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Author Topic: Help  (Read 27154 times)
BackdropJunction
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« on: April 07, 2011, 09:44:25 PM »

Hi guys I'm using the free download for a test drive and I have asked this elsewhere so please forgive the repetition but I need to be able to do this for my business.

Okay.

I need to print 17" tall x at least 216" long (18 ft.)

I use a Nikon D90 process with CS5 on a MAC

I save these images as TIFFS pr PSD if necessary

I cannot see the images in QImage

I am printing on an Epson 4880

How do I make this work?

Thanks
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Fred A
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« Reply #1 on: April 07, 2011, 10:16:24 PM »

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I cannot see the images in QImage

Mac Tiff saves are different from a PC Tiff

See screen snap.

As for the PSD, Qimage has no trouble reading thiose as long as they were properly saved.
Is the file size too large for your resources? What is the filesize?
Do you get an Image Read Error in the thumbnails?

Fred
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BackdropJunction
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« Reply #2 on: April 08, 2011, 02:19:12 AM »

yeah I got an image read error.  Mike replied to an email suggesting the file sizes are too big maybe.  He asked for some info so I'll know more when he gets back to me.

Now, obviously people do print images this large for certain applications.  So if my files are too large as is then what would be the best way to go about doing this?  How small can I make the file before I start noticing a degraded resolution?  I currently save the files at 500 dpi.  I am guessing they could be a bit smaller without losing image quality and I think this would reduce overall size right?
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Fred A
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« Reply #3 on: April 08, 2011, 09:06:56 AM »

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I currently save the files at 500 dpi.  I am guessing they could be a bit smaller without losing image quality and I think this would reduce overall size right?

You didn't reply to my question of file size, so I can only guess.
Just a quick calculation suggests that 1.134 gigabytes would be close.
You might not have the resources to run a file that big.

As long as you are in touch with Mike, he will have the answer for you.
Good luck,
Fred
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Terry-M
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« Reply #4 on: April 08, 2011, 10:34:57 AM »

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Just a quick calculation suggests that 1.134 gigabytes would be close.
You might not have the resources to run a file that big.
There is a check on your resources by using Help, click Analyse Current Settings with the Shift key down. I get 2000MB on a modern W7-64 PC with 6GB ram.
Just to comment on
Quote
How small can I make the file before I start noticing a degraded resolution?  I currently save the files at 500 dpi.
QU will make excellent prints with a print resolution way below 500ppi. QU interpolates to the native resolution of the printer and for an Epson the maximum value is 720ppi. However, for very large prints, half the value (finest detail not ticked in the driver) of 360ppi is often used. This still means the image can be less than this as QU has superior interpolation methods to any other program.
Terry
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Fred A
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« Reply #5 on: April 08, 2011, 10:40:37 AM »

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(finest detail not ticked in the driver) of 360ppi is often used. This still means the image can be less than this as QU has superior interpolation methods to any other program

...and in addition. I think I remember correctly, Qimage will re interpolate your image back down to 360 ppi from your 500 ppi  to meet the native driver.


Fred
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BackdropJunction
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« Reply #6 on: April 08, 2011, 12:05:20 PM »

well thats good to hear. At least I can take a smaller version of the originale put it through the program and uszize it there without losing quality.  The image size is 2.75GB whihc leads me to believe I am doing something wrong in the first place cuz that seems excessive.

Actual pixels its 10800 x 8500

I show a 1789 MB as the Now available.
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Fred A
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« Reply #7 on: April 08, 2011, 12:13:46 PM »

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put it through the program and uszize it there without losing quality

Based on the principle that the more times you interpolate, the more quality loss, it begs the question, why resize at all.?
Why not take your image before you messed with it, the original, and open it in Qimage, tell Qimage what size print on what size paper, and PRINT.
Qimage will interpolate for the printer using Qimage's (best on the planet) interpolator. And you are done!

Fred
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Terry-M
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« Reply #8 on: April 08, 2011, 12:51:13 PM »

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Actual pixels its 10800 x 8500
Is this a stitch job; how did you arrive at this size and if it is a stitched image, can you start with smaller images? Or: - the narrower dimension of 8500  pixels is larger than a camera produces I think, so did you interpolate up to that size in CS5?
As Fred has said, multiple interpolation is a no-no for best quality, let QU do its magic.  Wink

Terry
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BrianPrice
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« Reply #9 on: April 08, 2011, 02:07:44 PM »

Hi

As Terry and Fred have said, Don't re-size your image. Nikon native resolution is 240dpi, which will be fine. It will be safer to use the QImage poster feature for printing (see 6a in 'Help by Example'). This is a fantastic way to print panoramas as it avoids problems with spool files, memory etc, and really works. Basically, all you do is set the page size to anything reasonable - say 24" - QI will split the image across the pages and the Epson will stitch them perfectly.

Brian
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BackdropJunction
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« Reply #10 on: April 08, 2011, 02:47:54 PM »

Okay sounds like I need to do a bit of relearning.  What I am doing is making photo backdrops for model railroads.  Due to the importance of scale I have to work with the image a lot to get the buildings and other things to appear the right size.  I then make a 17" crop out of the result for printing.

It sounds like what I could do is take the original image in photoshop, size it for what I need, write that size down, then take the small original, put it into QI and tell the program the ultimate dimension needed.  Have I got that right?

Thanks folks
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Fred A
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« Reply #11 on: April 08, 2011, 02:56:09 PM »

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t sounds like what I could do is take the original image in photoshop, size it for what I need,
I would take that original image and put it in Qimage. Tell the driver what size paper. Let Qimage have all the pixels to it can have, and let Qimage set the print size and ppi for you.
Assuming a roll with a 216" print, I would set user defined page size to 18" x 217"
Then in Qimage tell Qimage the print size; 17" x 216", and click Print

Brian's method is equally as effective and easy to do. You need to be in banner mode in the print driver besides roll paper.
Fred
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Terry-M
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« Reply #12 on: April 08, 2011, 04:03:10 PM »

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what I could do is take the original image in photoshop, size it for what
You don't need to "size" anything in photoshop. Remember an image does not have a size in inches, only pixels; and a PS inch size is merely a tag.
In Qimage, it's easiest to work in real print sizes and the program looks after the pixels.  Cool
Just use your image as it is and in Qimage, set a custom size 18"x217" with the crop scissors on and place in the queue. You can then adjust the crop in the Page Editor.
If you are not sure how to do that, come back to us.

Note for Brian, great to see you back contributing on the forum again.  Wink

Terry.
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BackdropJunction
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« Reply #13 on: April 08, 2011, 05:13:41 PM »

I think I see what you're saying I will give it a shot.  I assume there is a ruler tool or something to check the print size of an object on my image?  Then I can crop my 17" x 216" out of the result using QI instead of CS5.

Thanks for the help I will let you know how it turns out
  Dave
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Fred A
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« Reply #14 on: April 08, 2011, 05:42:51 PM »

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I assume there is a ruler tool or something to check the print size of an object on my image?  Then I can crop my 17" x 216" out of the result using QI instead of CS5.

Just tell Qimage your print size. Qimage is absolutely accurate and will report the print size from the queue (tab) screen that it is sending to the print driver.
No need for rulers or measurements.
Just tell it the print size with crop scissors on, and you will get just that size.
As terry mentioned earlier, if you need to adjust the crop a little, you can do that in the Full Page Editor Cropping tab.
It works so easy.
Just drop the Photo Shop for a day. :-)   
Try this.
Fred
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