![]() ![]() My flowchart for identifying white pigments shows clearly that UVR and UVF are sufficient to differentiate zinc white and titanium white from the other two whites, lead white and lithopone. MultiSpec can identify zinc white and titanium white using the multispectral 8 channels image file. So, I did expect it to be more successful and, indeed, It was able to identify zinc white and titanium white while could not differentiate among lead white and lithopone. MultiSpec can now look at the behavior of those pigments in 8 channels rather than just the 3 visible channels. Multispectral images of the test paper painted with 4 white pigments. I can add now to the visible image the other multispectral images, UV Fluorescence (3 channels), UV Reflected (1 channel), Infrared (1 channel) and logically link them into a 8-channels multispectral file which I can feed to MultiSpec. MultiSpec tries to identify the pigments using just the visible image and it fails. Though, this is what I would have expected, since the pigments look pretty the same in the visible photo. ![]() The software cannot identify the pigments just using the visible image. I ran MultiSpec and the result is pretty disappointing. four areas for the pigments and one for the paper. Visible photo with training areas indicated in Multispec. Visible Light Photo of the test paper with four white pigments. This is the area where hopefully MultiSpec would be able to identify the pigments. On the right I painted a line and some letters. I need to tell MultiSpec what is lead white, lithpone and so on. These would be the “training areas” for the software. This extremely durable, hard wearing finish can be cleaned repeatedly making Multispec the perfect match for. Wouldn’t be nice, I thought, to be able to differentiate among them just using a multispectral imaging camera? On the left I painted one spot for each pigment. MULTISPEC MULTICOLOR 1 Form: GHD-81 Rev.: 101218 DESCRIPTION AND USES Multispec Multicolors is a low odor, low VOC, water-based multicolor paint recommended for walls, ceilings, trim, fixtures, countertops and decorative accessories. I painted a piece of paper with the four most common white pigments: lead white, lithopone, titanium white and zinc white. Then it’s up to you figure out how to apply it for your specific art examination tasks. On their website you’ll find tutorials and examples to learn and master it, so, I’ll just give here a very simple example of its application for examination of art. This post introduces MultiSpec,the Multispectral Image Data Analysis software that I use. Multispec Fine Fleck is an interior architectural multicolor spray paint specifically designed for application with airless spray equipment but versatile. ![]() Pigments Checker (TP-MSI calibration card included).Valeria – Panoramic Head for IR Reflectography.Pitty – Polarized Light Photography Kit.Course: Panoramic Infrared Reflectography.Gorgias – Reflectance Spectroscopy system.Infrared Fluorescence Photography (IRF).Infrared False Color photography (IRFC). ![]()
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