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Thread Subject:
project help

Subject: project help

From: pavan kumar

Date: 16 Aug, 2010 09:57:04

Message: 1 of 9

Hi,
i am doing a project on image processing. in this connection i need to split the histogram in to subhistograms based on local maximums.To do this first the signs of first derivative of smoothed histogram are caluculated then we have to change +-+to +++ and -+- to --- then the local maximums are detected as the points where four successive negative signs are followed by eight successive positive signs. i need the code for this.
please help me
thanks in advance.

Subject: project help

From: TideMan

Date: 16 Aug, 2010 10:39:53

Message: 2 of 9

On Aug 16, 9:57 pm, "pavan kumar" <pavanece_...@yahoo.co.in> wrote:
> Hi,
> i am doing a project on image processing. in this connection i need to split the histogram in to subhistograms based on local maximums.To do this first the signs of first derivative of smoothed histogram are caluculated then we have to change +-+to +++ and -+- to --- then the local maximums are detected as the points where four successive negative signs are followed by eight successive positive signs. i need the code for this.
> please help me
> thanks in advance.

And I need the code to spin straw into gold.
please help me
thanks in advance

Subject: project help

From: Steven_Lord

Date: 16 Aug, 2010 13:17:05

Message: 3 of 9



"pavan kumar" <pavanece_424@yahoo.co.in> wrote in message
news:i4b21g$q41$1@fred.mathworks.com...
> Hi,
> i am doing a project on image processing. in this connection i need to
> split the histogram in to subhistograms based on local maximums.To do this
> first the signs of first derivative of smoothed histogram are caluculated
> then we have to change +-+to +++ and -+- to --- then the local maximums
> are detected as the points where four successive negative signs are
> followed by eight successive positive signs. i need the code for this.

Okay. Start writing and if you encounter a situation while writing your
code that has you stuck, show the code and what you've tried and ask a
SPECIFIC question about what's got you stuck and you may receive help.

--
Steve Lord
slord@mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ
To contact Technical Support use the Contact Us link on
http://www.mathworks.com

Subject: project help

From: Walter Roberson

Date: 16 Aug, 2010 15:39:00

Message: 4 of 9

TideMan wrote:
> On Aug 16, 9:57 pm, "pavan kumar" <pavanece_...@yahoo.co.in> wrote:
>> Hi,
>> i am doing a project on image processing. in this connection i need to split the histogram in to subhistograms based on local maximums.To do this first the signs of first derivative of smoothed histogram are caluculated then we have to change +-+to +++ and -+- to --- then the local maximums are detected as the points where four successive negative signs are followed by eight successive positive signs. i need the code for this.
>> please help me
>> thanks in advance.
>
> And I need the code to spin straw into gold.
> please help me
> thanks in advance

Is the straw from mountain meadow or from ocean tidal flats? Oats are
relatively salt resistant http://www.esajournals.org/doi/abs/10.2307/1934245
and the grass Cynodon dactylon has a fairly high uptake of gold
http://www.imwa.info/docs/imwa_2009%/IMWA2009_Gumbo_Mulugisi.pdf
Thus, with appropriate cross-breeding and crop selection, gold can be
extracted from sea water in tidal flats and retained in the straw, from
which the gold content could be extracted by sufficiently tight
spinning. The famous German academic, Wilhelm Grimm, established
conclusively that this was indeed done (at least in low volumes) in
historical times; cf his translation of Geschichtklitterung .

Subject: project help

From: TideMan

Date: 16 Aug, 2010 22:53:31

Message: 5 of 9

On Aug 17, 3:39 am, Walter Roberson <rober...@hushmail.com> wrote:
> TideMan wrote:
> > On Aug 16, 9:57 pm, "pavan kumar" <pavanece_...@yahoo.co.in> wrote:
> >> Hi,
> >> i am doing a project on image processing. in this connection i need to split the histogram in to subhistograms based on local maximums.To do this first the signs of first derivative of smoothed histogram are caluculated then we have to change +-+to +++ and -+- to --- then the local maximums are detected as the points where four successive negative signs are followed by eight successive positive signs. i need the code for this.
> >> please help me
> >> thanks in advance.
>
> > And I need the code to spin straw into gold.
> > please help me
> > thanks in advance
>
> Is the straw from mountain meadow or from ocean tidal flats? Oats are
> relatively salt resistanthttp://www.esajournals.org/doi/abs/10.2307/1934245
> and the grass Cynodon dactylon has a fairly high uptake of goldhttp://www.imwa.info/docs/imwa_2009%/IMWA2009_Gumbo_Mulugisi.pdf
> Thus, with appropriate cross-breeding and crop selection, gold can be
> extracted from sea water in tidal flats and retained in the straw, from
> which the gold content could be extracted by sufficiently tight
> spinning. The famous German academic, Wilhelm Grimm, established
> conclusively that this was indeed done (at least in low volumes) in
> historical times; cf his translation of Geschichtklitterung .

Yes, I've read the paper by Wilhelm Grimm and it is the algorithm
described there that I wish to implement in Matlab. The paper says
nothing about the type of straw required.
But you may be able to help me, Walter, with reference to the operator
Rumpelstiltskin who appears to have successfully executed the
algorithm. I can find no useful information on how he went about it.

Subject: project help

From: Walter Roberson

Date: 17 Aug, 2010 00:49:39

Message: 6 of 9

TideMan wrote:
> On Aug 17, 3:39 am, Walter Roberson <rober...@hushmail.com> wrote:

>> Thus, with appropriate cross-breeding and crop selection, gold can be
>> extracted from sea water in tidal flats and retained in the straw, from
>> which the gold content could be extracted by sufficiently tight
>> spinning.

> Yes, I've read the paper by Wilhelm Grimm and it is the algorithm
> described there that I wish to implement in Matlab. The paper says
> nothing about the type of straw required.
> But you may be able to help me, Walter, with reference to the operator
> Rumpelstiltskin who appears to have successfully executed the
> algorithm. I can find no useful information on how he went about it.

Atch, him. A sad case.

He got drunk(er) at one of the Underhill conferences a few decades ago
and someone mentioned that incident, and he pretty much blew his gasket.
Said that with all the contributions he's made to the Art over the
years, why does everyone only remember that?!

After a bunch of ranting about gnostic (or was it gnomic?) conspiracies,
he said that for that experiment he just followed standard laboratory
procedure -- that is, that he merely assigned a grad student to the
problem and didn't tell the student that it was supposed to be impossible.

When the ethics committee got after him afterwards for involving a human
subject without pre-authorization, he was forced to destroy the
details... they made him watch as the notes went up in flames just like
straw.

Subject: project help

From: Walter Roberson

Date: 18 Aug, 2010 21:24:04

Message: 7 of 9

Walter Roberson <roberson@hushmail.com> wrote in message <D0lao.60110$Zp1.28325@newsfe15.iad>...
> TideMan wrote:
> > On Aug 17, 3:39 am, Walter Roberson <rober...@hushmail.com> wrote:
>
> >> Thus, with appropriate cross-breeding and crop selection, gold can be
> >> extracted from sea water in tidal flats and retained in the straw, from
> >> which the gold content could be extracted by sufficiently tight
> >> spinning.
>
> > Yes, I've read the paper by Wilhelm Grimm and it is the algorithm
> > described there that I wish to implement in Matlab. The paper says
> > nothing about the type of straw required.

Thinking about it more, if you were to macerate the straw, preferably after giving some bacterial agent (e.g., termite symbiots) a chance to break down the cellulose in the straw, then you could follow that with some centrifuging to extract the gold atoms -- which would definitely qualify as "spinning straw into gold" in accordance with the project requirements. Alexander's steam wheel was well known at that time, and could have been enhanced with reduction gears in order to provide the necessary rotational velocity for the atomic separation. I should ask Great-Uncle Lusic how he did it in his time.

Subject: project help

From: TideMan

Date: 18 Aug, 2010 21:44:55

Message: 8 of 9

On Aug 19, 9:24 am, "Walter Roberson" <rober...@ibd.nrc-cnrc.gc.ca>
wrote:
> Walter Roberson <rober...@hushmail.com> wrote in message <D0lao.60110$Zp1.28...@newsfe15.iad>...
> > TideMan wrote:
> > > On Aug 17, 3:39 am, Walter Roberson <rober...@hushmail.com> wrote:
>
> > >> Thus, with appropriate cross-breeding and crop selection, gold can be
> > >> extracted from sea water in tidal flats and retained in the straw, from
> > >> which the gold content could be extracted by sufficiently tight
> > >> spinning.
>
> > > Yes, I've read the paper by Wilhelm Grimm and it is the algorithm
> > > described there that I wish to implement in Matlab.  The paper says
> > > nothing about the type of straw required.
>
> Thinking about it more, if you were to macerate the straw, preferably after giving some bacterial agent (e.g., termite symbiots) a chance to break down the cellulose in the straw, then you could follow that with some centrifuging to extract the gold atoms -- which would definitely qualify as "spinning straw into gold" in accordance with the project requirements. Alexander's steam wheel was well known at that time, and could have been enhanced with reduction gears in order to provide the necessary rotational velocity for the atomic separation.  I should ask Great-Uncle Lusic how he did it in his time.

Whoa!! Hold on there.........
Are you implying that the processing occurred during the time of
Wilhelm Grimm?
In the Introduction to his paper, did he not say "Once upon a
time ..."?
I have always interpreted this to mean some indeterminate period in
the past.
How can you be sure that Alexander's steam wheel was available?

Subject: project help

From: Walter Roberson

Date: 18 Aug, 2010 22:18:53

Message: 9 of 9

TideMan wrote:

> Whoa!! Hold on there.........
> Are you implying that the processing occurred during the time of
> Wilhelm Grimm?
> In the Introduction to his paper, did he not say "Once upon a
> time ..."?
> I have always interpreted this to mean some indeterminate period in
> the past.
> How can you be sure that Alexander's steam wheel was available?

Apologies, it was Hero of Alexandria, not Alexander. Hero's steam wheel was
invented circa AD 50. http://en.wikipedia.org/wiki/Hero_of_Alexandria

All extant editions of the paper report a spinning wheel, but spinning wheels
were not introduced until sometime in the 1200's, so Hero's steam wheel was
long long known. http://en.wikipedia.org/wiki/Spinning_wheel

Also, a minor semantic point: available translations of his paper start with
"Once there was a miller", not with "Once upon a time". My research suggests
that a struggling researcher might perhaps mis-translate the German
equivalents to English, but as there have been many peer reviews of the
translations of Wilhelm's papers, I would think that such an egregious mistake
would have been caught by now.

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