Tìm kiếm ảnh trong tập dữ liệu ảnh lớn dựa trên đặc trưng

B TR NGă GIÁO D CăVÀă ÀOăT O I H C CÔNG NGH TP HCM - LÊ CƠNG KHANH TÌM KI M NH TRONG T P D L N D AăTRểNă LI U NH CăTR NG LU NăV NăTH CăS Chuyên ngành : CÔNG NGH THÔNG TIN Mã s ngành: 60480201 TP H CHÍ MINH, thángă11ăn mă2016 B TR NGă GIÁO D CăVÀă ÀOăT O I H C CÔNG NGH TP HCM - \ LÊ CƠNG KHANH TÌM KI M NH TRONG T P D L N D AăTRểNă LI U NH CăTR NG LU NăV NăTH CăS Chuyên ngành : CÔNG NGH THÔNG TIN Mã s ngành: 60480201 CÁN B H NG D N KHOA H C: TS NGUY N THANH BÌNH TP H CHệăMINH,ăthángă11ăn mă2016 CƠNG TRÌNH TR Cán b h NG C HỒN THÀNH T I I H C CƠNG NGH TP HCM ng d n khoa h c: TS.ăNGUY NăTHANHăBỊNH (Ghi rõ h , tên, h c hàm, h c v ch ký) Lu n v n Th c s đ c b o v t i Tr vào ngày 17 tháng 12 n m 2016 ng i h c Công ngh TP HCM Thành ph n H i đ ng đánh giá Lu n v n Th c s g m: (Ghi rõ h , tên, h c hàm, h c v c a H i đ ng ch m b o v Lu n v n Th c s ) TT đ H tên Ch c danh H i đ ng Ch T ch Ph n bi n Ph n bi n y viên y viên, Th ký Xác nh n c a Ch t ch H i đ ng đánh giá Lu n v n sau Lu n v n đư c s a ch a (n u có) Ch t ch H i đ ng đánh giá Lu n v n TR NG H CÔNG NGH TP HCM C NG HÒA XÃ H I CH NGH A VI T NAM PHÒNG QLKH ậ TS H c l p ậ T ậ H nh phúc TP HCM, ngày … tháng… n m 2016 NHI M V LU NăV NăTH CăS H tên h c viên: Lê Cơng Khanh Gi i tính: Nam NgƠy, tháng, n m sinh: 17-6-1977 N i sinh: Ti n Giang Chuyên ngành: Công Ngh Thông Tin MSHV: 1441860050 I- Tên đ tài: Tìm ki m nh t p d li u nh l n d a đ c tr ng II- Nhi m v n i dung: - Nghiên c u k thu t tìm ki m nh theo n i dung, t đó, đ xu t mơ hình tìm ki m nh t p d li u nh l n d a đ c tr ng nh - Xây d ng h th ng tìm ki m nh t p d li u nh l n d a đ c tr ng nh III- Ngày giao nhi m v : 23/01/2016 IV- Ngày hoàn thành nhi m v : V- Cán b h CÁN B H ng d n: Ti n S Nguy n Thanh Bình NG D N (H tên ch ký) KHOA QU N LÝ CHUYÊN NGÀNH (H tên ch ký) i L IăCAMă OAN Tôi xin cam đoan đơy lƠ cơng trình nghiên c u c a riêng tơi Các s li u, k t qu nêu Lu n v n lƠ trung th c vƠ ch a t ng đ c công b b t k cơng trình khác Tơi xin cam đoan r ng m i s đư đ giúp đ cho vi c th c hi n Lu n v n nƠy c c m n vƠ thơng tin trích d n Lu n v n đư đ c ch rõ ngu n g c H c viên th c hi n Lu n v n Lê Công Khanh ii L IăCỄMă N Tr c h t em xin bày t lòng bi t n sơu s c nh t t i th y giáo h ng d n TS Nguy n Thanh Bình đư t n tình giúp đ em r t nhi u su t trình tìm hi u nghiên c u hồn thành báo cáo lu n v n Em xin chân thành c m n th y cô đư trang b cho em nh ng ki n th c c b n c n thi t đ em có th hồn thành lu n v n nƠy Xin g i l i c m n đ n b n bè nh ng ng i bên em đư đ ng viên t o u ki n thu n l i cho em, t n tình giúp đ ch b o em nh ng em cịn thi u sót trình làm báo cáo lu n v n Cu i em xin bày t lòng bi t n sơu s c t i nh ng ng i thơn gia đình đư giƠnh cho em s quan tơm đ c bi t vƠ đ ng viên em Vì th i gian có h n, trình đ hi u bi t c a b n thân nhi u h n ch Vì v y, đ án khơng tránh kh i nh ng thi u sót, em r t mong nh n đ c s đóng góp Ủ ki n c a t t c th y cô giáo c ng nh b n bè đ lu n v n c a em đ thi n h n Em xin chân thành c m n! Tác gi lu n v n Lê Công Khanh c hồn iii TĨM T T S t ng khơng ng ng v l ng đ ng nh Web t o ngu n nh phong phú đáp c ngu n cung nh cho nhu c u c a ng i M c dù m t s mơ hình tìm ki m nh đư đ i đáp ng ph n nhu c u tìm ki m nh, song nâng cao ch t l ng tìm ki m v n đ đ c đ t Bài tốn tìm ki m nh, nâng cao ch t l ng x p h ng nh đư vƠ nh n đ c s quan tơm đ c bi t tài c a lu n v n: ắTìm ki m nh t p d li u nh l n d a đ c tr ngắ nh m đ gi i quy t toán Nhi m v c a lu n v n lƠ nghiên c u k thu t tìm ki m nh theo n i dung vƠ đ xu t mơ hình tìm ki m nh t p d li u nh l n d a đ c tr ng nh u tiên, lu n v n nêu m t s đ c tr ng c b n c a nh c ng nh m t s nghiên c u liên quan v đ c tr ng nh Ti p theo, lu n v n đ xu t ph ng pháp tìm ki m nh theo n i dung, đ a mơ hình ph i h p đ c tr ng k t h p v i toán t LTP xây d ng gi i thu t truy v n Lu n v n đư đ c hi n th c trình truy v n nh b ng gi i thu t đư đ xu t Quá trình th c nghi m đ đ it c th c hi n nhi u t p dataset khác nhau, ch a ng khác nh ng i, xe, hoa, c nh… t p d li u c a Wang t i đ a ch http://wang.ist.psu.edu/docs/related/ T p d li u bao g m 10.000 nh th nghi m β ph ng pháp: Truy xu t b ng query truy xu t d a ph ng pháp support vector machine (SVM) Qua k t qu th c nghi m, th y r ng ph t t h n ph ng pháp SVM Ph ng pháp đ xu t cho k t qu ng pháp đ xu t đư k t h p đ c tr ng c c b toàn c c l i v i ơy lƠ lỦ gi i thích t i ph ph ng pháp SVM ng pháp đ xu t t t h n iv ABSTRACT The continuous increase in volume images on the web to create images rich source supply to meet the demand picture for the people Although some models were launched image search partly meet the need to look for images, but improve the quality of search is always a problem arises Image search problem and improve image quality ratings have been received special attention The theme of the thesis: "Content-based image retrieval in the large image database based on the characteristic" in order to solve the problem on The task of the thesis is to study the technical content image search and search suggestions model images in large image data sets based on image features Firstly, the thesis outlined some basic characteristics of the image as well as a number of studies related to the image features Secondly, the thesis proposed the method for image searching by contents, making coordination model characteristics associated with LTP and building operators query algorithms Thesis has been realized by the image retrieval algorithm was proposed The processing of this work on many different training dataset, containing various objects such as people, cars, flowers, landscape in the data set of Wang at http://wang.ist.psu.edu/docs/related/ This dataset includes 10,000 images We test on two methods: Retrieve query and retrieval using methods based on support vector machine (SVM) Through experimental results, we found that the proposed method gives better results than SVM method The method propose combining local characteristics and wikis together This is the reason why the proposed method better methods based on SVM method v M CL C L I CAM OAN i L I CÁM N ii TÓM T T iii ABSTRACT iv M C L C v DANH M C T VI T T T vii DANH M C CÁC B NG viii DANH M C CÁC BI U CH , TH , S , HÌNH NH ix NG 1: GI I THI U 1.1 Gi i thi u đ tài 1.2 M c tiêu c a đ tài 1.3 N i dung đ tài 1.4 Gi i h n c a đ tài 1.5 Ph ng pháp nghiên c u 1.6 C u trúc lu n v n CH NG β: C S LÝ THUY T VÀ CÁC NGHIÊN C U LIÊN QUAN 2.1 C s lý thuy t β.1.1 c tr ng mƠu s c .4 β.1.β c tr ng k t c u .10 β.1.γ c tr ng hình d ng 16 2.1.4 Mô t Boundary .16 2.1.5 Mô t theo Vùng (Region) .17 β.β đo t ng đ ng 19 β.β.1 đo v màu s c 19 β.β.β đo v k t c u 20 β.β.γ đo v hình d ng 21 2.3 Các nghiên c u liên quan 24 β.γ.1 Trong n c 24 β.γ.β NgoƠi n c 24 vi CH NG γ: PH NG PHÁP XU T TÌM KI M NH THEO N I DUNG.26 3.1 Yêu c u toán .26 3.2 Mô hình nghiên c u .28 3.2.1 Mơ hình ph i h p đ c tr ng nh 28 3.2.2 K t h p toán t LTP (Local Ternary Pattern) 29 γ.γ Ph ng pháp rút trích đ c tr ng nh truy v n nh 32 3.3.1 Ph i h p đ c tr ng đ truy v n nh 32 3.3.1.1 X lỦ c s d li u 32 3.3.1.2 X lý nh truy v n 32 γ.γ.1.γ o s t ng t gi a véc t nh 32 3.3.1.4 Hi n th k t qu tr v 33 3.3.2 Truy v n nh dùng moments c a LTP 33 3.3.2.1 Moments 33 3.3.2.2 M u tam phân (LTP) Moment 34 γ.γ.β.γ Ph CH ng pháp đ xu t 35 NG 4: K T QU TH C NGHI M 37 4.1 T p d li u th nghi m 38 4.2 K t qu truy v n 39 4.3 Code đ c tr ng 45 CH NG 5: K T LU N 48 5.1 K t qu đ t đ 5.β u m vƠ nh 5.β.1 c .48 c m c a gi i thu t đ xu t 48 u m c a gi i thu t đ xu t 48 5.β.β Nh c m c a gi i thu t đ xu t 48 5.3 óng góp c a lu n v n 48 5.γ.1 óng góp khoa h c 49 5.3.2 óng góp th c ti n 49 5.4 H ng m r ng .49 TÀI LI U THAM KH O 50 42 Hình 4.7 K t qu truy xu t B ng 4.1 K t qu truy xu t nh c a ph S th t nh test S nh trùng th c t Ph ng pháp đ xu t so v i ph ng pháp truy xu t d a SVM Ph ng pháp khác ng pháp đ xu t 12 12 12 10 10 10 21 21 21 14 14 14 15 13 15 5 14 12 14 3 43 6 10 2 11 12 12 12 12 10 10 10 13 21 20 21 14 14 14 14 15 15 13 15 16 5 17 14 12 14 18 3 19 6 20 2 21 2 22 1 23 12 11 12 24 15 15 15 25 11 10 11 26 15 15 15 27 11 11 11 28 9 28 3 30 1 31 12 12 12 32 7 44 33 5 34 12 12 12 35 11 11 11 36 4 37 14 12 14 38 3 39 0 40 1 41 4 42 3 43 1 44 17 17 17 45 11 12 11 46 7 47 10 10 10 48 1 49 9 50 10 11 10 Chúng th nhi u thí nghi m khác Trong khn kh lu n v n này, ch nêu 50 tr ng h p c s d li u 300 nh T k t qu b ng 4.1 nhi u k t qu khác, th y r ng ph h n ph ng pháp SVM Ph toàn c c l i v i ph ng pháp SVM ng pháp đ xu t cho k t qu t t ng pháp đ xu t đư k t h p đ c tr ng c c b ơy lƠ lỦ gi i thích t i ph ng pháp đ xu t t t h n 45 4.3 Code đ c tr ng Hàm truy xu t nh function btn_BrowseImage_Callback(hObject, eventdata, handles) [query_fname, query_pathname] = uigetfile('*.jpg; *.png; *.bmp', 'Select query image'); if (query_fname ~= 0) query_fullpath = strcat(query_pathname, query_fname); imgInfo = imfinfo(query_fullpath); [pathstr, name, ext] = fileparts(query_fullpath); % fiparts returns char type if ( strcmp(lower(ext), '.jpg') == || strcmp(lower(ext), '.png') == || strcmp(lower(ext), '.bmp') == ) queryImage = imread( fullfile( pathstr, strcat(name, ext) ) ); % Truy xu t image features queryImage = imresize(queryImage, [384 256]); if (strcmp(imgInfo.ColorType, 'truecolor') == 1) hsvHist = hsvHistogram(queryImage); autoCorrelogram = colorAutoCorrelogram(queryImage); color_moments = colorMoments(queryImage); % Scale image img = double(rgb2gray(queryImage))/255; [meanAmplitude, msEnergy] = gaborWavelet(img, 4, 6); % = number of scales, = number of orientations 46 wavelet_moments = waveletTransform(queryImage, imgInfo.ColorType); % construct the queryImage feature vector queryImageFeature = [hsvHist autoCorrelogram color_moments meanAmplitude msEnergy wavelet_moments str2num(name)]; elseif (strcmp(imgInfo.ColorType, 'grayscale') == 1) grayHist = imhist(queryImage); grayHist = grayHist/sum(grayHist); grayHist = grayHist(:)'; color_moments = [mean(mean(queryImage)) std(std(double(queryImage)))]; [meanAmplitude, msEnergy] = gaborWavelet(queryImage, 4, 6); % = number of scales, = number of orientations wavelet_moments = waveletTransform(queryImage, imgInfo.ColorType); % construct the queryImage feature vector queryImageFeature = [grayHist color_moments meanAmplitude msEnergy wavelet_moments str2num(name)]; end % update handles handles.queryImageFeature = queryImageFeature; handles.img_ext = ext; handles.folder_name = pathstr; guidata(hObject, handles); helpdlg('Proceed with the query by executing the green button!'); % Clear workspace clear('query_fname', 'query_pathname', 'query_fullpath', 'pathstr', 'name', 'ext', 'queryImage', 'hsvHist', 'autoCorrelogram', 'color_moments', 'img', 'meanAmplitude', 'msEnergy', 'wavelet_moments', 'queryImageFeature', 'imgInfo'); else 47 errordlg('You have not selected the correct file type'); end else return; end 48 CH 5.1 K t qu đ tăđ NGă5:ăK TăLU N c Qua trình th c hi n lu n v n, đư hi u đ c s d li u vƠ sau tìm ph c tính ch t c a nh ng pháp phù h p v i t ng lo i nh i v i nh nhi u ánh sáng tr i ta có th dùng hàm l c đ xóa nh ng pixel b nhi u T đem l i nh ng k t qu r t t t D a cơng trình nghiên c u vƠ ngoƠi n c kho ng th i gian g n đơy, lu n v n đư đ xu t m t gi i thu t truy v n nh d a đ c tr ng c a nh Sau trình th c nghi m nghiên c u lý thuy t, tơi đư có m t vài k t qu kh quan nh : hoƠn thi n nh ng Ủ t ng c ng nh hi n th c đ ki m ch ng th c t tƠi đư ti n hƠnh đánh giá k t qu d a ph đ nh l ng pháp đ nh tính ng, c ng nh ti n hành so sánh k t qu t ng giai đo n v i ph x lý g n đơy đư đ 5.2 ng pháp c đ xu t u m vƠănh căđi m c a gi i thu t đ xu t 5.2.1ă uăđi m c a gi i thu tăđ xu t Gi i quy t đ c toán truy v n nh d a đ c tr ng c a nh, giúp ích cho q trình tìm ki m nh K t qu thu đ c đư c i thi n đ c ph n ch t l ng tìm ki m nh 5.2.2ăNh căđi m c a gi i thu tăđ xu t M c dù gi i quy t đ c vi c tìm ki m nh, nh ng d a trình xây d ng thu t gi i c ng nh th c nghi m v n t n t i m t s v n đ sau đơy mƠ có th xem nh lƠ nh c m c a đ tài: - Gi i thu t ch m i x lý v i nh s , nh 2D - T p d li u nh th nghi m h n ch m t s nguyên nhân h n ch thu th p ngu n d li u nh m u - Ch a tính đ n t c đ x lỦ c ng nh đ ph c t p c a gi i thu t 5.3 óng góp c a lu năv n 49 5.3.1 óngăgópăkhoaăh c tƠi đư đóng góp: - Lý thuy t v lo i nh - Lý thuy t v ph - tƠi đ xu t đ ng pháp truy v n nh c m t gi i thu t k t h p đ c tr ng c c b toàn c c v i đ truy v n nh -T ođ c m t tài li u tham kh o t t cho nh ng quan tơm đ n l nh v c x lý nh 5.3.2 óngăgópăth c ti n tƠi đư ti n hành tìm hi u đ đ c tr ng c b n c a m t nh đư đ c ph ng pháp truy v n nh ph bi n Các c nêu rõ c ng nh yêu c u c b n truy v n nh, không làm m t mát thông tin c a nh 5.4 H ng m r ng Do trình thu th p d li u m u nh t nhiên g p nhi u khó kh n nên s l ng nh h n ch , đ có th kh ng đ nh k t qu gi i thu t m t cách tri t đ h n vi c b sung thêm t p d li u m u Không nh ng th , vi c b sung s l ng nh v n c n b sung thêm vi c đa d ng v th lo i nh kích c Gi i thu t v n t n t i h n ch ch gi i quy t nh nh 2D, nên v n đ đ t kh c ph c 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