ODSI-DB – Oral and Dental Spectral Image Database

ODSI-DB is an image database of oral and dental reflectance spectral images of human test subjects. Image sets of the test subjects contain the front-view and the occlusal surfaces of lower and upper teeth, oral mucosa, and face surrounding the mouth. Other features-of-interest have been imaged on case-by-case basis. The spectral images in the database have been annotated by dental experts.


For citing the database, please use the following publication:
Joni Hyttinen, Pauli Fält, Heli Jäsberg, Arja Kullaa, and Markku Hauta-Kasari, ”Oral and Dental Spectral Image Database—ODSI-DB”, Applied Sciences 10(20), 7246 (2020).


The ODSI-DB is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0). It is free to publish research containing results derived from this databaseas long as the database is cited properly.

Dataset preview

We have provided a dataset preview tool here.
The preview tool lists annotation classes on the top of the page where the user may select which images are shown.


The database is available for download here. The oral and dental spectral image files are multipage TIFF images. The first
page contains a 24-bit RGB preview image, followed by grayscale spectral band images (16-bit grayscale). The files utilize tag system of TIFF files to store the spectral band center wavelengths in tag 65000 as list of 32-bit floating point values, and tag 65111 to store a free-form ASCII metadata string. The metadata string contains information about the imaging setup, image processing and miscellaneous measurement data (blood pressure and oxygen saturation before and after measurement).

Annotation files are likewise multipage TIFF images. Each page of the annotation image file contains a binary black-and-white mask image and has the annotation class stored as an ASCII-string in tag 65001.

Python functions for reading and writing spectral image TIFFs and annotation mask TIFFs are provided in the spectral_tiffs.py file in the database root directory.

Complete spectral image database is 34 GB in size.


For further questions or any issues regarding the ODSI-DB database, please contact the Spectral Color Research group, Professor Markku Hauta-Kasari, by email markku.hauta-kasari@uef.fi.