From the course: Exploring Photography: Shooting in Raw Mode
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Correcting and compressing a JPEG
From the course: Exploring Photography: Shooting in Raw Mode
Correcting and compressing a JPEG
- There's something odd about your senses. If you're holding a watermelon and I hand you a second watermelon of the same weight you don't actually experience a doubling of weight. Similarly, if I doubled the amount of light in the room your eyes don't experience a doubling of illumination. In other words, your senses don't perceive increases in stimulation in a linear way. Instead, the experience increase and decrease on a curve. The sensor in you digital camera isn't like this. It's a linear device. So if you double the amount of light in a scene, the sensor records a value that's twice as big. This means that what it sees is a little different than what your eyes see or what film records. Film, like your eyes, has a non-linear response to light. Where your eyes might see this, your digital camera sees something rather different. Like this. In simple terms, your digital camera just doesn't see as much contrast. It's images appear flatter. Our eyes manage to expand contrast in a…
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