Large JPEG's

[rolf-anders]

Hei, I am using the ijl 1.5 library to load a part of a big jpeg image. When I say big I mean realy big, the image is 61440x61440 pixels. This image is so big that the allocation in OpenCV will not allocate. The code I have now workes fine, but I would like to port it to linux. And my question is: Is there anything in the IPP or OpenCV library that can load a part of an image?

The CvvImage::LoadRect can not...

Or is there anyone that has any good ideas on how to do it?

[Vladimir_Dudnik]

Hello,

we provide an example how to implement IJL API on top of IPP, please take a look on IPP image-codecs samples. Although, this sample only provided for Windows, but it really should not be so difficult to port it to Linux because of cross-platform IPP nature.

Where, I mean what application area, such a huge images required? What are the other conditions in your application?

Regards,
Vladimir

[rolf-anders]

The images are scans from laser scanners of cells, and the complete image is often even bigger. They are often devided up into multiple jpeg's. We only need to get a small portion of the image at a time. That is done with IJL today, but we want to be able to run the calculations on a linux cluster, and therefore need to find something that can load a part of the jpeg image on linux.

Have seen the IJL-IPP sample for windows. Do you mean that that can be ported without to much work to linux?