GeoAI SAM

prasanthkrishnavarman

Eu usei o novo Text SAM (Segment Anything Model) disponível no Esri India Living Atlas para detectar edifícios a partir de uma imagem de satélite com resolução de 0,3m usando o comando de texto "Buildings." No entanto, o modelo detectou apenas alguns edifícios. Como melhorar a precisão da detecção do Modelo Text SAM? Além disso, existe uma maneira de ajustar finamente o modelo SAM para obter melhores resultados? <\/SPAN><\/SPAN><\/P>

SwastikaDas

The issue you're encountering may be due to the varying sizes of buildings in the satellite imagery. For instance, in an urban context, there are buildings of small, medium, and large footprints.  Although deep learning models are typically trained on multiple imagery resolutions, the variation in building sizes can pose challenges. To improve detection, try manually adjusting the cell size in the environments tab of Detect Objects Using Deep Learning tool between 0.1 to 0.5. This should enhance detection across all building sizes. For more details, refer to this blog post: "https://www.esri.com/arcgis-blog/products/arcgis-pro/analytics/multiresolution-object-detection-with-text-sam/?srsltid=AfmBOoohMVcSgbSg-K_J2jtp9HCdvsALOdiEeKT02Ss-d15y2ZU_Pk6L"
Regarding your second question, yes, the SAM model can be fine-tuned. The SamLoRA model, a variation of SAM now available in ArcGIS, introduces trainable layers called Low-Rank Adaptation (LoRA) to the frozen image encoder of SAM. You can train the SamLoRA model to detect specific features of interest for more accurate results.