Region Split and Merge

[@hafizsaifullah2529]

you have said that after merging, both previous regions are now one region. But after that you compare both of previous regions separately with their neighbor regions. How it is possible as considering them as single, but dealing them as separate...

[@pratikian]

You are right that is a mistake that I have done. Once the region is merged you should compare it with the whole region. Thank you so much for pointing it out.

[@lancelofjohn6995]

@@pratikian Hello ,does it mean if we compare the fourth part ,we have to use the combination of first, second ,third part as a whole region. Then we use the max ,min value in whole region composed of the first, second, third part to compare with the fourth part to get the difference between whole region and the fourth part. In the end by using threshold to identify if the fourth region belongs to whole region composed of the first, second, third part.

[@GateHalder]

still the answer is same no need to be angry

[@Udta_Parinda.]

After two hours i have my exam and you saved me!!!! Thanks a lot!!!!

[@pratikian]

Most welcome ... 😊👍 and all the very best ..👍

[@imanesamiry1114]

Thanks a lot. For this method, we also choose a number that is in the middle of the range, here the range is 0 to 7, so we can choose 3 or 4? because if we choose the maximum and minimum from a different region than the one you've chosen, we may get a different threshold!

[@RaunakGupta-t2v]

nice broo

[@josemiranda2340]

Que maquina, ojala mi profesor lo hubiese explicado así

[@pratikian]

muchas gracias

[@gangadharshaktiman8606]

Pratik plz solve an example of opening and closing where the seed element in the structural element has zero

[@pratikian]

I have solved the dilation and erosion examples with the structuring elements having seed points zero the same concept is to be applied for opening and closing

[@d47-mithilnaik16]

Ye Quad tree representation kya hota hai ???Kisiko pata hai kya ??

[@husseinsaad9348]

Thank you!

[@JayaKumar-mw8nd]

Thanks bro very helpful

[@mithunchandrasaha403]

Nice Explanation.Sir

[@karthiksg2976]

Very good explanation

[@pratikian]

Thank you so much ..😊👍

[@lachulachus6623]

during merging if still there are regions which don't satisfy threshold condition no need to consider it during merging right???

[@pratikian]

Right

[@bhartjeet6705]

Nyc video 👍

[@pratikian]

+Bhart Jeet thank you ..😊

[@pratikian]

+Bhart Jeet thank you ..😊

[@meriemmeriem6254]

thankx 👏

[@atmaprakashsingh8281]

Please post some video on grey level dialation n erosion using example.

[@pratikian]

+ATMA PRAKASH SINGH kzbin.info/www/bejne/gJTPlYFto7qcsNE Start watching from 39.21 mins

[@atmaprakashsingh8281]

A=(1,4,5,7,2,1,8,9,2,1,6) n structuring element B=(1,4,6) then how to find out A dilation B .please provide the solution.

[@lachulachus6623]

if a region have 4 pixels and it won't satisfy threshold condition during region splitting what is the further procedure used??

[@pratikian]

So in practical cases it is rare to find such a case , either we can twig the threshold in such cases to get the required segmentation, also in some algorithms there is a limit to the splitting, say atleast some n pixels should be there in the segment.

[@chandbasha6608]

Hi is Region merge and split is same as STATISTICAL REGION MERGING if not please let me know

[@pratikian]

+chand basha they are 2 different things in statistical region merging we first select a threshold and directly start merging the neighbouring pixels ... Whereas in region split and merge we first split the images according to the threshold and then start merging

[@chandbasha6608]

Thanks Jain for your valuable inputs can u please explain it with an example.

[@pratikian]

@@chandbasha6608 a good example is given on wikipidia Check it out en.m.wikipedia.org/wiki/Statistical_region_merging

[@gangadharshaktiman8606]

Plzz give an example with image consisting of 1,0

[@gangadharshaktiman8606]

For region split and merge

[@pratikian]

for 1s and 0s the concept remains the same, only here the threshold is what you need to change, split the image into 4 parts if a region consists of all 1s or all 0s then leave it as it is if this is not the case split it further after all the splitting done you should have regions with only one or zeros in it, then merge all the adjecent regions which have 1 or 0 and you get your ans

[@gangadharshaktiman8606]

Thanks Pratik

[@pratikian]

most welcome

[@gadarimaheshwari6984]

How to took those numbers in order

[@pratikian]

Sorry, I didnt get your question

[@thetrainoflife8327]

Thank you bhai ❤

[@MISKATAKAMVENKATASAIHARSHITH]

Should the matrix be even matrix like 8,8 or 10,10 like wise

[@MISKATAKAMVENKATASAIHARSHITH]

Or it could be like any type of matrix

[@pratikian]

@@MISKATAKAMVENKATASAIHARSHITH if the matrix is odd then like say 11x11 then you could split into cells of 5 and 6

[@business-hy3lb]

If u take 2 regions for merging . U take max - min of one region with another . Forward and reverse . What if one condition satisfies and the other dosent ? Will it merge ?

[@pratikian]

There are very less chances that that will happen

[@vinayaksharma-ys3ip]

Thanks bro!!

[@shortsclip9557]

thanks worthfull watching

[@pratikian]

+shubham kumar thank you so much ..😊

[@pranavvenkatesan9712]

bro what if the image does not have equal dimention? like your image has 8x8 dimension what should we do if we have an image with 8x9?

[@pratikian]

Then you can consider unequal split Means a split of 4 and 5 for 8 by 9

[@pranavvenkatesan9712]

@@pratikian while merging, consider 3 regions'a,b,c' ; what if 'b' satisfies the threshold condition with 'a' but not with 'c'? should i consider b in the final region or not?

[@pratikian]

@@pranavvenkatesan9712 then a and b will merge to form 1 region and c becomes other region

[@pranavvenkatesan9712]

@@pratikian but c somehow merges with 'a' through other regions present in the image

[@pratikian]

@@pranavvenkatesan9712 then a b and c all will merge Remember merging only happens with the neighbouring regions Suppose A B C are 3 regions and threshold of a and c is same still because B is there in between merging wont happen

[@shif1365]

Thank you so much ...sir

[@priyalakshmi7064]

hello pratik, will you be able to check the code for splitmerge? Ain't able to implement it.I may send you a mail.

[@pratikian]

yea sure

[@shirishakaleru7442]

Thank you so much sir

[@saumyatiwari1003]

Thank you so much

[@supriya3209]

Thankyou so much !

[@pratikian]

Happy to help 😊

[@dkhongshei5798]

Thank u soo much

[@king-hc6vi]

What if the question contains only 0 and 1 then how to decide threshold

[@pratikian]

For a binary image you have only 2 values 0 and 1 the threshold can be 0.5 basically 0 is one part and 1 is other

[@king-hc6vi]

@@pratikian okay thnks

[@king-hc6vi]

@@pratikian so in this case 1's will not merge only.. Right??

[@pratikian]

@@king-hc6vi 1s will merge with only 1s and 0s will merge with only 0s

[@yadneshkhode3091]

Thankyou so much!!!!!!

[@pratikian]

Yadnesh Khode most welcome ...😊

[@elprofessor5741]

Real ID se aa Dinesh

[@siddharthmuralidharan623]

Very helpful

[@varunsharma6780]

Saved me today

[@pratikian]

+Varun Sharma happy to help ..😊

[@varunsharma6780]

@@pratikian Wanna collab? I also have a channel Learners Hub Having 2k subscribers

[@pratikian]

Colaborate as in how ?

[@varunsharma6780]

@@pratikian means we can place all videos on one channel.... We'll get more subscribers

[@mithlesharya4457]

please share code in matlab if you have

[@pratikian]

I have not made a Matlab code yet for this.. sorry i can help you with solving the errors if any

[@akshayalk5294]

thank u so much

[@pratikian]

Most welcome ..😊