NASA Technique Reveals Ancient Images
NASA's decorrelation stretch technique reveals ancient images, archaeology breakthrough
Introduction To Decorrelation Stretch
A technique developed by NASA's Jet Propulsion Laboratory, known as decorrelation stretch, has been used to reveal ancient images that were previously invisible to the naked eye. This method, which heightens contrasts in digital imagery, was originally designed to study the Martian surface but has since been applied to the field of archaeology with remarkable results. Jon Harman, a rock art enthusiast and retired medical imaging professional, stumbled upon the technique while browsing NASA images and recognized its potential for studying ancient, faded images.
Development And Application Of Dstretch
Harman developed a plug-in for the open-source program ImageJ, called Dstretch, which applies the decorrelation stretch algorithm to digital images. He has fulfilled around 200 requests for Dstretch per year and has also created smartphone apps that mimic the technique. The apps have been downloaded thousands of times, and papers have been published describing Dstretch's usefulness in archaeology. The technique has been used to spot and clarify imagery at ancient sites in Norway, Egypt, Canada, and many other locations, including the discovery of around 200 paintings in the central tower of Angkor Wat, an ancient Cambodian temple.
Scientific Mechanisms Behind Decorrelation Stretch
The decorrelation stretch algorithm works by heightening contrasts in digital imagery, making features easier to spot. This is especially useful for studying ancient rock art, which often fades over time due to exposure to the elements. By applying the algorithm, researchers can enhance the visibility of these images, revealing details that were previously invisible. The technique has also been used to examine tattoos on mummified human remains and to find buried remains of ancient Greek buildings, demonstrating its versatility and potential for application in various fields.
Real-World Implications And Future Outlook
The use of decorrelation stretch in archaeology has significant implications for our understanding of ancient cultures and civilizations. By revealing previously invisible images, researchers can gain new insights into the lives and practices of ancient people. The technique has already been used to study ancient rock art, and its potential for application in other fields, such as anthropology and history, is vast. As the technique continues to be developed and refined, it is likely that we will see even more remarkable discoveries in the future.
Conclusion And Future Directions
In conclusion, the decorrelation stretch technique developed by NASA's Jet Propulsion Laboratory has been successfully applied to the field of archaeology, revealing ancient images that were previously invisible. The technique has significant implications for our understanding of ancient cultures and civilizations, and its potential for application in other fields is vast. As researchers continue to develop and refine the technique, we can expect to see even more remarkable discoveries in the future.
Sources
This is an original synthesis by Qivorane based on reporting from the outlets below.