During recent work, using the Mach3 Impact / Laser Engraving plugin when engraving photographic images into wood (similar to the one shown in the previous post) it became apparent that in order to re-produce the lighter shades the required laser output power was burning too deeply into the darker portions and loosing some of the detail present in those areas.
To offset this problem I have made a small change to the plugin’s .dll to incorporate a user selectable Greyscale Compression feature the function of which is shown in the following picture. This function essentially alters the ratio of output pulses in relation to pixel value so that a different balance is achieved over the total range of values with the density of the low value pixels increased thus allowing laser output power to be reduced and create improved detail within the high value pixel areas of the work.
I hope this change may be useful to others using the plugin and the latest version of the .dll and it’s associated .pdf document can be downloaded from here;
Engraving.dll http://www.cooperman.talktalk.net/Engraving.dllEngraving.pdf http://www.cooperman.talktalk.net/Engraving.pdfTweakie.
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