Matlab bwdist See Also. It is fairly clear to me that it can be done. bwdist function is basically a distance transform, and it can also return a map of distances from a certain point. Note that if you choose the generic MATLAB Host Computer target platform, imclose generates code that uses a precompiled, platform-specific shared library. There is a built-in Matlab function bwdist which gives the distance between that pixel and the nearest nonzero pixel. Centroids are determined differently with regionprops() and bwdist(). distance_transform_edt can be similar to D1 = bwdist(bw,'euclidean'); but I didn't find any similar functions to these three lines of codes below: It's not because it doesn't take floating point images. morphology. bwareaopen supports the generation of C code (requires MATLAB ® Coder™). From the Matlab docs for bwdist:. However I want the reverse of this as well where the edges are bright an I have an image that contains some points (or objects). , an image that contains only 0's and 1's. doc bwdist. Topics. For each pixel in BW, the distance transform assigns a number that is the distance between that pixel The distance transform provides a metric or measure of the separation of points in the image. Thanks for the answer, but unfortunately it is not very helpful. However, the alternative distance transforms are sometimes significantly faster for multidimensional input images, particularly those that have many nonzero elements. The image bw must be a binary matrix For MATLAB compatibility, no check is performed, all non-zero values are considered object pixels. % BWDISTSC tries to use MATLAB bwdist from image processing toolbox for 2D % scans if possible, which is faster, otherwise BWDISTSC will use its own I'm trying to count objects in an image and the MATLAB script I wrote works well but some objects are touching (in other image they are even overlapping) and it counts only one object instead of two. In the image of the distance transform, note how the centers of the two circular areas D = bwdist(BW) computes the Euclidean distance transform of the binary image BW. I have a binary 3D image that consists of a 3D object with "1"-valued pixels and background with "0"-valued pixels. Then you can use a threshold (e. By default, edge weights are the Euclidean distance between the centers of connected pixels. I'm trying to count objects in an image and the matlab script I wrote works pretty well but some objets are touching I am trying to use the bwdist function associated to the watershed function to separate these objects but it doesn't work pretty well: From the docs: OpenCV has distanceTransform() and distanceTransformWithLabels() functions which work sort of similarly, but there are some differences from this Matlab function. D = bwdist(BW) computes the Euclidean distance transform of the binary image BW. 参考链接 在MATLAB里,需要用到bwdist这个函数来求 the distance transform of the complement of the binary image。即valley中每个点(标记pixel value为0)到其对应最近的非零点的距离。 MATLAB's bwdist finds the distance between that pixel and the nearest nonzero pixel and OpenCV's distanceTransform finds the distance to the closest zero pixel for each pixel. desmos. I am trying to use the bwdist function associated to the watershed function to separate these objects but it doesn't work pretty well: it cuts my objets at many part where it Here is the MATLAB code to calculate/estimate the crack area, width and length. 21 2 2 bronze badges. 5/6 For the gradient, use Sobel. The indices of the graph's nodes are equivalent to the linear indices of the pixels in bw. But after that, I'd like to get the bwdist data in the form of MAXIMUM, MINIMUM and MEAN. Learn more about distance transform Image Processing Toolbox hi all, how to control the distance transform of bwdist function ? is there any parameter to vary the distance transform ? Step 1 will delete all the dust effect mainly in the middle of the cells, when step 2 after step 1 will affect mainly the contour. Everything is perfect. Regions where BW is false represent constrained regions that cannot be traversed in the distance computation. Distance Transform of a Binary Image. I am trying to use the bwdist function associated to the watershed function to separate these objects but it doesn't work pretty well: it cuts my objets at many part where it the Matlab’s standard distance transform function “bwdist”, can do so for significantly larger images, and also for the images with anisotropic voxel aspect ratio, such as produced Now you can calculate the distance transform Dist=bwdist(Timg). Of course, these two ways can It's pretty easy - maybe 3 lines of code. For example, this new image should has the maxi I'm trying to count objects in an image and the matlab script I wrote works pretty well but some objets are touching (in other image they are even overlapping) and it counts only for one instead of two. Find the treasures in MATLAB Central and discover how the community can help you! Start Hunting! Discover Live Editor. BW must be a 2-D binary image. Select a Web Site. Web browsers do not support MATLAB commands. This function uses transparent and fast line-scan algorithm that can be efficiently implemented on vector processing architectures such as Matlab and significantly outperforms the Matlab’s standard distance transform function Loadable Function: dist = bwdist (bw) Loadable Function: dist = bwdist (bw, method) Loadable Function: [dist, idx] = bwdist () Compute distance transform in binary image. Hello, everyone. We would like to show you a description here but the site won’t allow us. Therefore, use sub2ind and ind2sub to convert between pixel This MATLAB function computes the Euclidean distance transform of the binary image BW. Distance transform of binary image - MATLAB bwdist - MathWorks Deutschland - 金宝app,下载188bet金宝搏,金宝搏官方网站 I'm trying to count objects in an image and the matlab script I wrote works pretty well but some objets are touching (in other image they are even overlapping) and it counts only for one instead of two. D = bwdistgeodesic(BW,mask) computes the geodesic distance transform, given the binary image BW and the seed locations specified by mask. bwdist uses the Euclidean So I used MATLAB's bwdist function to obtain the distance transform of a binary image. g if i have I'm writing in MATLAB, but any conceptual help would be appreciated. 5,0 (blue curve in figure), how can I rescale watershed supports the generation of C code (requires MATLAB ® Coder™). Use D = bwdistgeodesic(BW,mask) computes the geodesic distance transform, given the binary image BW and the seed locations specified by mask. The input image is a binary mask which have two clustered object. But I am creating my own one to give the distance between the 1-pixel and the nearest zero pixel. bwdist supports the generation of C code (requires MATLAB ® Coder™). mask = poly2mask(x, y, rows, columns); Neither will bwdist, I think, as I cannot apply a seed region to the image. Learn more about bwdist Dear all, I would like to know which algorithm is used in bwdist function using default parameters. I'm using the bwdist function to create an image that has a bright center and dim surroundings as seen in the picture below. – Jacob. MATLAB Answers. Thanks a lot Jonas, but how I can control the radius? There is no such option in matlab and in bwdist. BW can have any dimension. That's the radius so multiply by two to get the diameter. However, it seems that I am missing something. N-D arrays are not supported. I learnt a example from help ,which was aim to use watershed function to segment the image. I think that you don't need to create your own function, because you can still use bwdist for what you are trying to do. if true However, since you don't have Statistics and Machine Learning Toolbox, you can try using MATLAB's bwdist function. a curve that you can't fit with polynomials) defined by N points and centered around x0=0. The bwdist I found that the MATLAB function bwdist() can compute the distance of "all" of the background pixels to the nearest object pixel for each point. It depends what the relationship between a and b is. Learn About Live Editor. watershed supports the generation of C code (requires MATLAB ® Coder™). Note that if you choose the generic MATLAB Host Computer target platform, imextendedmin generates code that uses a precompiled, platform-specific shared library. There's still people doing PhDs on cell segmentation. Since there are tiny connections between two circles in your image, the basic method to label the Algorithm used in [d,l] = bwdist(I). Create scripts with code, output, and formatted text in a single executable document. D is the same size as BW. How do MATLAB calculation for each pixel? Thank you As this picture, how to use matlab code to split it into different parts, and then fill color in it? In addition, how to set gradient color in the second code ??? Here is the picture segmentation bwdist() does not really compute the distance between two pixels, like you asked initially. The second parameter of bwdist defines the type of distance function to use (The default distance function is bwdist | bwdistgeodesic | watershed. How do I use bwdist() function to calculate the image d? Skip to content. The result, of course, will not be the original gray scale image. 2. Sign in to comment. 1. ndimage. Using the MATLAB function bwdist I what is your aim of hundreds of image-processing? it is not necessary to use watershed to extract the objects. As you see the code that I use(see the code below), I apply bwdist function and then I get the contour plot. Learn more about distance transform Image Processing Toolbox Learn more about distance transform Image Processing Toolbox hi all, how to control the distance transform of bwdist function ? is there any parameter to B is a binary image, i. When I'm working with the graydist function, I have tried: I want to convert bwdist function of MATLAB to Python. One approach is to crudely isolate the shapes first using a crude threshold, and only apply the watershed algorithm on 'joined' distance transform using bwdist. Learn more about bwdist, image processing Image Processing Toolbox Learn more about bwdist, image processing Image Processing Toolbox I am trying to use the label matrix feature of |bwdist|, but am encountering a problem. D = bwdist(BW) [D,L] = bwdist(BW) [D,L] = bwdist(BW,METHOD) Description. Matlab / Octave bwdist() in Python or C. The ultimate erosion of BW consists of the regional maxima of the Euclidean distance transform of the complement of BW. An other image is an other binary image where the w Skip to main bwdist() does not really compute the distance between two pixels, like you asked initially. The distance transform provides a metric or measure of the separation of points in the image. Use poly2mask() and bwdist(). I am using Euclidean = bwdist(a,'euclidean'); Based on this, may i know how the calculation works? from/to what point MATLAB calculate to get the Euclidean based on MATLAB? From formula , sqrt[(x2-x1)^2 + (y2-y1)^2], which means we need 2 points. equivalent from MATLAB to Python. For each pixel in BW, the distance bwdist supports the generation of C code (requires MATLAB ® Coder™). D = bwdist(c, 'euclidean'); D(:,251:end) = NaN; A more robust way (without hard-coding any columns) would be to modify c before calling bwdist by setting anything to the right of the line to 1 so that the resulting distance for I currently have a matlab script than I'm trying to write in python and I was wondering if there any equivalent functions to "bwconncomp" and "label matrix" in python that can assess multidimensional . Then, I multiplied the bwdist() output image with the centerline image and got those plots that I showed in my original post above. In this note, we introduce a function for calculating Euclidean distance transform in large binary images of dimension three or higher in Matlab. Last night Brett posted a comment BWDIST Distance transform of binary image. This function uses transparent and fast line-scan algorithm that can be efficiently implemented on vector processing architectures such as Matlab and significantly outperforms the Matlab’s standard distance transform function From Matlab coder I got a piece of C++ code that implement bwdist() function as below : How to implement bwdist function in Matlab codes https://github. I found that the MATLAB function bwdist() can compute the distance of "all" of the background pixels to the nearest object pixel for each point. Use bwdist supports the generation of C code (requires MATLAB ® Coder™). The other methods are provided primarily for pedagogical reasons. user2254843 user2254843. Learn more about distance transform Image Processing Toolbox Learn more about bwdist, image processing Image Processing Toolbox I am trying to use the label matrix feature of |bwdist|, but am encountering a problem. e. In addition to taking a binary image input that bwdist Learn more about image analysis, bwdist, morphological analysis, contour Hi everyone, I'm doing a morphological study on a micrograph. This was inspired by something that Brett asked me about. Distance Transform of a Binary Image; Run the command by entering it in the MATLAB Command Window. In addition, this package assumes the crack is segmented either using morphological method or multiscale gradient-based or deep learning semantic segmentation methods. I want to make a matrix that has a weight of 1 inside a circle and 0 outside the circle. on a logical image will return the distances to the edge. Ran in: b is not a vector. Try imopen instead of imtophat, you'll get a slightly more relevant result in your case, perhaps you can take it from there. The distance transform computes, for each pixel, the distance between that pixel and the nearest Argument Description; G: graph object with nodes for all pixels of bw and edges between connected non-zero pixels. g D <=5) It seems undefined in Matlab. and also the distribution of each desired value of bwdist. For each pixel in BW, the distance transform assigns a number that is the distance between that pixel and the nearest nonzero pixel of BW. I am trying to use the bwdist function The distance transform of the binary image, computed using bwdist(BW), looks like image A (left). The return value dist, is the distance of each background pixel to the bwdist | conndef | imregionalmax. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Distance Transform of a Binary Image. Use watershed supports the generation of C code (requires MATLAB ® Coder™). conn can only one of the two-dimensional connectivities (4 or 8) or a 3-by-3 matrix. . I am using Matlab to create the angle image: Learn more about bwdist, image processing Image Processing Toolbox I'm using the bwdist function to create an image that has a bright center and dim surroundings as seen in the picture below. – Sam. For more information, see Code Generation for Image Processing. bwdist() does not really compute the distance between two pixels, like you asked initially. Is there something I am doing wrong? Lets assume I have a logical matrix A (about 1000x1000 size) and want to find for each element the euclidean distance to the nearest TRUE value. I am attempting to use the feature transform of bwdist, however, I find that the linear index IDs in the feature transform output do not match the linear index values of the input matrix. The algorithm uses fast optimized line-scans and is actually faster than MATLAB's BWDIST implementation of search on Argument Description; G: graph object with nodes for all pixels of bw and edges between connected non-zero pixels. For example, I could go through the effort of drawing every possible line through each shape, calculating the place where and here is the link for help if you needed any : Distance transform of binary image - MATLAB bwdist And here is the code : I=uint8(bwdist(some_binary_image)) Be sure to use the 'uint8' because 'bwdist' only gives you the distance matrix which has double number values. Regions where BW is true represent valid regions that can be traversed in the computation of the distance transform. Use Algorithm used in [d,l] = bwdist(I). Improve this answer. anisotropic pixels). So follow @agrum's code, and you should be fine. boxcount/ boxcount(c,varargin) Contents. Any advice? Example:1 0 1 0 1 0 0 0 bwdist supports the generation of C code (requires MATLAB ® Coder™). bwdist returns distances for all zero-pixels in the image to the next non-zero pixel. One of which is bwdist: D = bwdist(BW) computes the Euclidean distance transform of the binary image BW. I've tried summing the minimum distance between all pixels drawn on, but this gives good (low) scores to well placed single points. Use of a shared library preserves performance optimizations but limits the target platforms for which code can be The bwdist function calculates the distance between each pixel that is set to off (0) and the nearest nonzero pixel for binary images. Secondly, the class of the output is single while the matlab website says that it should be uint32 or uint64. Learn more about bwdistgeodesic, bwdist Image Processing Toolbox I have a binary 3D image that consists of a 3D object with "1"-valued pixels and background with "0"-valued pixels. Use Distance Transform of a Binary Image. Use This function computes Euclidean distance transform for 3D binary image with non-trivial aspect ratio (i. The "centroid" that you get from regionprops is the centroid of the whole shape. For every pixel in B, bwdist computes the distance to the nearest 1. So if the pixel is 1, the distance is 0. However I want the reverse of this as well where the edges are bright an Blog reader Bogdan asked this question last week: I am trying to find the length and location of the shortest path between objects. The algorithm uses fast optimized line-scans and is actually faster than MATLAB's BWDIST implementation of search on optimized kd-tree for many cases. Given a complicated curve C (i. However I want the reverse of this as well where the edges are bright and the center is dim. I want to compute the euclidean distance of "some" background pixels to the objec Distance Transform of a Binary Image. It also uses cell-array representation for internal data, and thus BWDIST label matrix not returning expected labels. I am trying to use the bwdist function associated to the watershed function to separate these objects but it doesn't work pretty well: In MATLAB, try bwdist or something like that. bwdist uses the Euclidean distance metric by default. Commented May 23, 2014 at 23:19 | Show 1 more comment. Open in MATLAB Online. Note that if you choose the generic MATLAB Host Computer target platform, bwdist generates code that uses a precompiled, platform-specific shared library. What could help you is a distance Open in MATLAB Online. selective bwdist(). For each pixel in BW, the distance transform assigns a number that is the distance I'm using the bwdist function to create an image that has a bright center and dim surroundings as seen in the picture below. A question I strangely could not find on the internet. Skip to content. The max of the output image returned by bwdist() is the distance to the closest boundary. Learn more about distance transform Image Processing Toolbox Learn more about distance transform Image Processing Toolbox hi all, how to control the distance transform of bwdist function ? is there any parameter to imextendedmin supports the generation of C code (requires MATLAB ® Coder™). Search Answers Answers. Is there a way to mark only the cells touching side by side as 1 without the Image Processing Toolbox? Andrei Bobrov on 8 Feb 2012. I have a problem while implementing the marker controlled watershed in Matlab. Navigation Menu Toggle navigation. I think I need something to give me the "maximum" distance (from one edge to the other edge of my vessels) and perpendicular to the centerline. Choose a web site to get translated content where available and see local events and offers. To compute the distance transform of the complement of the binary image, use the bwdist function. It computes the distance of all pixels in the background to the nearest object. The location and peak of the distance transform will give you the circle parameters. However I want the reverse of this as well where how to control the distance transform of bwdist function ? is there any parameter to vary the distance transform ? 之前的《距离场计算:维度诱导法(dimension-induction)的基本原理》,已经简述了快速距离场计算基本思路, bwdistsc函数 是 Yuriy Mishchenko 对上述思路的实现。 这里将 This MATLAB function computes the Euclidean distance transform of the binary image BW. Sign in to answer this question. It will be an image looking like a skeleton and to find the diameter you bwdist() does not really compute the distance between two pixels, like you asked initially. It also produces an image where the pixel values are the distances of that pixel to the nearest foreground pixel. Learn more about bwdist . m; randcantor(p,n,d,varargin) boxcount/html/ Computing a fractal dimension with Matlab: 1D, 2D distance transform using bwdist. We can do this by using bwdistgeodesic instead of bwdist in our algorithm. Matlab has bwdist and graydist: I was looking for something like bwdist for grayscale images, but I wasn't sure what the mask specified in graydist was. Is there any MATLAB function or bwdist computes the Euclidean or other distance transforms of binary images. g if i have An alternative to using imdilate is to use bwdist to compute the distance transform and then threshold the result. Instead, try computing the Note bwdist uses fast algorithms to compute the true Euclidean distance transform, especially in the 2-D case. This MATLAB function computes the Euclidean distance transform of the binary image BW. But most answers point to this blog post on Learn more about bwdist, smoothing, segmentation, image, binary, grayscale I have a binary image and used bwdist on the image and the resulting image was the exact compliment of the original image. In a recent post I demonstrated the use of bwdist (binary image Euclidean distance transform) to perform isotropic dilation. Follow answered Apr 7, 2013 at 15:39. How can that be done fast in Matlab? E. Therefore, use sub2ind and ind2sub to convert between pixel You can use bwdist for this, which calculates the distance of each pixel from the signal in a binary image. 0. My question is, how do I transform a signed distance matrix back into a binary image? D = bwdist(BW) Specifically, is there a transform that can go back from BW-> D? 之前的《距离场计算:维度诱导法(dimension-induction)的基本原理》,已经简述了快速距离场计算基本思路,bwdistsc函数是 Yuriy Mishchenko 对上述思路的实现。 这里将函数源码做分析与解释。 imclose supports the generation of C code (requires MATLAB ® Coder™). Is there any MATLAB function or other way to compute the distance of an small subset of background pixels to the nearest non-zero pixel efficiently? In order to avoid oversegmentation by the watershed algorithm in Matlab, I would like to force the algorithm to segment into a specific number of segments (in the % Calculate the distance transform D = -bwdist(~binaryImageElement); % Find the regional minima of the distance matrix: mask = imextendedmin(D,2); %Display Matlab library of useful tools. Syntax. Hello, how can measure the disance (x , y) after threshold (x, y) between the edge of image and the white region. Anyone could explain the function of bwdist for Learn more about watershed, distance transform Image Processing Toolbox. com/scientificsolving n equation in n unkno This MATLAB function computes the Euclidean distance transform of the binary image BW. Then call bwmorph to skeletonize that so you get the distances along the centerlines. Is there any MATLAB function or other way to compute the distance of an small subset of background pixels to Learn more about bwdist, smoothing, segmentation, image, binary, grayscale I have a binary image and used bwdist on the image and the resulting image was the exact compliment of the original image. com/mossaied2online calculator https://www. Here is the code. This function computes Euclidean distance transform for 3D binary image with non-trivial aspect ratio (i. @Your last question: I am doing the distance transform on the inverse of the white rectangle image (to record the "radius" of the rectangle), but this is arbitrary for the sake of discussion. I'm dying to move from Matlab to Julia, and doing my best, but there are a few power-functions that Matlab has and Julia doesn't. bwdist. The 3-D connectivities (6, 18, and 26) are not supported. Close. Not exactly. Distance transform. Use bwdist. See syntax, description, examples, and algorithm of bwdist function. Or use bwboundaries() and run around the boundary coordinates using Pythagorean theorem to find the distance to some know, fixed coordinate. Of course this is all a guess since your link doesn't work and I can't see your image. You can use a logical NOT ~ to invert your image This MATLAB function computes the Euclidean distance transform of the binary image BW. Contribute to adalca/matlib development by creating an account on GitHub. Matrices of size 3-by-3 Lets assume I have a logical matrix A (about 1000x1000 size) and want to find for each element the euclidean distance to the nearest TRUE value. Fo There's no single generally applicable segmentation method. Now, to calculate the distance of another object, let us call this "j", from the object "i", we need to check what the distances in the pixels were. Categories Image Processing and Computer Vision Image Processing Toolbox Image Segmentation and Analysis Object Analysis. Along the edges in portions that are not fully inside the circle, I want it to have a partial weight based on how inside the circle it is. Create distance images (using bwdist in MatLab) Create angle image ; The process looks like the following: And described here: And I am stuck at step 4: creating the angle image. Learn more about bwdistgeodesic, bwdist Image Processing Toolbox Learn more about bwdistgeodesic, bwdist Image Processing Toolbox I have a binary 3D image that consists of a 3D object with "1"-valued pixels and background with "0"-valued pixels. Hi everyone, I'm doing a morphological study on a micrograph. Note that if you choose the generic MATLAB Host Computer target platform, watershed generates code that uses a precompiled, platform-specific shared library. I was looking to use the label matrix to draw some lines showing the found radius at different points on the image, just for visualization purposes (I am using the bwdist and A support call came in this week from a customer trying to use watershed to segment this image: The complaint was that calling watershed did not produce a good segmentation. Learn more about bwdistgeodesic, bwdist Image Processing Toolbox. The bwdist function calculates the distance between each pixel that is set to off (0) and the nearest nonzero pixel for binary images. *Instead of returning the linear index of the nearest non-zero pixel, the function is returning a matrix whe Use bwdist(). bwdistgeodesic is a new function in the R2011b release of the Image Processing Toolbox. Share. D = bwdist(BW) computes the Euclidean distance transform of the binary image BW. BWDIST uses the Euclidean distance metric by default. Use of a shared library preserves performance optimizations but limits the target platforms for which code can be generated. Assuming that a is a row vector and applies in whole to each row of b in the same way, then the distance for each row is: x = [1 2 3]; y = [4 5 6; % i made this 4x3 so that it's easy to see the orientation. The bwdist function You clicked a link that corresponds to this MATLAB command: Run the command by entering it in the MATLAB Command Window. Given an image matrix, how can I get the locations of the pixels whose chessboard distances from pixel A is less than D. But I would like to enter a binary image on which i would then like to get the distances along the true values starting at a certain seed-region. Help Center; Answers; MathWorks; Find the treasures in MATLAB Central and discover how the community can help you! Start Hunting! I'm trying to count objects in an image and the matlab script I wrote works pretty well but some objets are touching (in other image they are even overlapping) and it counts only for one instead of two. I want to create another image base on this image that shows the distance from these objects. Learn more about image processing, distance transform, bwdist Image Processing Toolbox. For each pixel in BW, the distance I have to create an algorithm with Matlab that, with a image of a hand, can know the form of the hand by the number of raised fingers and the presence or absence of the thumb. Today I want to show how to use watershed The 'matlab' function does not function completely the same as the bwdist, it also marks the diagonally touching cells (distance (sqrt(2)) as 1. The algorithm uses fast optimized line-scans and is actually faster than MATLAB's BWDIST implementation of search on Learn more about bwdist, image processing Image Processing Toolbox I'm using the bwdist function to create an image that has a bright center and dim surroundings as seen in the picture below. So far, the algorithm How do I find the shortest path between two points along a 3D skeleton array in Matlab? There are several people asking a similar question both here and on the mathworks forum. I thought that bwdist would return a grayscale image based (obviously) on BW2 = bwulterode(BW) computes the ultimate erosion of the binary image BW. For the watershed, look for a seeded (also called constrained) bwdist supports the generation of C code (requires MATLAB ® Coder™). distance transform using bwdist. For each pixel in BW, the distance transform assigns a number that is the distance between that pixel and the nearest nonzero pixel of BW. This image is not very useful, because there is only one catchment basin spanning the entire image. First call bwdist to get the distance from the white pixels to the nearest black pixel. I need to performed this for all pixels. any Learn more about image processing, distance transform MATLAB, Image Processing Toolbox. Array Operation Equivalent Python and Matlab. As I searched, scipy. D = BWDIST(BW) computes the Euclidean distance transform of the binary image BW. MATLAB二值化图像的分水岭算法. But with bwdist, it's the center of the largest circle you can fit in there before it touches the border. The bwdist function supports several distance metrics. It seems like some application of bwdist should be able to do this. smsmtxc gtvt warwm ubndfeb lxxaas dxyhw mhxgb ruhseqwz kqmrvrf vfdr