The objective of this homework is to reinforce the scale space response extrema concept in key...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
The objective of this homework is to reinforce the scale space response extrema concept in key points detection, and ask you to compute a LoG pyramid for scale space extrema detection, and compare that with the DoG pyramid based SIFT detection. An example is illustrated below, on the left is an image and its SIFT detection, with vl sift() and peakStrenthThres=16, on the right is the LoG based detection: 50 100 150 200 250 300 350 400 450 FAMILJE 100 200 300 400 500 600 700 50 100 150 200 250 300 350 400 450 100 200 log max 300 400 500 The LoG pyramid is computed for o = {1.200 1.518 1.920 2.429 3.072 3.886 4.915} 600 700 100 200 300 400 100 200 300 400 LOG (1.2) 200 V P 400 600 LOG (2.4) KANT WIREL 200 400 600 100 200 300 400 100 200 300 400 LOG (1.5) PAMARI TONG HAR 200 400 600 LOG (3.1) ENCE 200 400 600 100 200 300 400 100 200 300 400 LOG (1.9) UND LA 200 CHEM 200 LOG (3.9) LENO 400 600 Mpy DORE 400 600 You may choose to do SIFT like spatial-scale neighborhood extrema detection, or you may use the ALP like polynomial fitting and direct extrema detection method. The ALP like method is illustrated in the figure below: 15 10 5 0 1 1.5 LoG response 2 0 2.5 3 3.5 Q1 [20 pts] Compute LoG Pyramid, show your code function [log_pyramid]=getLoGPyramid (im, scales) wwwwwwwwwwww 20 0 -20 -40 -60 -80 -100 -120 -140 -160 1 1.5 LoG response diff 2 0 2.5 3 The LoG response is given asf(o)=ao³ + bo² + co +d, the fitting can be done with polyfit(x, y, 3), and you can also compute its gradient. An extrema is detected by checking its gradient value. 3.5 Q2 [30 pts] Compute LoG response extrema. ECE/CS 479/5582 Computer Vision function [x0, y_max]=getScale Response Extrema(x, y) HW-3 Q3 [50 pts] Give the image level LoG key points detection and visualize and compare with SIFT detection. function [x, y, scale] =getLoGKeyPoints (im, log_peak_thres) The objective of this homework is to reinforce the scale space response extrema concept in key points detection, and ask you to compute a LoG pyramid for scale space extrema detection, and compare that with the DoG pyramid based SIFT detection. An example is illustrated below, on the left is an image and its SIFT detection, with vl sift() and peakStrenthThres=16, on the right is the LoG based detection: 50 100 150 200 250 300 350 400 450 FAMILJE 100 200 300 400 500 600 700 50 100 150 200 250 300 350 400 450 100 200 log max 300 400 500 The LoG pyramid is computed for o = {1.200 1.518 1.920 2.429 3.072 3.886 4.915} 600 700 100 200 300 400 100 200 300 400 LOG (1.2) 200 V P 400 600 LOG (2.4) KANT WIREL 200 400 600 100 200 300 400 100 200 300 400 LOG (1.5) PAMARI TONG HAR 200 400 600 LOG (3.1) ENCE 200 400 600 100 200 300 400 100 200 300 400 LOG (1.9) UND LA 200 CHEM 200 LOG (3.9) LENO 400 600 Mpy DORE 400 600 You may choose to do SIFT like spatial-scale neighborhood extrema detection, or you may use the ALP like polynomial fitting and direct extrema detection method. The ALP like method is illustrated in the figure below: 15 10 5 0 1 1.5 LoG response 2 0 2.5 3 3.5 Q1 [20 pts] Compute LoG Pyramid, show your code function [log_pyramid]=getLoGPyramid (im, scales) wwwwwwwwwwww 20 0 -20 -40 -60 -80 -100 -120 -140 -160 1 1.5 LoG response diff 2 0 2.5 3 The LoG response is given asf(o)=ao³ + bo² + co +d, the fitting can be done with polyfit(x, y, 3), and you can also compute its gradient. An extrema is detected by checking its gradient value. 3.5 Q2 [30 pts] Compute LoG response extrema. ECE/CS 479/5582 Computer Vision function [x0, y_max]=getScale Response Extrema(x, y) HW-3 Q3 [50 pts] Give the image level LoG key points detection and visualize and compare with SIFT detection. function [x, y, scale] =getLoGKeyPoints (im, log_peak_thres)
Expert Answer:
Answer rating: 100% (QA)
Here are more detailed stepbystep workings for the getScaleResponseExtrema function 1 ... View the full answer
Related Book For
Business Statistics in Practice
ISBN: 978-0077404741
6th edition
Authors: Bruce Bowerman, Richard O'Connell
Posted Date:
Students also viewed these accounting questions
-
The objective of this assignment is to make sure all course participants: a. Can compare and contrast countries for a potential market entry in a professional, structured, and data-based fashion. To...
-
The objective of this reflection paper requirement is to create relevance between the course content and what is going on around you. A reflection paper is a narrative you will write after you...
-
The objective of this project is to take the concepts learned in the course and apply them to your company's annual report. The following is a suggested format to use for this analysis: I. Executive...
-
Charles has a savings account with a balance, today, of 100,000 SAR in his investment account. He expects to obtain a yearly return of 12% in his investments. How long will it take for Charles to...
-
Explain the conclusions of Roe v. Wade and Planned Parenthood v. Casey.
-
For the 4node element shown in the figure, a linearly varying pressure \(p\) is applied along the edge. The finite element method converts the distributed force into an equivalent set of nodal forces...
-
Many researchers are interested in the transcription of protein-encoding genes in eukaryotes. Such researchers want to study mRNA. One method that is used to isolate mRNA is column chromatography....
-
In January 2013, Edi Thomas and George Lopez agreed to produce and sell chocolate candies. Thomas contributed $480,000 in cash to the business. Lopez contributed the building and equipment, valued at...
-
Use counting to determine the whole number that corresponds to the cardinality of these sets. (a) C = {xlx = N and (x-8)(x-3)=0} (b) D = {x|x EN, 1x 100 and x is divisible by both 6 and 7} (a) n(C) =...
-
Planning is one of the most important management functions in any business. A front office managers first step in planning should involve determine the departments goals. Planning also includes...
-
Exercise: Solve the following system of linear congruences x = 2 mod 6, x= 1 mod 5, r = 3 mod 7.
-
Spot USDJPY is trading at 113.15 and the 3 month forward points are -23. The exchange rate for the long leg of a 3 month swap will be?
-
what ways does the study of homologous structures inform our understanding of evolutionary transitions, adaptive radiations, and morphological diversity in the fossil record, providing insights into...
-
How do homologous structures, as defined by evolutionary biology, reflect common ancestry and divergent evolution among related species, and what molecular and developmental mechanisms underlie the...
-
Aaron Company completed 11,800 units of its single product, consuming 36,000 labor hours that cost the firm $554,400. Each unit should have required 3 hours of labor time at $15.80 per hour. On the...
-
How do endocrine hormones exert their biological effects through specific hormone-receptor interactions, signal transduction pathways, and downstream effector molecules, orchestrating diverse...
-
ABC, Inc. had a balance of $200 000 owner' equity at the end of last financial year (30 June 2019) During this year, the company recorded a net profit of $50 000, drawings of $30 000, and borrowed...
-
Whats the difference between an ordinary annuity and an annuity due? What type of annuity is shown below? How would you change the time line to show the other type of annuity?
-
The mean and the standard deviation of the sample of 40 trash bag breaking strengths are = 50.575 and s = l .6438. We give the mean and the standard deviation of a sample that has been randomly...
-
The controller of a large retail chain is concerned about a possible slowdown in payments by customers. The controller randomly selects a sample of 25 accounts and finds that the mean and the...
-
In a murder trial in Los Angeles, a shoe expert stated that the range of heights of men with a size 12 shoe is 71 inches to 76 inches. Suppose the heights of all men wearing size 12 shoes are...
-
Determine the equivalent resistance \(R_{\mathrm{eq}}\) for the circuit shown in Figure 6.11. Assume that all resistors have the same resistance of \(R\). FIGURE 6.11 Problem 4. R W R3 BA w R ww
-
Determine the equivalent resistance \(R_{\text {eq }}\) for the circuit shown in Figure 6.10. Assume that all resistors have the same resistance of \(R\). FIGURE 6.10 Problem 3. W R . WWW R5 w R2 R3...
-
The output voltage of a voltage divider is not fixed; it varies according to the load. a. Find the output voltage \(v_{\mathrm{o}}\) in Figure 6.13 for two different values of load resistance: (1)...
Study smarter with the SolutionInn App