Part 2: Image Scanning

1. Image scanning is in many respects similar to digitization of sound.

2. A scanner samples tiny areas of the document being scanned and measures the brightness of red, green, and blue (or gray level if it is a black-and-white scanner).

3. A digital camera samples different tiny areas of the scene it is looking at, producing measures of RGB levels for each area.

4. The result in each device is a rectangular array of numbers, such as the following that might be measured for a black-and-white scanner with 4x3 resolution (only 12 dots!) and 8-bit samples:

Scan Line 0	240.0	180.7	90.3	120.0
Scan Line 1	64.0	150.8	19.4	6.2
Scan Line 2	12.3	130.5	37.7	48.6

5.The numbers in the cells are the intensity/brightness samples measured by the scanner. Complete the table of quantized (8bit) samples: (Note first one provided)

Scan Line 0	240
Scan Line 1
Scan Line 2

6. Complete the binary output table below for the sample input. The first dot is completed as an example.

Scan Line 0	11110000
Scan Line 1
Scan Line 2