Poster size question.
Discussion
Ok I have taken the following picture:
and the driver would like a poster doing.
The original image size is an 8.3MPixel RAW file from my 20D (3504 x 2336 pixels)
A 100% crop of the image is shown below:
The guy would like the biggest poster possible out of this, what size do you think I could take it up to without massive image degredation? I was thinking A2 size . Will this look ok? (I don't want to order it all and find out it looks rubbish!)
and the driver would like a poster doing.
The original image size is an 8.3MPixel RAW file from my 20D (3504 x 2336 pixels)
A 100% crop of the image is shown below:
The guy would like the biggest poster possible out of this, what size do you think I could take it up to without massive image degredation? I was thinking A2 size . Will this look ok? (I don't want to order it all and find out it looks rubbish!)
pixaco said:
4. What minimum resolution should my pictures have?
For acceptable quality, the image-size should not be less than the following recommendations:
Format recommended minimumimage-size in pixels
5x3.5 640x428 (640x480)
6x4 800x533 (800x600)
7x5 1024x682 (1024x768)
12x8 1280x853 (1280x1024)
18x12 1600x1067 (1600x1200)
24x16 2560x1707 (2560x1920)
30x20 3000x2000 (3000x2250)
The following image-sizes are recommended for high quality printout results:
Format recommended size in pixels
5x3.5 1024x682 (1024x768)
6x4 1280x853 (1280x1024)
7x5 1600x1067 (1600x1200)
12x8 2048x1365 (2048x1536)
18x12 3000x2000 (3000x2225)
24x16 4000x2667 (4000x3000)
30x20 5000x3333 (5000x3750)
Not sure if that answers what your'e after.
Phil S said:I've heard that NoiseNinja is well regarded too...
I tried NeatImage and it made a right mess of it 
Thanks for the help guys, i'll get my head round the information this afternoon and order the print. (It's far to early to do anything that important!)
Well, I am stunned!
I emailed the file to Pixaco (seemingly the cheapest place to get the poster printed) asking for their opinion of print size, expecting nothing short of a barrage of abuse in return for sending them a 4 megabyte JPEG file. Instead I got a lengthy answer specifically written for my file and question, and they had even tested it against their software for suitability, advising me to correct the aspect ratio and possibly add some borders (as suggested above). The reply even came under 30 minutes after asking the question!
As for the noise reduction, it had escaped my brain that it was a RAW file I was dealing with so I just used the NR and Luminence smoothing in that - worked a treat.
I emailed the file to Pixaco (seemingly the cheapest place to get the poster printed) asking for their opinion of print size, expecting nothing short of a barrage of abuse in return for sending them a 4 megabyte JPEG file. Instead I got a lengthy answer specifically written for my file and question, and they had even tested it against their software for suitability, advising me to correct the aspect ratio and possibly add some borders (as suggested above). The reply even came under 30 minutes after asking the question!
As for the noise reduction, it had escaped my brain that it was a RAW file I was dealing with so I just used the NR and Luminence smoothing in that - worked a treat.
Pixaco rocks, as I've often said.
Also check out http://graphicssoft.about.com/od/increaseresolution/ for articles on how to increase the resolution.
Using some of these tricks I've pushed many an image "up one size" to a level that no-one, not even on squinting at it, can notice.
The key thing is that most printers don't use one of the "clever" ways of streching an image to fill the poster size. This means that at worse you get "blocks" in the printed image.
By using something like bicubic upsampling, the software "fills in the missing bits" and when you print it those "smoothed out" bits are printed.
As a rule, try not to go below 200dpi of what you send to the printer to get excellent results, no less than 125dpi for good results.
To illustrate the effect, here are three images.
1) The original image from my Canon
2) Now, if you printed that, say, at A1, i.e. 7 times larger than normal, the printer would just upscale it and if you looked close you would see this
See the blocks - that's what normal resizing does.
3) But, if you increased the resolution (in this case I've scaled up 7 times) using bicubic sampling you get this
Now - step back from your monitor and you'll see that after you get about 4 feet away the last image looks "fine" but you can still see the "blocks" on the second image.
Hope that makes sense!
J
Also check out http://graphicssoft.about.com/od/increaseresolution/ for articles on how to increase the resolution.
Using some of these tricks I've pushed many an image "up one size" to a level that no-one, not even on squinting at it, can notice.
The key thing is that most printers don't use one of the "clever" ways of streching an image to fill the poster size. This means that at worse you get "blocks" in the printed image.
By using something like bicubic upsampling, the software "fills in the missing bits" and when you print it those "smoothed out" bits are printed.
As a rule, try not to go below 200dpi of what you send to the printer to get excellent results, no less than 125dpi for good results.
To illustrate the effect, here are three images.
1) The original image from my Canon
2) Now, if you printed that, say, at A1, i.e. 7 times larger than normal, the printer would just upscale it and if you looked close you would see this
See the blocks - that's what normal resizing does.
3) But, if you increased the resolution (in this case I've scaled up 7 times) using bicubic sampling you get this
Now - step back from your monitor and you'll see that after you get about 4 feet away the last image looks "fine" but you can still see the "blocks" on the second image.
Hope that makes sense!
J
Check out those big ad posters
And check out the rasterpoints . . . It's not made for you to look at it with ur nose on it . . . Once made a 6 metre long banner from a 124 mb tiff. Looked great:
www.codered.nl/html/images/sunblade_1_800600.jpg
And check out the rasterpoints . . . It's not made for you to look at it with ur nose on it . . . Once made a 6 metre long banner from a 124 mb tiff. Looked great:
www.codered.nl/html/images/sunblade_1_800600.jpg
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