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Extraction of bit planes in a grayscale image using MATLAB 

Dr. Rashi Agarwal
Подписаться 17 тыс.
Просмотров 157 тыс.
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The 5th session of the tutorials for introduction to image processing using Matlab where we extract the bitplanes of an image.

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21 авг 2024

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Комментарии : 78   
@geokurian4801
@geokurian4801 5 лет назад
ma'am, your class is very much useful. clear n clean.
@junaid5388
@junaid5388 7 лет назад
Thank you for sharing such a useful lecture. I have successfully employed the bit planes idea in my research. Respect from PAKISTAN.
@youngresearcher.
@youngresearcher. 11 лет назад
Thanks! You could run PCA on your template database to generate an orthogonal template basis
@ankurkumar7568
@ankurkumar7568 10 лет назад
Awesum explaination Rashi.. well done !!
@ahmedshareef7659
@ahmedshareef7659 4 года назад
u can use "bitget()" function to make that easy ^_^
@ericgoetz3282
@ericgoetz3282 9 лет назад
Great video. This was extremely helpful.
@youngresearcher.
@youngresearcher. 9 лет назад
glad to hear that!
@tariqkhanPathanKabuliwala
@tariqkhanPathanKabuliwala 6 лет назад
Great work, Thanks for sharing knowledge.
@blink1747
@blink1747 8 лет назад
Great Work Sista!
@juanmartinsancheznegrette9259
@juanmartinsancheznegrette9259 10 лет назад
Love the video and the accent is so cute.. thanks
@yashgokhale5238
@yashgokhale5238 8 лет назад
Excellent Explaination!! Thanks .
@nouraaliabuhlega4023
@nouraaliabuhlega4023 5 лет назад
you saved my day thank you so much
@shubhamdeshpande7436
@shubhamdeshpande7436 9 лет назад
brilliant work madam!!Thanx alot!!
@chandankumarjha3594
@chandankumarjha3594 8 лет назад
Yo have a very beautiful voice ma'am. Apologies but couldn't stop myself from putting this compliment. :)
@annapurnah8627
@annapurnah8627 8 лет назад
Thank you very much. very useful video
@anmaraljanabi7137
@anmaraljanabi7137 6 лет назад
many thanks for sharing
@rajamohdafiq480
@rajamohdafiq480 10 лет назад
thank you. this video help me
@njr00710
@njr00710 7 лет назад
how to find bit planes without using any standard matlab function?
@amirsawiopa
@amirsawiopa 7 лет назад
hello and thank you very much for making these videos they are great. i got a question, when you create the second plane what do you mean by shifting it one to the left, why did you divide by these numbers and not others? thank you in advance
@RameezAhmad1981
@RameezAhmad1981 8 лет назад
very good, helping idea
@shreyaovalekar6764
@shreyaovalekar6764 5 лет назад
Thank you ma'am
@ritikajain4393
@ritikajain4393 8 лет назад
Hello ma'am, thanks for ur videos. They r gr8..but I have a doubt. I am little confused when to typecast into double or uint8 as you mentioned that in order to display it, we should convert it back into uint8 but when you display all bit plane images from LSB to MSB, (like you used imshow(c0) ) you didn't convert them into uint8, but all operations were done in double type, so how it displays properly? Can you plz explain me?
@sweetnasa1
@sweetnasa1 8 лет назад
Nice observation. Please explain this. If you convert c0 to uint8 and display them, you will see black. Every extracted bit needs to be displayed in double and their combination 0..255 needs to be converted to uint8. Why is this so?
@narendrakumar-gz5or
@narendrakumar-gz5or 8 лет назад
imshow() for double expects values between 0 and 1 to display , which is mentioned in video at 0.53 sec , in second video there is data ranges for different data types : greyscale - unit 8 - (0,255) , double precision float -(0.0 to 0.1) so, Here c0 to c7 all are in between 0 and 1 with having variation at significant figures, so as imshow(c0) and etc displays respective figure with respect to their planes.so here no need to convert them to unit8 as to display images having values within 0 and 1 in DOUBLE datatype for imshow. but when combined all the pictures gives image of grey scale with datarange (0,255) which is in double but as imshow expects b'n 0 and 1 values in double, which cant get from grey scale, so it showing white image. so in order to get actual image, we are using unit8 data type.
@freesoul2677
@freesoul2677 7 лет назад
Thank you
@amrutvaishampayan1776
@amrutvaishampayan1776 9 лет назад
Ma'am, I watched ur DIP tutorial video 5, to convert image into bit plane. when we combined all the images then we need to convert it back to uint8 to show image, but when we showed c0, directly by imshow(c0); without conversion, please explain why?
@rishabhrastogi2880
@rishabhrastogi2880 9 лет назад
Ma'am, what if we don't use floor function? I've tried obtaining the same without it, i.e a7= mod((ad/128),2); for obtaining MSB and I am getting a more clear image than the previous one, the floor one. Can you please explain, what exactly the floor function does.
@josephj4273
@josephj4273 4 года назад
Why do we take 159 decimal value as a basis to our bit plane extractions?
@ankushgaurav8797
@ankushgaurav8797 8 лет назад
really useful
@SudhanshuSinghcs
@SudhanshuSinghcs 9 лет назад
Mam...Can you help me with Fingerprint recognition through matlab?
@issrahamad4699
@issrahamad4699 11 лет назад
thanks,so much
@kailashkolluru2398
@kailashkolluru2398 6 лет назад
How the conversion of gray level image to RGB is Possible as the gray level image only stores a matrix?
@TheMyopinion
@TheMyopinion 10 лет назад
Rashi, thanks for this video. I transferred the image to gray scale, but now I want to put a black rectangle on the eyes how to make that? Thanks
@musicnevres
@musicnevres 10 лет назад
great
@mengyuen9827
@mengyuen9827 7 лет назад
if i want to extract a picture with color from an image(e.g extract a butterfly from an image) , what method do you suggest?
@shubhammishra1294
@shubhammishra1294 7 лет назад
is cascade image detector ,gray thresh function,face classifier module features available on Matlab R2010a
@souravmishra5828
@souravmishra5828 9 лет назад
mam i tried to extract the bitplanes of a rgb image and i succeeded. but i have a doubt- why dont we convert the individual bit planes to uint8 before displaying. as told in the first part of the lecture why are we not getting an error by doing this. i tried to convert the bitplanes to uint8 before showing them in the figure but i got completely black images. can you tell why this happened although going by the first part of the lecture it should not have happened
@budapesteBR2012
@budapesteBR2012 6 лет назад
When i put more values to show the image like c7,c8,c9. The matlab says the image its too big. I dont get it.why tis occur??
@kartikkulkarni4007
@kartikkulkarni4007 7 лет назад
Ma'am how can I remove the odd number stored values from an array of pixels?
@saeedshayanmehr5271
@saeedshayanmehr5271 6 лет назад
hello .do you can learn image processing with out function?
@ammarkhalil4907
@ammarkhalil4907 6 лет назад
did you have any video on semi fragile watermarking?
@akashbhardwaj9114
@akashbhardwaj9114 7 лет назад
i couldn't get the use of double clearly.
@mayurshankar3181
@mayurshankar3181 5 лет назад
Do you have videos for image transmission ;since i have been working on li-fi image transmissiomn project
@vikrantkumar6400
@vikrantkumar6400 6 лет назад
Ma'am, Please Help me out of this error in matlab R2013a my image is stored in a and I am doing this operation down below >> b = a>78; >> imshow(b); -->>IT IS SHOWING ME THIS ERROR MESSAGE Error using imageDisplayValidateParams>validateCData (line 121) If input is logical (binary), it must be two-dimensional. Error in imageDisplayValidateParams (line 31) common_args.CData = validateCData(common_args.CData,image_type); Error in imageDisplayParseInputs (line 79) common_args = imageDisplayValidateParams(common_args); Error in imshow (line 220) [common_args,specific_args] = ...
@aartikasethi8719
@aartikasethi8719 10 лет назад
hello mam..i have a doubt can we pass images to a function for banarisation /enhancement...if so wat should be the arguments ??
@youngresearcher.
@youngresearcher. 10 лет назад
You can refer to my lectures on enhancement, You can read the image as a 2d array and pass it to functions which operate on arrays.
@aartikasethi8719
@aartikasethi8719 10 лет назад
mam are u talkin abt the one on bit plane extraction??
@youngresearcher.
@youngresearcher. 10 лет назад
no..the ones for histogram stretching n equalisation
@yaminatajafri5026
@yaminatajafri5026 10 лет назад
hello Aartika Sethi can i ask you ?
@amangupta8137
@amangupta8137 6 лет назад
Can be perform the same bit operation on rgb image...??
@mahigour522
@mahigour522 10 лет назад
awesome work... can anyone tell me how to convert this matlab code to c or c++ code ?? please
@rashmi1060
@rashmi1060 9 лет назад
very helpful video mam..thanks a tonn..i have a doubt how to get a green channel image from rgb image??
@youngresearcher.
@youngresearcher. 9 лет назад
ry456 read a color image into variable 'a'. use : g = a(:,:,2); to extract green component
@firdausanua3495
@firdausanua3495 7 лет назад
+rashi agrawal can you give your email i want to ask regarding my project
@amangupta8137
@amangupta8137 6 лет назад
what does this 2 means here mam...??
@florosass
@florosass 10 лет назад
Hello Rashi, I would like to contact you. I'm using the IPT to process information obtained from an infrared sensor but I'm having trouble with the visualization of the images. Regards. Florencia
@nehasheikh6698
@nehasheikh6698 7 лет назад
helo do u hav matlab code for extraction of group of images into single one
@Aao_Baat_Krenge
@Aao_Baat_Krenge 6 лет назад
can anyone tell which calculator she is using @ 7:45
@kamakshinaik7902
@kamakshinaik7902 8 лет назад
How can I do it for uint 16 dicom images
@snehashisjha4694
@snehashisjha4694 11 лет назад
thanks,that was really helpful.can you tell me how could i scan an image in different pattern? like by default matlab scans with raster pattern, but what if i want to scan it with spiral scan pattern or diagonal pattern or orthogonal pattern? it will be very helpful if u help me out with this. -- snehashis
@gayaniwijesinghe8656
@gayaniwijesinghe8656 8 лет назад
madam I watched ur all videos , I have doubt with bacteria image ,that need to apply three colors for the bacteria cells . pls help me
@vartikaagrawal6445
@vartikaagrawal6445 10 лет назад
mam can you pls help me out with one ques?? Suppose given an image of a human, how can we detect the position of its eye?
@youngresearcher.
@youngresearcher. 10 лет назад
u need to explore..u could use hough transform for circle detection for finding iris...add a similar size constraint and a symmetry constraint for a start...
@sweetnasa1
@sweetnasa1 8 лет назад
you can use some Machine Learning if you know them too. Or else simply use feature extraction or Circle Hough Transform for preliminary results.
@vartikaagrawal6445
@vartikaagrawal6445 10 лет назад
not able to find further vedios... pls share the link if some1 finds it
@youngresearcher.
@youngresearcher. 10 лет назад
ru-vid.com/group/PLEo-jHOqGNyUWoCSD3l3V-FjX9PnHvx5n
@vartikaagrawal6445
@vartikaagrawal6445 10 лет назад
rashi agrawal are there any further videos uploaded by you after these 20 videos ???
@youngresearcher.
@youngresearcher. 10 лет назад
vartika agrawal am in the process of making more as my course is progressing in the class
@jenthiyam3065
@jenthiyam3065 9 лет назад
sister ,it will be very kind of you if you upload videos about how to extract text from images.I got stuck here in extracting connected componet
@youngresearcher.
@youngresearcher. 9 лет назад
jen thiyam coming up soon
@yaminatajafri5026
@yaminatajafri5026 10 лет назад
thanks for your video . Mam rashi agrawal can i ask you please about enhancing arabic manuscripts??
@sunkaripranay5948
@sunkaripranay5948 7 лет назад
madam plz make a video on hot spot detection of IR imagery in MATLAB plz plz plz plz
@corlfranco9371
@corlfranco9371 9 лет назад
@conman2317
@conman2317 10 лет назад
I'm from india, and I take computer science: generic indian slime comment
@dr.mahanteshhanamasagar453
@dr.mahanteshhanamasagar453 10 лет назад
Hellow Madam, I am working on DIC. have taken set of images of specimens before and during loading. I am using Digital image correlation and tracking with matlab., by Eberl, C., Thompson, R. and Gianola, D www.mathworks.com/matlabcentral/leexchange/12413. Now I want to know, how to convert the deformations from pixels to mm.
@sudhansumtripathy
@sudhansumtripathy 8 лет назад
madam are you there , need some help and sent you a mail to your Gmail
@karanchandra9789
@karanchandra9789 5 лет назад
Mam your explanation is not good I'm not able to understand please go from basics
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