The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We introduce a novel formulation of temporal color constancy which considers multiple frames preceding the frame for which illumination is estimated. We propose an end-to-end trainable recurrent color constancy network – the RCC-Net – which exploits convolutional LSTMs and a simulated sequence to learn compositional representations in space and time. We use a standard single frame color constancy...
This paper presents an improved pedestrian tracking algorithm with image sequences acquired by surveillance cameras. This pedestrian tracking algorithm is based on mean shift algorithm, and it uses color histogram equalization to improve the original algorithm. The improved algorithm performs much better than the original algorithm in some situations. We use the CAVIAR project/IST 2001 37540 dataset...
Vision based environmental monitoring using fixed cameras generates large image collections, creating a bottleneck in data analysis. In areas with limited background knowledge of the monitored habitat, this bottleneck can often not be overcome by traditional pattern recognition methods. A new change detection method to identify interesting events such as presence and behavior of different species...
People re-identification is a difficult problem in non-overlapping video surveillance, because pedestrian images contain variations in view angle, lighting, background clutter and occlusion. This paper presents an approach for person re-identification in surveillance system by taking pedestrian sequence (set) as processing element. The distance metric is learnt from relative and irrelative set-to-set...
The High Efficiency Video Coding (HEVC) standard includes support for a large range of image representation formats and provides an excellent image compression capability. The High Efficiency Image File Format (HEIF) offers a convenient way to encapsulate HEVC coded images, image sequences and animations together with associated metadata into a single file. This paper discusses various features and...
In this paper we propose a method for detecting the presence of flame in a video stream in a natural environment. Firstly, the anomaly of image sequence is detected by background subtraction method. Then, the image sequence of the abnormal situation is segmented, and the area of the suspected flame is extracted. Finally, through the color and the shape feature recognition, to determine whether the...
A clean background image is of great importance in multiple applications such as video surveillance, object tracking and context-based video encoding, but acquiring a clean background image in public areas is seldom possible. Many algorithms have been developed to initialize the background from videos and images. This paper presents a database consisting of 13 different scenes that can be used for...
The contradiction that imaging system can acquire huge amount of image data while communication system can deliver only a very small part of them has become a bottleneck for the small-satellite based earth observation. In this paper, a novel onboard image selection strategy is designed to select most informative images that are acquired by the imaging system for transmission. Specifically, the image...
Reconstructing depth map from a sequence of images with different camera settings, known as Depth from Focus (DFF), has been addressed for decades. However, Classical local methods, e.g., windowed filter, usually produce uncertain estimation in textureless areas and depth discontinuities. Meanwhile, they appear sensitive to filter size and image noise. In this research a semi-global depth from focus...
Liquid crystals are substances with high impact technological, new substances have been discovered and the properties of these materials need to be examined. When viewed under a microscope using a polarized light source, different liquid crystal phases will appear to have distinct textures and colors. The use of digital image processing and computer vision is being initialized in the analysis of these...
This paper presents an efficient image stitching algorithm with better image quality and less processing time for stitching a continuous image sequence. In the beginning, the blurred image frame is filtered out by considering the variation of its edge amount under different scales. Stitching a lot of frames with similar scene is time-consuming and easily generates the inconsistency in the overlap...
Panoramic image mosaic is a technology to match a series of images which are overlapped with each other. Panoramic image mosaics can be used for different applications. Image mosaic has important values in various applications such as photogrammetry, computer vision, remote sensing image processing, medical image analysis and computer graphics. Image mosaics also can be used in moving object detection...
Object segmentation in videos or image sequences is a crucial task and has gained more and more attention in the past years, as computer performance is increasing. Segmentation may be carried out in the field of video surveillance with automatic object tracking or as a composing and editing task in the postproduction of movies. In the first case a suitable real-time performance is wanted with a drawback...
Automatic face location in complex scenes is extremely challenging in human face recognition system. The accuracy of the location is also a critical factor to the recognition performance. This paper presents a scheme to accurate eye detection from face sequences. After detecting the preattentive features by using the Gaussian steerable filter, face models are investigated to locate the whole face...
A robust algorithm for the detection of reflections in colour image sequences is here presented. The algorithm directly works on the RGB space and it performs an analysis at two different resolution levels, i.e. the pixel level and the region level. The proposed algorithm is used to improve the localisation and tracking capabilities of a video-based surveillance system. Results showing the goodness...
This paper proposes a novel algorithm for fractal coding of color image sequence, based on the extended CPM (Circular Prediction Mapping). In the extended CPM, each range block is approximated by a domain block in the adjacent frame, which is of the same size as the range block. Therefore the proposed domain-range mapping is similar to the block matching algorithm in the motion compensation techniques,...
In high-speed video imaging acquisition, artificial lighting can cause non-uniform luminosity and chroma variation between frames, which is linked to the interaction between the frequency of the lighting power source and of the video acquisition. This problem is commonly dubbed “flicker”. Deflickering techniques are also useful for resolving similar problems encountered in other applications for instance...
Fusion of multi-exposure images for dynamic scenes often show ghost effect. This is mainly due to motion blur present in the image sequences or due to presence of totally new object. Detection and removal of such ghost effect plays an important role for automatically generating HDR images of dynamic scenes. In this paper, we present a simple, yet effective method for multi-exposure image fusion for...
Structure from Motion (SfM) is considered to be a low-cost and easy-to-use 3D digitization method compared to other methods such as laser scanning. SfM has become a widely used reconstruction method in cultural heritage applications including museums artifacts and archaeological sites. In this paper we are going to present a comparative study for using two SfM software: PhotoScan from Agisoft and...
This paper proposes a new motion capture system to track human motion with high-speed RGB-D cameras. The proposed system uses synchronized and calibrated high-speed RGB-D cameras to simultaneously record color and depth image sequences of human motion. A new particle-based skeleton tracking process with color and depth features are adopted to track human motion without markers from high-speed RGB-D...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.