Abstract:
The present disclosure provides systems and methods that are configured for feature extraction or object recognition using compressive measurements that represent a compressed image of a scene. In various aspects, a compressive sensing matrix is constructed and used to acquire the compressive measurements, such that in the extraction phase, the compressive measurements can be processed to detect feature points and determine their feature vectors in the scene without using a pixel representation of the scene. The determined feature vectors are used to detect objects based on comparison with one or more predetermined feature vectors.
Abstract:
Methods and apparatus for enhancing optical images and parametric databases are disclosed. In an exemplary embodiment, a method includes identifying an image and deconstructing the image into a frequency-based spatial domain representation utilizing a pyramidal data structure including a plurality of levels on a frequency-by-frequency basis. The method also includes modifying the frequency-based spatial domain representation to generate a modified frequency-based spatial domain representation, reconstructing an enhanced image from the modified frequency-based spatial domain representation, and returning the enhanced image. In an exemplary embodiment, an apparatus includes a deconstructor that deconstructs an image into a frequency-based spatial domain representation utilizing a pyramidal data structure including a plurality of levels on a frequency-by-frequency basis and a modifier that modifies the frequency-based spatial domain representation to generate a modified representation. The apparatus also includes a reconstructor that reconstructs an enhanced image from the modified representation and returns the enhanced image.
Abstract:
Described herein is a system and method of controlling real-time image-guided adaptive radiation treatment of at least a portion of a region of a patient. The computer-implemented method comprises obtaining a plurality of real-time image data corresponding to 2-dimensional (2D) magnetic resonance imaging (MRI) images including at least a portion of the region, performing 2D motion field estimation on the plurality of image data, approximating a 3- dimensional (3D) motion field estimation, including applying a conversion model to the 2D motion field estimation, determining at least one real-time change of at least a portion of the region based on the approximated 3D motion field estimation, and controlling the treatment of at least a portion of the region using the determined at least one change.
Abstract:
The invention relates to an image processing apparatus (100) for processing a digital image, the digital image comprising a reference block and a plurality of further blocks, the image processing apparatus (100) comprising a determiner (101) being configured to determine a plurality of similarity measures between the reference block and the plurality of further blocks, wherein each similarity measure indicates a similarity between a noise distribution in the reference block and a noise distribution in a further block of the plurality of further blocks, the determiner (101) being further configured to determine a plurality of similar blocks from the plurality of further blocks upon the basis of the plurality of similarity measures.
Abstract:
L'invention concerne un procédé de restauration d'image numérique comportant des artefacts de compression, une dite image numérique étant représentée par au moins une matrice bidimensionnelle d'échantillons d'image dans un domaine spatial. Ce procédé comporte les étapes suivantes, appliquées à une image numérique d'entrée : application (40) d'une transformation à ladite image numérique d'entrée pour obtenir une image numérique transformée, représentée dans un domaine transformé par une pluralité de blocs de coefficients, chaque bloc de coefficients correspondant à un bloc d'échantillons d'image, et, pour au moins un coefficient traité d'un bloc de coefficients : calcul (46) d'un seuil de bruit en fonction d'une valeur représentative d'un modèle de bruit d'acquisition d'image associé audit coefficient traité ou audit bloc de coefficients, comparaison (50) de la valeur absolue dudit coefficient traité au seuil de bruit, et, lorsque ladite valeur absolue du coefficient traité est inférieure audit seuil de bruit, remplacement (52) dudit coefficient traité par une valeur de bruit dépendant de ladite valeur représentative d'un modèle de bruit d'acquisition d'image.
Abstract:
A user location system (ULS) can use images captured from at least one camera of an electronic device, such as a mobile device, to determine location of a user in an environment, such as in a cabin of a vehicle. The determined location of the user can then be used as an input to control of at least one aspect of the environment. In the case of a vehicle, such input may be used to facilitate control of speed, safety features, climate, and/or audio playback, for example.
Abstract:
오브젝트 인식 장치, 분류 트리 학습 장치 및 그 동작 방법이 개시된다. 오브젝트 인식 장치는, 분석 대상에 대한 깊이 영상을 입력 받는 입력부; 및 분류 트리를 이용하여 상기 깊이 영상으로부터 상기 분석 대상의 비져블 오브젝트 파트 및 상기 분석 대상의 히든 오브젝트 파트를 인식하는 처리부를 포함할 수 있다.