133-MEGAPIXEL1 MICRON PIXELS1st and 2nd FM generation 3D halftoning100 Hue test108 Megapixel1/f noise1-bit matrix completion180 degree images
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2D and 3D video2D-plus-depth video2D to Hologram conversion2D metrics2-d scale2.5D reconstruction2D DCT2D VIEWS2-D barcodes2D-TO-3D CONVERSION ARTIFACTS2D printing2D2.5D2AFC2.5D printing2D AND 3D CONVERTIBLE DISPLAY2.5 D printing2x2 On-chip Lens2D/3D imaging, high performance computing, imaging systems, efficient computations and storage2.5D PRINTING
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360-video360-degree video streaming3D depth-map3D/4D Data Processing and Filtering360VR3D mapping and localization3D objects3D warping3D scene classification3D video processing3D optical scans3D data processing3D surface3D Saliency3D Gaussian Splatting3D image3D Telepresence3D Data Processing3D-shooting3D position measurement of people3DLUT3D DIGITIZATION METHOD FOR OIL PAINTINGS3D theater program listing3D Measurement3D refinement3D-color perception3D display3D mesh3D shape indexing and retrieval3D perception360 panorama3D stereo vision360-degree image projection360 degrees video360-degree art exhibition3D CAMERAS3D video3D-LUT3D/4D Scanning3D MODEL3D face alignment3D PRINTING360-degree images3D Object Detection3D Morphable Model3D affine transformation3D Point Cloud3D Printing3D recovery3D modelling3D capture3D Mapping3D scanning3D Range Data Compression360 degree images3D PRINTER3D shape360-degree content3D Communications3D printing3D depth sensing360° video3D Curvelet3ARRI footage3D range scanning3D HALFTONING360 IMAGING3D Vision3D Immersion3D digital halftoning3D RECONSTRUCTION3D rigid transformations3D modeling3D/2D Visuals3D skeletal joint point cloud; deep learning; PointNet++ method3D Modeling3D STACK3D surface reproduction3D Range Data360-degree Image3D Imaging3D compression3D model3D TRANSFORMATION3D adaptive halftoning3D-HEVC3D camera3D Data Sources3D Halftoning3D Digital Image Correlation3D image compression3D Tracking3D EDUCATIONAL MATERIAL3D Shape Indexing and Retrieval3D/4D DATA PROCESSING AND FILTERING3D Video Communications3D connected tube model3D scene flow estimation360-degree videos3D cinema and TV360-Degree Video Technology3D PROFILE3D TV3D USER INTERFACES3D DISPLAY3D visual representation3D-high efficiency video coding3A ALGORITHMS360 Video3d mapping360x3D scene capture3-D SHAPE RECOVERY3D surface structure based halftoning3D glasses3D COMPRESSION AND ENCRYPTION3D encoding3D3DGS3D vision3D IMAGE3D STIMULI3A Algorithms3d video3d3D Range Data Encoding3D-printing3D Color Printing360-degree imaging3D CG Image3D Reconstruction3D-assisted features3D localization3D/4D SCANNING3D mesh simplification35MM FILM DIGITIZATION3D projector3D point cloud3D human-centered technologies3D-Anisotropic smoothing3DCNN3D Scene Reconstruction and Modeling3D printer3D RECOVERY3D Photogrammetry3D audio3D imaging3D ACQUISITION ARCHITECTURE360° VIDEO3D INTERACTION3D range geometry3D localization and mapping3D digitization and dissemination3D Print Appearance3D colour Digital Image Correlation3D SHAPE INDEXING AND RETRIEVAL3D SCENE RECONSTRUCTION AND MODELING3D and 2D3D halftoning3D print3D Video3-T pixel3D recursive search3D-human body detection3D SALIENCY3D Meshes3D Computer Graphics3D Compression3D object shape3D Models3-D RECONSTRUCTION3D MODELLING3d localization3D Image Processing3D RANGE IMAGING3D Quality3D Video Conferencing360-deg quality assessment360-DEGREE IMAGE3D shape analysis3D displays3DViewers3D communications360-degree video3DSR3D Gaussian splatting3D MESHES3D Display360-degree3D reconstruction3DMM3D VISUALIZATION3D Compression and Encryption3D-CNN3D Lidar3D Scene Reconstruction3D MESH3D Iterative Halftoning360° STEREO PANORAMAS
Captchas are used on many websites in the Internet to prevent automated web requests. Likewise, marketplaces in the darknet commonly use captchas to secure themselves against DDoS attacks and automated web scrapers. This complicates research and investigations regarding the content and activity of darknet marketplaces.
In this work we focus on the darknet and provide an overview about the variety of captchas found in darknet marketplaces. We propose a workflow and recommendations for building automated captcha solvers and present solvers based on machine learning models for 5 different captcha types we found. With our solvers we were able to achieve accuracies between 65% and 99% which significantly improved our ability to collect data from the corresponding marketplaces with automated web scrapers.