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By Brianna Wray
The Times 

Tech Talk: Images


October 3, 2019

Dorothea Lange

Migrant Mother: A famous example of a continuous-tone image

There are several factors that contribute to the way an image looks in print. Digital images have the added bonus of illumination behind the image, defining edges and sharpening image quality by default.

JPEG files compress their data to achieve a smaller, more portable file size. Likewise emailing images imposes upon them compressions that affect the quality. This compression is accomplished by discarding some of the data that comprises the image. Each time a JPEG is opened and re-saved in the JPEG file format, the image degrades. If you acquire an image from a library, museum, or stock...

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