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標題:

Size of scanned images

發問:

how to calculate the size of a scanned image for example, color depth: 24-bit picture size: 3.5'' x 4'' resolution: 100 dpi plz list out the formula for calculation.

最佳解答:

Number of dots of the scanned image = width x height x dpi (dots per inch) = 3.5 x 4 x 100 = 1,400 dots For each dot, the color depth = 24 bit = 3 byte Size of the image = number of dots x color depth = 1,400 x 3 = 4,200 bytes 2008-03-25 18:03:39 補充: Area of the scanned image = width x height = 3.5 x 4 = 14 square inch Number of dots of the scanned image = height x dpi (dots per inch) x dpi = 14 x 100 x 100 = 140,000 dots For each dot, the color depth = 24 bit = 3 byte Size of the image = number of dots x color depth = 140,000 x 3 = 420,000 bytes

 

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