take notes in your journal Monitors Small LCD displays built into most cameras Menus are displayed on monitor Compose your image on a monitor Review images on the monitor Drains battery when monitor is on ID: 588725
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Slide1
Digital Images and Digital Cameras
take notes in your journalSlide2
Monitors
Small LCD displays built into most cameras
Menus are displayed on monitor
Compose your
image on a monitor
Review images on the monitor
Drains battery when monitor is on
Glare can be a problem
Good for close ups and odd anglesSlide3
Viewfinders
Great for fast action (capturing the moment)
Do not drain the battery
Optical viewfinders On SLR cameras see exactly what the lens sees
Viewfinders on point and shoot cameras show the scene through a separate window that is slightly offset. (You may end up with an image slightly different than you expect.)Slide4
Capturing images
Hold the right side of the camera with your right hand while supporting the lens or camera body with your left
Decisive moment – can be hard to capture with digital cameras.
First and second delay affect how quickly a series of photos can be taken.(frame rate)
If it takes too long for the image to clear you miss the shot.Slide5
Buffers
Buffers speed up the time an image takes to move from the image sensor to the card.
Buffers are fast memory that allow you to take many photos quickly.
Continuous mode is a feature on some cameras. With this mode you can hold the shutter button down and continuously take pictures.Slide6
What is a digital photograph
Digital photographs are made up of millions of tiny red, green and blue forming pixels.
Dots make up all types of images
Newspaper (halftone)
Monitor (pixels)
Inkjet printer (bitmap)Slide7
The Image Sensor
The“film
” of the digital camera
A silicon chip with a grid of millions of photosensitive diodes that capture light.Slide8
Digital Color
Image sensor can only capture brightness, not color
The light is recorded in a gradual scale from absolute black to absolute white. (Gray Scale)
Color is created in much the same way as the first color photography.Slide9
Digital color is created by applying filters through a process called interpolation.
The color you see on your monitor depends on the settings and capabilities of your computer.
Some image file formats cannot see all of the colors. RAW and tiff are file formats that can see all of the colors. Slide10
Selecting an image size
Relative size is determined by the device used to display it.
Absolute size is determined by the number of pixels used to create it.
Size is specified in one of two ways
Pixel dimensions (3072x2048)
Total number of pixels it contains (6.29 million pixels)
Pixelization occurs when an image with a lower pixel number is made too big.Slide11
Edit a photo in its largest file size and then reduce the size if needed.
Cameras capable of large image sizes are more expensive.
Think about what you are going to do with your images before you decide on a camera
On the web – lower resolution (number of pixels)
Inkjet or laser print-200-300 pixels per inch
Professional printing – at least 900 pixels wide.Slide12
Selecting an Image Quality
What is file compression?
Name some image file formats
Why is raw different from other file formats?
Why is jpeg referred to as “
lossy
” compression?