<div dir="ltr"><div>Good afternoon ,</div><div>With the orfeo GRM segmentation module <a href="https://www.orfeo-toolbox.org/CookBook-8.1/Applications/app_GenericRegionMerging.html">https://www.orfeo-toolbox.org/CookBook-8.1/Applications/app_GenericRegionMerging.html</a></div><div>i obtain interesting results for small images/area , for instance for one input ortho image (3 bands) . Please see result below : </div><br><img src="cid:ii_m8328wpx0" alt="image.png" width="578" height="343"><br>i would like to get this kind of results this time for a bigger area  / big image. But with GRM, i get error memory message because this module does not support large image. Could you advise me/direct me towards an orfeo segmentation or another qgis tool / associated parameters & settings that would support large input images and that would allow me to obtain this type of segmentation results (hight size of  segments,segments that have a high heterogeneity acceptance threshold ).Maybe module as "LSMSSegmentation" or " LargeScaleMeanShift" would be appropriate/relevant ? <br><br><br><div> [1]: <a href="https://i.sstatic.net/iVoHECUj.jpg">https://i.sstatic.net/iVoHECUj.jpg</a></div><div><br></div><div>Thanks so much</div></div>