IEEE Trans Image Process - Estimation of sunlight direction using 3D object models.

Tópicos

{ featur(1941) imag(1645) propos(1176) }
{ motion(1329) object(1292) video(1091) }
{ perform(999) metric(946) measur(919) }
{ state(1844) use(1261) util(961) }
{ can(774) often(719) complex(702) }
{ imag(1057) registr(996) error(939) }
{ control(1307) perform(991) simul(935) }
{ method(1219) similar(1157) match(930) }
{ structur(1116) can(940) graph(676) }
{ method(2212) result(1239) propos(1039) }
{ model(2341) predict(2261) use(1141) }
{ process(1125) use(805) approach(778) }
{ model(3404) distribut(989) bayesian(671) }
{ sequenc(1873) structur(1644) protein(1328) }
{ imag(2675) segment(2577) method(1081) }
{ learn(2355) train(1041) set(1003) }
{ care(1570) inform(1187) nurs(1089) }
{ system(1050) medic(1026) inform(1018) }
{ first(2504) two(1366) second(1323) }
{ can(981) present(881) function(850) }
{ use(976) code(926) identifi(902) }
{ activ(1452) weight(1219) physic(1104) }
{ measur(2081) correl(1212) valu(896) }
{ featur(3375) classif(2383) classifi(1994) }
{ assess(1506) score(1403) qualiti(1306) }
{ framework(1458) process(801) describ(734) }
{ problem(2511) optim(1539) algorithm(950) }
{ error(1145) method(1030) estim(1020) }
{ clinic(1479) use(1117) guidelin(835) }
{ design(1359) user(1324) use(1319) }
{ method(984) reconstruct(947) comput(926) }
{ howev(809) still(633) remain(590) }
{ import(1318) role(1303) understand(862) }
{ studi(1119) effect(1106) posit(819) }
{ spatial(1525) area(1432) region(1030) }
{ sampl(1606) size(1419) use(1276) }
{ health(1844) social(1437) communiti(874) }
{ estim(2440) model(1874) function(577) }
{ imag(1947) propos(1133) code(1026) }
{ data(1737) use(1416) pattern(1282) }
{ inform(2794) health(2639) internet(1427) }
{ system(1976) rule(880) can(841) }
{ bind(1733) structur(1185) ligand(1036) }
{ imag(2830) propos(1344) filter(1198) }
{ network(2748) neural(1063) input(814) }
{ patient(2315) diseas(1263) diabet(1191) }
{ take(945) account(800) differ(722) }
{ studi(2440) review(1878) systemat(933) }
{ treatment(1704) effect(941) patient(846) }
{ surgeri(1148) surgic(1085) robot(1054) }
{ chang(1828) time(1643) increas(1301) }
{ concept(1167) ontolog(924) domain(897) }
{ algorithm(1844) comput(1787) effici(935) }
{ extract(1171) text(1153) clinic(932) }
{ method(1557) propos(1049) approach(1037) }
{ data(1714) softwar(1251) tool(1186) }
{ model(2220) cell(1177) simul(1124) }
{ general(901) number(790) one(736) }
{ search(2224) databas(1162) retriev(909) }
{ case(1353) use(1143) diagnosi(1136) }
{ data(3963) clinic(1234) research(1004) }
{ studi(1410) differ(1259) use(1210) }
{ risk(3053) factor(974) diseas(938) }
{ research(1085) discuss(1038) issu(1018) }
{ visual(1396) interact(850) tool(830) }
{ compound(1573) activ(1297) structur(1058) }
{ perform(1367) use(1326) method(1137) }
{ blood(1257) pressur(1144) flow(957) }
{ record(1888) medic(1808) patient(1693) }
{ health(3367) inform(1360) care(1135) }
{ model(3480) simul(1196) paramet(876) }
{ monitor(1329) mobil(1314) devic(1160) }
{ ehr(2073) health(1662) electron(1139) }
{ research(1218) medic(880) student(794) }
{ patient(2837) hospit(1953) medic(668) }
{ model(2656) set(1616) predict(1553) }
{ data(2317) use(1299) case(1017) }
{ age(1611) year(1155) adult(843) }
{ medic(1828) order(1363) alert(1069) }
{ signal(2180) analysi(812) frequenc(800) }
{ cost(1906) reduc(1198) effect(832) }
{ group(2977) signific(1463) compar(1072) }
{ gene(2352) biolog(1181) express(1162) }
{ data(3008) multipl(1320) sourc(1022) }
{ intervent(3218) particip(2042) group(1664) }
{ activ(1138) subject(705) human(624) }
{ time(1939) patient(1703) rate(768) }
{ patient(1821) servic(1111) care(1106) }
{ use(2086) technolog(871) perceiv(783) }
{ analysi(2126) use(1163) compon(1037) }
{ high(1669) rate(1365) level(1280) }
{ cancer(2502) breast(956) screen(824) }
{ use(1733) differ(960) four(931) }
{ drug(1928) target(777) effect(648) }
{ result(1111) use(1088) new(759) }
{ implement(1333) system(1263) develop(1122) }
{ survey(1388) particip(1329) question(1065) }
{ decis(3086) make(1611) patient(1517) }
{ method(1969) cluster(1462) data(1082) }
{ detect(2391) sensit(1101) algorithm(908) }

Resumo

The direction of sunlight is an important informative cue in a number of applications in image processing, such as augmented reality and object recognition. In general, existing methods to estimate the direction of the sunlight rely on different image features (e.g., sky, texture, shadows, and shading). These features can be considered as weak informative cues as no single feature can reliably estimate the sunlight direction. Moreover, existing methods may require that the camera parameters are known limiting their applicability. In this paper, we present a new method to estimate the sunlight direction from a single (outdoor) image by inferring casts shadows through object modeling and recognition. First, objects (e.g., cars or persons) are first (automatically) recognized in images by exemplar-SVMs. Instead of training the Support Vector Machine (SVMs) using natural images (limited variation in viewpoints), we propose to train on 2D object samples generated from 3D object models. Then, the recognized objects are used as sundial cues (probes) to estimate the sunlight direction by inferring the corresponding shadows generated by 3D object models considering different illumination directions. We demonstrate the effectiveness of our approach on synthetic and real images. Experiments show that our method estimates the azimuth angle accurately within a quadrant (smaller than 45?) and compute the zenith angle with mean angular error of 23?.

Resumo Limpo

direct sunlight import inform cue number applic imag process augment realiti object recognit general exist method estim direct sunlight reli differ imag featur eg sky textur shadow shade featur can consid weak inform cue singl featur can reliabl estim sunlight direct moreov exist method may requir camera paramet known limit applic paper present new method estim sunlight direct singl outdoor imag infer cast shadow object model recognit first object eg car person first automat recogn imag exemplarsvm instead train support vector machin svms use natur imag limit variat viewpoint propos train d object sampl generat d object model recogn object use sundial cue probe estim sunlight direct infer correspond shadow generat d object model consid differ illumin direct demonstr effect approach synthet real imag experi show method estim azimuth angl accur within quadrant smaller comput zenith angl mean angular error

Resumos Similares

IEEE Trans Image Process - Low-resolution face tracker robust to illumination variations. ( 0,740077644334425 )
IEEE Trans Pattern Anal Mach Intell - Spatially-Constrained Similarity Measure for Large-Scale Object Retrieval. ( 0,737599772281895 )
IEEE Trans Pattern Anal Mach Intell - Pose-Robust Recognition of Low-Resolution Face Images. ( 0,723638199901203 )
IEEE Trans Image Process - Learning-based prediction of visual attention for video signals. ( 0,714724985894392 )
IEEE Trans Pattern Anal Mach Intell - CENTRIST: A Visual Descriptor for Scene Categorization. ( 0,709438245399087 )
IEEE Trans Image Process - Fine-tuning regression forests votes for object alignment in the wild. ( 0,706201782305114 )
IEEE Trans Image Process - The segmentation of 3D images using the random walking technique on a randomly created image adjacency graph. ( 0,702061807533977 )
IEEE Trans Pattern Anal Mach Intell - Probabilistic Models for Inference about Identity. ( 0,696020443264656 )
IEEE Trans Image Process - Geodesic invariant feature: a local descriptor in depth. ( 0,692868274048339 )
Neural Comput - Invariant object recognition and pose estimation with slow feature analysis. ( 0,687639863557215 )
Int J Neural Syst - Retrieval of noisy fingerprint patterns using metric attractor networks. ( 0,687420825295134 )
IEEE Trans Image Process - Coupled kernel embedding for low resolution face image recognition. ( 0,684984448342176 )
IEEE Trans Image Process - Learning dynamic hybrid Markov random field for image labeling. ( 0,676032327921374 )
IEEE Trans Image Process - Discovering thematic objects in image collections and videos. ( 0,670957444724393 )
IEEE Trans Image Process - Video tonal stabilization via color states smoothing. ( 0,669449001727603 )
IEEE Trans Pattern Anal Mach Intell - Object Tracking by Oversampling Local Features. ( 0,667678479890918 )
IEEE Trans Pattern Anal Mach Intell - Effective Unconstrained Face Recognition by Combining Multiple Descriptors and Learned Background Statistics. ( 0,666721523753744 )
IEEE Trans Image Process - Pose-invariant face recognition using Markov random fields. ( 0,666536859990673 )
IEEE Trans Pattern Anal Mach Intell - Learning Actionlet Ensemble for 3D Human Action Recognition. ( 0,666489803932953 )
IEEE Trans Image Process - Rigid-motion-invariant classification of 3-D textures. ( 0,665182242926422 )
IEEE Trans Image Process - Representing and retrieving video shots in human-centric brain imaging space. ( 0,66495723677692 )
IEEE Trans Image Process - Multilayer surface albedo for face recognition with reference images in bad lighting conditions. ( 0,66291730603038 )
IEEE Trans Image Process - Texture classification using dominant neighborhood structure. ( 0,660159763627481 )
IEEE Trans Image Process - Generalized random walks for fusion of multi-exposure images. ( 0,659073075101717 )
IEEE Trans Image Process - Human gait recognition using patch distribution feature and locality-constrained group sparse representation. ( 0,6586970207218 )
IEEE Trans Image Process - Image classification via object-aware holistic superpixel selection. ( 0,658625426414308 )
IEEE Trans Pattern Anal Mach Intell - LDAHash: Improved Matching with Smaller Descriptors. ( 0,658246690817206 )
IEEE Trans Image Process - Enhanced local texture feature sets for face recognition under difficult lighting conditions. ( 0,654773320325082 )
IEEE Trans Pattern Anal Mach Intell - Learning Hybrid Image Templates (HIT) by Information Projection. ( 0,654516383875099 )
IEEE Trans Image Process - Boosting color feature selection for color face recognition. ( 0,653218989252872 )
IEEE Trans Image Process - Wavelet domain multifractal analysis for static and dynamic texture classification. ( 0,651668957412681 )
IEEE Trans Pattern Anal Mach Intell - Unconstrained Pose-Invariant Face Recognition Using 3D Generic Elastic Models. ( 0,651165547172944 )
J Med Syst - Comparison of several texture features for tumor detection in CE images. ( 0,649927734175096 )
IEEE Trans Image Process - A feature-based learning framework for accurate prostate localization in CT images. ( 0,648769519540305 )
IEEE J Biomed Health Inform - Thermal imaging as a biometrics approach to facial signature authentication. ( 0,645620780908136 )
IEEE Trans Image Process - Scale- and affine-invariant fan feature. ( 0,645003624212235 )
IEEE Trans Image Process - Common feature discriminant analysis for matching infrared face images to optical face images. ( 0,642832249717177 )
IEEE Trans Image Process - Color constancy by category correlation. ( 0,642296290758746 )
IEEE Trans Image Process - A probabilistic approach for color correction in image mosaicking applications. ( 0,642154834107384 )
IEEE Trans Image Process - Image editing with spatiograms transfer. ( 0,641922077427138 )
IEEE Trans Image Process - Non-uniform deblurring in HDR image reconstruction. ( 0,640760179316102 )
IEEE Trans Image Process - Multilinear supervised neighborhood embedding of a local descriptor tensor for scene/object recognition. ( 0,640040551830858 )
IEEE Trans Pattern Anal Mach Intell - Silhouette Segmentation in Multiple Views. ( 0,639780714626297 )
IEEE Trans Image Process - Illumination compensation using oriented local histogram equalization and its application to face recognition. ( 0,638384217468197 )
IEEE Trans Image Process - Scale-invariant features and polar descriptors in omnidirectional imaging. ( 0,636647469514002 )
Comput. Biol. Med. - Automatic colposcopy video tissue classification using higher order entropy-based image registration. ( 0,634776351390406 )
IEEE Trans Image Process - Object segmentation of database images by dual multiscale morphological reconstructions and retrieval applications. ( 0,633683042198229 )
IEEE Trans Pattern Anal Mach Intell - Hidden Part Models for Human Action Recognition: Probabilistic versus Max Margin. ( 0,633549981990492 )
IEEE Trans Image Process - A multisize superpixel approach for salient object detection based on multivariate normal distribution estimation. ( 0,631422464699259 )
IEEE Trans Image Process - Scale- and rotation-invariant local binary pattern using scale-adaptive texton and subuniform-based circular shift. ( 0,62965197382018 )
IEEE Trans Image Process - Local color vector binary patterns from multichannel face images for face recognition. ( 0,629507906441354 )
IEEE Trans Pattern Anal Mach Intell - The Applicability of Spatiotemporal Oriented Energy Features to Region Tracking. ( 0,628912536533749 )
IEEE Trans Image Process - Semisupervised multiview distance metric learning for cartoon synthesis. ( 0,628816434567272 )
IEEE Trans Image Process - Robust face representation using hybrid spatial feature interdependence matrix. ( 0,628607030360974 )
IEEE Trans Image Process - Combining LBP difference and feature correlation for texture description. ( 0,62724131629954 )
IEEE Trans Image Process - Structural texture similarity metrics for image analysis and retrieval. ( 0,625272419464103 )
IEEE Trans Image Process - Flip-invariant SIFT for copy and object detection. ( 0,624844567131028 )
IEEE Trans Pattern Anal Mach Intell - Detailed 3D Representations for Object Recognition and Modeling. ( 0,624351585811447 )
IEEE Trans Image Process - Vehicle detection in aerial surveillance using dynamic Bayesian networks. ( 0,622454943212838 )
IEEE Trans Image Process - Coupled binary embedding for large-scale image retrieval. ( 0,62222233008244 )
Comput. Biol. Med. - Serial slice image segmentation of digital human based on adaptive geometric active contour tracking. ( 0,620994050521942 )
IEEE Trans Image Process - Fusing local patterns of Gabor magnitude and phase for face recognition. ( 0,620786472276494 )
IEEE Trans Pattern Anal Mach Intell - Toward Development of a Face Recognition System for Watchlist Surveillance. ( 0,618079394432637 )
Med Biol Eng Comput - Object-shape recognition and 3D reconstruction from tactile sensor images. ( 0,618033672174258 )
Comput Methods Programs Biomed - Automatic real-time detection of endoscopic procedures using temporal features. ( 0,617510303609554 )
IEEE Trans Image Process - Normalization of face illumination based on large-and small-scale features. ( 0,616561483834482 )
IEEE Trans Image Process - Accurate moving cast shadow suppression based on local color constancy detection. ( 0,615550955834793 )
IEEE Trans Image Process - Adaptive color feature extraction based on image color distributions. ( 0,615445251727893 )
IEEE Trans Pattern Anal Mach Intell - Efficient Subframe Video Alignment using Short Descriptors. ( 0,614806973042646 )
IEEE Trans Image Process - Accurate Iris Recognition at a Distance Using Stabilized Iris Encoding and Zernike Moments Phase Features. ( 0,614229485675156 )
IEEE Trans Image Process - Discovering discriminative graphlets for aerial image categories recognition. ( 0,611972556757814 )
IEEE Trans Image Process - HSOG: a novel local image descriptor based on histograms of the second-order gradients. ( 0,611799989502341 )
IEEE Trans Image Process - Multiscale distance matrix for fast plant leaf recognition. ( 0,611747371057403 )
IEEE Trans Image Process - Angular pattern and binary angular pattern for shape retrieval. ( 0,610959187943422 )
IEEE Trans Image Process - Local directional number pattern for face analysis: face and expression recognition. ( 0,609748601647081 )
IEEE Trans Image Process - Automatic dynamic texture segmentation using local descriptors and optical flow. ( 0,609639994237392 )
IEEE Trans Pattern Anal Mach Intell - Learning Discriminant Face Descriptor. ( 0,609447727123005 )
IEEE Trans Vis Comput Graph - Reconstructing the Curve-Skeletons of 3D Shapes Using the Visual Hull. ( 0,608956891378125 )
IEEE Trans Image Process - Extracting multiple features in the CID color space for face recognition. ( 0,608898330429415 )
IEEE Trans Neural Netw Learn Syst - Learning a Probabilistic Topology Discovering Model for Scene Categorization. ( 0,608703841693944 )
IEEE Trans Pattern Anal Mach Intell - From Bits to Images: Inversion of Local Binary Descriptors. ( 0,607764164863887 )
IEEE Trans Image Process - Fast localization of the optic disc using projection of image features. ( 0,607722626494421 )
IEEE Trans Image Process - A completed modeling of local binary pattern operator for texture classification. ( 0,607687087296416 )
Comput Methods Programs Biomed - Texture and moments-based classification of the acrosome integrity of boar spermatozoa images. ( 0,607469088848055 )
IEEE Trans Pattern Anal Mach Intell - Shape Analysis of Elastic Curves in Euclidean Spaces. ( 0,607127838984533 )
IEEE Trans Image Process - Weighted color and texture sample selection for image matting. ( 0,606624158188135 )
IEEE Trans Pattern Anal Mach Intell - What Makes a Photograph Memorable? ( 0,605945099304125 )
IEEE Trans Pattern Anal Mach Intell - Intensity-Based Image Registration by Nonparametric Local Smoothing. ( 0,6057655996573 )
IEEE Trans Image Process - Color texture classification using shortest paths in graphs. ( 0,605163829939081 )
IEEE Trans Image Process - Shape vocabulary: a robust and efficient shape representation for shape matching. ( 0,604839050534461 )
IEEE Trans Image Process - Hierarchical colorant-based direct binary search halftoning. ( 0,604455562602039 )
IEEE Trans Pattern Anal Mach Intell - Pose and Expression Independent Facial Landmark Localization Using Dense-SURF and the Hausdorff Distance. ( 0,603857257216393 )
IEEE Trans Image Process - Scale-invariant features for 3-D mesh models. ( 0,603747127924408 )
IEEE Trans Image Process - Sparse color interest points for image retrieval and object categorization. ( 0,603194682426365 )
IEEE Trans Vis Comput Graph - Learning a 3D Human Pose Distance Metric from Geometric Pose Descriptor. ( 0,603102461023562 )
IEEE Trans Image Process - Image inpainting by patch propagation using patch sparsity. ( 0,602940750439812 )
IEEE Trans Image Process - Face recognition system using multiple face model of hybrid Fourier feature under uncontrolled illumination variation. ( 0,602418090870443 )
Med Biol Eng Comput - Effects of framing coil shape, orientation, and thickness on intra-aneurysmal flow. ( 0,601213488228306 )
Methods Inf Med - A novel anisotropic fast marching method and its application to blood flow computation in phase-contrast MRI. ( 0,599988701452631 )
Artif Intell Med - Scattering features for lung cancer detection in fibered confocal fluorescence microscopy images. ( 0,599909468894293 )