Resolution
Apr 28, 2012 13:37:50 #
sjbegres
Loc: Pittsburgh, PA
Help. I want to get a 20x30 enlargement of a jpeg image I took with my Canon Rebel xti. Photoshop tells me the image is W: 3888 pixels x H: 2592 pixels.
What is the relationship between image size (3888x2592) and resolution?
Thanks for your help.
Sherrill
What is the relationship between image size (3888x2592) and resolution?
Thanks for your help.
Sherrill
Apr 28, 2012 13:51:46 #
16x24 might be about as far as you could push it. But 20x30 isn't out of the question if you don't need to get up close and personal with the print.
Apr 28, 2012 13:54:52 #
Apr 28, 2012 13:59:28 #
Apr 28, 2012 14:35:00 #
sjbegres
Loc: Pittsburgh, PA
MT Shooter wrote:
16x24 might be about as far as you could push it. But 20x30 isn't out of the question if you don't need to get up close and personal with the print.
The megapixel chart says "If you know how to use image editing software like Photoshop, you can "cheat" even more by increasing the image size, and even doubling the number of pixels in the image." Can I do that in this case? If so, how? I use PS Elements 7.
Thanks, again, for your help.
Sherrill
Apr 28, 2012 16:47:39 #
Yes, you can increase the image size, but the larger you go, the more the image degrades. It also depends on the sharpness of the original.
In PS go to Image : Image Size; I suspect PSE is the same.
In PS go to Image : Image Size; I suspect PSE is the same.
Apr 28, 2012 18:17:04 #
I remember at one time reading about a Photoshop plug-in that would extrapolate an image and increase the pixel count by 4. I don't remember the name but the examples actually looked pretty good
Apr 28, 2012 18:20:04 #
MT Shooter wrote:
I remember at one time reading about a Photoshop plug-in that would extrapolate an image and increase the pixel count by 4. I don't remember the name but the examples actually looked pretty good
I use Perfect Resize by OnOne, I think, but have heard in Photoshop if you increase the size in 10% steps it will help.
Apr 29, 2012 01:29:27 #
sjbegres wrote:
Help. I want to get a 20x30 enlargement of a jpeg image I took with my Canon Rebel xti. Photoshop tells me the image is W: 3888 pixels x H: 2592 pixels.
What is the relationship between image size (3888x2592) and resolution?
Thanks for your help.
Sherrill
What is the relationship between image size (3888x2592) and resolution?
Thanks for your help.
Sherrill
You camera is over 6 megapixels. I routinely make 24x36 inch images from 6 megapixel images. I use PhotoZoomPro to do the blow up. At minimum, you need about 150 dots per inch resolution to get a good enlargement. PhotoZoom Pro allows you to stipulate the print size and resolution. Then, you have a variety of choices to tweak overall quality. The image in the photo below is actually a scan of a 35mm slide.
One Variation of My Printing Room
Apr 29, 2012 06:10:03 #
GoofyNewfie wrote:
I use Perfect Resize by OnOne, I think, but have heard in Photoshop if you increase the size in 10% steps it will help.
MT Shooter wrote:
I remember at one time reading about a Photoshop plug-in that would extrapolate an image and increase the pixel count by 4. I don't remember the name but the examples actually looked pretty good
I use Perfect Resize by OnOne, I think, but have heard in Photoshop if you increase the size in 10% steps it will help.
Scout Kelby gave this trick. I have found that you can increase by 10 percent around 6 times before it starts degrading, but it has to happen in 10 percent increments!
Apr 29, 2012 06:54:22 #
Genuine Fractals can help you do this. It can be used as a stand alone or plug-in for PHotoshop.
http://www.ononesoftware.com/products/suite/perfect-resize/?ind
http://www.ononesoftware.com/products/suite/perfect-resize/?ind
Apr 29, 2012 09:53:32 #
You may not have to resize the file!
Check with your printer. He has to rip the files for printing and rips generally resize the files. For these modest resizings, I do not think how you resize them matters that much. Crop the original, unresized file with the final aspect ratio and send it to the printer. No screwing around with unnecessarily large files, maximum file quality.
As for resolution, the eye supposedly does not resolve more than 300 dpi. If you do resize your file, then a final resolution of 150 or 300 dpi should be fine. To view the print quality in PS, go to view>print size.
Find out if your printer uses rgb or cymk. If rgb, do not change the color mode; leave it alone, rgb. For cymk, use LZW compression. If you insist upon resizing, reduce the size to 25% or 50% at 300 or 150 dpi. I print up to 60 inches wide and more. It works when viewed at the proper distance. If you insist upon sticking your nose into the print, then nothing will make you happy.
Check with your printer. He has to rip the files for printing and rips generally resize the files. For these modest resizings, I do not think how you resize them matters that much. Crop the original, unresized file with the final aspect ratio and send it to the printer. No screwing around with unnecessarily large files, maximum file quality.
As for resolution, the eye supposedly does not resolve more than 300 dpi. If you do resize your file, then a final resolution of 150 or 300 dpi should be fine. To view the print quality in PS, go to view>print size.
Find out if your printer uses rgb or cymk. If rgb, do not change the color mode; leave it alone, rgb. For cymk, use LZW compression. If you insist upon resizing, reduce the size to 25% or 50% at 300 or 150 dpi. I print up to 60 inches wide and more. It works when viewed at the proper distance. If you insist upon sticking your nose into the print, then nothing will make you happy.
Apr 29, 2012 10:50:16 #
GoofyNewfie wrote:
I use Perfect Resize by OnOne, I think, but have heard in Photoshop if you increase the size in 10% steps it will help.
MT Shooter wrote:
I remember at one time reading about a Photoshop plug-in that would extrapolate an image and increase the pixel count by 4. I don't remember the name but the examples actually looked pretty good
I use Perfect Resize by OnOne, I think, but have heard in Photoshop if you increase the size in 10% steps it will help.
The 10% step increase is called Stair Interpolation, and it does help, noticeably. Don't know if it's as good as some of the specialized software programs, but it's noticeably better than increasing size in one step.
Some printers, such as LightJet, have built in resizing programs that, according to my printer, are superior to Stair Interpolation or Genuine Fractals. In those cases, just provide the low res file and let the printer resize the image.
Apr 29, 2012 10:58:36 #
ole sarg
Loc: south florida
If you are not going to do this yourself, find a shop that does this kind of enlarging and ask.
Apr 29, 2012 11:22:32 #
jackm1943 wrote:
Some printers, such as LightJet, have built in resizing programs that, according to my printer, are superior to Stair Interpolation or Genuine Fractals. In those cases, just provide the low res file and let the printer resize the image.
I am confused. With the cameras that most people have here, why shoot low resolution? To get more photos on a card or hdd? Memory is so cheap, why skimp? Sorry but I do not get it. Unless you view your photos only on a computer monitor or as 4x6 prints, I would should the largest file possible or at a size to match your output. You can always make a file smaller without sacrificing quality but you cannot go the other way.
Here is the dirty little secret. You usually do not need to resize your photos or buy a program to do so. Let the printer's rip do it.
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