Students learn better from words and pictures than from words alone.

THE DIGITAL CAMERA

Students learn better from words and pictures than from words alone.

Acquire images Analyze images Create image-based works Communicate ideas and understandings Activities involving images may begin at any phase and often will cycle back and forth among different phases.

Clip Arts Still Photographs Animations Movie Clips Internet based resources Scanners Digital cameras (including movie cameras) Resource software

Why Images in Education Students from Previous Generations Today s Digital Students Passive Communicators Single taskers Work oriented Linear thinking Nonrelevancy learning relevancy was not critical to learning Single sensory input Text-based first Reality-based Conventional speed Hypercommunicators Multitaskers Play oriented Random access Learning has to be relevant and fun Multisensory input Digital and graphics first Fantasy-based learning Twitch speed

DECIDE WHAT SHOOTING MODES YOU WANT? Many digital cameras offer special modes that optimize the camera settings for specific types of scenes and lighting types. Landscape, portrait, twilight, and pan-focus are among the most common scene modes. For lighting conditions, sunny, cloudy, incandescent, or fluorescent are common options. Look for a camera that offers scene modes that correspond to your favorite photo subjects. If you think you'll use this feature a lot, make sure that the camera you buy gives you easy access to it through a button or a dial, instead of making you hunt through the LCD menu to find it. Many digital cameras offer voice recording and movie capture, but don't expect camcorder-like results.

TYPES OF DIGITAL CAMERAS

HOW A DIGITAL CAMERA WORKS

ASCII CODE

ASK ABOUT THE TYPE OF MEMORY, INTERNAL MEMORY, MEMORY CARD TYPE

AS A GENERAL RULE, THE FOLLOWING SIZE MEMORY CARD IS A RECOMMENDED MINIMUM: 512 MB or higher for a 5 megapixel digicam One GB or higher for a 6 megapixel digicam Two GB or higher for an 8 megapixel digicam Four or more GB - if you shoot a lot of video or have a camera with 10 or more megapixels.

IMAGE RESOLUTION The image resolution is measured in pixels (short for picture element). The image quality increases with the number of pixels. For example, an image sensor measuring 3,072 pixels across by 2,048 pixels high has a resolution of 6,291,456 pixels, more commonly referred to as 6.2 megapixels. (Chris Weston, p.26)

IS MORE PIXELS ALWAYS BETTER? The more pixels in your image, the smoother and clearer the image will appear. Of course, the more pixels in your image, the more data your camera and computer have to store for that photo.

THE QUALITY OF YOUR CAMERA S LENS AND SENSORS ALSO DETERMINE THE QUALITY OF YOUR IMAGE. Interchangeable lens 30x Zoom Fixed lens 3.75 x Zoom Lens Quality Matters

WIDE ANGLE VS. TELEPHOTO

SENSOR SIZE IS RELATED TO IMAGE QUALITY The smaller point and shoot cameras have sensors which are many times smaller than prosumer and professional dslrs, and therefore, the image quality is less for the smaller point and shoot cameras.

SENSOR SIZE DIFFERENCE

DIGITAL ZOOM VS. OPTICAL ZOOM Optical zoom is achieved by optical means, adjusting the lens configuration to enlarge the image. Digital zoom merely takes the data from the central pixels of an image and enlarges them to the full size of the image. The result is a lowresolution image blown up to highresolution dimensions.

WHICH ZOOM PROVIDES THE BETTER QUALITY?

MINIMUM RESOLUTION FOR PRINT SIZE Print Size(in) Minimum Pixel Dimensions Resolution 3 x 2 600 x 400 240,000 6 x 4 800 x 600 480,000 7 x 5 1,400 x 1,000 1,400,000 (1.4 Megapixels) 10 x 8 2,000 x 1,600 3,200,000 (3.2Megapixels) 10 x 17 At least 5 Megapixels

MEMORY CARD CAPACITY Memory Card Capacity* Camera File size* 2GB 4GB 8GB 16 GB 5 MP 1.5 MB 1200 2500 5100 10300 6 MP 1.7 MB 1100 2200 4400 8900 8 MP 2.3 MB 800 1650 3200 6650 10 MP 2.9 MB 650 1300 2600 5200 12 MP 4.6 MB 400 800 1600 3250 VIDEO 5 Mbps (EP) 45 90 180 360 *average file size for a high resolution JPEG Source: Lexar Media

CHECK FOR IMAGE FILE FORMAT Two popular file formats are TIFF and JPEG. The TIFF files format saves the image uncompresed. All of the image detail is captured and stored, but the file size can be large. The JPEG file format is compressed. The resolution of the image may be the same as a TIFF file, but some detail may be lost in the image. (Shelly Cashman, p.314-315)

REMEMBER Use digital images in your classroom to effectively communicate content in a manner which engages and motivates the learners.

References: www.google.com