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Digital Photography Made Easy
Digital Photography Made Easy
With Jim BattlesBattles Photography
Digital Photography Made Easy
Digital Photography Made Easy
…or so we think
Disclaimer:Disclaimer:
Although I use digital photography daily and am the
one teaching this class…
Disclaimer:Disclaimer:
…I’m still learning too.
Digital vs. filmDigital vs. film
•lower costs after startup•more efficient workflow
•no scan/sep costs•instant gratification
HardwareHardware
Camera:•professional vs. consumer
•controls•MP rating
HardwareHardware
Camera:•optical or digital zoom
•media
HardwareHardware
Computer:•Lots of RAM
•Color calibration•Data transfer interface
SoftwareSoftware
•Image capture•Image manipulation
(Photoshop, etc.)
Image controlsImage controls
•white balance•color balance
•sharpen•compression
•zoom (optical)
Image controlsImage controls
General rule of thumb:Don’t use most image control
functions in-camera. Apply them afterward.
Remember:Remember:
All rules of photographystill apply!
TermsTerms
Capture:The act of taking a digital
photograph
TermsTerms
CCD:Charge Couple Device, the image capture area in the
camera
TermsTerms
Removable Media:Temporary storage of data in
camera
TermsTerms
Formatting:The act of initializing or
erasing images from removable media
TermsTerms
RGB:Red, Green, Blue
The colors computers work with
TermsTerms
CMYK:Cyan, Magenta, Yellow, Black,The colors printers work with
TermsTerms
Pixel:The basic building block of
digital (bitmap) images
TermsTerms
Mega Pixel:Millions of pixels; total
number of pixels captured by a camera
TermsTerms
File format:“Container” into which digital
data is stored
TermsTerms
File formats:•TIFF•JPEG
•RAW (NEF, etc.)
TermsTerms
Resolution:Number or size of pixels in an
image
You say you want a Resolution…
Did you know….Did you know….
All digital photographs are actually black and white
images
Example:Example:
2 bit color
TermTerm
Bit:Binary digit; 0 or 1,
Black or white
Example:Example:
greyscale
TermTerm
Greyscale:An image rendered in black,
white and shades of grey
ExampleExample
full color
2 bits, 4 bits, 8 bits,A dollar?
No, a channel
ExampleExample
another full color
ResolutionResolution
Pixel depth/ bit depth:How many bits of information
per pixel is captured
ResolutionResolution
2 bits x 2 bits x 2 bits= pixel depth of 8 bits
GreyscaleGreyscale
An 8-bit greyscale image can render 256 different tones
from black to white
Let’s do some mathLet’s do some math
Red chanel=256 tonesX Green chanel= 256 tonesX Blue chanel= 256 tones
=16,777,216 possible colors
ResolutionResolution
Factors: pixel depth, image size and resolution (dpi)
•Affects file size
ResolutionResolution
•8x10 image @ 600ppi1 bit (B&W)=3.6 MB
8 bits (greyscale)=28.8MB24 bits (RGB)=86.4 MB
32 bits (CMYK)=115.2 MB
ATTENTION!ATTENTION!
The “powers that be” request that you pay specific
attention to the following information
ResolutionResolution
For commercial printing:dpi/lpi/ppi
300
ResolutionResolution
@ 300dpi:1 MP = 3”x 3”2 MP= 3”x 6”
3 MP= 5.6” x 5.6”4 MP= 6” x 6”5 MP= 7” x 7”
6 MP = 6” x 20”16 MP= 13”x13”
ResolutionResolution
Please note that screen resolution is 72 dpi
Image controlsImage controls
Many found in-camera are also found in image
manipulation software
Image controlsImage controls
Save images unchanged:•treat like negatives
•backup in case of error
Image controlsImage controls
White Balance:Camera setting to match the
lighting conditions
Image controlsImage controls
Color balance:Image settings between
cyan/red, magenta/green, yellow/blue
Image controlsImage controls
Sharpen vs USM(UnSharpMask)
TermsTerms
Artifacts:Nasty, little globs of high
contrast goo from oversharpening
TermsTerms
Noise:Specks in image due to long exposure time or high ISO
ExampleExample
noise
TermsTerms
Interpolation:Creating pixels from existing
pixels•lowers image quality
Image controlsImage controls
Histogram:Chart of greyscale values in
an image
OK, lets do the rest in Photoshop
OK, lets do the rest in Photoshop
Shut down this foul Microsoft application!
