History re-photographed: This is a project to restore original greyscale images so that they contain a fair representation of the original colour content. A number of algorithms have been developed and some are continually being improved. The mathematical analysis and the necessary algorithms are the intellectual property of Robin Marshall and hence the colour component of the images here are copyright. Licences are avaiable for commercial use. Private use, beyond viewing the images on this web page is not permitted.To see a larger version, click on the image. All images are availabl at higher resolution, from 1600 pixels on the longest edge to over 3000 in some cases.
|William Sturgeonof Manchester was Mr Electricity during the first half of the 19th century and like Joule, did his research outside the infrastructure of a University simply because the only allowed Universities in England were the religious colleges of Oxford and Cambridge, which were not open to people like Joule and Sturgeon, even if they wanted to go there, which they didn't. This image of William Sturgeon presented a challenge because it was an engraving made off an oil painting which is now lost. Engravings were a hand version of half tone prints which rendered obsolete the engraving of steel plates by hand. This engraving required additional pre-algorithms which sometimes yield unexpected results like the grid lines used by the engraver to keep himself on the right track. I haven't finished with this one.|