UNIVERSITI SAINS MALAYSIA. CMT422 Multimedia Information Systems & Management [Sistem & Pengurusan Maklumat Multimedia]

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UNIVERSITI SAINS MALAYSIA Second Semester Examination 2014/2015 Academic Session June 2015 CMT422 Multimedia Information Systems & Management [Sistem & Pengurusan Maklumat Multimedia] Duration : 2 hours [Masa : 2 jam] INSTRUCTIONS TO CANDIDATE: [ARAHAN KEPADA CALON:] Please ensure that this examination paper contains EIGHT questions in SEVEN printed pages before you begin the examination. [Sila pastikan bahawa kertas peperiksaan ini mengandungi LAPAN soalan di dalam TUJUH muka surat yang bercetak sebelum anda memulakan peperiksaan ini.] Answer ALL questions. [Jawab SEMUA soalan.] You may answer the questions either in English or in Bahasa Malaysia. [Anda dibenarkan menjawab soalan sama ada dalam bahasa Inggeris atau bahasa Malaysia.] In the event of any discrepancies, the English version shall be used. [Sekiranya terdapat sebarang percanggahan pada soalan peperiksaan, versi bahasa Inggeris hendaklah diguna pakai.]...2/-

- 2-1. Name one (1) example of multimedia information system in the following domain and explain how your example suits to multimedia information system environment. Social networking media. Speech recognition. Pick one (1) of the Question 1 above and discuss the problem in retrieving data from its database. Draw the system architecture diagram of multimedia information system. Explain the role of each component of the architecture. 2. Give two (2) examples to each of low level and high level features, of the image shown below. Explain the important of low level and high level features in multimedia information system. Explain the relation between low level and high level features. 3. List the component of MPEG 7 in multimedia information system. Explain the role of XML in MPEG 7. Explain how low level and high level features of an image help MPEG7 technology....3/-

- 3-4. Based on the figure below, answer the following questions. Query (new sample) Classification for multimedia retrieval process How many classes in the above classification and name them all? Given a new query (new sample) as shown in figure above, identify the class category of new sample when KNN method is used with K is 5. Explain how you derive the answer. SVM method is used. Explain how you derive the answer. 5. There is a database of different type of flowers along with its characteristics measurement such as height, colour, stamen, and etc. You have been asked to develop a KNN based classifier for a flower recognition system. Answer the following. Plot a classifier graph (state your assumption). Discuss on the term training sample and testing sample. Discuss how K influences the result of the query. (12 /100) 6. Consider the case of an information retrieval system that is designed to retrieve digital representations of aerial photographs for use by cartographers when creating maps and charts. A design for the indexing and retrieval techniques is developed; in which the following issues are addressed and the corresponding design decisions are justified, both in terms of technical feasibility and in terms of utility for the intended purpose: What indexing features will be used? You are free to choose manually assigned features, automatically derived features, or any combination of the two approaches. Discuss the possible query interface for this aerial photographs data. Highlights the rationale of your choice....4/-

- 4-7. What are the fundamental differences between recall and precision and which is a more desirable characteristic? Given Rq is a set of relevant images for query q: R q = {d 3, d 5, d 9, d 25, d 39, d 44, d 56, d 89, d 123} A new image retrieval algorithm that you have just designed has returned the following ranked answer set on query q: 1. d 123 6. d 9 11. d 38 2. d 84 7. d 51 12. d 48 3. d 56 8. d 129 13. d 250 4. d 6 9. d 187 14. d 113 5. d 8 10. d 25 15. d 3 Answer the following questions: (iii) Calculate the precision and recall for the first 8 answer set. Draw the precision versus recall graph for the entire answer set. What can you conclude from the above graph about the performance of your retrieval algorithm? 8. Define the following terms. Give an example for each of your answer. Preventive Digital Right Management (DRM) technology. Reactive Digital Right Management (DRM) technology....5/-

KERTAS SOALAN DALAM VERSI BAHASA MALAYSIA - 5-1. Namakan satu (1) contoh sistem maklumat multimedia di dalam domain-domain di bawah dan terangkan bagaimana contoh anda sesuai dengan persekitaran sistem maklumat multimedia. Media rangkaian sosial. Pengecaman suara. Pilih satu (1) dari Soalan 1 di atas dan bincangkan masalah capaian data terhadap pangkalan datanya. Lukiskan seni bina sistem untuk sistem maklumat multimedia. Terangkan peranan setiap komponen di dalam seni bina tersebut. 2. Berikan dua (2) contoh elemen untuk setiap berikut: elemen paras rendah dan elemen paras tinggi untuk imej di bawah. Terangkan kepentingan elemen paras rendah dan paras tinggi di dalam sistem maklumat multimedia. Terangkan hubungan di antara elemen paras rendah dan paras tinggi. 3. Senaraikan komponen MPEG7 di dalam sistem maklumat multimedia. Terangkan peranan XML di dalam MPEG7. Terangkan bagaimana elemen paras rendah dan paras tinggi membantu di dalam teknologi MPEG7...6/-

- 6-4. Berdasarkan gambar rajah di bawah, sila jawab soalan berikut Pertanyaan (sampel baru) Pengkelasifikasian dalam proses capaian sistem maklumat multimedia Berapa kelas yang terdapat di dalam pengkelasifikasian di atas dan namakan kelas tersebut. Diberikan pertanyaan baru (sampel baru) seperti ditunjukkan di dalam gambar rajah di atas. Nyatakan apakah kategori kelas untuk sampel baru bila Teknik KNN digunakan dengan K bersamaan 5. Terangkan bagaimana anda memperoleh jawapan tersebut. Teknik SVM digunakan. Terangkan bagaimana anda memperoleh jawapan tersebut. 5. Terdapat pangkalan data yang mengandungi berbagai jenis bunga berserta maklumat ciri cirinya seperti tinggi, warna, stamen dan lain-lain. Anda di tugaskan untuk membina pengkelasifikasi KNN untuk sistem pengecaman bunga. Jawab soalan berikut. Plotkan geraf pengkelasifikasi (nyatakan andaian anda) Bincangkan terma sampel latihan dan sampel percubaan Bincangkan bagaimana K mempengaruhi keputusan pertanyaan tersebut. 6. Pertimbangkan satu kes sistem capaian maklumat yang direka khusus untuk mencapai perwakilan digital fotograf pandangan udara (aerial photographs) yang digunakan oleh pelukis peta (carthographers) bagi menghasilkan peta dan carta. Anda diminta membangunkan satu reka bentuk teknik capaian (retrieval) dan pengindeksan (indexing) yang mana isu-isu berikut diambil kira dan keputusan pemilihan reka bentuk ini dijustifikasikan, baik dari segi keberkesanan teknikal mahu pun dari sudut kepenggunaan (utility) bagi tujuan yang diharapkan:...7/-

- 7 - Ciri-ciri pengindeksan (indexing features) apakah yang akan anda gunakan? Anda diberi kebebasan untuk memilih ciri-ciri yang diberikan secara manual, ciriciri yang diperoleh secara automatik, atau kombinasi kedua-dua kaedah ini. Bincangkan kemungkinan antara muka pertanyaan yang anda fikirkan sesuai untuk mencapai data fotograf pandangan udara ini. Nyatakan rasional pemilihan reka bentuk antara muka pertanyaan yang anda pilih. 7. Soalan-soalan berikut berkisar tentang topik penilaian capaian maklumat: Apakah perbezaan asas antara panggilan semula (recall) dan kepersisan (precision), dan pada pendapat anda yang mana satukah yang mempunyai ciriciri yang diinginkan (desirable features)? Diberikan R q sebagai set yang mengandungi imej-imej yang berkaitan (relevant) hasil daripada pertanyaan q: R q = {d 3, d 5, d 9, d 25, d 39, d 44, d 56, d 89, d 123} Algoritma capaian berasaskan imej yang anda bangunkan memberi set keputusan berikut mengikut susunan yang berkaitan ke atas pertanyaan q: 1. d 123 6. d 9 11. d 38 2. d 84 7. d 51 12. d 48 3. d 56 8. d 129 13. d 250 4. d 6 9. d 187 14. d 113 5. d 8 10. d 25 15. d 3 Jawab soalan-soalan berikut: (iii) Hitung kepersisan dan panggilan semula bagi 8 set jawapan pertama. Lakar graf kepersisan lawan panggilan semula bagi kesemua set jawapan di atas. Apakah yang boleh anda dapat simpulkan tentang prestasi algoritma capaian imej anda berasaskan graf di atas? 8. Definisikan istilah-istilah berikut. Berikan contoh bagi setiap jawapan anda. Teknologi pengurusan hak milik digital (DRM) Preventif. Teknologi pengurusan hak milik digital (DRM) Reaktif. - ooooooo -