Not responding when Convert Jpg(800Kb) to Tiff

[sireeshala]

At image.type(BilevelType) Not responding because of the recursion.
if i have changed the parameters resize or density or any thing else its working fine.

For the following image
https://www.dropbox.com/s/3g3baikbnvomd5k/rescale.jpg

Code: Select all

string sResultSinglePage( "rescale.jpg");
Geometry gNewDensity(300,300);
	Image image;
	image.read( sResultSinglePage.c_str() );
	image.resize("7968x10968");
        image.density(gNewDensity);
        image.quality(g_nJpegQuality);
        image.magick("TIFF");
        image.compressType(Group4Compression);
        image.type(BilevelType);
        image.write("rescale.tiff");

Thanks in advance

[dlemstra]

Can you please post your IM version and platform?

[sireeshala]

On windows 7 64 bit and Im Version is 6.8.7

[sireeshala]

if I tried to avoid the function (commented out) image.type function
image.write function is also not responding for 15 to 18 mins and given a complete black image.

is this a bug or is there any problem with the image properties?
Even i am able to reproduce this on 6.8.2

Thanks in advance,

[dlemstra]

The problem probably the amount of pixels in your image. At some point ImageMagick will use your disk to store its pixels and reading/writing that is really slow. Maybe you can switch your application to 64 bit? This will allow you to allocate more memory at once.

[sireeshala]

application has some dependencies so we cant switch it over 64 bit.
Mentioned that "probably the amount of pixels in image". are there any specified limits ?
Can we get some other solution to this problem?

[dlemstra]

You can increase the memory limit with Image::cacheThreshold(bytes). The documentation says megabytes but it really is bytes, I already patched this comment in the svn repository. You can read more about memory limits on windows here: http://msdn.microsoft.com/en-us/library/aa366778.aspx.

[sireeshala]

There is no use by setting this value is there any other alternative ?

[dlemstra]

There is no use by setting this value

Setting this value did not help?

[sireeshala]

i have tried to set with some values like 100000 .... it did nt worked out
Can you suggest any exact value which fixes this problem

[dlemstra]

I cannot suggest a value that fixes the problem. You could try the maximum value: 4294967295

[sireeshala]

Setting the memory limit to any value does nt worked out .
Still the convert.exe in not responding for longer time.

Is it possible to throw any error if its unbale to convert in a specified time limit.