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Impulse noise removal is a very important preprocessing operation in many computer vision applications. This paper presents a low-complexity noise removal based on a conditional technique and outlines its FPGA implementation for window sizes of (3×3) and (5×5). As the experiments show, the proposed technique performs significantly better than standard median filter and achieves superior image quality...
Vision based navigation and path planning for the Indian Lunar Rover calls for Stereo navigation cameras. These Navcams proposed to be mounted at the front face of the Rover, give information of obstacles like boulders/ craters/ pits on the path ahead. By analyzing the scene captured by these Navcams, the trajectory of the Rover will be planned and executed. The design of a miniature Navcam to operate...
Modular based partially and dynamically reconfigurable (PDR) FPGA system is an ideal solution for run-time image processing system which needs to change the function of the processing unit dynamically. Here we present a new PDR image filter based on our self-developed FDP FPGA Device. In this system, the transition bus (TB) structure is proposed for physical separation of the static/dynamic blocks...
To solve the non-uniformity problem of multi Time Delay Integral Charge Couple Device (TDICCD) mosaic camera, a non-uniformity correction algorithm is proposed and implemented on Field-Programmable Gate Array (FPGA) platform. Firstly, the generation and definition of non-uniformity are introduced; several common non-uniformity correction methods are discussed. Secondly, the correction algorithm is...
The underwater robots called Unmanned Underwater Vehicles (UUVs) take over complex and dangerous underwater missions that were previously performed by humans. These vehicles operate in the unknown environments and make their own decisions within the mission based on the readings of the sensors, without any link with a human operator. Independent of the mission, it is critical for the AUVs to be able...
Impulse noise removal is a very important preprocessing operation in many computer vision applications. This paper presents a noise removal approach based on a simple conditional technique. As evaluations show, the presented technique performs significantly better than standard median filter and achieves superior image quality. Experimental FPGA implementation of the proposed technique for window...
Median filter has good capabilities for reducing a variety kind of random noise, and causes less ambiguity than linear smoothing filters under same processing size. In order to suppress the impulse noise of digital video signal and meet the system's needs of real-time, it is of great significance to do fast filtering of image based on hardware. By analyzing the common 3×3 filtering window's mathematical...
The aim of the present work is the characterization of the S8898-128-02 Avalanche PhotoDiode array (APDs) from Hamamatsu Photonics. This work includes the implementation of a readout system as well as electronic noise estimation in APDs under several conditions varying integration times and clock frequencies.
Modern Field Programmable Gate Arrays (FPGAs) are capable of performing complex discrete signal processing algorithms with clock rates above 100 MHz. This combined with FPGA's low expense, ease of use, and selected dedicated hardware make them an ideal technology for a data acquisition system for a positron emission tomography (PET) scanner. The University of Washington is producing a high-resolution,...
This paper presents the design and implementation of robust real-time visual servoing control with an FPGA-based image co-processor for a rotary inverted pendulum. The position of the pendulum is measured with a machine vision system whose image processing algorithms are pipelined and implemented on a field programmable gate array (FPGA) device to meet real-time constraints. To enforce robustness...
A real-time image defogging processing method based on FPGA is proposed to increase low-contrast of the aerial images in foggy vision conditions. According to the high similarity of the contiguous frame histogram in video image, the histogram equalization algorithm is improved to enhance the image contrast. The median filter algorithm is used to eliminate the noise of the image. The experimental results...
The security problem of screen image leakage from a display unit has received wide interest of security researchers since the Van Eck's paper. As for the industry side, the problem is considered a security risk; especially for the computers that are used in the sensitive business fields, i.e. banking, data center. To solve this problem, reduction of the emanating signals' S/N ratio is important. Therefore,...
This paper presents a complete system to detect scratches in rolls of photo paper. The idea is to use a group of white LED to illuminate the picture and highlight the scratches only. The system mainly consists of a camera to obtain images from the paper and an Altera DE2-70 FPGA Board to process those images. We can show that observing the scratches by applying specific filters on the acquired image...
The T2K Fine Grained Detector is an active neutrino target that uses segmented scintillator bars to observe short-range particle tracks. 8448 multi-pixel photon counters coupled to wavelength shifting fibres detect scintillator light. An application specific integrated circuit shapes the MPPC waveform and uses a switched capacitor array to store up to 511 analog samples over 10.24μs. High and low...
In this paper, we present a fast implementation of the vector directional distance filter (VDDF) for noise suppression and fine-details preservation in color image, based on FPGA hardware/software (HW/SW) environment. For the ease of implementation, we have proposed some approximations. An efficient hardware implementation is developed to acquire best execution time. After validation, using NiosII...
In this paper, we propose a frame prediction algorithm to eliminate the flicks and blank under the environment of the refresh rate of 240 Hz in the full color LED Screen. It is well known that the LED Display System has both Blank and Ghost Noise problems. Blank symptoms can be improved by displaying the Video Frame repeatedly in the field of LED display. However it turns out to be inefficient and...
This paper deals with the evolutionary design of area-efficient filters for impulse bursts noise which is often present in remote sensing images such as satellite images. Evolved filters require much smaller area in the FPGA than conventional filters. Simultaneously, they exhibit at least comparable filtering capabilities with respect to conventional filters. Low-cost embedded systems equipped with...
The stable Euler-Number based image binarization gives excellent visual results for video frames containing high amount of image noise. Being computationally expensive, its implementations are limited to general purpose processors for the most cost-effective solution or in application specific integrated circuits for maximum performance. This paper proposes a modified stable Euler-number based algorithm...
This paper mainly covers the development of a FPGA-based fuzzy controller and image processing system for a small-sized humanoid robot. All the computations are operated on an FPGA board including the real-time image processing and the fuzzy logic controller design for PK event in FIRA RoboWorld cup. At first, the specification of the hardware is introduced. The image processing is then employed for...
The paper discussed how improve the detection probability of small targets in the complicated background of low signal noise ratio, algorithm of an improved image enhancement and digital filtering are presented for improve image quality, and improve signal to noise ratio, that is achieve the suppressing background noise and enhance the purpose of small targets. For requirements of real-time infrared...
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