descriptive image

Multispectral Imaging Summer Snapshots

If you are a regular Bitstreams reader, you know we just love talking about Multispectral Imaging.  Seriously, we can go on and on about it, and we are not the only ones.   This week however we are keeping it short and sweet and sharing a couple before and after images from one of our most recent imaging sessions.

Below are two stacked images of Ashkar MS 16 (from the Rubenstein Library).  The top half of each image is the manuscript under natural light, and the bottom are the results of Multispectral imaging and processing.  We tend to post black and white MSI images most often as they are generally the most legible, however our MSI software can produce a lot of wild color variations!  The orange one below seemed the most appropriate for a hot NC July afternoon like today.  More processing details are included in the image captions below – enjoy!

The text of this manuscript above was revealed primarily with the IR narrowband light at 780 nm.
This image was created using Teem, a tool used to process and visualize scientific raster data. This specific image is the result of flatfielding each wavelength image and arranging them in wavelength order to produce a vector for each pixel. The infinity norm is computed for each vector to produce a scalar value for each pixel which is then histogram-equalized and assigned a color by a color-mapping function.

Leave a Reply

Your email address will not be published. Required fields are marked *