A Method for Distance Measurement of Moving Objects in a Monocular Image

In this paper, a method for distance measurement only using a single target image without any internal camera parameters is developed. The mapping relation between image row pixel values and the actual distances is established by detecting and locating the corners on the reference target image. The distance information is extracted in real time by combining the moving target detection method based on Gaussian mixture model (GMM) and the shadow elimination in Hue-Saturation-Intensity (HSI) color space. The method has a simple calibration procedure with a single image, which is suitable for practical application. The experimental result shows that the algorithm is effective and satisfies the real-time and accurate requirements of distance detection.