Archived posting to the Leica Users Group, 2009/05/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The electrons liberated from the battery into the sensor (simplified version) are probably just dissipated as heat through the electrical components. Otherwise, you wouldn't need to worry about charging a battery or amp noise... By the way, I'm new here. :) Cheers Ming On May 21, 2009, at 8:49 PM, Vick Ko wrote: > Yes, these two answers, by Howard and Richard, are the two most > "realistic". > > First, there is the mechanistic answer, that the pixels are merely > the electro-magnetic storage states of the storage medium, and > deletion alters their state. This alteration requires energy > input, and you get into the operation and physics of the particular > storage media. And that alteration might only be the elimination > of the file definition (header) bytes, or might be the entire > overwriting of the whole pixel array to a "start state". > > Then, there is the "information philosophy" side, which Howard > talks about. Where did the information represented by that "state > of the set of pixels, which might be an image", go? Is is now > distributed into the minds and memories of all those who saw it? I > personally don't understand the hypothesis that "information is > never destroyed", but that is an indication of my lack of > understanding. > > > ...Vick > > Howard Ritter wrote: >> Congratulations, Dr Ted! That is actually a very subtle and >> incisive question. >> The answer is rooted in quantum mechanics, information theory, and >> the notion >> that information, like matter and energy, is never destroyed. >> There was a prolonged >> and passionate debate in the physics community on this question. >> It was feared >> initially that when matter falls into a black hole, its >> information content is lost, to >> the great consternation of many physicists. It seemed as egregious >> a violation of >> fundamental physics as a violation of the conservation of energy. >> But clever >> insights and analysis finally saved the day. Check out The Black >> Hole War by >> Leonard Susskind, or at least James Trefil's Washington Post >> review of the book at >> Amazon: >> >> http://www.amazon.com/Black-Hole-War-Stephen-Mechanics/dp/ >> 0316016411/ref=sr_1_1?ie=UTF8&s=books&qid=1242872534&sr=8-1 >> >> So wherever the pixels go, in some fashion their information is >> never lost to the >> universe?no matter how good your memory scrubber is! The question >> is, where >> do the pixels go?oh, but that's what you asked, isn't it? >> >> That's my circular explanation. >> >> ?howard >> >> On May 20, 2009, at 9:57 PM, Richard Man wrote: >> >>> It goes to the bit bucket in the heaven! >>> >>> The pixels are stored as a file in the media, so it goes wherever >>> files go >>> when you delete a file. In practical terms, under Windows, >>> normally the >>> files go to the Recycling Bin so you can rescue them if needed >>> unless you >>> empty the Recycling Bin. When that happens, the disk space used >>> by the file >>> may be used by the system for the other files, but at the system >>> level, the >>> file is stored in multiple locations and it's possible to recover >>> portion of >>> the file even if the system reclaims and file and uses the >>> storage space. >>> >>> There are methods to more permanently delete a file involving >>> actively >>> modifying all the data that the file. In the extreme case, one >>> could destroy >>> the drive by removing the platters and pound it into bits... >>> >>> Does this help? >>> >>> On Wed, May 20, 2009 at 6:42 PM, TED GRANT <tedgrant at shaw.ca> wrote: >>> >>>> I have just been asked a technical question and require an exact >>>> answer if >>>> possible. >>>> "WHERE DO THE PIXELS GO WHEN YOU DELETE A PICTURE?" >>>> Dr. ted >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> >> > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information THEIN Onn Ming *photohorologer ming at www.mingthein.com www.flickr.com/mingthein