Midterm - Digital Photography Flashcards
Resolution
Describes both pixel count and pixel density
Camera Resolution
measured in Megapixels
Screen Resolution
measured in PPI, pixels per inch
Printer Resolution
measured in DPI, dots per inch
File Types
JPEG
TIFF
RAW
JPEG
Convenient for usage
Compression allows for more images on cards
Should use highest compression for image making
Constant saving causes degergation of the image
TIFF
Lossless file format
Uses large amount of memory for images
Excellent for storing or archiving images
RAW
Actually not a file format
Larger than Jpeg files, smaller than Tiff files
Gives great flexibility during the conversion process
White Balance
A digital camera’s ability to record an image with an accurate color balance
Exposure
is the moment when the light strikes the film or sensor and the image is recorded
3 Factors combine to determine correct exposure for a digital image
ISO
Shutter Speed
Aperture
ISO
The sensitivity of the sensor or film
determines a digital camera’s sensitivity to light
Lower number(Brighter light Situation) Finer detail lower noise
Higher number (Lower light Situation) Loss of detail, more noise
100 200 400 800 1600 3200
Shutter Speed
The length of time that the sensor is exposed to light
1 1/2 1/4 1/8 1/15 1/30 1/60 1/125 1/250 1/500
1/1000
Aperture
The amount of light that strikes the CCD or CMOS sensor
2.8 4 5.6 8 11 16 22 32
What is considered good exposure?
Not too bright and not too dark:
Too bright – overexposed
Too dark – underexposed
