What is the clustering algorithm in IMAQ AutoMThreshold VI?

Hello!
I am looking at the IMAQ AutoMThreshold (as well as the AutoBThreshold) and it does not tell us which algorithms are being used to set
the thresholds. Does anyone know the underlying details?
There are about 40 different techniques described in http://www.busim.ee.boun.edu.tr/~sankur/SankurFolder/Threshold_survey.pdf
which have various performance in different cases.
Thanks
D.

Before you can answer that question, you have to answer the question "what is the zip format"? It is a trick quesetion. There has never been such a thing. Zip was invented by the proverbial "some dude" (Phil Katz) who was a good at coding. The Zip format was never standardized so there is really no such thing as a zip file. There are many zip variants that use different forms of encryption.
The original zip encryption was a homemade algorithm written by Roger Shalfly. He has a PhD in math but this was an early attempt before the field was mature and people starting giving names to individual algorithms. Here is some information about the original zip encryption: http://cs.sjsu.edu/~stamp/crypto/PowerPoint_PDF/8_PKZIP.pdf
And here is a paper about one particular Zip variant: http://eprint.iacr.org/2004/078.pdf

Similar Messages

What is the encryption algorithm used in cwallet.sso

HI,
I am using Webcenter External Application feature to store psswords. I would like to know more information abut the default file based credential store
What is ecryption methodlogy used in cwallet.sso or anyther file used for creating a credetial store map in Webcenter
This information is needed for our client security team. I appreciate your help
Thanks
Sam

Before you can answer that question, you have to answer the question "what is the zip format"? It is a trick quesetion. There has never been such a thing. Zip was invented by the proverbial "some dude" (Phil Katz) who was a good at coding. The Zip format was never standardized so there is really no such thing as a zip file. There are many zip variants that use different forms of encryption.
The original zip encryption was a homemade algorithm written by Roger Shalfly. He has a PhD in math but this was an early attempt before the field was mature and people starting giving names to individual algorithms. Here is some information about the original zip encryption: http://cs.sjsu.edu/~stamp/crypto/PowerPoint_PDF/8_PKZIP.pdf
And here is a paper about one particular Zip variant: http://eprint.iacr.org/2004/078.pdf

What's the resample algorithm for ChannelPortSuite::PSChannelPortSuite- ReadScaledPixels()?

If I specify different Rect of source vs. desitnation in the scaling parameter.
How does ReadScaledPixels resample the image?
Is there a way to specify the resample algorithm like "nearest neighbor", so that I can still have some level of the integrity of the source image?
I saw that there's PIResampleProc callback available for doing the resampling, but can't we choose the algorithm in combine with the ReadScaledPixels call?
// Get the source document bounds
scaling.sourceRect.top = pChannel->bounds.top;
scaling.sourceRect.left = pChannel->bounds.left;
scaling.sourceRect.bottom = pChannel->bounds.bottom;
scaling.sourceRect.right = pChannel->bounds.right;
// Get the bounds of the proxy view in the dialog
scaling.destinationRect.top = 0;
scaling.destinationRect.left = 0;
scaling.destinationRect.bottom = pChannel->bounds.bottom/2;
scaling.destinationRect.right = pChannel->bounds.right/2;
pmd.depth = pChannel->depth;
pmd.rowBits = (scaling.destinationRect.right - scaling.destinationRect.left)
* pChannel->depth;
pmd.colBits = 8;
pmd.bitOffset=0;
VRect read_rect=scaling.destinationRect;
if (sPSChannelPortSuite->ReadScaledPixels(
pChannel->port,
&read_rect,
&scaling,
&pmd
int i = 0;

and until then the footage has to stay 600fps. Is this correct?
No. Motion blur is calculated from frame to frame at the actual playback speed. Anything else would look fake, anyway, though of course you may already ned to/ want to add some motion blur to some elements halfway through just to from the precision of higher framerates. Smoother curves and all that. So ultimately in which order you do it is till a matter of what gives you the best result, not so much a fixed "correct" order.
Mylenium

What are the clustering 'gotcha's' - Anyone got a list?

We plan to implement a very high load website using
ColdFusion enterprise. Before we start coding we'd like to know
what the various 'gotchas' are, unfortunately so far all we found
in the docs and various sites are 'quick mentions' of this and that
not working.
For example I'm aware of the applcations variables not
replicating, and the need to place all user-uploaded in a
centralized location accessible by all nodes of the cluster. But
there are many thing we don't know, for example we plan to
load-balance the webservers using NLB at first then cytrix
netscaler boxes in the longer term - and someone posted on the
documentation comments that this would break session replication.
Is that true?
My question, are there any other 'gotchas' that will affect
the way we write code? Anyone got a list?
Any help or pointer would be greatly appreciated :D

nagromme wrote:
I didn't know OS X could do such a thing!
I didn't know about it either but, apparently, the technique is common:
http://en.wikipedia.org/wiki/Hard_link
"If one of the links is removed with the POSIX unlink function (for example, with the UNIX rm command), then the data are still accessible through any other link that remains. If all of the links are removed and no process has the file open, then the space occupied by the data is freed, allowing it to be reused in the future. This semantic allows for deleting open files without affecting the process that uses them. This technique is commonly used to ensure that temporary files are deleted automatically on program termination, including the case of abnormal termination."

What are the clusterable services in Sun App server 8.1?

My guess is stateful session beans and entity beans.
what about JMS and timer services?
thanks,
Nasrin

Did you download AS8.1 agent under http://www.sun.com/download/products.xml?id=4266924d?
If you can unjar am_as81_agent_2_1.jar after installing the J2EE agent, you will find AgentRealm.class under com.sun.amagent.as.realm.
Please also note that page 161 of J2EE agent guide shows how to disable AgentRealm to better fit your agent policy mode. Check it out http://docs-pdf.sun.com/816-6884-10/816-6884-10.pdf
Jerry

What is the complexity of "Elliptic curve Pinstov Vanstone signature" algorithm?

what is the complexity of "Elliptic curve Pinstov Vanstone signature" algorithm?

Why do you ask? And why do you ask us?

What is the input "key" in the IMAQ Write Custom Data palette?

Hello!
I am not able to use correctly the IMAQ Write Custom Data palette because I do not know what is the input "key".
Does anyone know its meaning?
Sincerely,
Fábio Machado Cavalcanti
Canada-Brazil Science Without Borders Student
Lakehead University, Thunder Bay, Ontario, Canada
Federal University of Pernambuco (UFPE), Recife, PE, Brazil
Undergraduate Student in Chemical Engineering

Thank you for replying Ninad Regundwar!
I agree with this. I have already read this information in the LabView Help.
However, I would like to know what is the "key" specifically. I know that it is a string.
I have written a code to add some acquisition features in a PNG Image File. For this, I have used the following palettes: IMAQ Write File 2 - PNG with Vision Info and IMAQ Write Custom Data.
Afterwards, I have written another code to read the acquisition features from this PNG Image File. For this one, I have used the following palettes: IMAQ Read Image and Vision Information and IMAQ Read Custom Data.
But, when I am reading the acquisition features, an error message appears: "ERROR -1074395723 occurred at IMAQ Read Custom Data - IMAQ Vision: The key you specified cannot be found in the image"
I do not know what I have to put in the input "key". So, I have been trying different values for it: "data", "hello", "13", "56", etc. But, none of these has worked and the same message has appeared.
Does someone know what I have to put in the input "key"? Does someone have an example that shows how to use the palettes: "IMAQ Write Custom Data" and "IMAQ Read Custom Data" correctly?
Sincerely,
Fábio Machado Cavalcanti
Canada-Brazil Science Without Borders Student
Lakehead University, Thunder Bay, Ontario, Canada
Federal University of Pernambuco (UFPE), Recife, PE, Brazil
Undergraduate Student in Chemical Engineering

What is the difference this 2 sample pictures? Use IMAQ Detect Circles function to detect the GREEN button.

Hi All,
Please refer to the attached 2 pictures, they are the similar, just the size is defferent. (pass.PNG, 5478 pass.PNG).
But now i try to use IMAQ Detect Circles to catch the GREEN button. For pass.PNG, it works fine, but for another sample, it is always fail to detect this button.
I also try to change the Curve Parameters and score as input, but still failed. Another way, i also try to use IMAQ find circles function, but the result is worse than IMAQ Detect Circles, so give up.
The code is detect the circles.png, copy it to block diagram enough.
So, what is the root cause? Thanks for help.
Colin
LV7.1/8.2/8.2.1/8.5/8.6/9.0/2010/2013; testing system development
Please Mark the solution as accepted if your problem is solved and donate kudoes
Home--www.colinzhang.net
Solved!
Go to Solution.
Attachments:
pass.PNG ‏38 KB
5478 pass.PNG ‏35 KB
detect the circles.png ‏112 KB

Hi colinzhang,
The curve extraction mode if change it to Uniform mode, u can get the result.
-Suggestion, if you want to use the entire image region as ROI no need to get the image size, getting rectangle and converting it to ROI descriptor. (I think this is unnecessary)
-Be careful with color plane extraction, u're using by default which is Red plane. In this example it's fine. but make sure u know which plane u're extracting.
-please find vi saved in 2010 version.
Thanks
uday,
Please Mark the solution as accepted if your problem is solved and help author by clicking on kudoes
Certified LabVIEW Associate Developer (CLAD) Using LV13
Attachments:
Detect_Circles.vi ‏53 KB

What are the steps to setup an HTTP Session replication clustering in oc4j9

what are the steps to setup an HTTP Session replication clustering in oc4j9.0.5

Are you sure you have the correct version number for OC4J? Is this a standalone OC4J instance, if it then the steps involved are different from the full stack. Please check the Higher Availibility guide in the documentation on OTN.
Deepak

What is the algorithm for this?

if I have a string 000111 (or any amount of zeros and ones), what is the algorithm for me to get all possible combinations? (001011, 001101, ...)

Odd but the following code does not yeild the results you list in your post. Maybe you have a mistake? Or am I missing something?
class test
public int[] getC(int[] c, int n)
          int m= c.length;
          for (int i= m; i-- > 0;)
               if (++c[i] <= n-(m-i))
                    while (++i < m)
                         c= c[i-1]+1;
                    return c;
          return null;
     public static void main(String[] args)
          test t = new test();
          int[] input = {0,1};
          int n = 4;
          int[] res = t.getC(input, n);
          for (int i = 0; i < res.length; i++)
               System.out.println(res[i]);

What is the most suitable image format for processing with imaq?

Hello.
What is the most
suitable image format for processing with imaq?
I want to capture an image of a usb webcam, store and
then process it with imaq. I need to know what format to save the
captured image can then load and process it with imaq vision.
Thanks

The only criteria is: don't use JPEG for anything scientific! The compression involved with saving JPEGs means you always lose information. I tend to prefer PNG - it's compressed, but non-lossy, and also widely supported. TIFF is fine as well, but I don't think has any advantages over PNG for this application. JPEG2000 can give good non-lossy compression I think is slower to read/write than PNG.

What is the benefit if we add coherence in soa clustering?

Hi,
What is the benefit if we implement coherence in SOA clustering?
For eg:
Consider 2 applications like below:
1. SOA clustering with coherence implemented
2. SOA clustering without coherence implemented.
The features like high availability, load balancing, performance improvement etc., can be achieved with SOA clustering alone. But if coherence is used in SOA clustered envt, what is the value add that coherence is providing?
Your inputs are highly appreciated.
Regards,
Sree

Sree,
Coherence caching is embedded in SOA 11g. Product uses it internally for various purpose (deployment distribution, cluster communication etc.). What do you mean by SOA clustering without coherence implemented?
Regards,
Anuj

What is the data format of the image buffer from a NI-IMAQ 1394 acquisition?

I am acquiring a framebuffer which I desire to process using my own code.
The configuration is:
Set ATTR_VIDEO_FORMAT 1
Set ATTR_VIDEO_MODE 3
Results in
Get ATTR_IMAGE_WIDTH == 1024
Get ATTR_IMAGE_HEIGHT == 768
Get ATTR_IMAGE_REP == COLORID_YUV422
Get ATTR_BYTES_PER_PIXEL == 4
What is the data layout of this framebuffer?

Robert,
I'm not sure if I understand exactly what you are asking here, but you can use the Get Buffer function call to access the image data and it will coorespond to the image type that you acquired (8 bit integer for monochrome and 32 bit for RGB).
Let me know if this doesn't answer your question.
Regards,
Andy Bell
Application Engineer
National Instruments

Do these two tools use the same algorithm?

Do Oracle In-Memory Database(TimesTen) and Oracle Coherence use the same algorithm?
Both of them are in-memory databases?
If not, what is the difference?
Edited by: qck on Aug 11, 2009 8:17 PM

No, they are different tools and they use different algorithm.
Oracle TimesTen In-Memory Database is a memory-resident relational database. Deployed in the application tier as an
embedded database, Oracle TimesTen In-Memory Database operates on databases that fit entirely in physical memory using standard SQL interfaces.
Oracle TimesTen In-Memory
Database libraries are also embedded within applications, eliminating context switching and unnecessary network operations, further improving performance.
Oracle TimesTen In-Memory Database (TimesTen) is designed with the knowledge that data resides in main memory and can take more direct routes to
data, reducing the length of the code path and simplifying algorithms and structure.
Oracle Coherence is a JCache-compliant in-memory distributed data grid solution for clustered applications and application servers. Organizations can predictably scale mission-critical applications by using Oracle Coherence to provide fast and reliable access to frequently used data. Oracle Coherence enables customers to push data closer to the application for faster access and greater resource utilization. By automatically and dynamically partitioning data in memory across multiple servers, Oracle Coherence enables continuous data availability and transactional integrity, even in the event of a server failure. Oracle Coherence is a shared infrastructure that combines data locality with local processing power to perform real-time data analysis, in-memory grid computations, and parallel transaction and event processing.
In my opinion, Oracle Coherence is more powerful. It mostly co-located on multiple server's memories. It is not only for databases (by integrating with The Hibernate or TopLink) but also for other applications.
Edited by: jetq on Aug 11, 2009 11:20 PM

What is the difference between Windows and Mac formating?

Hello guys!
My question is in subject, just wondering what is real difference and what kind of restrictions in usability i could expect?
Thanks,
Ivan

Mac OS X uses a file system that it inherited from Mac OS called HFS Plus. HFS Plus is a metadata-rich and case preserving file system. Due to the Unix roots of Mac OS X, Unix permissions were added to HFS Plus. Later versions of HFS Plus added a journal to prevent corruption of the file system structure and introduced a number of optimizations to the allocation algorithms in an attempt to defragment files automatically without requiring an external defragmenter.
Filenames can be up to 255 characters. HFS Plus uses Unicode to store filenames. On Mac OS X, the filetype can come from the Type code stored in file's metadata or the filename.
HFS Plus has three kinds of links: Hard links, Symbolic links and Aliases. Aliases are designed to maintain a link to their original file even if they are moved or renamed.
FAT32
In order to overcome the volume size limit of FAT16, while still allowing DOS real-mode code to handle the format without unnecessarily reducing the available conventional memory, Microsoft decided to implement a newer generation of FAT, known as FAT32, with cluster counts held in a 32-bit field, of which 28 bits are currently used.
In theory, this should support a total of approximately 268,435,438 (< 228) clusters, allowing for drive sizes in the range of 2 terabytes. However, due to limitations in Microsoft's scandisk utility, the FAT is not allowed to grow beyond 4,177,920 (< 222) clusters, placing the volume limit at 124.55 gigabytes, unless "scandisk" is not needed [3].
FAT32 was introduced with Windows 95 OSR2, although reformatting was needed to use it, and DriveSpace 3 (the version that came with Windows 95 OSR2 and Windows 98) never supported it. Windows 98 introduced a utility to convert existing hard disks from FAT16 to FAT32 without loss of data. In the NT line, support for FAT32 arrived in Windows 2000.
Windows 2000 and Windows XP can read and write to FAT32 filesystems of any size, but the format program on these platforms can only create FAT32 filesystems up to 32 GB. Thompson and Thompson (2003) write[4] that "Bizarrely, Microsoft states that this behavior is by design." Microsoft's knowledge base article 184006[3] indeed confirms the limitation and the by design statement, but gives no rationale or explanation. Peter Norton's opinion[5] is that "Microsoft has intentionally crippled the FAT32 file system."
The maximum possible size for a file on a FAT32 volume is 4 GiB minus 1 B (232-1 bytes). For most users, this has become the most nagging limit of FAT32 as of 2005, since video capture and editing applications can easily exceed this limit, as can the system swap file.
(From wikipedia)

What is the clustering algorithm in IMAQ AutoMThreshold VI?

Similar Messages

Maybe you are looking for