<story><title>Image unshredding using a TSP solver</title><url>https://github.com/robinhouston/image-unshredding</url></story><parent_chain><item><author>ampdepolymerase</author><text>Current office shredders are almost all capable of double shredding but considering how easy it is to reverse by OP&amp;#x27;s project, it may be necessary to implement further measures for document destruction.&lt;p&gt;A laser or enzymic based method could work but neither are particularly office-friendly.</text></item><item><author>aliasEli</author><text>This might even have an application for real documents. There are police cases where some suspects have tried to destroy evidence. Manually reconstructing the original takes a lot of effort. I expect that the CIA and NSA already have software for it, but I have never heard of it being used in a police case.</text></item></parent_chain><comment><author>ChrisMarshallNY</author><text>I used to work for a defense contractor, in the mid-1980s.&lt;p&gt;Once a week, this big-ass tandem truck would park outside the entrance, and the janitors would carry out boxes of papers, under armed guard.&lt;p&gt;The truck had a huge shredder (crosscut), and also a big kiln.&lt;p&gt;Once the paper was shredded, it was burned, and the ashes were shredded, just to be sure.&lt;p&gt;Then, the truck would take the ashes away; never to be seen again.</text></comment>
<story><title>Image unshredding using a TSP solver</title><url>https://github.com/robinhouston/image-unshredding</url></story><parent_chain><item><author>ampdepolymerase</author><text>Current office shredders are almost all capable of double shredding but considering how easy it is to reverse by OP&amp;#x27;s project, it may be necessary to implement further measures for document destruction.&lt;p&gt;A laser or enzymic based method could work but neither are particularly office-friendly.</text></item><item><author>aliasEli</author><text>This might even have an application for real documents. There are police cases where some suspects have tried to destroy evidence. Manually reconstructing the original takes a lot of effort. I expect that the CIA and NSA already have software for it, but I have never heard of it being used in a police case.</text></item></parent_chain><comment><author>jhayward</author><text>OP&amp;#x27;s method relies on the permutation of elements in (columns or rows) to be in the same order for each (column or row).&lt;p&gt;If you&amp;#x27;re just handed a pile of confetti you don&amp;#x27;t have that same correspondence.</text></comment>