a choice of resizing methods, choose 'Bicubic'.

When you save this file as a JPG, you should be able to choose the compression and hence the quality. If there are restrictions on file size (in kB) you should choose the highest quality that comes within this limit. Typically, 95% gives good results.

If that's not what you meant and I'm talking gibberish, sorry!
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Old 24-02-2008, 16:45   #3 (permalink)
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Re: Showing proportion of artwork on web

Silk is right.

A suggestion, if I'm understanding that you want BOTH images on the same web page, is to simply use a pixel scale factor and the inch dimensions. For example, say you make the scale factor 10 pixels, then the first painting needs to be 400x300 pixels in size. Then the second needs to be 280x240 pixels. Then when both are shown on the same web page they will look in the right proportion to each other.

You will need to choose the pixel scale factor based on what the web page needs i.e. how big do you want the images to look. The key is to use the same scale factor for both, you can't use 15 pixels for one and then 10 for the other since the proportion will not be right.

Hope this helps.
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