Camera Controls And Photoshop
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Transcript of Camera Controls And Photoshop
©ALEXANDRA COPLEY
Are you familiar with all of the buttons and what they can do for you?
PIXEL ミ Picture Element: digital photographs are comprised of thousands or millions of
them; they are the building blocks of a digital photo.
uncompressed (an 8 megapixel camera will produce a 8 MB Raw file)
the complete (lossless) data from the camera’s sensor
higher in dynamic range (ability to display highlights and shadows) lower in contrast (flatter, washed out looking)
not as sharp
not suitable for printing directly from the camera or without post processing
waiting to be processed by your computer
compressed fairly small in file size (an 8 megapixel camera will produce JPEG between 1 and 3 MB’s in size)
lower in dynamic range
higher in contrast and sharper
immediately suitable for printing, sharing, or posting on the web
processed by your camera
RAW files are bigger and take more space on your memory card
RAW files need post production
RAW files are better quality
RAW files give you much more control over how the image will look
Better for professional photographers
JPEG files are smaller in size and take less space to store
JPEG files do not need any post production
JPEG files loose richness, detail (sharpness), color range
JPEG files give you less ability to control the final image
Better for snapshots
Take one photo in raw and one in jpeg. Can you see the difference?
EV means exposure value
The range over which you can manually
over or underexpose to lighten or darken the image
Usually, the range of adjustment goes
from +2 to -2 EV in 1/3 steps
The camera automatically takes three or
more shots with a different exposure for each frame
One image at the camera measured exposure, a second at a negative exposure compensation (usually -1/3 EV, though some cameras allow you to specify the amount), and a third at a positive exposure compensation (usually +1/3 EV, though some cameras allow you to specify the amount)
Useful option for taking HDR scenes
Find the AEB on your camera
Simple graph that displays where all of
the brightness levels contained in
the scene are found, from the darkest to the brightest
Displays a photographs dynamic range
In camera light meter
THOUGHTFUL TIMING
COMPOSITION (RULE OF THIRDS)
PERSPECTIVE
*WHAT DO ALL OF THESE IMAGES HAVE IN COMMON?
Refers to the placement of the subject
within the frame of your photograph
Places the main subject off center and away from the center of the frame. As a result,
photos can look more dynamic and interesting
Place points of interest in the intersections or along the lines
Perspective is the way that an object appears to the eye
Dependent on focal length and picture angle
Creative way of looking at your photographic subject
Example ALEXANDER RODCHENKO, BILL BRANDT, HENRI CARTIER-BRESSON
Boring flowers become an amazing photo
ALEXANDRE RODCHENKO
HENRI CARTIER-BRESSON
BILL BRANDT
Practice photography on a regular basis
Avoid common photographic mistakes like over exposure, under exposure, or blur
Look at photographs of others to inspire
Read your manual and learn about your camera functions
Learn better compositional techniques
Don’t be afraid to experiment
PERSPECTIVE EXERCISE
Find an object/subject
Shoot 15 different ways (using rules of perspective and composition)
Get creative with angles
30 minutes
ADOBE CAMERA RAWused primarily to read and process raw image files
resulting images can be processed by Photoshop
considered a plug-in but comes with the program Photoshop
opens automatically when adjusting a .raw file
reads your camera default settings (or custom)
allows control over white balance, histogram, crop, sharpness, contrast, saturation and more
WHITE BALANCE
3 ways to adjust white balance
White balance eye dropper, settings, or temperature and tint
allows control over final color balance
• controls brightness of an image
• moves in F-stop values (f/22-f/1.8)
• latitude based on quality of camera and lens used
• Using the alt button you can find ‘clipped’ pixels of pure white if over exposing (means losing detail in highlights)
• Much like using the black eye dropper in levels in Photoshop
• Allows control over dark details in image
• Holding down the alt button allows you to see if you have ‘clipped’ any shadow detail in the image
• overall lightness adjustment
• gamma adjustment
• maintains all of the image details (shadows and highlights)
• No clipping
• Histogram not really affected
• is created by the difference in luminance
• measures difference between the colors (how stark or not)
• think of a black silhouette on a bright white sky (high contrast)
• changes intensity of a photographs colors
• high saturation will result in special effects and brighter colors
• low saturations will result in a black and white effect
• increasing too high will result in color shifts when printing
• best to zoom to 100% view of image
• used to enhance "sharpen", the detail of an image
• sharpening isn't about making a blurred image sharp; it's about getting the optimum sharpness from a photo that was shot sharp
• Smoothing also known as antialiasing, is the electronic process of eliminating or reducing noise in an image
• or averaging pixels with their neighbors to reduces contrast and simulate an out-of-focus image
• R-red channel
• G-green channel
• B-blue channel
• measures color's intensity distributed throughout the image
• an RGB histogram produces three independent histograms and then adds them together, irrespective of whether or not each color came from the same pixel
• RGB histograms can show if an individual color channel clips
• histogram is a graph counting how many pixels are at each level between black and white
• black is on the left
• white is on the right• the height of the graph at each point depends on how many pixels are
that bright
• lighter images move the graph to the right
• darker ones move it to the left
• can be used as in camera light meter for exposure
• a little bit of clipping is OK on things like the highlights of sun dancing on water (specular highlights)
• overexposed digital images are almost useless. Anything that washes out to white is gone forever
• images that are too dark are easy to correct later; just drag the right slider in Photoshop's Levels command to the left to meet the edge of the histogram
In this histogram you'll see a peak on the left at 100% black, even when overexposed. This is the dark shadow on the left of the photo. This shows that the camera's contrast needs to be lowered, or better still, add fill light in the shadows.
Overexposed histogram means loss of detail in the highlights
• taking your photograph to new creative heights
• useful tips that will improve your Photoshop
• skills such as editing, enhancing, practice, tutorials, subscribing to galleries and forums and reading magazines
INTERFACE AND TOOLS
http://www.tutorial9.net/photoshop/photoshops-basic-tools/
The Crop Tool allows users to redefine their active image area but not resize the ENTIRE image. It’s sort of like cutting out a smaller picture from a larger photo with a pair of scissors.
There are several healing tools in Photoshop which are used to repair imperfections in images, or handle blemishes and red-ey
With the Clone Stamp Tool, a user may select a source starting point somewhere on an image, and then paint elsewhere using that starting point as a reference, effectively cloning the source.
The Eraser Tool can be used to erase parts of an image, selection, or layer
The Sharpen Tool is used to sharpen edges in an image, while the Blur Tool burs edges. The Smudge Tool smudges an image, similar to using fingerpaint.
The Dodge Tool lightens parts of an image while the Burn Tool darkens. The Sponge Tool is used to saturate, or desaturate parts of an image.
• http://zentextures.com/
• http://www.smashapps.org/2009/07/42-free-photoshop-textures.html
• http://www.vectorportal.com/
• Photoshop functionality can be extended by add-on programs
• most common type are filter plug-ins that provide various image effects
• many free plug-ins online
• http://coffeeteaphotography.blogspot.com
• http://tutorialblog.org/free-photoshop-plugins/
The best way to learn anything new is to experience it for yourself
• http://psd.tutsplus.com
• subscribe to a few that you like the most so you don't miss out on new posts (you may also want to bookmark other tutorial sites in case you want to find them in the future)