Research on Histogram Algorithm for Low Voltage Electrical Apparatus Switching Arc's Image Enhancement

Abstract

It's difficult to find contact from the image that was photographed by high-speed image sampling system because of the light reflectiong characteristic of switching arc, contact and interrupter. It do enhancement process to arc image by image enhancement algorithm of histogram and local histogram. In order to find the arc image and on the same time can find contact and the interrupupter's detail in the arcing process. The simulation result shows that the contace and arc's relative position can be observed clearly by this method.

Research on inspection accuracy and application strategy of infrared imaging technology in construction field

“…According to the above formula can be seen, infrared camera temperature measurement is by receiving the radiation emitted by the surface to determine its temperature, the actual test, infrared camera to receive the effective radiation is divided into three parts: the object to be measured by its own radiation, environmental reflection radiation, atmospheric radiation. [9] Therefore, the emissivity and absorptivity of the measured surface, atmospheric transmittance, atmospheric temperature, the surrounding environment, the shooting time, the shooting angle, and the orientation of the house, etc., will have an impact on the imaging results, resulting in the deviation of the measurement results from the real temperature, which increases the difficulty of the actual engineering measurement, resulting in the limitation of the application of this technology in the field of construction. [6] 3.…”

Study on DC arc performance of doped AgSnO 2 contact materials

“…The arc image is processed by an arc image processing method based on mathematical morphology, and the arc area can be extracted from the processed arc image [19]. However, the obtained arc area only reflects the number of pixels in the image of the arcing region, which is a relative value and does not represent the actual arc area.…”

Study on Measuring Method and Experiment of Arc Fault Detection Device

“…One hundred frame images of an arcing period were extracted. Every frame image of arcing light was pretreated by filtering, denoising, and boundary treatment [7,8]. Area of every frame image was calculated used pixels dimension.…”