The Image > Mode > 16 Bit / Channel command changes the active image's bit depth into 16 bit. Then every one of the resulting image's pixels can take on one of 65536 values. All of the supplementary image information, e.g., image calibration and drawing objects, will be retained in this conversion.
Note: When you increase an image's bit depth, this does not alter the image's appearance. Thus, the resulting image does not contain more image information. Please note, however, that the file size increases considerably, since one single pixel can then take on considerably more values.
8-bit gray-value image
The source image's gray values (0-255) will then be spread over the value range of a 16-bit gray-value image. Converting it into a 16 -bit gray-value image, does not alter the image's appearance.
FT image
If the source image is an FT image, the Image > 16 Bit / Channel command carries out an inverse Fourier transformation. To carry out a Fourier transformation, use the Image > Mode > 32 Bit Complex command.
You can find more information on this topic here.
See also
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