HW4 and HW5 grades have been published | |
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Hi all, The grades for HW4 and HW5 have been published. In order to obtain a list of the comments for your exercise, send a mail to Anastasia (HW4) and Guy (HW5). You can then approach us for a more in-depth discussion of the exercises. Regards, The course staff |
| פורסם ב-18/2/2010, 12:24:18 Created on 18/2/2010, 12:24:18 Создано18/2/2010, 12:24:18 تم النشر ب-18/2/2010, 12:24:18 |
Project presentations | |
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Hi All, The project presentations will be held on 1/3/2010, at 15:00, (location TBD). At this time, we expect: - A presentation of 15 minutes explaining the work done and what was achieved. - A report which details your work, including examples and explanations (written as a technical report / paper) - A DVD/CD/USB including: 1. The documented code, including running scripts, data, instructions and all, so that we can run it. Leave an email in case we have questions on how to run it. 2. Presentation and videos 3. Report and relevant references Note that the month+ given is not a lot of time. If anyone still has questions, it's a good time to raise them. Also, the following IDs please notify Guy regarding their chosen project, after you've discussed it with the relevant POC.: 65656506, 314422098, 304040496, 332368596, 28543718. Regards, The course staff. |
| פורסם ב-7/2/2010, 15:32:08 Created on 7/2/2010, 15:32:08 Создано7/2/2010, 15:32:08 تم النشر ب-7/2/2010, 15:32:08 |
HW3 grades have been published | |
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Hi all, The grades for HW3 have been published. In order to obtain a list of the comments for your exercise, send a mail to unastyadattx.technion.ac.il. You can then approach us for a more in-depth discussion of the exercises. Regards, The course staff |
| פורסם ב-2/2/2010, 14:57:21 Created on 2/2/2010, 14:57:21 Создано2/2/2010, 14:57:21 تم النشر ب-2/2/2010, 14:57:21 |
Clarifications on HW5 | |
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Hi all A few clarifications regarding HW5: 1. Regarding the choice of a color space for active contours, it should still be a complete color space -RGB,HSV,YCbCr, Lab, etc - i.e, not a single projection. Although specifically the pepper does not require more than one direction for segmentation, the Chan-vese / GAC / combined model is to use a color/vector formulation, and be quite general (at least on 'easy' segmentation images). If you wish, after doing the "either" part (showing GAC and CV), you can in the "both" part (note the "and") use a different function of the image for the active contour to work on. 2. Display in the hand-in the result of both SMACOF and classical scaling. 3. Ex. 3 in problem 1 simply requires going over the phases of the convergence proof for SMACOF and explain all its phases. You're not missing out on anything. As always, if you're not sure, feel free to ask. Regards, The course staff. |
| עדכון אחרון ב-23/1/2010, 12:20:29 Last updated on 23/1/2010, 12:20:29 Последняя модификация23/1/2010, 12:20:29 تمت الحتلنة الأخيرة ب-23/1/2010, 12:20:29 |
Recommended course | |
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Hi All, For those of you looking for a course to take next semester, the following recommended course will be given which continues the topics discussed in the 236861 course into the realm of surface processing and numerical geometry of surfaces. Regards The Course Staff ----------------------------------------------------- Processing and analysis of geometric objects (given as Advanced topics in vision, image understanding, and computer vision 48921) The course is a self-contained comprehensive introduction to modern analysis, processing, and synthesis of geometric shapes, with a good balance between theory, numerical methods, and applications. The course will address problems such as deformation-invariant similarity and correspondence of shapes, similarity and correspondence of shapes with different topology, partial similarity and correspondence. A wide variety of topics will be covered, including: metric geometry as a model of rigid and non-rigid shapes, geometric invariants, approximation of geodesic distances, multidimensional scaling methods and their use for invariant representations of non-rigid shapes, spectral methods and the Laplace-Beltrami operator, intrinsic similarity of shapes and the Gromov-Hausdorff distances, extrinsic and intrinsic self-similarity and symmetry, shape spaces and calculus of shapes. One of the main emphases of the course will be on practical methods, which will be used in class and home assignments. Examples of applications from computer vision and pattern recognition, computer graphics, and geometry processing will be shown, including: 2D and 3D shape recognition, expression-invariant face recognition, texture mapping, morphing and animation. The course will be held on Thursdays, 12:30 - 14:30, Department of Electrical Engineering (Meyer building) The teacher is Dr. Michael Bronstein (http://www.cs.technion.ac.il/~mbron/) Grade will consist of home assignments (50%) and project (50%). Students will be able to choose the topic of their project, and are encouraged to bring a topic related to their research. For course syllabus and additional information, see http://tosca.cs.technion.ac.il/book/course_technion10.html or contact umbronatcs.technion.ac.il |
| פורסם ב-19/1/2010, 23:41:55 Created on 19/1/2010, 23:41:55 Создано19/1/2010, 23:41:55 تم النشر ب-19/1/2010, 23:41:55 |
Clarification on HW5 | |
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Hi All, 1. In problem 1, ex. 1, You need to find an algorithm for minimizing the function using majorization, show that the iterations there indeed majorize the function, and use it to find the minimizer of this function. At the end, it should include a numerical algorithm + implementation and show it converges to a minimum of this function. 2. Regarding GAC and Chan-Vese, you should implement each of them anyhow. By saying "both", we mean a functional which sums the two (need not be equal weights - choose whatever works best, but it should not be difficult on this image). Compare the results from these 3 possibilities. Regards, The course staff |
| פורסם ב-19/1/2010, 09:46:43 Created on 19/1/2010, 09:46:43 Создано19/1/2010, 09:46:43 تم النشر ب-19/1/2010, 09:46:43 |
HW5 published | |
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Hi all, HW5 is now available, due 25/1/2010. It is relatively not a lot of work, so that you can finish it quickly and turn to the projects. Those who have not yet came to consult with the POCs / course staff regarding specific projects -- it's high time to do so. Regards, The course staff |
| פורסם ב-11/1/2010, 15:52:02 Created on 11/1/2010, 15:52:02 Создано11/1/2010, 15:52:02 تم النشر ب-11/1/2010, 15:52:02 |
Links to papers describing curvature estimation for trianguled meshes | |
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Hi All, We posted links to two papers describing possible ways to estimate Mean and Gaussian curvatures on triangulated meshes, at the Links section. Regards, The course staff |
| פורסם ב-11/1/2010, 13:05:39 Created on 11/1/2010, 13:05:39 Создано11/1/2010, 13:05:39 تم النشر ب-11/1/2010, 13:05:39 |
HW2 grades, postponement of HW4 | |
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Hi all, 1. The grades for HW2 have been published. In order to obtain a list of the comments for your exercise, send a mail to unastyadattx.technion.ac.il. You can then approach us for a more in-depth discussion of the exercises. 2. Due to your requests, we postpone HW4 to midnight 14.1. Please note that HW5 will be published this week. Regards, The course staff |
| פורסם ב-10/1/2010, 13:48:54 Created on 10/1/2010, 13:48:54 Создано10/1/2010, 13:48:54 تم النشر ب-10/1/2010, 13:48:54 |
The list of the final projects has been published | |
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Hi All, The list of the final projects has been prepared. Approach Guy or Anastasia for a hard copy of it. Please, choose a project by the end of the next week (14/01/10). Should you have any questions - approach us ASAP. The project presentation day will take place at the end of the exam period (end of February). The exact date will be announced later. Regards, The course stuff |
| פורסם ב-4/1/2010, 11:05:24 Created on 4/1/2010, 11:05:24 Создано4/1/2010, 11:05:24 تم النشر ب-4/1/2010, 11:05:24 |
HW4 has been published | |
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Hi All, HW4, on surface evolution, fast marching methods and non-linear diffusion filtering, has been published. Regards, The course stuff |
| פורסם ב-30/12/2009, 11:43:16 Created on 30/12/2009, 11:43:16 Создано30/12/2009, 11:43:16 تم النشر ب-30/12/2009, 11:43:16 |
HW1 grades | |
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Hi All, The grades for HW1 are now published. If you want to see a list of remarks on your exercises, or do not have a gr account and wish to know your grade, send an email to Guy with your name + ID. Regards, The course staff. |
| פורסם ב-1/12/2009, 16:39:25 Created on 1/12/2009, 16:39:25 Создано1/12/2009, 16:39:25 تم النشر ب-1/12/2009, 16:39:25 |
HW3 has been published | |
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Hi All, HW3, on differential geometry of surfaces and curve evolution, has been published. Regards, The course stuff |
| פורסם ב-30/11/2009, 18:45:23 Created on 30/11/2009, 18:45:23 Создано30/11/2009, 18:45:23 تم النشر ب-30/11/2009, 18:45:23 |
Clarifications | |
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Hi all, A few clarifications: 1. In HW2, where it says "stability", unless otherwise written, assume unconditional stability. This is the same as taking C(N) in the definition of stability to be a constant, or that the iterations are contracting. This is unlike the various forms of weak stability mentioned in class. 2. Tutorial #3 has been updated to clarify that. 3. In the shear invariants question, the Tangent and Normal are not necessarily the Euclidean ones, as discussed in chapter 2. - The curvature, for a certain invariant, is the simplest invariant differential quantity other than the arclength. It does not have to be derived in the exact same manner of subsection 2.2.2 in the book. - When looking for the arclength, note that it should be defined so as to allow re-parameterization of the curve by an integral, and must be invariant to the initial parametrization of the curve, as well as the transformation group involved. The course staff |
| פורסם ב-23/11/2009, 16:16:28 Created on 23/11/2009, 16:16:28 Создано23/11/2009, 16:16:28 تم النشر ب-23/11/2009, 16:16:28 |
HW2 published, guidelines | |
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Hi All, HW2, on numerical schemes and differential geometry, has been published. Please, submit all the files (solution, well-documented Matlab functions, and test scripts) in an archive (zip, tar, rar). Give it a meaningful name, i.e. your ID number or name. Also, make sure that you state your name and ID in the solution itself, and that the solution is clearly written. Note the submission deadline! Since no late submission policy was announced, we won't discard the 1st exercises submitted after the deadline without approval. From now on, if you need an extension - approach us in advance, and state that you were given an extension. If you submit the exercise late without approval, we will: - Take off 5 points for each late day; up to 3 days. - Grade 0 exercises submitted after more than 3 days after the deadline. Regards, The course stuff |
| פורסם ב-12/11/2009, 00:08:27 Created on 12/11/2009, 00:08:27 Создано12/11/2009, 00:08:27 تم النشر ب-12/11/2009, 00:08:27 |
Clarifications on HW 1 | |
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Hi All, Two clarifications regarding the HW: 1. In problem 2, subproblem 1, you may have to guess classes of functions and prove solutions, as we did in class. 2. In problem 2, subproblem 2, we're not looking for the optimal solution, but rather a dependence of u(x) on "the rest" of the function -- z is merely an auxiliary variable. At the end we're looking for an expression that will allow us to run an iterative scheme. It is true that a constant function may solve the functional - but it is less relevant from our point of view, for reasons we'll explain later on. You are required to find a quite elegant expression of u(x) as dependent on u(z) - the reason we consider them as different functions is that we would like to keep the u(z) part from the previous iterations. Guy |
| פורסם ב-2/11/2009, 16:20:04 Created on 2/11/2009, 16:20:04 Создано2/11/2009, 16:20:04 تم النشر ب-2/11/2009, 16:20:04 |
HW1 published, due date 9/11/9 | |
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Hi All, HW1, regarding calculus of variations and the heat flow, has been published. If you have any questions, do not hesitate to email me. Guy |
| פורסם ב-26/10/2009, 20:00:32 Created on 26/10/2009, 20:00:32 Создано26/10/2009, 20:00:32 تم النشر ب-26/10/2009, 20:00:32 |
Complementary slides on optimization & additional books in the literature section | |
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Hi All, An additional slides set on optimization was added to the tutorials. It is non-obligatory, for those who wish to see the link to other fields. Also, new books on calculus of variations and differential geometry were added to the course website in the literature section. Guy |
| פורסם ב-19/10/2009, 20:20:03 Created on 19/10/2009, 20:20:03 Создано19/10/2009, 20:20:03 تم النشر ب-19/10/2009, 20:20:03 |