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What are the different types of scanners?
Flatbed, Sheet-Fed, Handheld, and Drum
What is the other method of acquiring digital images besides scanning?
Digital Photography
Resampling an image is often referred to as _______.
Scaling
Scaling an image up usually deteriorates the image quality somewhat. What happens in terms of pixels and scaling up and down?
Scaling up adds new pixels, scaling down removes pixels.
The Apple iPhone 4S camera can take a digital photographs with pixel dimensions of 3264 X 2448 pixels.
A. Show the math that the resolution capability of the camera is 8 megapixels.
B. Show the math that with these pixel dimensions, the physical dimensions of the printed image are about 10-Inch ' 8-Inch if you print at 300 ppi.
A. 3264 X 2448= 7,990,272 = 8 MegaPixels
B. 3264/300 ppi = 10.88 2448/300 ppi= 8.16
Suppose that you scan a 3 inch by 5 inch photograph in at a resolution of 300 ppi.
What are the pixel dimensions of the scanned image?
900 X 1500 Pixels
What will the physical dimensions of the image be if you print it at 300 ppi, without changing the image's pixel dimensions?
3 inches X 5 inches
What will the physical dimensions of the image be if you print it at 600 ppi, without altering the image's pixel dimensions?
1.5 inches X 2.5 inches
What will the physical dimensions of the image be if you print it at 150 ppi, without altering the the image's pixel dimensions?
6 inches X 10 inches
True or False: When a digital image is printed, each image pixel is represented by one printer ink dot.
False
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