Scanning Microscopy


Small differences between two complex and closely-similar photographs may be located by viewing the uniformly illuminated pair with a stereoscope. Provided the observer possesses normal stereoscopic vision, any non-common elements will appear to stand above the general picture plane provided by the fused common background. It is emphasised that the images being examined are not a conventional stereo-pair, although the left- or right-eye member of such a pair may be so compared with its counterpart in a subsequent stereopair. This stereoscopic technique was found preferable to the alternative 'blink' method for most scanning microscope images, although it is advantageous to have both methods available.

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