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Posted 30 August 2010 - 03:12 AM
Posted 30 August 2010 - 12:36 PM
Q6600, 4GB g-skill, 8800GT, P5N-D motherboard
Posted 30 August 2010 - 07:05 PM
Posted 30 August 2010 - 07:34 PM
Edited by Platypus, 30 August 2010 - 07:38 PM.
Posted 30 August 2010 - 09:29 PM
Google is my friend. Make Google your friend too.
Posted 21 September 2010 - 03:48 PM
Posted 15 January 2017 - 03:22 PM
I've got the same problem. I have a 300Mb PNG that I'd like to scale down to a size that can be opened in a web browser. A huge loss of resolution is perfectly fine; especially compared to not being able to do anything with it. :-)
Posted 15 January 2017 - 04:03 PM
Posted 15 January 2017 - 07:34 PM
IrfanView can easily "resample" an image to any desired pixel count. I use it daily for that purpose. I shoot full-frame DSLR (Nikon D600) at the "fine" resolution setting of 6016 x 4016 pixels, at 24 bit color depth ("16 million colors"). The resulting JPEG files are about 12-13 MB in size, just too big to send as E-mail attachments (RAW files are much bigger, that's a whole 'nother story). I routinely downsize the JPEGs to say 1600 x 1068 pixels, resulting in a file size of around 320-350 KB. You can send quite a few of those attached to one e-mail message. The difference in quality is essentially not noticeable on a computer screen (unless you have a large photo-specialty monitor). Print production or publication is of course a different matter. I never send out full-resolution pictures (until paid for, that is <G>). Most E-mail servers seem to have a 10 MB limit for attachments to one message - so if you do need to share full-size image files, Dropbox works well. I've learned, moreover, that even the glossy magazines often don't want to deal with photo files bigger than a megabyte or so. A JPEG file 4512 x 3012 - that's 3/4 of the original linear dimensions - is only 1.16 MB in size, or about 1/10 of the original file size (the file sizes vary a bit depending on the distribution of colors in the image). Note this is not cropping but "resampling" of the entire original image at 3/4 scale. The magic of the compression algorithm is such that a 44% reduction in pixel count yields a 90% reduction in file size. My magazine editors love it <G>.
You can do the same thing with Photoshop, of course, with more bells and whistles, but IrfanView is so quick and easy (and amazingly capable) that I find myself using that most of the time.
Of course, never overwrite the original image file with a reduced-size copy. To avoid that I always create a separate subfolder for the copies, AND distinguish them by adding letters to the end of the file name. That way, even if I save them into the wrong folder by mistake, I don't overwrite anything.
Being a control freak, I avoid programs that re-size pictures automatically when you send them in E-mail. It takes only seconds to resize images in IrfanView, and then I know exactly what I did and what the recipient is going to see.
Posted 15 January 2017 - 08:23 PM
Thank you Martel. That is very kind. Here is a link to the image:
I still would like to know how to resize such a large image...
I tried the ImageMagick convert command line tool (convert --resize 10% I_Prefer_Pi,png), it filled over 90Gb of swap space and quit with the error message "convert: IDAT: Too much image data".
Saluqi; I will give IrfanView a try; I've used it once or twice; it's definitely worth a shot. Any program that tries to display the image on the screen I fear will fail though; I suspect that only a program purpose built to handle large images without using obscene amounts of swap and ram will have any luck with such a large image.
- Thank you.
Edited by fEsTiDiOuS, 15 January 2017 - 09:58 PM.
Posted 15 January 2017 - 08:50 PM
That link does not show an image.
Put it on one of your web pages or photo bucket or the likes.
In PaintdotNet you would choose resize and pick your size. (see example below).
IrfanView can easily "resample" an image to any desired pixel count. .
Edited by Martel, 15 January 2017 - 09:29 PM.
Posted 16 January 2017 - 01:51 AM
That link is to a three hundred megabyte PNG image. It's way too big to be opened by a web browser, it would just crash. - That is the problem the original poster and I are having. We have image files that are so large they can't be opened, we need to resize the image so that it can be used.
Posted 16 January 2017 - 05:45 AM
Is there any way that I can resize an image from 1GB to about 600KB
image files that are so large they can't be opened
Edited by Platypus, 16 January 2017 - 05:50 AM.
Posted 16 January 2017 - 07:36 AM
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