The discovery of photography in 1839 by daguerre(1789-1851)was chiefly responsible for early attempts to extend the gaussian theory . 1839年，达格雷（1789-1851）发现了照相术，当初推广高斯理论的一些尝试，主要有赖于这一发现。
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The discovery of photography in 1839 by daguerre ( 1789 - 1851 ) was chiefly responsible for early attempts to extend the gaussian theory 1839年，达格雷（ 1789 - 1851 ）发现了照相术，当初推广高斯理论的一些尝试，主要有赖于这一发现。
