Update README.md

Author: r0f1

README.md

@@ -197,6 +197,7 @@ Bland-Altman Plot [1](https://pingouin-stats.org/generated/pingouin.plot_blandal
 [unprocessing](https://github.com/timothybrooks/unprocessing) - Image denoising by reverting the image processing pipeline.  
 
 #### Microscopy
+[BD Spectrum Viewer](https://www.bdbiosciences.com/en-us/resources/bd-spectrum-viewer) - Calculate spectral overlap for fluorescence microscopy dyes.  
 [Tree of Microscopy](https://biomag-lab.github.io/microscopy-tree/) - Review of cell segmentation algorithms, [Paper](https://www.sciencedirect.com/science/article/abs/pii/S0962892421002518).  
 [cellpose](https://github.com/mouseland/cellpose) - Cell segmentation. [Paper](https://www.biorxiv.org/content/10.1101/2020.02.02.931238v1), [Dataset](https://www.cellpose.org/dataset).  
 [MedMNIST](https://github.com/MedMNIST/MedMNIST) - Datasets for 2D and 3D Biomedical Image Classification.