rkt31
Headphoneus Supremus
- Joined
- Oct 14, 2014
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why interpolation is required can be explained with a analogy. if a 6 mp image is to be printed to 3" x2" size without any interpolation, only about 83 dots per inch printing is needed as 6mp is 3000x2000. that print will be ok considering the large viewing distance for 3" x2" print. but if you look closer in that print you will be able to see some empty spaces between the dots as 83 dots per inch are not good enough for close viweing. so to improve that aspect get the 6mp image interpolated as per 300 dots per inch in software. this interpolation will not increase actual detail but it will allow printing at 300dpi to remove any empty spaces even when watched closely. in reality we may not need beyond 6mp ( just like 16bit 44.1khz in case of audio) but accurate interpolation may improve the overall experience. further extension of analogy can be for nos dac where image is printed at 83dpi means quantization noise filter not applied. if you put an opaque diffusing screen in front of a 83dpi print, that will diffuse the empty spaces of 83dpi print with printed dots which is akin to putting s sharp roll off filter for removing quantization noise in case of nos dac, affecting the overall details.