Columbia subject headings:
Image processing--Congresses.
Niépce, Nicéphore, 1765-1833--Congresses.
Photography--Congresses.
Photography--Technological innovations--Congresses.
Harvard subject headings:
Image processing--Congresses.
Niépce, Nicéphore, 1765-1833--Congresses.
Photography--Congresses.
Photography--Technological innovations--Congresses.
Princeton subject headings: