This paper describes an extension to the graph cut interactive image segmentation algorithm based on a novel approach to addressing the well known small cut problem. The approach uses a generative contrast model to we...
详细信息
ISBN:
(纸本)9781479923427
This paper describes an extension to the graph cut interactive image segmentation algorithm based on a novel approach to addressing the well known small cut problem. The approach uses a generative contrast model to weight interaction potentials. The model attempts to capture the expected changes in color between adjacent pixels in the unlabeled area of the image using the adjacent pixels in the user interactions as training data. We compare our approach to the standard graph cuts algorithm and show that the contrast model allows a user to achieve a more accurate segmentation with fewer interactions. We additionally introduce a variant of the approach based on superpixels that further enhances performance but reduces computational complexity to ensure instant feedback for optimal user experience.
This paper presents a novel vision system design for the Rubik's cube *** vision system is implemented on an ARM9 *** s3c2440 development board was cut to meet hardware system,including the core-board,the bottom b...
详细信息
ISBN:
(纸本)9781457702686
This paper presents a novel vision system design for the Rubik's cube *** vision system is implemented on an ARM9 *** s3c2440 development board was cut to meet hardware system,including the core-board,the bottom board,touch screen,USB camera and other *** principle of the vision system can be described as follows:Six image of the Rubik's cube are captured by the USB camera. Each block on the cube is segmented and determined via a proposed image segmentation algorithm and *** then, an artificial intelligence search reduction algorithm is introduced to restore the Rubik's cube.
Zebrafish can fully regenerate their myocardium after up to 20percent ventricular resection within 2 months without evidence of scar tissues. The extraordinary regenerative abilities provide a significant model system...
详细信息
ISBN:
(纸本)9781457703829
Zebrafish can fully regenerate their myocardium after up to 20percent ventricular resection within 2 months without evidence of scar tissues. The extraordinary regenerative abilities provide a significant model system to study the activation of the regenerative potential of human heart tissue. In order to characterize cardiac functions of zebrafish during heart regeneration, we used high-frame-rate high-frequency ultrasound system with the capabilities of 75 MHz B-mode imaging to monitor real-time cardiac parameters. Longitudinal in vivo experiments was carried out to capture echocardiographic images from individual fishes. A pilot study on 6 fish over 30 days post amputation (dpa) was performed using this technique. A total of over 400 videos were captured. To process the large video data, an automatic image segmentation algorithm was developed. By using information obtained from temporal decorrelation of the B-mode image sequence, the epicardium is determined in a region-based level set framework combined with shape priors and Kalman filtering. Afterwards, the size of the heart was estimated frame by frame using the outlined epicardium to obtain its dynamic variation. Subsequently, the maximum and minimum of the heart size was used to calculate ejection fraction (EF). The time course of the mean EF (n(velence)6) with a "V" shape indicates the strong ability of zebrafish to recovery cardiac functions along its morphological regeneration.
Low visibility weather has seriously affected daily traffic management and safety of life and property. Aiming at the problem that highway in low visibility environment is prone to traffic accidents, a highway visibil...
详细信息
ISBN:
(纸本)9781728123264
Low visibility weather has seriously affected daily traffic management and safety of life and property. Aiming at the problem that highway in low visibility environment is prone to traffic accidents, a highway visibility detection method based on video surveillance is proposed, and the surveillance video data of each section are analyzed. Based on the traditional dark channel prior, the highway visibility detection method converted the surveillance video frame into gray image, and extracted the air transmittance and atmospheric light value contained in the surveillance image by combining the adaptive guided filtering algorithm and quadtree image segmentation algorithm. Then based on the visibility calculation model, the visibility distance of the road was estimated according to the actual distance and offset angle between the monitoring equipment and the detection object. The experimental results show that the optimized image processing method can solve the problems of low image clarity, color distortion, and poor scene adaptability. The detection of visibility error rate meets the accuracy requirements of highway visibility detection in China. Finally, a road real-time visibility detection and warning system is applied based on the corresponding early warning strategies of each visibility level.
Our work is about a new class of object trackers that are based on a boosted Multiple Instance Learning (MIL) algorithm to track an object in a video sequence. We show how the scope of such trackers can be expanded to...
详细信息
ISBN:
(纸本)9781479923427
Our work is about a new class of object trackers that are based on a boosted Multiple Instance Learning (MIL) algorithm to track an object in a video sequence. We show how the scope of such trackers can be expanded to the tracking of articulated movements by humans that frequently result in large frame-to-frame variations in the appearance of what needs to be tracked. To deal with the problems caused by such variations, our paper presents a component based version of the boosted MIL algorithm. Components are the output of an image segmentation algorithm applied to the pixels in the bounding box encapsulating the object to be tracked. The components give the boosted MIL the additional degrees of freedom that it needs in order to deal with the large frame-to-frame variations associated with articulated movements.
暂无评论