maximum image size

RE: maximum image size

Paul Chater — Thu, 15 May 2014 13:44:31 GMT

No, it wouldnt it needs to stitch the tiles together so would need memory for that. Same with save multiple in order for it to tonemap the image the entire buffer needs to be in memory.

Regards

Paul

RE: maximum image size

Ivo Blaauw — Thu, 15 May 2014 08:51:09 GMT

Would Distributed rendering be a way to bypass this problem?

RE: maximum image size

Paul Chater — Tue, 13 May 2014 08:18:09 GMT

Hi,

The issue is that to display the image in the luxology dialog for a 28800x28800 image requires 3gb of memory. Microstation is a 32bit application and cant allocate that much memory. The upcoming 64bit version of microstation will be able to display this.

Regards

Paul Chater

RE: maximum image size

april evans — Tue, 13 May 2014 03:44:58 GMT

So even the latest Luxology update can not still remove the limits on the image size and resolution in the process of image rendering, right? Wow, hope there is a better and faster way to render high-resolution image.

Re: maximum image size

Robert Jones — Tue, 23 Mar 2010 14:15:40 GMT

On a previous project and an older version of luxology we had the same issue of (then) too large renders crashing.

The workaround that got us through was to set up and save the view as required, rendering a small sample image to get the "adapt to brightness" correct and saving those settings. Dragging the border of the view port halfway (allowing for some overlap), rendering at full resolution then recalling the view and dragging the opposite border to halfway, and rendering. Finally using photoshop to stitch the two halves together.

The few images we did this way were very nearly pixle perfect at the overlap...

Hope this helps

Re: maximum image size

Ron Jones — Mon, 22 Mar 2010 22:10:29 GMT

FWIW:
Here's a link to an excellent explanation of DPI, PPI, image resolution and the confusion many people have about it.
The Myth of DPI

Also from the same site:
What Magazines / Printers Really Want
The Arithmetic of DPI
(You might want to send these links to your client.)

HTH,
Ron

Re: maximum image size

Matt Gooding — Mon, 22 Mar 2010 21:13:13 GMT

To clarify, there are still limits to the image sizes that can be rendered with MicroStation even with the Luxology Update. The update greatly reduces memory consumption for rendering images and brings MicroStation in line with other high-end rendering packages.

Thanks,
Matt

Re: maximum image size

Peter Tegza — Mon, 22 Mar 2010 19:48:52 GMT

Matthew,

I'd suggest to render as big image as your RAM allows you (guess you're on 64bit system) and then use Photoshop to enlarge the image - I had quite good results using Genuine FractalsPhotoShop plugin ... check their page >

http://www.ononesoftware.com/detail.php?prodLine_id=7

HTH

Re: maximum image size

mswede — Mon, 22 Mar 2010 19:48:31 GMT

i have a 64-bit machine and 12GB or ram [probably should have included that info in my original post, sorry ‘bout that]. that is why i am curious about the image size restraints in ustation as i am fairly sure i'm not ‘actually' running out of physical memory.

anyway, thanks for the reply and the option. i was thinking of doing that if i couldn't get this to work.

Re: maximum image size

Louis van Amerongen — Mon, 22 Mar 2010 19:39:41 GMT

Hi mswede,

I'm afraid that if you want to render very high resolution images you have to consider to buy more ram and probably a 64 bit version of Windows.

And even that can't ensure the rendering will succeed. A resolution of 28,800 (I presume horizontal) lines, is very extreem for a rendering.

Option 2 is to render you're image at for example 150 dpi and increase the size in Photoshop.

Regards

Re: maximum image size

mswede — Mon, 22 Mar 2010 17:29:35 GMT

thank you both for your replies. however, i am aware, and have informed the client, that 300 dpi is a bit 'over the top' but they were insistent. so, what the owner wants, the owner gets.

so, back to the original question. anyone?

Re: maximum image size

Eric Milberger — Mon, 22 Mar 2010 09:14:05 GMT

Most print houses use 72 dpi

Re: maximum image size

Ron Jones — Sat, 20 Mar 2010 05:32:31 GMT

I would question the value of creating a 300dpi image meant for a final output size of 8'x4'.

Large images like that are usually viewed from several feet away and a such seldom benefit from the added resolution. To the contrary, they take longer to render and print, and often cause problems when sending them to the printer/plotter.

We normally use a maximum of 150 dpi for posters. This allows us to create displays which maintain smooth, readable text and smooth line work. If the final image doesn't have any text or line work, where aliasing of the edges is most noticable, you could probably reduce the dpi to something like 100dpi or lower and still achieve acceptable results.

Just because a printer or plotter is capable of 300, 600, or even 1200 dpi output doesn't mean they require(/or benefit from) that resolution in the image being printed. The determining factor for resolution of the image your are rendering in MicroStation should be, "What is the lowest resolution that produces acceptable results at the desired viewing distance?" You can try a small 1'x1' section of the image rendered at various dpi (72, 100, 150, 300, etc...), and plot each out at 1'x1' and compare the results.

Use the lowest resolution that looks good.

HTH,
-Ron