Basic Digital Camera Concepts
How a digital camera works
The Sensor
Additive Primary RGBSecondary Primary CYM
RGB Channels
The Sensor
The Bayer PatternColor Filter
BGBGBGBGBGBGBGBGBGBGBGBBGBGBG GRGRGRGRGRGRGRGRGRGRGRGRGRGRG
Interpolation
The process of interpolating is called “demosaicing”
Note: Dirty Sensor
NOTE: B&W vs. GRAYSCALE
Technically, in digital photography we make grayscale images, AKA Black & White conversions, using the color channels during the conversion.
Color SpaceVarious Mathematical models to represent color as it applies to JPEG camera settings
sRGBWeb
Adobe RGBPrints
Color GamutColor gamut choices are important when printing from JPEG files.
For better prints, set your camera to Adobe RGB (wire frame) for printing from JPEGs. A RAW file does not require a choice of color gamut. (sRGB (solid) is smaller and standard for web.)
JPEG & RAW
Camera processed JPEG
UnprocessedRAW
Applies sRGB Or Adobe RGB
JPEG & RAWJPEG
No correctionsJPEGAuto
corrections
RAW unprocessed
RAW auto
processed
RAW File as shot RAW File processed RAW File B&W Conversion
RAW FILES
• Are not compressed• Are larger & take up more memory • Are processed and converted by you (not your camera)• Are proprietary (not universal like JPEGs) i.e. NEF & CR2• Are at least 8-bits in color• Are NOT restricted by sRGB or Adobe RGB color spaces• Have more latitude for adjustments in the highlight and
shadows• (Are sometimes admissible in a court of law, forensics)• Are what you will be shooting with after the first assignment
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