41.- Think you want to print out a photograph with a size of DIN A4: 210 × 297 mm maintaining a printing quality of 200 dpi. Which resolution would the image need?
The size is in mm. It must be converted to inches since the quality (DPI) is expressed in dots per inch.
1mm = 25.4 inch
The resolution of the photograph is 1653.54x2338.58 = 3866.940 px ≈ 3.9 megapixels
42.- Which resolution would the same picture need to have a 300 dpi picture?
The size is in mm. It must be converted to inches since the quality (DPI) is expressed in dots per inch.
1mm = 25.4 inch
The resolution of the photograph is 2480.31x3507.87 = 8700.615 px ≈ 8.7 megapixels
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