photogram
英 ['fəʊtəgræm] 美 ['foʊtəˌgræm]

n.

黑影[物影]照片（将物体放在光源和感光体之间制成）；

英英释义

Photogram

• A photogram is a photographic image made without a camera by placing objects directly onto the surface of a light-sensitive material such as photographic paper and then exposing it to light. The usual result is a negative shadow image that shows variations in tone that depends upon the transparency of the objects used.

以上来源于:Wikipedia

权威例句

On the compensation for chance agreement in image classification accuracy assessment, Photogram
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