Multiple sequential pattern match in a HSDIO acquisition app

I am quite a newbie about HSDIO apps and I would like to implement a
start-triggered app via Pattern Match. I wonder if I could recognize a
sequence of pattern matches (various samples) in order to start a
generation.
I use a NI-6541 device.
Thanks a lot.

Hello Matt,
Well, I'm sorry for the fact of being confusing. I'll try to clarify:
> ... Are you saying that you want to acquire on one port and then
> generate data on another port based on matching a pattern on the
> acquisition? ...
Yes, this is what I want to do. Also, sample clock is a external
signal (20MHz) connected to 'STROBE' pin. Generation and acquisition
sessions both use the same sample clock. Acquisition port has 2 lines/
inputs (dio28, dio29) and generation one has 28 outputs
(dio0..dio27).
Well, I have to do the following process (let's cross fingers):
1. When one '0' is detected in dio28 line, then device must wait until
dio28 is '1' and dio29 is '1'. There's no generation between these
events.
2. After that, a generation of a certain waveform is performed at
once, up to a certain number of samples in lines <dio0..dio27>. then,
dio29 is '0'.
3. Finally, pseudocoded: 'wait until dio28=1 and dio29=1. Then, go to
step 2 with another waveform parttern.' Device ends when 288 diferent
waveforms are written.
> ... I also wanted to know what version of the NI-6541 you are using? PCI or
> PXI? ...
PXI.
I hope to be more accurate.
Many Thanks In Advance

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Error-1074396120 Not an image, problem with IMAQ Learn multiple geometric patterns

Error-1074396120 Not an image, problem with IMAQ Learn multiple geometric patterns
Hi!
I've tried to modify the example of "multiple geometric patterns matching" , and just use two patterns, but when I run the VI this error appear and I doon't know how to solve it! , the error appears in the "IMAQ Learn multiple geometric patterns" block.
Running on:
- labview 32 bits
- windows 7 64 bits
- usb camera 2.0
Any sugestion would be helpful..... ! Regards
Attachments:
template_12.png ‏150 KB
template_11.png ‏123 KB
vision_multiple_pattern_matching.vi ‏127 KB

thanks all for your replies, the problem was on my template images, I had to give them information about the pattern matching, and I did it with NI Vision Template Editor, within Vision utilities, and I chose template with Feature Based.
Thank you again and Regards!

How do I set multiple pattern matching Vi's and make overlapping pattern matches to count as one?

Hello! I'm a student and I'm currently making a project using pattern matching.
My patterns are from chick foot/feet.
I'm created multiple pattern matching VI's to detect all the feet because I find it difficult/impossible to match all the feet with a single pattern/template.
However, when using multiple pattern matching VI's some pattern matches detect the same foot, hence overlapping.
So how can I make the overlaping pattern matches to be counted as one?
Thank you in advance

Thank you for replying Sir Zwired1.
I'm still a newbie in using LabVIEW so pardon me if I can't understand fully
The objective of my project is to detect all the feet through pattern matching and count the pattern matches made.
"Keep a 2D array of counts, initialized to zero and the same size as your array of possible locations, and increment the value every time you get a match. If multiple pattern matching attempts result in a match a given location in your count array might be "3" but all you care about is if the number is greater than zero."
I'm sorry, but how do you do this? BTW, I'm using vision assistant.

Multiple ROIs for Pattern matching

I want to define multiple regions of interest for pattern matching so that if one fails an alternative ROI might be used.The acquistion is continuous. I have a system that works with single ROI. I want to use the same with multiple ROI.

Are you looking for the following examples?
http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3E07356A4E034080020E74861&p_node=DZ52500&p_source=external
http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3E8E356A4E034080020E74861&p_node=DZ52505&p_source=external
Hope it helps.

Mod_security: Access denied with code 405. Pattern match "!(GET|HEAD|POST)

Hi all,
After Cloning facing an issue
mod_security: Access denied with code 405. Pattern match "!(GET|HEAD|POST)"
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EBS: 12.1.3
DB:11G
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Regards,
Raj.

Hi Hussein/Srini,
My OS details are as follows
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DB : 11.2.0.3
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Slowness of color pattern matching vi

Hi,
We're trying to implement a SLAM (simultaneous localization and mapping) algorithm in Labview based on kinect. In order to do so, the mapping robot should spot landmarks in real-time from the kinect image. We found the color pattern matching VI which does exactly what we need but the problem is that it's very slow (about 1.5 seconds for each image and total of 3 images each iteration). Is this the normal time for detecting landmarks in a kinect image? The robot can't map accurately when the iteration is so slow.
Thanks,
Rap Master
Attachments:
detect landmarks.vi ‏61 KB

Given that the pattern matching VI is an IMAQ (Image Acquisition) VI, this question will be best served by posting in our Machine Vision forums.
Blake C.
Applications Engineer
National Instruments
www.ni.com/support

Can I use differnet patterns for a "digital pattern match start trigger"

Hello,
Currently I would like use different patterns for a trigger the PCIe-6537 board to start capture data, for example, two patterns: 1101 and 1100 in digital IO lines line0:3, whenever one of this two pattern happens, start capture.
It seems like "digital pattern match" in DAQmx trigger can use one pattern only.
thanks!

Hi tt_ni,
Pattern I/O only allows the acquisition
based off of one pattern. This is a “limitation” of the hardware based on the
registers being set a certain way and monitoring a change from that. You could
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output of that external circuitry. The other option is to look at an FPGA
option.
Mark E.
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Pattern matching using Regular expression

Hi,
I am working on pattern matching using regular expression. I the table, I have 2 columns A and B
A has value 'A499BPAU4A32A386KBCZ4C13C41D20E'
B has value like '*CZ4*M11*7NQ+RDR+RSM-R9A-R9B'
the requirement is that I have to match the columns of B in A. If there is a value with * sign, this must be present in A like 'CZ4' should exit in string A.
The issue I am facing is that there are 2 values with * sign. The code works fine for first match (CZ4) but it does not look further as M11 does not exist in A.
I used the condition
AND instr(A,substr(REGEXP_SUBSTR(B, '*[^*]{3}'),2) ,1)=0
First of all, is this possible to match multiple patterns in one condition?
If yes, please suggest.
Thanks

user2544469 wrote:
Thanks a lot Frank. This query worked wonderful for the test data I have provided however I have some concerns:
- query doesnot include the column BOOK which is a mandatory check.Sorry, that was my mistake. It was a very easy mistake to make, since you posted sample data where it didn't matter. Instead of doing a cross-join between vn and got_must_have_cnt, do an inner join, using book. That means book will have to be in got_must_have_cnt, and all the sub-queries from which it descends. Look for comments that say "March 22".
If you want to treat '+' in test_cat.codes as '*', then the simplest thing is probably just to use REPLACE, so that when the table has '+', you use '*' instead.
WITH got_token_cnt AS
 SELECT cat
 , book -- Added March 22
 , REPLACE (codes, '+', '*') AS codes -- If desired. Changed March 22
 , LENGTH (codes) - LENGTH ( TRANSLATE ( codes
 , 'x*+-'
 , 'x'
 ) AS token_cnt
 FROM test_cat
, cntr AS
 SELECT LEVEL AS n
 FROM ( SELECT MAX (token_cnt) AS max_token_cnt
 FROM got_token_cnt
 CONNECT BY LEVEL <= max_token_cnt
, got_tokens AS
 SELECT t.cat
 , t.book -- Added March 22
 , REGEXP_SUBSTR ( t.codes
 , '[*+-]'
 , 1
 , c.n
 ) AS token_type
 , SUBSTR ( REGEXP_SUBSTR ( t.codes
 , '[*+-][^*+-]*'
 , 1
 , c.n
 , 2
 ) AS token
 FROM got_token_cnt t
 JOIN cntr c ON c.n <= t.token_cnt
, got_must_have_cnt AS
 SELECT cat, book -- Changed March 22
 , COUNT (CASE WHEN token_type = '*' THEN 1 END) AS must_have_cnt
 FROM got_tokens
 GROUP BY cat, book -- Changed March 22
SELECT mh.cat
, vn.vn_no
FROM got_must_have_cnt mh
JOIN vn ON mh.book = vn.book -- Changed March 22
LEFT OUTER JOIN got_tokens gt ON mh.cat = gt.cat
 AND INSTR (vn.codes, gt.token) > 1
GROUP BY mh.cat
, mh.must_have_cnt
, vn.vn_no
HAVING COUNT (CASE WHEN gt.token_type = '*' THEN 1 END) = mh.must_have_cnt
AND COUNT (CASE WHEN gt.token_type = '-' THEN 1 END) = 0
ORDER BY mh.cat
- query is very slow with 60000 records in vn table. Cost is somewhere around 36000.See these threads:
When your query takes too long ...
HOW TO: Post a SQL statement tuning request - template posting
Relational databases were designed to have (at most) one piece of information in each column. If you decide to have multiple items in the same column (as you have a variable number of tokens in the codes column), don't be surprised if that makes things slower and more complicated. Most of the query I posted, and perhaps most of the time needed, is jsut to normalize the data. If you stored the data in a narmalized form, perhaps something like got_tokens, then you wouldn't need the first 3 sub-queries that I posted.
Edited by: Frank Kulash on Mar 22, 2011 12:04 PM

New language feature: lazy local pattern matching

In the upcoming release of the Open Quark Framework, CAL gets a new language feature: lazy local pattern matching. The new local pattern match syntax allows one to bind one or more variables to the fields of a data constructor or a record in a single declaration inside a let block. For example: // data constructor patterns: public foo1 = let Prelude.Cons a b = ["foo"]; in a; public foo2 = let Prelude.Cons {head=a, tail=b} = ["foo"]; in a; // list cons patterns: public foo3 = let a:b = [3]; in a; // tuple patterns: public foo4 = let (a, b, c) = (b, c, 1 :: Prelude.Int); in abc; // record patterns: public foo5 = let = {a = "foo"}; in a; // non-polymorphic record pattern public foo6 = let {_ | a} = {a = "foo", b = "bar"}; in a; // polymorhpic record pattern Whereas a case expression such as (case expr of a:b -> ...) forces the evaluation of expr to weak-head normal form (WHNF), a similar pattern match declaration (let a:b = expr; in ...) does not force the evaluation of expr until one of a or b is evaluated. In this sense, we can regard this as a form of lazy pattern matching. Thus, let a:b = []; in 3.0; is okay and would not cause a pattern match failure, but the case expression case [] of a:b -> 3.0; would cause a pattern match failure. This laziness is useful in situations where unpacking via a case expression may result in an infinite loop. For example, the original definition of List.unzip3 looks like this: // Original implementation of List.unzip3 unzip3 :: [(a, b, c)] -> ([a], , [c]); public unzip3 !list = case list of [] -> ([], [], []); x : xs -> let ys = unzip3 xs; in case x of (x1, x2, x3) -> //do not do a "case" on the ys, since this makes unzip3 strictly evaluate the list! (x1 : field1 ys, x2 : field2 ys, x3 : field3 ys); ; ; The use of the accessor functions field1, field2 and field3 here is necessary, as the alternate implementation shown below would result in "unzip3 xs" to be evaluated to WHNF during the evaluation of "unzip3 (x:xs)". Thus if the input list is infinite, the function would never terminate. // Alternate (defective) implementation of List.unzip3 unzip3 :: [(a, b, c)] -> ([a], , [c]); public unzip3 !list = case list of [] -> ([], [], []); x : xs -> let ys = unzip3 xs; in case x of (x1, x2, x3) -> case ys of // the use of "case" here is inappropriate, as it causes "unzip3 xs" to be evaluated to WHNF (y1, y2, y3) -> (x1 : y1, x2 : y2, x3 : y3); ; ; ; With the new syntax, the original implementation can be expressed more nicely without changing its semantics: // New implementation of List.unzip3, revised to use the local pattern match syntax unzip3 :: [(a, b, c)] -> ([a], , [c]); public unzip3 !list = case list of [] -> ([], [], []); x : xs -> let (y1, y2, y3) = unzip3 xs; // using a tuple pattern to perform a lazy local pattern match in case x of (x1, x2, x3) -> (x1 : y1, x2 : y2, x3 : y3); ; ; It is important to note that in places where a case expression can be used (without having an unwanted change in the laziness of the expression being unpacked), it should be used instead of this local pattern match syntax. Things to note about the new syntax: - local type declarations on the pattern-bound variables are allowed, and these type declarations can have associated CALDoc comments. On the other hand, the actual local pattern match declaration itself cannot have a type declaration nor a CALDoc comment. - this syntax cannot be used for top-level definitions, only local definitions in let blocks - one cannot use patterns with multiple data constructors, e.g. let (Left|Right) = ...; is not allowed - one cannot specify a variable for the base record pattern, e.g. let {r | a, b} = ...; is not allowed, but this is okay: let {_ | a, b} = ...; - patterns without no variables are disallowed, e.g. let _ = ...; let [] = ...; let () = ...; let : = ...; let {_|#1} = ...; 

If you use just / it misinterprets it and it ruins
your " " tags for a string. I don't think so. '/' is not a special character for Java regex, nor for Java String.
The reason i used
literal is to try to force it to directly match,
originally i thought that was the reason it wasn't
working.That will be no problem because it enforces '.' to be treated as a dot, not as a regex 'any character'.
Message was edited by:
hiwa

How to accelerate the processing time of pattern match

How to accelerate the processing time of pattern match
If my camera acquire an image in 50ms, but when we analyze this image with pattern match, we need about 300ms. Except using queue to seprate acquisition
and analysis to different loops, there is another way to directly accelerate the processing time of pattern match ? Maybe compact rio with FPGA ?
But I saw a paper in NI web, there is no this function in c-rio ?
Any suggersion will be very apperciated ~
Ricky
Attachments:
aa.png ‏65 KB

Hello,
what matching algorithm are you using? You can reduce time using the Gaussian pyramids algorithm.You can fine tune the parameters using the advanced options.
What is your template size/image resolution?
I suppose using a computer with better performance would also work...
Best regards,
K
https://decibel.ni.com/content/blogs/kl3m3n
"Kudos: Users may give one another Kudos on the forums for posts that they found particularly helpful or insightful."

Multiple like patterns

what should be the SQL statement for multiple 'LIKE' patterns. I am giving the statement like this on a dummy 'EMP' table.
SELECT * FROM EMP WHERE ENAME LIKE 'JOHN%' OR ENAME LIKE 'PETER%'
Is the above statement correct for multipe patterns which is using 'OR' statement for pattern matching. Please help in solving my doubt as i need it resolved urgently.
Regards

Upper, lower case in Ename ????
Try :
SELECT * FROM EMP WHERE Upper( ENAME ) LIKE 'JOHN%' OR Upper( ENAME ) LIKE 'PETER%'

Gige + pattern matching

Hi all,
I am new to Labview image processing .
i need to achive pattern match. from that i need to find fiducail location . but here i am facing some problems like .
1. aquiring image is corrupted like black lines (i am using GigE camera 5MP 2/3" ) .
2. here i am doing pattern match by live grab method ( like continous aquring) . so that my CPU uasge is reachs nearlly 90 %
3. my task is to find fiducail using pattern match from that i need to assign ROI for main pattern (is it possible to snap image -> pattern match - > result)
i have attached my vi code and image ..
Attachments:
6.png ‏75 KB
PM_TEST.vi ‏121 KB

Hi please learn basics and then apply over...
1)What are the black lines in image? you didn't provide any screenshot/corrupted image.
-Are you getting images properly NI MAX?
-Did you allow jumbo packets ?
2)Please understand what is grab and snap by using built-in examples provides. And your cpu usage is not because of continuous acquisition.
-I cannot comment on the cpu usage now, but sure it's not because of gab.
-Use producer-consumer pattern to do parallel acquisition and processing.
3)Once you understand the difference between grab and snap, this you'll understand automatically.
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

How do I synchronize multiple *sequential* clips using audio waveforms in Premiere Pro CC?

I recorded a concert at my kids' school. I ended up with:
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The 5D Mark III can only record clips of up to 4GB in size, and clips 30 minutes in length. The clips broken up by the 4GB size limit are adjacent to each other, but the clips broken up by the 30-minute limit have a stop-pause-restart gap of a few second.
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Can Premiere Pro CC synchronize multiple sequential video clips using the audio waveform method?
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Thanks.

I'm an editing newbie but this was the very first task I needed to do, i.e. align multiple video clips with a single audio track. My setup is similar. I'm shooting with a Canon 70D, which breaks up video into 4gb clips, which are continuous and easy to align end to end. But the 70D like the 5D only shoots for 30 minutes continuously, so a second or two is lost hitting record again. My external audio was recorded continuously with a camera mounted Tascam (like a zoom) with a line in to the camera. So, in theory, the audio should be the same on the external audio and the audio associated with the video clips, which probably helps the software identify the identical wave forms.
I found that I could roughly align the video clips based on the audio wave forms and then "synchronize" the audio as shown in the video (Merge clips automatically using audio waveforms | Adobe Premiere Pro CC tutorials). I found that this aligned the audio perfectly but separated the video from its associated audio track. But it's easy to select the video and snap it back into alignment with its audio. While it would be nice to have everything merge automatically, using synchronize sequentially did not take much time.
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Trouble using a pattern match in the GO URL when the value starts with %

Hi guys,
We are trying to use a Go URL as follows:
[http://hostname.com:9704/analytics/saw.dll?Go&Path=/users/administrator/Test/TestReport&Action=Navigate&col1=TestReport.SUBJECT&op1=like&val1="%25D8D8%25"|http://hostname.com:9704/analytics/saw.dll?Go&Path=/users/administrator/Test/TestReport&Action=Navigate&col1=TestReport.SUBJECT&op1=like&val1="%25D8D8%25"]
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I'm heading to the Apple Store in Danbury CT tomorrow to test out a MacBook Pro. I'll happily post what I like and dislike here.
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How can I read a template and differentiate if it is a pattern matching template or a geometric matching template?

Hey all,
I would like to know how can I read a template´s information to know if it is a pattern macthing or a geometric matching template?
In my code, users provide templates and the algorithm must match them using pattern matching or geometric matching depending on the template.
At the moment I am doing it by including a P or a G in the name of the file, but I would like to avoid this and read the information from the file.
Any ideas?
Thanks in advance,
Esteban
Solved!
Go to Solution.

Hey Esteban,
you can use the VI "IMAQ Is Vision Info Present 2 VI" to reice the information:
IMAQ Is Vision Info Present 2 VI - NI Vision 2011 for LabVIEW Help - National Instruments
http://zone.ni.com/reference/en-XX/help/370281P-01/imaqvision/imaq_is_vision_info_present_2/
Take a look at the attached VI
Stephan
Attachments:
Determine Pattern type.zip ‏13 KB

Multiple sequential pattern match in a HSDIO acquisition app

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