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Image processing includes many various procedures and one of the mostly used is edge detection. Sometimes is desirable to improve precision of edge detector to sub-pixel range. In our paper we deal with precise localization of edge which is moving during the exposure time. For such the edges we tested three edge detectors with sub-pixel precision in 1-D images: algorithm that uses function erf to...
We report on a vision sensor architecture relying on a pixel-embedded memristive device to perform dynamic background subtraction as basic image processing components, aimed at detecting anomalous events in the scene. A Light-To-Frequency Converter generates digital pulses, which are linearly proportional with the light intensity. During the exposure time, a certain number of pulses, with proper width...
With the advent of numerous remote sensing sensors available for the researcher, the fusion of digital image data has become a imperative tool for classifying remote sensing image and evaluation too. Remote sensing image fusion not only improves the spatial resolution of the original multispectral image, but also improves the spectral quality of merged product. Quantitative and qualitative digital...
According to convenience and accuracy problem of clinical wound area measurement method, the wound area measurement software is designed based on the Android. The wound image is photographed by the Android device and is cut out and converted to the grayscale image and the binary image. The invalid area is eliminated and the valid area is extracted. The pixels of wound area are counted. According to...
In the paper we introduce three methods for image processing, they are pixel extraction method, memory method and pointer method. With the same condition of data structure and algorithm, the three methods are used in edge detection for the digital images. In order to compare the actual operation efficiency of these three kinds of methods, we use C# to write a Windows Form Application program in the...
A new stereo vision system is presented, which is based on a low-power CMOS binary vision sensor, with embedded spatial contrast extraction and output data compression, through positional data coding. A novel disparity algorithm adapted to the output of the sensors has been developed. The algorithm has been simulated and tested on a real application. The presented system is targeted towards event-based...
In this paper, we proposed a swift impulse noise suppresser based on adaptive growth algorithm (AGA). It is mainly composed of three parts: signal detector, adaptive growth and indispensable reestablishment and correction. Firstly, we designed a signal detector to detect the real signal pixels and calculated signal density according to the analysis of the characteristic of impulse noise and the distribution...
In this paper, I propose a novel hybrid approach of license plate recognition system based on Neural Network and Image Correlation for classification of characters. I used image processing for segmentation. The purpose of this study is to develop a more reliable hybrid system than individual one. The license plate number of the vehicles taken from an acceptable distance from it up to 10m. This hybrid...
In applications where shape is used as metadata to describe image and video content, image dependent techniques exhibit superior error concealment performance compared to the traditional MPEG-4 like image-independent techniques. The image corresponding to a particular shape may not be readily known at the decoder and rather needs to be retrieved from of a set of images. This paper presents a novel...
This paper presents a novel for Landsat TM Image processing. It can be used to quantitative simulating each band reflectance of TM image. On the basis of non- destruction of the original band spectral features, it improved single band information and visual sensitivity. The reconstructed Image quality were analyzed using image quality assessment indexes, and the results showed that the image enhancement...
A weld pool image processing algorithm based passive-light-vision has been studied in this paper. Firstly, we have designed a kind of method to directly capture the welding pool images of Gas Metal Arc Welding (GMAW) by a CCD camera with a narrowband filter. Next, using the median filter and wavelet transform eliminates noise and keeps the details of the image effectively. Then, we have proposed to...
Medical diagnosis is one of the most important procedure in which image processing are usefully applied. In this paper, a pneumonia symptoms detection method based on cellular neural networks (CNNs) is proposed. The CNN design is characterized by a virtual template expansion obtained through a multistep operation. It is based on linear space invariant 3 × 3 templates. The proposed design is capable...
This paper presents a novel image security system based on the replacement of the pixel values using recursive Cellular automata (CA) substitution. The advantages of our proposed method are that it is computationally efficient and it is reasonably passing sensibility analysis tests. The proposed method is carried out by using one half of image data to encrypt the other half of the image mutually....
The authenticity or originality of sport jersey cloth fabric in market nowadays is difficult to distinguish. This is a critical issue that leads to the difficulty for customer to know whether they are purchase the original fabric or the fake one. The purpose of this paper is to develop a prototype for Fabric Authenticity System to judge the originality of jersey cloth fabric based on its pattern structure...
When someone is standing in front of a presentation screen, the contrast between the projector light and the indoor illumination is, as a rule, too great. This causes frequent contraction of the pupils of a person's eyes and thereby great discomfort. In this paper we use both an embedded system and a Webcam to design a digital projector which by using image processing methods reduces dazzle in the...
Visual Cryptography is an encryption technique where a secret image is cryptographically encoded into n meaningless share images. In visual secret sharing scheme (k, n) the secret images can be visually revealed by stacking together any k or more transparencies of the shares and by inspecting less than k shares, one cannot retrieve the secret image. In Visual Secret Sharing based on halftoning, the...
We present the principal aspects and the concept of a monocular combination of a scanning 3D time-of-flight sensor with a large-scale conventional 2D image sensor. While the 2D sensor profits from the whole field of view of an F-Mount photo film format lens, the smaller-sized 3D sensor is mounted onto a highly precise XY linear move stage. Thus, by the means of macro-scanning, the 3D sensor can be...
A kind of overlapping effect called bowtie effect occurs around the edge of the scanning swath for optical-mechanical scanner as long as sensors which have swaths wider than one pixel, which aggravates its degree exponentially toward the swath edge. In order to remove bowtie effect, three main factors (satellite motion, earth rotation, scanner mirror) that affect the scanning image are analyzed firstly...
We propose a method of filtering depth maps provided by Kinect depth camera. Filter uses output of the conventional Kinect camera along with the depth sensor to improve the temporal stability of the depth map and fill occlusion areas. To filter input depth map, the algorithm uses the information about motion and color of objects from the video. The proposed method can be applied as a preprocessing...
This paper presents a design method of infrared image display card using FPGA and ADV7123. Its main function includes pixel gray level conversion, image zoom in and PAL standard video signal generation. The design ideals, hardware architecture, FPGA logical modules, FPGA configuration, interconnection between display card and master board, and the PAL standard video signal generation method using...
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