Bean Wars - CAC

Discussion in 'US Coins Forum' started by robec, Oct 28, 2014.

  1. robec

    robec Junior Member

    Here are the Heritage photos.

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  3. -jeffB

    -jeffB Greshams LEO Supporter

    Sounds like a job for an automated system. ;)

    Yes, I know that computer grading was tried and failed in the past. I imagine part of the reason for that failure was that most people don't WANT a truly objective, well-defined, and static system -- they want some consideration of ineffable "eye appeal" that can't be evaluated by a computer, but "they know it when they see it".

    And I'm sure they do know it when they see it. The problem is, no two people will ever see it exactly the same way, and any one person is unlikely to see it exactly the same way over time.

    At least with a computerized system you'd have objectivity, testability, consistency, and well-defined criteria. But it looks like that's not what "the market" wants.
     
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  4. coindudeonebay

    coindudeonebay SMS Guru

    Getting a little Yoda on us aren't you!
     
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  5. robec

    robec Junior Member

    Well, I will admit I'm greedy in wanting all the toned Lincoln's I can find.
     
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  6. C G Memminger

    C G Memminger Active Member

    CAC makes sense if you catch a grade from PCGS or NGC which is on the upside of a steep, steep value break point. For example, if you catch a 65 on an 1891 Morgan from Philly (dealer bid jumps from $800 at 64 to $7350 at 65) or New Orleans (jump from $725 to $7100)..send it in. the green bean is like a reinsurance policy for whomever buys the coin from you. the benefit of getting the green bean is worth the expense of missing it.

    others. 1884-S Morgan jumps from $225 in AU to $7300 in 60; 1881-O jumps from $1650 in 64 to $25,000 in 65.

    Regrettably, I have found myself on the downside of several of these breakpoints....:(
     
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  7. robec

    robec Junior Member

    With coins such as this 1911 in BN there is no real breakpoint for grade. Color and toning drives the price.
     
  8. coindudeonebay

    coindudeonebay SMS Guru

    Which reminds me that I've been so busy and lazy that I haven't remembered to send your package!
     
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  9. Treashunt

    Treashunt The Other Frank

    Agreed, I have to laugh at a 'guess the grade' with opinions of 62 & 61, etc.

    No one here can tell the difference with a one point scale differential -- especially with pictures, and especially thru 2 X 2 holders.

    that explains many of my grade opinions.
     
  10. GDJMSP

    GDJMSP Numismatist Moderator


    Disagree. Grading is not a science, it is an art. It requires thinking, and computers cannot think. They can only perform mathematical functions that they are programmed to perform.

    And individuals can be consistent in grading, they can even be amazingly consistent. But not when the grading standards they are using are changed. Nor can they be consistent when they are not trained and taught properly. Nor can they be consistent when they are forced to follow and grade by inconsistent standards.

    Now I will readily agree with you that a grading system that actually works and is consistent, is not what the market wants. And I will readily agree with you that when it comes to eye appeal, that yes there will be some differences of opinion among certain individuals. But those differences would be very minor compared to what we have now.

    Why ? Well, what is eye appeal ? It's pretty simple really, eye appeal is nothing more than the sum of all other grading criteria. So if you have consistent and static grading standards then eye appeal, no matter who is judging it, can vary very little.
     
  11. geekpryde

    geekpryde Husband and Father Moderator

    Have you not heard and read about "machine learning"?

    Read up! You'll be amazed at what is being done in this area at University. Not saying that machines could or should grade coins anytime soon, but your are wrong about computers being limited to what they are programmed to do.
     
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  12. torontokuba

    torontokuba Thread Crapper & Hijacker, TP please.

    Yeah, I didn't want to tackle that one. You're the right man for this job. It's about time you explained something to @GDJMSP, the rest of us are getting tired. You can lead an old horse to water, but, you can't make him drink.:joyful:
     
  13. robec

    robec Junior Member

    I talked to JA today. When the coin was stickered approximately to years ago, JA and the CAC graders were on the fence in stickering early Lincoln's with this toning color and luster. He feels MS70 at some point may have been used to clean the coin, something he had noticed when removing PVC with MS70 in the past. They have now put in place a policy not to pass copper with this look.

    He also said the coin looked MS66 and had thoughts of even putting a gold bean on the slab, but in the end decided to stay with the new policy. He did offer to buy the coin or pay the difference between the two grades. I told him that I would have bought the coin if it was stickered or not,

    He ended up giving me credit for 5 of my 6 submissions that passed.
     
  14. jom

    jom Well-Known Member

    Spot on about the number of categories....I've felt that why for as long as I can remember. The fact of the matter is you can't have precision when the basic measurement system (ie grading) is inherently inaccurate and subjective. It's like trying to measure the length of a car with a ruler with 1/8 inch markings while the car is speeding by you at 80 MPH.

    However, the TPGs would rather you depend on them for grading so selling the idea of "precision" will bring them in more revenue.

    jom
     
  15. torontokuba

    torontokuba Thread Crapper & Hijacker, TP please.

    In other words, their invisible policy governing subjective opinions is also subjective? A transforming policy should eliminate consistency between past beaned submissions and future ones, much like any other TPG we may encounter inconsistency complaints about. What is their definition of this look or toning color or luster, the blue AT?

    Nice to see that the squeaky wheel gets credit for 5 out of 6 submissions.:D
     
  16. GDJMSP

    GDJMSP Numismatist Moderator

    Am I ? They are programmed to learn, so they can learn, based on mathematical function. But that is still a long, long, way from being able to think. And that is what is required.
     
  17. -jeffB

    -jeffB Greshams LEO Supporter

    I understand your view. Most people, maybe even most AI practitioners, would agree with it.

    Me, I'm not so sure. I'm starting to think that "thinking" isn't all it's cracked up to be -- that it's mostly illusion and perspective. But that's getting way off into philosophy, if not religion.

    When I look at the level of consistency that we're seeing from the TPGs, I have a gut feeling that the machine-vision and machine-learning folks could already put together a system that would yield more consistent results. It would require a good bit of work up-front, but could be reproduced and deployed pretty cheaply (as in "much less than the price difference between those 64 and 65 1881-O Morgans").

    But, again, that's not what the market wants.
     
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  18. geekpryde

    geekpryde Husband and Father Moderator


    Since Machine Learning is mostly based on inputs (one branch is), coin grading seems like a perfect test case for this technology to me. Basically, you show the machine up 100-1000 examples of each grade for each series (according to @GDJMSP of course :p). In some series, this wont be possible, but lets start with the easy ones. Some examples would be toned and not, attractive and not, high-end or low-end for the grade, etc. Basically a great variety for as many series in as many grades as possible, including problem coins of all kinds. You then let the machine use the inputs to create the necessary "mapping" of what each grade looks like, a fancy algorithm that human mind probably cant ever imagine or create, with all the variance that entails, and then you give it another 10,000 coins and see how a Machine grades vs a human. Think computer chess competitions in the 90's.

    This isn't really theoretical, this could be done now to see how consistent machines could grade. I bet, they would at the very least be more consistent than TPG. Of course as other have pointed out, watch out what you wish for. We very well might not like the results of machine grading at all!!!
     
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  19. torontokuba

    torontokuba Thread Crapper & Hijacker, TP please.

    It would be good to have a team of undisputed experts agree on the examples presented to the machine.

    Since facial recognition software incorporated skin texture into its analysis procedures, there is really no reason why coin grading should present any sort of challenge.

    Most people discuss and analyze coin grading in terms of specifics, details, consistency, etc. Sounds awful scientific when you start considering consistent wear patterns on high points and amounts of designs still remaining. Calling grading an art does not come close to reality. Why give it such an ambiguous distinction? How many sunflowers did Van Gogh paint and how many are consistent with the first painting? Do you really want someone who considers themselves an artist to grade your coins? Pompous and unrealistic sounding, if you ask me.
     
  20. GDJMSP

    GDJMSP Numismatist Moderator

    Now that Jeff, that is an entirely different thing. But then you could have a monkey throw darts at a dartboard with grades on it and the monkey could do a better job than the TPGs do today ;)

    Now that would be a bit difficult. Why ? Because all coins, unless they are freshly dipped or only minutes old are toned to at least some degree. And if you are telling the computer which ones are attractive and which are not, then all the computer will be able to do is return opinions based on what you told it, your taste in other words.

    Let me see if I can put it into perspective for you. There is a person, born blind, and it is your job to describe to him what the color orange looks like, and get him to understand it. Go ahead and try and do it.

    That is what it would be like trying to get a machine to understand the concepts. Oh, and by the way, understanding requires thinking. Something machines can't do.

    Same problem as above.

    Those fancy algorithms, they are written by human minds.
     
  21. GDJMSP

    GDJMSP Numismatist Moderator

    Well therein lies the problem because all of that, that is only part of grading.

    In your opinion. Problem is, every person who actually knows grading, would disagree with you.
     
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