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The ball grid array (BGA) has become one of the most popular packaging alternatives for high I/O devices in the industry with many advantages: high interconnection density and less packaging space and so on. In these days, the size of chip becomes small and the size of ball grid also becomes small, so the process of BGA alignment becomes more important and difficult. In this paper, the BGA alignment...
In this paper, a new adaptive vector filtering method with low computational complexity for image sensor applications is presented. The alternation between the ASDDF and the AVMF in the dependence on the order-statistics theory reduces the computational complexity. In addition, the proposed method provides excellent detection of noisy pixels and removes both chromatic and achromatic noisy pixels.
X-ray cross-sectional images were used to inspect the brazing joints of heat exchanger rather than penetration images. This paper focused on developing non-destructive testing using X-ray to inspect defects of brazing heat exchanger. The cross-sectional images of brazing joints are obtained by using CT (computerized tomography). Since the penetration images are three-dimensionally superimposed, the...
The majority of image registration methods deal with registering only two images at a time. Recently, a clustering method that concurrently registers more than two multi-sensor images was proposed, dubbed ensemble clustering. In this paper, we apply the ensemble clustering method to a deformable registration scenario for the first time. Non-rigid deformation is implemented by a free-form deformation...
Display devices of portable devices can express very limited colors so that the dithering at the post-video processing step is inevitable, which degrades greatly the video playback performance. The main cause comes from the huge data size for converting full color RGB to dithered RGB. This paper proposes an efficient post-video processing method that reorders sub-phases of the post-video processing...
This research proposes new system which finds the music by using Query-by-humming (QBH). For finding a stored music, the features of humming data are selected by using G.729 feature extractor. We normalize the extracted features by using mean-shifting, median filtering, average filtering and min-max scaling methods. Then the corresponding music is matched based on dynamic time warping (DTW) algorithm...
Recently human gait has been considered as a useful biometric supporting high performance human identification systems. Here we are more interested in understanding the gait including the direction rather than the human identity. We propose the use of SOM for interpreting human gait activity using the silhouettes of a pedestrian. The technique and the result may be able to find applications in view-independent...
In this paper, we propose a novel architecture of a general graphics shader processor without a dedicated hardware. Recently, mobile devices require the high performance graphics processor as well as the small size and low power. The proposed shader processor is a GP-GPU (General-Purpose computing on Graphics Processing Units) to execute the whole OpenGL ES 2.0 graphics pipeline by using shader instructions...
The rear-view camera at the vehicle's backside is equipped for parking supports display system. It requires a wide-angle lens for obtaining a broad landscape. Throughout the wide-angel lens, an input picture is converted the Barrel distortion. Therefore, a driver cannot make out the distorted input picture in order to overlay the track directly. In this paper, we propose the generation automatic guideline...
A neuro-fuzzy Object Detection Engine (ODE) is proposed as the pre-processing accelerator of multi-object recognition processor to reduce the computational complexity. It performs a fast and robust neuro-fuzzy object detection algorithm with Motion Estimator (ME) and Visual Attention Engine (VAE) within 1ms. The mixed mode implementation achieves 22.9GOPS 2.83mW ODE, and reduces the area by 59% and...
In this paper we present a new approach for the detection of lip centers based on eye localization that is adopted into a lip reading system in mobile environments. First, the centers of left eyes and right eyes are localized directly. Then we use the geometry characteristics of faces to extract rough lip regions. Next, we use 2 steps of threshold adaptation to binarize lip images. The first threshold...
In this paper, we propose an image retrieval method using color feature and shape feature. We suggest CBIR (content based image retrieval) method using color and shape information. Using just one feature information may cause inaccuracy compared with using more than two feature information. Therefore many image retrieval system use many feature information like color, shape and other features. We...
To enable power-efficient object recognition of mobile intelligent robots, 81.6 GOPS object recognition processor is proposed. Based on analysis of scale invariant feature transform (SIFT) algorithm, architecture of the proposed processor is designed to support both task and data level parallelism. 10 processing elements (PEs) are integrated for task parallelism, and each PE is equipped with SIMD...
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