How to tell existing image size

sectionq

Full Member

Posts: 109

Re: How to tell existing image size

« Reply #15 on: December 31, 2012, 04:22:46 PM »

Quote from: Fred A on December 31, 2012, 03:42:24 PM

Sure it will.
Just go to Custom and select original size, check Override, and type in 300.
When you go back to teh main screen, Qimage will show you the image size at 300 ppi.

Thanks Fred, not that useful which is probably what caused the confusion but now I know. haha

cheers


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uncletim

Newbie

Posts: 5

Re: How to tell existing image size

« Reply #16 on: December 31, 2012, 04:40:50 PM »

Okay, let me explain my work flow.

Two days ago I was looking at a 3 shot pano of Lower Calf Creek, each frame 36 megapixels.

I was wondering how big this image was natively. To me that means how many inches is this image at 300 pixels per inch. I try to print at 300 ppi. That image is 7031 x 11087. Now I know that if I just divide 731 / 300 I will get 23.47 inches. But I do not want to do that for every image. I want that information displayed. I want to work in inches not just pixels. I also know that I do not have to worry about printing at or close to 300 ppi and I can just let the program do it.

So I opened the image in Photoshop and went into the image size command and saw immediately the size in inches at 300 ppi is 23.47 x 36.957. Then I said "Ah ha. I'll just print it at 24 x 36 and it will work fine." But I needed the image size in inches information to do that. So I always have to go to Photoshop to get it. I thought there would be some way to see the size in both pixels and inches at 300 ppi without going out to Photoshop.

That is all I want. And I do intend to keep working that way. Not by looking at an image and starting by thinking about how big I want to print it. This is how I work. This is actually a very simple question. Can the program show file size in inches at 300 ppi (or some density) and pixels? I do not see that it currently does this.

And thank you guys for trying to help me. Happy New Year!

Tim G.


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Fred A

Forum Superhero

Posts: 5644

Re: How to tell existing image size

« Reply #17 on: December 31, 2012, 05:07:49 PM »

Quote

Two days ago I was looking at a 3 shot pano of Lower Calf Creek, each frame 36 megapixels.

I was wondering how big this image was natively. To me that means how many inches is this image at 300 pixels per inch. I try to print at 300 ppi. That image is 7031 x 11087. Now I know that if I just divide 731 / 300 I will get 23.47 inches. But I do not want to do that for every image. I want that information displayed. I want to work in inches not just pixels. I also know that I do not have to worry about printing at or close to 300 ppi and I can just let the program do it.

OK Tim....
Would have saved a lot of time, although I have nothing else to do anyway, if you would have said the above. Grin

Ok Now look at this scenario!

I have a stitched image of 3 shots making a pano... OK so Far?
That's your set up.
I have my image of 7031 x 11087......
Now all I do is Click Custom Print, select Original size, check the override box and type in 300 ppi.
Click OK
Now the image appears in the main screen at 300 ppi and the size you mentioned comes with it.

See snap

The lower part shows the 300 PPI and the print size shows at 24 x 14

Same thing

Happy new year and glad we got it all together.

Fred


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uncletim

Newbie

Posts: 5

Re: How to tell existing image size

« Reply #18 on: December 31, 2012, 08:07:49 PM »

Thank you Fred.


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Oldfox

Newbie

Posts: 38

Re: How to tell existing image size

« Reply #19 on: December 31, 2012, 08:15:58 PM »

Quote

if you would have said the above.

He wrote that in his second post (#4):

Quote from: uncletim on December 30, 2012, 05:04:26 PM

So I want to know what the file size is in inches at 300 dpi.

So pixels with inches and resolution is what I want to see at a glance.

That's the standard way in Photoshop (as long you remember to tick off 'Resample Image').
I dont see nothing wrong in this. If you always use 300ppi, you will get quickly the feeling how long/wide the print will be. The final print size is a different thing, as he wrote.

/fox


« Last Edit: December 31, 2012, 10:16:37 PM by Oldfox »	Logged

Sandy

Jr. Member

Posts: 61

Re: How to tell existing image size

« Reply #20 on: December 31, 2012, 08:57:50 PM »

Quote from: uncletim on December 31, 2012, 04:40:50 PM

I fancy you are putting more restrictions on yourself than necessary. Re-sizing methods are very good and accommodate far beyond a few % changes (eg from 23" to 24"). Almost all of us decide what size of print we want and unless the interpolation needed is huge, we just go ahead. Others can suggest better than I what interpolation factors still produce decent results. Note that a 40"x60" picture is going to be viewed from a little distance away so there will be forgiveness on extensive interpolation - or a lower dpi.

All this means you need no more than a ballpark figure (and a very big ballpark at that) to determine what size (in inches) you can print. If you really want to stick with 300dpi as guiding your print size you will be sufficiently accurate with mental arithmetic eg 7031/300 = a bit over 20 and 11087/300 = just under 40. That's miles more accurate than you need to be. As others have said, 300dpi is a bit of a fiction anyway.

Qimage reads what your particular printer prefers as its dpi and exploits that eg 240dpi, 720dpi etc. So, you are highly unlikely to be printing at 300dpi anyway.

Sandy


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