Heliography
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Heliography is an early photographic process, based on the hardening of bitumen in sunlight. It was invented by Nicéphore Niépce around 1822. Niépce used the process to make the earliest known survivi
This earliest known surviving heliographic engraving, printed from a metal plate made in 1825 by Joseph Nicéphore Niépce using his "heliographic process". The plate was exposed under an ordinary engraving. Heliography was also used to capture a scene directly from nature with a camera.
Comparison between the original engraving and the heliography of Joseph Nicephore Niépce. Left: Engraving of Portrait of Georges d'Amboise, 1650 right: Heliography (Heliogravure) of the engraving, 1826
View from the Window at Le Gras, by Joseph Nicephore Niepce, 1826 or 1827, France - Harry Ransom Center - University of Texas at Austin
View from the Window at Le Gras is the oldest surviving photograph. It was created by French inventor Nicéphore Niépce between June 4 and July 18, 1827, in Saint-Loup-de-Varennes, France, and shows pa
Heliography
…in sunlight. It was invented by Nicéphore Niépce around 1822. Niépce used the process to make the earliest known surviving photograph from nature, View from the Window at Le Gras (1826 or 1827), and the first realisation of photoresist as means to reproduce artworks through inventions of photolithography and photogravure. Nicéphore…
The original plate, showing rooftops visible from a second-story bedroom window
Demonstration of camera obscura. The original image gets rotated and reversed through a small hole onto an opposite surface.
Gernsheim's enhanced version