Resizing to very large image

b60q3flhba29

Newbie

Posts: 11

« on: June 28, 2014, 05:56:26 AM »

Hello everyone (and Mike)
I'm finally getting back to QImage after a three year hiatus, I have to say I find Ultimate a definite progress.

I agree that the resize algorithms, I think they are much superior than the other famous competitor.

However, I have a question: I am expanding a picture to 60x40, because I need to send it to a service.

Ultimate does the job, but if I select a resolution that is for example 360 dpi terminates with an out of memory error.
At 360dpi the image size would be around 0.9 GByte, so it shouldn't even be a problem of 32 vs 64 bit data structures.

The error above happens if I save in jpg (quality 95)
If I try to save TIFF, I receive a message that not enough disk space is available, even if I have 1.3 TB free on that disk.

Interestingly enough, even if the I got the error, the jpg file was saved and I can open it in GIMP with no issues

Am I doing something wrong?

Thank you
Marco Brambilla


« Last Edit: June 28, 2014, 06:00:01 AM by b60q3flhba29 »	Logged

Fred A

Forum Superhero

Posts: 5644

Re: Resizing to very large image

« Reply #1 on: June 28, 2014, 09:31:00 AM »

Quote

However, I have a question: I am expanding a picture to 60x40, because I need to send it to a service.

Ultimate does the job, but if I select a resolution that is for example 360 dpi terminates with an out of memory error.
At 360dpi the image size would be around 0.9 GByte, so it shouldn't even be a problem of 32 vs 64 bit data structures.

The error above happens if I save in jpg (quality 95)
If I try to save TIFF, I receive a message that not enough disk space is available, even if I have 1.3 TB free on that disk.

Interestingly enough, even if the I got the error, the jpg file was saved and I can open it in GIMP with no issues

Am I doing something wrong?

Hi Marco.
I just made 2 TIFs as you described, 60 x 40 at 360 ppi.
Not a problem in the world. 933.2 Megabytes, same as yours

So we need some particulars.
First of all, Your Operating system?
XP. W7, W8?

Then, let's check available memory for Qimage use.
Click HELP. Hold down the SHIFT key. Click Analyze/
What numbers do you get?

What steps do you take from putting the image into the queue, and clicking Print.?
Trying to emulate to recreate.

Fred


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b60q3flhba29

Newbie

Posts: 11

Re: Resizing to very large image

« Reply #2 on: June 28, 2014, 09:47:29 AM »

Thank you Fred for your reply.
You are right, I missed some important information, sorry!

I have win7x64, with 12 GB of Ram.

I am selecting a jpg image, source resolution 3447x2998

In the Print to File I select 60x40, 360 dpi, sharpen 5.
I browsed into the folder, so am adding the image directly from the QImage GUI, clicking the "+" sign.
I then select fit to page in the menu in the lower-right corner of the image in the queue.

In the Print to File window I select JPG, quality 95 and select a directory on the C Drive.

The one item that might be worth mentioning is that the drive I'm using is encrypted by TrueCrypt

The result of Help|Analyze is:
Start: 2147 MB
Addl: 1265 MB
Now: 838 MB

Windows Resource Monitor claims I have 4.4GB of Ram in standby and 2504 free, for a total available of 6981 MB

Thank you again
Marco


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Fred A

Forum Superhero

Posts: 5644

Re: Resizing to very large image

« Reply #3 on: June 28, 2014, 09:55:07 AM »

OK, Now one more.
Close Qimage and open it, and make the same Analyze test
Fred


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b60q3flhba29

Newbie

Posts: 11

Re: Resizing to very large image

« Reply #4 on: June 28, 2014, 05:29:30 PM »

Freshly opened:
Start: 2147 MB
Addl: 1265 MB
Now: 2146MB

Thanks again
Marco


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Fred A

Forum Superhero

Posts: 5644

Re: Resizing to very large image

« Reply #5 on: June 28, 2014, 08:29:30 PM »

I get the same numbers, so no problem there.
Just tried the JPG and I get the same result that you get.
Tifs are fine. If you need a JPG either reduce the ppi to 300, or reduce the JPG quality from 95 to 94. That seems to work here.

Fred


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b60q3flhba29

Newbie

Posts: 11

Re: Resizing to very large image

« Reply #6 on: June 29, 2014, 06:35:17 AM »

Hello again Fred

Having bought the registered version, I can now confirm that v2014.240 solves the issue. I have been able to print directly to TIFF

By the way, I think in another message you were wondering why 360, which is a resolution quite high, especially when resizing an image by 500%
The reason is that I have analyzed a few services (I wish I had a 44" printer at home...) and the RIP or driver they use does not do a very good interpolation, so I want to send them something as good as I can get it with QImage.

Thank you for the support.

Marco Brambilla


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