the DCT is lossless; it just serves to separate the block information into lower-freqency components at the top left of the block, gradient to high-freq components at the bottom right of the block. The artifacts come from a lossy process where they divide the matrix, element-wise, by a matrix with ones in most places but higher and higher numbers as you go toward the bottom right. The end result is, you throw away partial information on your higher frequencies, in a pattern that the JPEG committee's research decided people can't see. Of course, you can further raise the factors from there, which most people do, which is why too many images show the blocking.
Incidentally, the image is further compressed by
converting the block to a linear array of data by reading in a zig-zag pattern from the top left
using (lossless) run-length encoding on that bit stream (or on the data as bytes or words, not too sure on this point)
compressing THAT output with a (lossless) entropy coding; I believe it's the huffman family of algorithms.
I don't have the details you do on who designed this plane, but I've been to a Ruslan (AN-124) factory -- got a tour, watched several being built, watched a completed one being towed out of the main building to a hangar.
All this was in Ul'Yanovsk... Russia.
(I also snapped some pictures, against their request, but I never sold them to the CIA, so I'm not a spy, right?)
There's also a reason a lot of people don't like math... any given equation looks to them about as complex as an arbitrary perl puke^H^H^H^Hscript looks to us.
In the short-term, yes, all you are doing is moving the pollution and cost elsewhere. The thing is, your car is now working off commodity electricity, and doesn't care how you generate it -- this prepares us for the (Real Soon Now) shift to alternate sources of electricity, whether it be the guy's solar cells on his roof, central California's windmills, Southern California's reactors, or China's pebble beds. IMHO, anything that reduces millions of engines' immediate reliance on fossil fuels is a Good Thing.
One project I've been tempted several times to join, but never quite got the impetus, is the HAL (hyperspatial analog to language) language data structures.
Basically, HAL stores a corpus of text with n distinct words as an n-dimensional array encoding the frequency of co-occurence of various words. This doesn't sound like much, but the results they obtain with it are amazing. Just from scanning a set of writings, they can tell the author's:
* Age
* Gender
* Education Level
* A few other things I can't remember off the top of my head...
Also, HAL gives some great results on word correlations -- including some "duh" relationships and some "wtf?!? oh, right, that DOES make sense..." ones.
Best of all, the server for HAL's web page is called locutus...
If only I could adapt the 'caterpillar' drive described in The Hunt For Red October to cool my system... totally silent, but requires a nuclear reactor for power and separate cooling for the electromagnets...
(details stolen from Knick)
Sure, have everyone switch to Linux. Now. Interfaces will become more refined, device drivers will be written, and Applications will be ported. (and better ones written fresh!) Average Joe and his grandma will both pay for applications that do what they want; Linux to them won't be about libre or gratis, it's about better.
Why do I have this confidence about this feedback cycle working out just fine? I've been using OS X since just after the beta, when it was slow, with bad interfaces, little (third-party) hardware support, and very few applications had been ported over yet. Of course, this was alright, because most could be run in the emulation that was included with the system until replacements had been written. Any of this sound familiar?
How come they get the 300-ft RFID when my work ID has to be held less than an inch from the reader? some days I have to actually take it out of my wallet to scan!
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What did the walrus say to the penguin? "No soap, radio."
You messed up the punchline...
Incidentally, the image is further compressed by
someone with more creativity than me make a One Ring poem out of this... "One daemon to launch them" etc...
So this is something I've often wondered about... who do big companies hire to do cost-benefit analyses, and how do they decide how much to pay them?
I don't have the details you do on who designed this plane, but I've been to a Ruslan (AN-124) factory -- got a tour, watched several being built, watched a completed one being towed out of the main building to a hangar.
All this was in Ul'Yanovsk... Russia.
(I also snapped some pictures, against their request, but I never sold them to the CIA, so I'm not a spy, right?)
There's also a reason a lot of people don't like math... any given equation looks to them about as complex as an arbitrary perl puke^H^H^H^Hscript looks to us.
In the short-term, yes, all you are doing is moving the pollution and cost elsewhere. The thing is, your car is now working off commodity electricity, and doesn't care how you generate it -- this prepares us for the (Real Soon Now) shift to alternate sources of electricity, whether it be the guy's solar cells on his roof, central California's windmills, Southern California's reactors, or China's pebble beds. IMHO, anything that reduces millions of engines' immediate reliance on fossil fuels is a Good Thing.
You might want to turn off your sig when making comments like that...
One project I've been tempted several times to join, but never quite got the impetus, is the HAL (hyperspatial analog to language) language data structures.
Basically, HAL stores a corpus of text with n distinct words as an n-dimensional array encoding the frequency of co-occurence of various words. This doesn't sound like much, but the results they obtain with it are amazing. Just from scanning a set of writings, they can tell the author's:
* Age
* Gender
* Education Level
* A few other things I can't remember off the top of my head...
Also, HAL gives some great results on word correlations -- including some "duh" relationships and some "wtf?!? oh, right, that DOES make sense..." ones.
Best of all, the server for HAL's web page is called locutus...
Now when you say "patently" obvious, do you mean as in Intellectual Property or Leather Shoes?
If only I could adapt the 'caterpillar' drive described in The Hunt For Red October to cool my system... totally silent, but requires a nuclear reactor for power and separate cooling for the electromagnets... (details stolen from Knick)
And here in Soviet Russia....
.sigged
I can't believe nobody's invoked Godwin's Law on this yet...
Sure, have everyone switch to Linux. Now. Interfaces will become more refined, device drivers will be written, and Applications will be ported. (and better ones written fresh!) Average Joe and his grandma will both pay for applications that do what they want; Linux to them won't be about libre or gratis, it's about better.
Why do I have this confidence about this feedback cycle working out just fine? I've been using OS X since just after the beta, when it was slow, with bad interfaces, little (third-party) hardware support, and very few applications had been ported over yet. Of course, this was alright, because most could be run in the emulation that was included with the system until replacements had been written. Any of this sound familiar?
How come they get the 300-ft RFID when my work ID has to be held less than an inch from the reader? some days I have to actually take it out of my wallet to scan!