# Latest **URL:** https://forum.orfeo-toolbox.org/latest.md [Latest](https://forum.orfeo-toolbox.org/latest.md) · [Categories](https://forum.orfeo-toolbox.org/categories.md) --- ## [Welcome to Discourse](https://forum.orfeo-toolbox.org/t/welcome-to-discourse/7)
**Author:** [@system](https://forum.orfeo-toolbox.org/u/system)\ **Replies:** 1\ **Last updated:** [December 19, 2018, 9:03am UTC](https://forum.orfeo-toolbox.org/t/welcome-to-discourse/7 "2018-12-19T09:03:14Z")
Welcome to OTB forum, our discussion site for any subject related to Orfeo Toolbox (OTB). You’ll find topics on features, bugs, hosting, development, and general support here. --- ## [Cdash.orfeo-toolbox.org shutdown for a limited time due to PHP vulnerability](https://forum.orfeo-toolbox.org/t/cdash-orfeo-toolbox-org-shutdown-for-a-limited-time-due-to-php-vulnerability/3453)
**Author:** [@tristanlaurent](https://forum.orfeo-toolbox.org/u/tristanlaurent)\ **Replies:** 1\ **Last updated:** [October 22, 2026, 2:09pm UTC](https://forum.orfeo-toolbox.org/t/cdash-orfeo-toolbox-org-shutdown-for-a-limited-time-due-to-php-vulnerability/3453 "2026-10-22T14:09:24Z")
Hi, We are putting www.orfeo-toolbox.org and cdash.orfeo-toolbox.org down for a limited time these two services use PHP. Critical Vulnerabilities have been discovered and the correction from PHP team is expected during … --- ## [Incomplete gamma area map](https://forum.orfeo-toolbox.org/t/incomplete-gamma-area-map/3449)
**Author:** [@remi.cresson](https://forum.orfeo-toolbox.org/u/remi.cresson)\ **Replies:** 0\ **Last updated:** [September 23, 2026, 11:50am UTC](https://forum.orfeo-toolbox.org/t/incomplete-gamma-area-map/3449 "2026-09-23T11:50:47Z")
Hi, Another thread on gamma area maps generation. This time I encountered a very weird case where the gamma area map has not been fully generated over the MGRS tile. Here are the key info to reproduce the issue: MGR… --- ## [Artifacts in gamma area maps images?](https://forum.orfeo-toolbox.org/t/artifacts-in-gamma-area-maps-images/3447)
**Author:** [@remi.cresson](https://forum.orfeo-toolbox.org/u/remi.cresson)\ **Replies:** 0\ **Last updated:** [September 21, 2026, 8:08am UTC](https://forum.orfeo-toolbox.org/t/artifacts-in-gamma-area-maps-images/3447 "2026-09-21T08:08:22Z")
Hi, I am playing with S1Tiling to generate gamma-rtc calibrated images. I noticed some kind of “lines” artifacts in the output images, particularly in mountain area. These artifacts seem to come the gamma area map itsel… --- ## [Release 10.0.0-rc1](https://forum.orfeo-toolbox.org/t/release-10-0-0-rc1/3446)
**Author:** [@tristanlaurent](https://forum.orfeo-toolbox.org/u/tristanlaurent)\ **Replies:** 0\ **Last updated:** [September 18, 2026, 5:18pm UTC](https://forum.orfeo-toolbox.org/t/release-10-0-0-rc1/3446 "2026-09-18T17:18:22Z")
Dear OTB community, We are happy to announce that OTB version 10.0.0-rc1 has been released! Ready to use binary packages are available on the package page of the website: OTB-10.0.0-rc1-Linux.tar.gz (Linux Ubuntu) … --- ## [Maintenance of the Gitlab](https://forum.orfeo-toolbox.org/t/maintenance-of-the-gitlab/3438)
**Author:** [@tristanlaurent](https://forum.orfeo-toolbox.org/u/tristanlaurent)\ **Replies:** 0\ **Last updated:** [June 24, 2026, 8:56am UTC](https://forum.orfeo-toolbox.org/t/maintenance-of-the-gitlab/3438 "2026-06-24T08:56:11Z")
Hi community, we are investigating about the gitlab slowness today. The platform will be unavailable today but it is for the best. Sorry for the inconvenience. Best regards OTB Team --- ## [Three technical issues on OTB servers](https://forum.orfeo-toolbox.org/t/three-technical-issues-on-otb-servers/3425)
**Author:** [@sdinot](https://forum.orfeo-toolbox.org/u/sdinot)\ **Replies:** 1\ **Last updated:** [February 25, 2026, 2:25pm UTC](https://forum.orfeo-toolbox.org/t/three-technical-issues-on-otb-servers/3425 "2026-02-25T14:25:55Z")
Dear all, We encountered three technical issues on the OTB collaborative development platform. Issue #1: On Monday morning, the VM hosting the OTB forum and website suddenly became inaccessible via the network (and it… --- ## [Release of S1Tiling 1.3.0](https://forum.orfeo-toolbox.org/t/release-of-s1tiling-1-3-0/3423)
**Author:** [@luc.hermitte](https://forum.orfeo-toolbox.org/u/luc.hermitte)\ **Replies:** 0\ **Last updated:** [February 12, 2026, 4:26pm UTC](https://forum.orfeo-toolbox.org/t/release-of-s1tiling-1-3-0/3423 "2026-02-12T16:26:17Z")
CNES and CS Group FRANCE are glad to announce the release of S1Tiling 1.3. Version 1.3 integrates the following main improvements: performance optimizations, improvement of a few diagnosed errors, project depen… --- ## [Manually merging labeled segments](https://forum.orfeo-toolbox.org/t/manually-merging-labeled-segments/3420)
**Author:** [@bvanhuizen](https://forum.orfeo-toolbox.org/u/bvanhuizen)\ **Replies:** 0\ **Last updated:** [January 30, 2026, 3:27pm UTC](https://forum.orfeo-toolbox.org/t/manually-merging-labeled-segments/3420 "2026-01-30T15:27:00Z")
Context \*Hi there, I am trying to generate a segmented image to be used in a landuse classification random forest model. I am running this on a high performance cluster, however I am limited to 8 hour session time limit… --- ## [Fourth release candidate of S1Tiling 1.3](https://forum.orfeo-toolbox.org/t/fourth-release-candidate-of-s1tiling-1-3/3417)
**Author:** [@luc.hermitte](https://forum.orfeo-toolbox.org/u/luc.hermitte)\ **Replies:** 0\ **Last updated:** [January 13, 2026, 3:02pm UTC](https://forum.orfeo-toolbox.org/t/fourth-release-candidate-of-s1tiling-1-3/3417 "2026-01-13T15:02:08Z")
CNES and CS Group FRANCE are glad to announce the 4th release candidate of S1Tiling 1.3. Version 1.3 integrates the following main improvements: performance optimizations, improvement of a few diagnosed errors, … --- ## [The otb log level can't be changed after importing otbApplication in Python code](https://forum.orfeo-toolbox.org/t/the-otb-log-level-cant-be-changed-after-importing-otbapplication-in-python-code/3403)
**Author:** [@mlucas](https://forum.orfeo-toolbox.org/u/mlucas)\ **Replies:** 3\ **Last updated:** [December 19, 2025, 2:37pm UTC](https://forum.orfeo-toolbox.org/t/the-otb-log-level-cant-be-changed-after-importing-otbapplication-in-python-code/3403 "2025-12-19T14:37:05Z")
Context I am trying to change the otb log level (not the pyotb log level) after importing otbApplication. Configuration setup My system: Redhat 8 Version of the OTB: 9.1.0 I installed the OTB with: I am using the otb … --- ## [Edit / change ortho aerial radiometric values with conditions ( shadows mask / low values of a digital height model)?](https://forum.orfeo-toolbox.org/t/edit-change-ortho-aerial-radiometric-values-with-conditions-shadows-mask-low-values-of-a-digital-height-model/3409)
**Author:** [@image80](https://forum.orfeo-toolbox.org/u/image80)\ **Replies:** 0\ **Last updated:** [December 17, 2025, 10:33am UTC](https://forum.orfeo-toolbox.org/t/edit-change-ortho-aerial-radiometric-values-with-conditions-shadows-mask-low-values-of-a-digital-height-model/3409 "2025-12-17T10:33:33Z")
Dear all, I work with Otb, Qgis and grass via the processing toolbox. I have for my area of interest: color infrared orthographic aerial (3 spectral bands: Near-infrared, red, green). For information, which I have do… --- ## [Set new pixel radiometric values based on neighborhood?](https://forum.orfeo-toolbox.org/t/set-new-pixel-radiometric-values-based-on-neighborhood/3400)
**Author:** [@image80](https://forum.orfeo-toolbox.org/u/image80)\ **Replies:** 1\ **Last updated:** [December 5, 2025, 9:39am UTC](https://forum.orfeo-toolbox.org/t/set-new-pixel-radiometric-values-based-on-neighborhood/3400 "2025-12-05T09:39:04Z")
Dear all, I work with Orfeo (especially via Qgis processing tools. I’m performing segmentations on infrared aerial images (3 bands : NIR, R, G). One of the problems comes from shadow (especially from trees) which affec… --- ## [Multi-threading read](https://forum.orfeo-toolbox.org/t/multi-threading-read/3268)
**Author:** [@ThomasDM](https://forum.orfeo-toolbox.org/u/ThomasDM)\ **Replies:** 2\ **Last updated:** [December 1, 2025, 10:29am UTC](https://forum.orfeo-toolbox.org/t/multi-threading-read/3268 "2025-12-01T10:29:26Z")
Hello I’ve noticed that the current GDAL version supports thread-safe reading of multiple files. Is there a plan to incorporate this feature in future versions of OTB for parallel file reading? Is parallel reading alrea… --- ## [Clustering segmentation (kmeans) with orfeo?](https://forum.orfeo-toolbox.org/t/clustering-segmentation-kmeans-with-orfeo/3332)
**Author:** [@image80](https://forum.orfeo-toolbox.org/u/image80)\ **Replies:** 1\ **Last updated:** [December 1, 2025, 10:02am UTC](https://forum.orfeo-toolbox.org/t/clustering-segmentation-kmeans-with-orfeo/3332 "2025-12-01T10:02:25Z")
Dear all, Does it possible with Orfeo to perform a clustering segmentation base method ? As far as i understood, with orfeo, we can perform several methods : region, edge, threshold (Mean shift), Connected components, … --- ## [Issue with starting MAJA on Ubuntu 24.04](https://forum.orfeo-toolbox.org/t/issue-with-starting-maja-on-ubuntu-24-04/3397)
**Author:** [@CAlleaume](https://forum.orfeo-toolbox.org/u/CAlleaume)\ **Replies:** 31\ **Last updated:** [November 27, 2025, 3:34pm UTC](https://forum.orfeo-toolbox.org/t/issue-with-starting-maja-on-ubuntu-24-04/3397 "2025-11-27T15:34:58Z")
Hello, I recently downloaded MAJA to to detect clouds on tiles coming from Copernicus. After sucessfully installing MAJA, starting it led to multiple issues I mostly solved. The last one I’m meeting is a status error 1. … --- ## [Issue with image segementation](https://forum.orfeo-toolbox.org/t/issue-with-image-segementation/3396)
**Author:** [@monasound](https://forum.orfeo-toolbox.org/u/monasound)\ **Replies:** 0\ **Last updated:** [November 12, 2025, 12:17pm UTC](https://forum.orfeo-toolbox.org/t/issue-with-image-segementation/3396 "2025-11-12T12:17:30Z")
I am conducting image segmentation using otbcli\_LargeScaleMeanShift on a series of Sentinel-1 time series images (30 images) that have been preprocessed. My goal is to use this segmentation to apply a Random Forest model… --- ## [Release of S1Tiling 1.2.0](https://forum.orfeo-toolbox.org/t/release-of-s1tiling-1-2-0/3394)
**Author:** [@luc.hermitte](https://forum.orfeo-toolbox.org/u/luc.hermitte)\ **Replies:** 0\ **Last updated:** [October 30, 2025, 10:24am UTC](https://forum.orfeo-toolbox.org/t/release-of-s1tiling-1-2-0/3394 "2025-10-30T10:24:14Z")
CNES and CS Group FRANCE are glad to announce the release of S1Tiling 1.2. Version 1.2 integrates the following main improvements: it can produce, and apply, gamma area maps for radiometric terrain correction as desc… --- ## [Open position at the University of Chicago](https://forum.orfeo-toolbox.org/t/open-position-at-the-university-of-chicago/3393)
**Author:** [@remi.cresson](https://forum.orfeo-toolbox.org/u/remi.cresson)\ **Replies:** 0\ **Last updated:** [October 27, 2025, 10:09am UTC](https://forum.orfeo-toolbox.org/t/open-position-at-the-university-of-chicago/3393 "2025-10-27T10:09:22Z")
Dear all, The Institute for the Study of Ancient Cultures (ISAC) from The University of Chicago is a well-known pioneer in archeological remote sensing, being one of the first to use aerial imagery in archeology. The I… --- ## [Second release candidate of S1Tiling 1.2](https://forum.orfeo-toolbox.org/t/second-release-candidate-of-s1tiling-1-2/3392)
**Author:** [@luc.hermitte](https://forum.orfeo-toolbox.org/u/luc.hermitte)\ **Replies:** 0\ **Last updated:** [October 15, 2025, 3:40pm UTC](https://forum.orfeo-toolbox.org/t/second-release-candidate-of-s1tiling-1-2/3392 "2025-10-15T15:40:44Z")
CNES and CS Group FRANCE are glad to announce the second release candidate for S1Tiling 1.2. Version 1.2 integrates the following main improvements: it can produce, and apply, gamma area maps for radiometric terrain … --- ## [Use Case: Segmentation (for photo-interprétation) without Classification?](https://forum.orfeo-toolbox.org/t/use-case-segmentation-for-photo-interpretation-without-classification/3340)
**Author:** [@image80](https://forum.orfeo-toolbox.org/u/image80)\ **Replies:** 1\ **Last updated:** [October 2, 2025, 8:44am UTC](https://forum.orfeo-toolbox.org/t/use-case-segmentation-for-photo-interpretation-without-classification/3340 "2025-10-02T08:44:30Z")
Hello, i’m taking the liberty to post a message in order to share an use case. Our need/purpose is to find existing methods/tools that would allow to perform segmentations with the aim of helping botanists for pre-map … --- ## [Role of \`S coefficient\` in Bayesian pansharpening](https://forum.orfeo-toolbox.org/t/role-of-s-coefficient-in-bayesian-pansharpening/3386)
**Author:** [@TomKenda](https://forum.orfeo-toolbox.org/u/TomKenda)\ **Replies:** 2\ **Last updated:** [October 2, 2025, 8:00am UTC](https://forum.orfeo-toolbox.org/t/role-of-s-coefficient-in-bayesian-pansharpening/3386 "2025-10-02T08:00:34Z")
Hi, I am currently working with a few WorldView2 satellite images that I would to pan-sharpen from the 1.6m native resolution to 0.4m using OTB. I have been able to do the whole process correctly but there is one thing… --- ## [First release candidate of S1Tiling 1.2](https://forum.orfeo-toolbox.org/t/first-release-candidate-of-s1tiling-1-2/3387)
**Author:** [@luc.hermitte](https://forum.orfeo-toolbox.org/u/luc.hermitte)\ **Replies:** 0\ **Last updated:** [October 1, 2025, 2:24pm UTC](https://forum.orfeo-toolbox.org/t/first-release-candidate-of-s1tiling-1-2/3387 "2025-10-01T14:24:04Z")
CNES and CS Group FRANCE are glad to announce the first release candidate for S1Tiling 1.2. Version 1.2 integrates the following main improvements: it can produce, and apply, gamma area maps for radiometric terrain c… --- ## [Errors with recent s1-tiling docker images](https://forum.orfeo-toolbox.org/t/errors-with-recent-s1-tiling-docker-images/3325)
**Author:** [@kalxas](https://forum.orfeo-toolbox.org/u/kalxas)\ **Replies:** 1\ **Last updated:** [October 1, 2025, 1:58pm UTC](https://forum.orfeo-toolbox.org/t/errors-with-recent-s1-tiling-docker-images/3325 "2025-10-01T13:58:34Z")
Hi all, I am having trouble to use the 1.1.0 version of s1-tiling docker image because I am getting errors from both peps and cds about downloading sentinel1 scenes. cds is trying the resto interface (that has been dep… --- ## [S1 Tiling with images from Planetary Computer](https://forum.orfeo-toolbox.org/t/s1-tiling-with-images-from-planetary-computer/3382)
**Author:** [@A-Geraud](https://forum.orfeo-toolbox.org/u/A-Geraud)\ **Replies:** 2\ **Last updated:** [September 23, 2025, 12:08pm UTC](https://forum.orfeo-toolbox.org/t/s1-tiling-with-images-from-planetary-computer/3382 "2025-09-23T12:08:21Z")
Hello all, I would like to use S1 Tiling in my research work, and I’ve took some time to read the documentation, but I still have a small doubt regarding the Sentinel-1 images providers compatibility with this tool. To … --- ## [OTB 9 (windows) : how to use Generic region merging segmentation? (external module)](https://forum.orfeo-toolbox.org/t/otb-9-windows-how-to-use-generic-region-merging-segmentation-external-module/3252)
**Author:** [@image80](https://forum.orfeo-toolbox.org/u/image80)\ **Replies:** 4\ **Last updated:** [August 14, 2025, 12:20pm UTC](https://forum.orfeo-toolbox.org/t/otb-9-windows-how-to-use-generic-region-merging-segmentation-external-module/3252 "2025-08-14T12:20:10Z")
Good morning, I work on a windows 11 station. I succeed in installing OTB-9.1.0-Win64 and connecting it with my 3.34.13-Prizren qgis version. I would like use “GRM” : Generic region merging segmentation", the baatz and … --- ## [Georeferencing Historical Image (2004) Using Recent Image (2025) in QGIS/OTB](https://forum.orfeo-toolbox.org/t/georeferencing-historical-image-2004-using-recent-image-2025-in-qgis-otb/3347)
**Author:** [@YureI](https://forum.orfeo-toolbox.org/u/YureI)\ **Replies:** 0\ **Last updated:** [July 3, 2025, 6:56am UTC](https://forum.orfeo-toolbox.org/t/georeferencing-historical-image-2004-using-recent-image-2025-in-qgis-otb/3347 "2025-07-03T06:56:49Z")
Hello everyone, I’m working on a project involving historical images, and I need help with georeferencing. I have: A 2025 image that is already georeferenced. A 2004 image that has no georeferencing. I would like to… --- ## [Limit a raster processing to a subset/region/mask area?](https://forum.orfeo-toolbox.org/t/limit-a-raster-processing-to-a-subset-region-mask-area/3338)
**Author:** [@image80](https://forum.orfeo-toolbox.org/u/image80)\ **Replies:** 2\ **Last updated:** [June 19, 2025, 1:29pm UTC](https://forum.orfeo-toolbox.org/t/limit-a-raster-processing-to-a-subset-region-mask-area/3338 "2025-06-19T13:29:14Z")
Dear all, I’m working in a QGIS environment (graphical interface). Specifically, I’m using a QGIS modeler. Thanks to the processing toolbar provides, i have access to QGIS, Grass, Saga, and Orfeo toolbox tools algo. My … --- ## [Aerial/sattelite image Segmentation: Not Modeling Shadows?](https://forum.orfeo-toolbox.org/t/aerial-sattelite-image-segmentation-not-modeling-shadows/3333)
**Author:** [@image80](https://forum.orfeo-toolbox.org/u/image80)\ **Replies:** 1\ **Last updated:** [June 19, 2025, 1:16pm UTC](https://forum.orfeo-toolbox.org/t/aerial-sattelite-image-segmentation-not-modeling-shadows/3333 "2025-06-19T13:16:50Z")
Dear all, With OTB via QGIS, I’m able to generate some interesting segmentations, particularly using the Generic Region Merging tool. The input image is one 20 cms aerial Ortho Infrared Color (green, red, and near infra… --- ## [Allow to unregister otbApplication in python](https://forum.orfeo-toolbox.org/t/allow-to-unregister-otbapplication-in-python/3318)
**Author:** [@ThomasDM](https://forum.orfeo-toolbox.org/u/ThomasDM)\ **Replies:** 2\ **Last updated:** [May 23, 2025, 8:38am UTC](https://forum.orfeo-toolbox.org/t/allow-to-unregister-otbapplication-in-python/3318 "2025-05-23T08:38:26Z")
Hello, I have a specific, yet simple request: Once an application is loaded, it gets cached in C++ from otbWrapperApplicationRegistry, making it impossible to reload the updated version within the same Python session. … [Next page](https://forum.orfeo-toolbox.org/latest.md?page=1)