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Optical resolution
This is a measure of how much information is actually captured by a scanner. It is measured in dpi (dots per inch). Scanning up to 600 dpi is ample resolution for most document scanners. A photo scanner captures up to 4800 dpi.
Enhanced resolution
Enhanced resolution refers to the resolution that can be achieved when computer software takes the data that’s been optically captured in a scan and makes an “educated guess” about additional information to provide a more detailed image.
Six-color scanning
Most scanners capture a range of tones based either on three (RGB) or four (CMYK) basic colors. With a second lamp, many HP scanners capture permutations of six basic colors, delivering scans with a wider gamut of color.
Color bit depth
Bit depth is the number of bits used to represent each pixel. Color bit depth measures how many colors a scanner can recognize and translate into digital information.
While 48-bit scanners offer a wide spectrum of color, many HP Photo scanners and some HP Photosmart All-in-Ones offer 96-bit depth, allowing for optimal noise reduction and color accuracy.
Grayscale levels
HP scanners come with a standard of 8-bit grayscale, meaning they can capture 256 shades of grey between white and black, allowing for a smooth transition between tones.
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