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In this paper, we propose an accurate edge detector using richer convolutional features (RCF). Since objects in natural images possess various scales and aspect ratios, learning the rich hierarchical representations is very critical for edge detection. CNNs have been proved to be effective for this task. In addition, the convolutional features in CNNs gradually become coarser with the increase of...
In this paper, we propose a shape-guided segmentation algorithm for fine-grained visual classification(FGVC). First, edge information is extracted from the query image and compared with each sample of training set, which can help us retrieve a subset of candidate proposals. These proposals are used to learn prior shape knowledge by separately estimating the foreground probabilities of corresponding...
In this work, a multimodal approach is proposed to use the complementary information from fundus photographs and spectral domain optical coherence tomography (SD-OCT) volumes in order to segment the optic disc and cup boundaries. The problem is formulated as an optimization problem where the optimal solution is obtained using a machine-learning theoretical graph-based method. In particular, first...
High dynamic range image processing have recently become an important topic in consumer electronics market. While multi-scale retinex with color restoration (MSRCR) have been well developed, disadvantages of low performance is not favorable to a mobile computer-vision system. To remedy the above problem, this paper proposes an accelerated MSRCR with effective use of ARM Cortex-A9 architecture and...
Text contained in images and video frames provide an important clue for content based images and video indexing. However, in natural scene, text elements are corrupted by many types of noise, such as streaks, highlights, or cracks. These effects make the clean and automatic segmentation very difficult and can reduce the accuracy of further analysis such as optical character recognition. This paper...
The text appears in the images is important for fully understanding the images. The number of digital images and digital videos has increased tremendously. Although there are many methods have been proposed over the past years for the text extraction from natural scene images, the text detection and extraction from born-digital images are still a challenge. In this paper, we describe existing methods...
Most LED luminaires encounter the problem of color non-uniformity in illumination fields. In order to address the issue, we propose a ripple TIR lens, which can apply to both phosphor-converted LEDs and multicolor LED arrays and achieves good color performance. The ripple TIR lens consists of a collimator and a ripple panel. Simulation results based on a precise phosphor-converted white LED model...
Retinex is an image restoration method and the center/surround Retinex is appropriate for parallelization because it utilizes a convolution operation with large kernel size to achieve dynamic range compression and color/lightness rendition. However, its great capability for image enhancement comes with intensive computation. This paper presents a GPURetinex, which is a data parallel algorithm based...
This paper presents a new type of autonomous robotic fish with vision-based target tracking and obstacle avoidance. The robotic fish can sample images through its eye and recognize the meaningful color patch via a special vision algorithm. Specifically, an ARM9-centered microcontroller in conjunction with a CMOS camera for image acquisition is developed to effectively handle local visual information...
Most of studies of Kansei engineering have discussed the relations between user's Kansei evaluation and product's form element features. However, the future trend of creative product design is no longer only to emphasize the shape and color of products, but has to put equal emphasis on texture consideration to satisfy users' affective requirement. The effect of creative texture design of products...
This paper presents a style description method for product form design. Designers, as designated `form-givers', are expected to understand the essence of formal styles and the skill how to give sensitive, intentional style to the artifacts they design. Firstly, this paper investigates the essence of formal style, including its definition, function, structure and components. Secondly, a style description...
With the digital technology developments, Digital Cinema outperforms traditional films and attracts the movie industry. The first edition Digital Cinema System Specification was released by Digital Cinema Initiatives, LLC (DCI) in 2005, which advances the Digital Cinema development. We have developed a Digital Cinema Playback system compliant with the DCI Specification. It can extract and play the...
Automatic focusing is very important to high-quality image acquisition for digital still camera system. This paper will propose a new automatic focusing method using skin- color face detection to automatically determine focusing area. In order to overcome the influence of color temperature on the face detection method, this paper proposes a new automatic white balance method by learning color temperature...
The color uniformity is a critical index in the evaluation of high quality white light emitting diodes (LEDs). The main factor affecting the color distribution is the state of the phosphor. The secondary factor is the optical structure. This paper analyzes two parameters of the phosphor layer (thickness and concentration) and six optical structures. Results indicate that the structures with reflector...
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