摘要:
The present invention relates to an image background modeling and foreground extraction method based on a depth image, characterized by comprising: step 1: acquiring a depth image representing a distance from objects to a camera; step 2: initiating a real-time depth background model; step 3: updating the real-time depth background model; step 4: acquiring a current depth image representing the distance from the objects to the camera; step 5: extracting a foreground image of the current depth image based on the real-time depth background model; step 6: outputting the foreground image and generating a real-time target masking image; and step 7: updating the real-time depth background model, where code block information of each pixel point in the real-time depth background model is updated according to the real-time target masking image. The present invention has stability, high efficiency, and superiority in processing positional relationships that cannot be matched by a well-known modeling method using a color image, and does not require initially modeling a scene, thereby simplifying implementation steps and greatly improving the whole performance.
摘要:
A method of reducing processing time when assigning geographic areas to land cover labels using satellite sensor values includes a processor receiving a feature value for each pixel in a time series of frames of satellite sensor values, each frame containing multiple pixels and each frame covering a same geographic location. For each sub-area of the geographic location, the sub-area is assigned to one of at least three land cover labels. The processor determines a fraction function for a first sub-area assigned to a first land cover label. The sub-areas that were assigned to the first land cover label are reassigned to one of the second land cover label and the third land cover label based on the fraction functions of the sub-areas.
摘要:
Various methods and systems are provided for adaptive background estimation. In one embodiment, among others, a signal processing device includes at least one processing unit and a memory storing a background estimation system executable in the at least one processing unit. The background estimation system, when executed, causes the signal processing device to separate foreground objects from at least one image frame in a sequence of image frames based at least in part upon a correntropy cost function. In another embodiment, a method includes obtaining an image frame from a sequence of image frames; performing correntropy filtering on the image frame to separate foreground objects from the image frame; and providing the foreground objects for rendering. The correntropy filtering may adapt to compensate for diffusion effects in the image frame.
摘要:
An image processing apparatus has: a segmenting unit for segmenting an input image into a plurality of areas on the basis of a similarity of pixels; an acquiring unit for acquiring sizes of the segmented areas; a selecting unit for selecting one of a plurality of discriminating methods of discriminating, with respect to adjacent areas among the plurality of areas, on the basis of an acquired size of each of the adjacent areas, whether or not the adjacent areas are connecting targets by using different kinds of features; an extracting unit for extracting, from the adjacent areas, the feature of the kind which is used in the selected discriminating method; a connecting unit for connecting the adjacent areas determined as the connecting targets by the selected discriminating method; and a classifying unit for classifying a kind of connected area.
摘要:
Disclosed are various embodiments labeling objects using multi-scale partitioning, rare class expansion, and/or spatial context techniques. An input image may be partitioned using different scale values to produce a different set of superpixels for each of the different scale values. Potential object labels for superpixels in each different set of superpixels of the input image may be assessed by comparing descriptors of the superpixels in each different set of superpixels of the input image with descriptors of reference superpixels in labeled reference images. An object label may then be assigned for a pixel of the input image based at least in part on the assessing of the potential object labels.
摘要:
A method of assisting visual exploration for individuals suffering from a retinal condition resulting in a scotoma and, more particularly, a method S for assisting visual exploration by such an individual of a digital image on a display device, the method including:—recognizing, using shape recognition software, at least one object contained in an object area of the digital image,—determining a blind area in the image, corresponding to a position of the scotoma in the field of vision of the user looking at the image,—if the blind area and the object area are detected to be in close proximity to each other, applying image processing to the image consisting in highlighting the object area for the user.
摘要:
Disclosed is an ultrasound image processing method. The ultrasound image processing method includes generating an ultrasound image indicating a region of interest (ROI) by using echo signals which corresponds to ultrasound waves irradiated onto the ROI, sequentially setting respective indexes in a plurality of blood flows included in the ROI detected based on the ultrasound image, determining blood flow corresponding to a selected index, based on an external signal for selecting one of the set indexes, and displaying information corresponding to the determined blood flow.
摘要:
An apparatus for providing a motion-corrected time series of image data sets, comprises an image selection unit for obtaining a series of sets of image data, each set of image data representative of a region at a different time, and for automatically determining a sub-region of interest, and a registration unit that is configured to, for each of a plurality of sets of image data in the series, perform a registration, for the sub-region of interest, to register one of a reference data set of the series and the set of image data to the other of that reference data set and the set of image data.
摘要:
The system and method of the invention combines target image intensity into a maximum likelihood estimate (MLE) framework as in STAPLE to take advantage of both intensity-based segmentation and statistical label fusion based on atlas consensus and performance level, abbreviated iSTAPLE. The MLE framework is then solved using a modified expectation-maximization algorithm to simultaneously estimate the intensity profiles of structures of interest as well as the true segmentation and atlas performance level. The iSTAPLE greatly extends the use of atlases such that the target image need not have the same image contrast and intensity range as the atlas images.
摘要:
An exemplary region growing method include at least the following steps: selecting a seed point of a current frame as an initial growing point of a region in the current frame; determining a background confidence value at a neighboring pixel around the seed point; and utilizing a processing unit for checking if the neighboring pixel is allowed to be included in the region according to at least the background confidence value.