Hyperspectral images

Our images are available in the following formats:

• The hyperspectral image as a PCA reduced image
• A MATLAB MAT file with colorspace representations, including:
  • Linear RGB image for for a SONY OLED PVM-2541A
  • Gamma corrected RGB image for a SONY OLED PVM-2541A
  • CIE1931 XYZ color space
  • CIE1931 xyY chromaticity diagram
  • CIELAB color space
  • CIELUV color space
  • MB-DKL color space (for a SONY OLED PVM-2541A)
  • LMS color space (using the Stockman-Sharpe cone fundamentals found here in the section marked, "CIE 2006 LMS functions")

NOTE: To use the PCA reduced images, you will want to make use of our readCompressedDAT.m function in MATLAB. It can be found here.

We took images of the skins and the internals of our fruits and vegetables. The images are available for:

• Skins
• Internals

NOTE: The images presented on this webpage are the original, un-modified images that come from our hyperspectral camera, so they will appear different from the images in our published report, since those were modified for visibility purposes when printed. The gamma-corrected RGB images may appear dark, but this is not of any concern. The images were recorded at a luminance of 36.97 cd/(m^2), which is bright enough for reliable hyperspectral measurements.

For most purposes, you will also want to use image masks, in order to segment the object in each image from the background. The image masks for the skins and internals are available at the following links:

• Skin image masks
• Internal image masks

If you need access to the original hyperspectral data, then please send us an email, as the raw data is large and would put undue strain on our server.