3/21/2024 0 Comments Nikon scan 4.02 update![]() ![]() "Compressed" files (for Nikon in any case) run a "slightly lossy" encoding and a subsequent non-lossy compression algorithm that discards some highlight detail and is described well at : Thus for a given bit-depth a camera NEF is about one third the size of a scanner NEF. One site has a red value, the next a blue and the next a green (actually there are two greens but we'll leave that aside for the moment). Camera raw files have only one value per picture element ("photo site"). The files expand with bit depth and image size in a non image-dependent way.Ĭamera NEFs come in two flavours: "compressed" and "uncompressed". There is a bit more for the previews and header information in the file. Thus if you have an RGB image 1024 x 1024 and scan at 8 bits you get 1 megabyte of data each for the red channel, green channel and blue channel - i.e. It contains three data values at each picture element (pixel). The Nikon Scanner NEF (as distinct from the camera NEF) is essentially a variant TIF file. It's an efficient "output format" for transmitting and producing final prints. Although it's good enough to look at, it's not really good enough if you're going to manipulate the image significantly, as the cracks begin to show quite readily. It's been fairly carefully formulated to be "good enough" to look at images and it's highly adaptive to image content, so there's no easy way to estimate file sizes with any useful precision. The JPEG format is a lossy compression of the original image data. I can answer this (if the OP is still interested). ![]()
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