Object-Based Image Analysis

12038
15
11-23-2014 12:36 AM
MihaKlemencic
New Contributor III

Colleague said to me that ESRI's stuff had a presentation about 2 years ago in Italy where they introduced a new tool (Image Analyst?) for Object-Based Image Analysis. I made some research and cannot such kind of tool. I would like to know when will ESRI introduce such tool in ArcGIS for Desktop, because we would like to extract for example roads, buildings, rivers, vegetation from orthophotography and we do not want to buy any new software.

 

I also googled and found that people recommend Trimble eCognition, ENVI FX (which can be integrated with ArcGIS), Feature Analyst (extension for ArcGIS).

I also found that Idrisi can do it. I tried it and result is pretty good.

 

Thanks for your answers!

 

Message was edited by: Miha Klemencic

15 Replies
larryzhang
Occasional Contributor III

sorry for late, Wei Hua (I did not see yours until today),

Last 7 years, we firmly moved from the classic image analysis workflow to object-based, and have been gradually using Erdas Objective to update GIS database and (landuse) change detection over time in operation, meanwhile closely watching ESRI and other partners on this, in particular, seamlessly with imagery within Mosaic Dataset or from Image Analysis:

  • For ArcGIS Pro 1.4 (10.5), SVM offers better landuse classification results, but still do not directly produce feature extraction (roads, buildings, etc.), because of no 'effective' generalization tools available in ArcGIS (refer to the Doc).
  • For Erdas Obective, it uses 7-layer vision framework (especially with Bayesian network models), which works very accurately and effectively on the extraction and cleanup of features (roads, buildings,...), especially if only interested in new features and changes (which are real scenario in GEO Intelligence). Please refer to their Doc.  Worth to investigate if hierarchical kernel descriptors framework with SVM (already available in 10.5 & 1.4) can produce better results. It looks true, which is based on many researchers. 

In addition, for the Segmentation & Classification toolset from 32-bit ArcGIS 10.4/10.5, the performance is very poor, which looks that it does not really support the multicore algorithms. Personally, it should be investigated to ensure functional on both multicore CPUs (32-bit, 64-bit) and even GPUs (64-bit) as well....

Regards,

0 Kudos
MarkRomero
Esri Contributor

Hi Miha,

I attached a document with a workflow using Esri's new Segmentation tools available at 10.3. It's in draft mode, but good enough to share. The tools work in 10.3 and Pro. The only part not available in Pro yet is the training sample manager. You'll have to use ArcMap for building training samples.

thanks,

Mark 

0 Kudos
XanderBakker
Esri Esteemed Contributor

Thanks for sharing!

0 Kudos
AngelaVincent
New Contributor

Hi Mark - Thank you for sharing the PDF ImperviousWorkflow_LOJIC. Is this workflow now published? I noticed that you posted this over a year ago. Is this workflow based on any published articles? How should I cite this PDF? I am very interested in the image classification methods that are described in this workflow. If you are able to share any additional information at this time, I would sure appreciate this. Thanks!

0 Kudos
HuaWei
by
New Contributor II

Angela,

The PDF is based on common workflow mentioned in multiple papers, but we do not really have the specific article behind it.

0 Kudos
HuaWei
by
New Contributor II

Just a quick follow up.

In ArcGIS Pro 1.3, we introduced image classification wizard and UI tools, including a re-write of training sample manager.

With this tool, we hope to make the image classification workflow, including impervious surface mapping mentioned in Mark's pdf, much easier and user friendly.

Thanks.

0 Kudos