Hello,

I'm working on a poster and have circle object I've slightly blurred for a shadow effect. I notice when I export to PNG as a small 9x6" image the object exports however when I expand the project to it's full size 36x24" the circle object I've blurred does not export to the PNG. I've tried grouping differently I've tried deleting all other objects and just exporting the blurred circle object and still it won't export to PNG. Any ideas?

Thank you,
Ed

Hi Ed,
Hhm, I've just done a couple of tests, and can't reproduce the problem (0.48.4 on Win7, 64-bit). I just used a blurred circle on top of a plain rectangle though. Maybe it's some other content in the file, that's causing the problem?

When you say it doesn't export, does that mean it doesn't show up in the PNG? Or it shows up but it's not blurred?

You're using File menu > Export Bitmap, right?? Because if you use Save As Cairo png, it won't work.

Thank you for the reply.

Using XP 32, Inkscape 0.48.2 r9819. I had a circle with a circle below with blur for shadow effect, I'm exporting using File Menu>Export Bitmap and all other object which there are about 20 including text export except for the blurred circle object is completely missing. I have ungrouped everthing then grouped all I've tried deleting all other objects and just having only the one blurred circle and still doesn't export. Just as reminder I have no problems when I reduce the size project from 24x36 inches to just 4" x 6" so size or memory must have something to do with it?

Ed

Hhmmm....maybe need to look at the settings in Export Bitmap dialog. If you use Page option, but part or all of the circle extends past the page border, it won't export. Instead, try using Drawing option. Or Select All and use Selection option.

Does that help?

Thank you. Same results using either method, selection, drawing, page, etc. I've also tried two different computers and receive the same results.


Ed

I experimented and this is what I've found. If I export to PNG a 24"x36" selection at 300 the blur object is exported, however if I increase it to 600DPI the blur object is missing. Also if I reduce the size of the image to 4"x6" with 600 DPI I the blue object is exported.

Oh, I didn't know you were changing the DPI. My experiments were all with the default 90 dpi. I'll try changing dpi....

Ok, well it took 10 minutes to export a 24" x 36" circle at 300 dpi. But it was successful, circle, blur and all!

Maybe if you could share the SVG file, we could try to export with the same file you're having trouble with. Maybe we could find the problem?

brynn wrote:Oh, I didn't know you were changing the DPI. My experiments were all with the default 90 dpi. I'll try changing dpi....

Ok, well it took 10 minutes to export a 24" x 36" circle at 300 dpi. But it was successful, circle, blur and all!

Maybe if you could share the SVG file, we could try to export with the same file you're having trouble with. Maybe we could find the problem?

Sure here is the SVG file
https://dl.dropbox.com/u/2485159/Sample.svg

Here is the PNG at 600DPI (notice no image) however if you go 300 DPI the image exports to PNG.
https://dl.dropbox.com/u/2485159/600%20DPI%20Sample.png

My best,
Ed

You are trying to export a 311 megapixel bitmap that would require at least 1.2 GB (36X 600 X 24 X 600 X 4 bytes per pixel / 1000,000,000 bytes per gigabyte) of memory just to display...? That's not counting Inkscape's memory usage for the conversion.
A little research gives me this hard limit for Illustrator's PNG export:

....This equates to a 27.3" x 27.3" raster image at 300 DPI.

While Inkscape is not Illustrator the upper limits for Illustrator are probably upper limits everywhere.

And also this:

A 32-bits-per-pixel, 10000 by 10000 pixel image will require at least 400 million bytes of RAM to represent uncompressed in memory. Typically this image buffer would need to allocated in a contiguous block which could be difficult. Such an image will need to exist before it can be coded and compressed into PNG form.

Not sure about their math, though.

I tried to create a 21600 X 14400 image in GIMP and was informed that this would require 3.2 GB of memory....

Are you sure this high a resolution is necessary? Does your computer have the memory?

The sample file I posted is only one object in the file I'm working on there are 15 objects inclining a white background with a shaded objct on top all objects export at 600 dpi except the blur object. The exported png will open in infranview easily just to verify it was exported correctly.

Hi.

The SVG file exported OK (circle, blur and all) on a system with 16Gb RAM - although it took a while.

from druban's post

1000,000,000 bytes per gigabyte

druban, some nitpicking, you are calculating just as camera manufacturers are calculating megapixels - using a factor of 1000 instead of 1024 (2^10).
You are technically correct using the factor of 1000,000,000 bytes per Gigabyte - but computers are using Gigibyte's (1024^3)
(As I recall from some of your earlier posts I know you are fully aware of this - just could not resist. - Might be useful for some others to get the figures right?)
See the wiki page; http://en.wikipedia.org/wiki/Gigabyte

The error is small but adds up through the conversion to Kilo, Mega, Giga etc. as shown in the table below.

Pixel Width_________Pixel Height______Bit Depth______File Size
21,600_______x_____14,400_______x___32__________=__9,953,280,000_bits

Bits_______________Bytes______________Kilobytes______Megabytes________Gigabytes_____Terabytes
9,953,280,000__=___ 1,244,160,000__=___1,215,000__=__ 1,186.5______=_____1.159____=____0.001132

I tried to create a 21600 X 14400 image in GIMP and was informed that this would require 3.2 GB of memory....

Gimp Memory requirement is the size of the uncompressed image times two as GIMP keeps an "extra" image in memory for undo operations.

RGDS
Ragnar

Yeah, it took 10 min to export the 36" x 24" circle at 300 dpi, with 4 gb RAM. I'm not even gonna try 600 dpi!

Absolutely correct Ragnar... i just use these numbers when working without a calculator but of course it's not precise.

ragstian wrote:Gimp Memory requirement is the size of the uncompressed image times two as GIMP keeps an "extra" image in memory for undo operations.

The requirement is a good estimate especially for filtered objects, because Inkscape has to render the filtered object as a bitmap and hold it in memory while writing and compressing another bitmap. Probably this is true for all vector exports too... It might be much more memory efficient to allow either the option to export a PNG without any compression or to save in an uncompressed format like BMP. (The GIMP PNG export allows this option BTW and I have found it to be very fast to remove the compression from PNG exports.)

ragstian wrote:The SVG file exported OK (circle, blur and all) on a system with 16Gb RAM

My computer can't even count that high!

LOL when did this turn into a Gimp thread! : ) Anyone know why it won't export out of Inkscape at 600 DPI? : )) I need a fix... so I can get this done.

Hi ewood

edwood wrote:

LOL when did this turn into a Gimp thread! : ) Anyone know why it won't export out of Inkscape at 600 DPI? : )) I need a fix... so I can get this done.

My earlier post;

The SVG file exported OK (circle, blur and all) on a system with 16Gb RAM - although it took a while.

According to earlier posts your solution is either:
1 - Add more RAM to your machine.
2 - Lower the DPI (and hence the RAM requirement)

Good Luck
Regards
Ragnar

ragstian wrote:Hi ewood

edwood wrote:

LOL when did this turn into a Gimp thread! : ) Anyone know why it won't export out of Inkscape at 600 DPI? : )) I need a fix... so I can get this done.

My earlier post;

The SVG file exported OK (circle, blur and all) on a system with 16Gb RAM - although it took a while.

According to earlier posts your solution is either:
1 - Add more RAM to your machine.
2 - Lower the DPI (and hence the RAM requirement)

Good Luck
Regards
Ragnar

wooops! Thank you! : )

I wanted to report back to some things I've done since posting this if anyone else is searching for a similar solution. These seem to be the simplest but not the most effective as far as exact color matching but it's doable.

Method 1: I export from Inkscape to the standard PNG at 300 DPI I then import into GIMP then export from GIMP to PDF.

Method 2: I just found this one and I really like it as it keeps the file in vector and the size of the files are way smaller. In Inkscape I save-as PDF the trick to this is what is exported is the page so if you're like me and generally ingore the page outline on the Inkscape work space you can't do that anymore this all the sudden is your most valuable set up item. For example I just did a big 2 x 10 foot banner so I went to File>Document Properties>Page and set the background to the nontransparent white then did custom size and for this project changed the units to feet I'd normally use inches for print stuff. Then when you finish your project click save as and select PDF and you'll be surprised how well this comes out and how small the file is to email.

Hope this helps someone

: )

Ed