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John Francis Coates, OBE (30 March 1922 – 10 July 2010) was a British naval architect best known for his work on the study of construction of the Ancient Greek trireme.His research led to the construction of the first working replica of triremes, the fastest and most devastating warship of Classical Mediterranean empires, and gave a greater understanding of how they were built and used.
The trireme derives its name from its three rows of oars, manned with one man per oar. The early trireme was a development of the penteconter, an ancient warship with a single row of 25 oars on each side (i.e., a single-banked boat), and of the bireme (Ancient Greek: διήρης, diērēs), a warship with two banks of oars, of Phoenician ...
3D reconstruction from multiple images is the creation of three-dimensional models from a set of images. It is the reverse process of obtaining 2D images from 3D scenes. The essence of an image is a projection from a 3D scene onto a 2D plane, during which process the depth is lost.
In graphics software, layers are the different levels at which one can place an object or image file. In the program, layers can be stacked, merged, or defined when creating a digital image. Layers can be partially obscured allowing portions of images within a layer to be hidden or shown in a translucent manner within another image.
Photoshop plugins (or plug-ins) are add-on programs aimed at providing additional image effects or performing tasks that are impossible or hard to fulfill using Adobe Photoshop alone. Plugins can be opened from within Photoshop and several other image editing programs (compatible with the appropriate Adobe specifications) and act like mini ...
This follows the trajectory of other software advances such as word processing and grammar checks, video editing, and Photoshop: functional improvements that lower barriers to creating and sharing ...
Depiction of the position of the rowers in three different levels (from top: thranitai, zygitai and thalamitai) in a Greek trireme. 19th-century interpretation of the quinquereme's oaring system, with five levels of oars. Far less is known with certainty about the construction and appearance of these ships than about the trireme.
Because of increased weight and breadth, which brought increased friction through the water, a trireme galley was not dramatically faster than a bireme. But the change to trireme produced more significant developments than a gain in tactical speed over short distances. Early bireme galleys escorted merchant ships but were rarely used to carry ...