Designing and developement a laser imaging system with depth measurement and image defogging capabilities

Subject Areas : Journal of Radar and Optical Remote Sensing and GIS

Ali Faragi ¹ (دانشجوی کارشناسی ارشد مهندسی برق گرایش جنگ الکترونیک دانشگاه جامع امام حسین)
Abbas Bashiri ² (Instructor of electronic, department of Information and communication technology, Imam Hossein University, Tehran, Iran)
Mehdi Nasiri ³ (دانشکده برق)

Received: 2023-12-03 Published : 2024-02-06

Keywords: distance measurement in fog, stereo imaging in fog, removal of fog effects, 3D imaging,

Abstract :

Most smart and unmanned aerial vehicles use optical imagers for imaging and distance measurement. But in the foggy environment, the quality of the images taken by these systems is not good enough and there is even a possibility of destroying the images. Because the light gets scattered in contact with water vapors and fog and destroys the image recorded in the imager. Therefore, image processing is very important in these systems, but in heavy fog, distance measurement faces a serious problem. Other alternative methods are generally not economical or efficient. In this article, a new method is introduced for distance measurement and imaging on the sea surface. This method scans the environment by using two stereo imagers whose optical axis is parallel and a linear laser located on one of the cameras, and using trigonometric relations, the difference of light lines recorded in the imagers is calculated and the image and sample 3D is created from the environment. The analysis of the obtained results shows that the system is able to measure the distance of the environment with an error of less than one centimeter, and due to the type of arrangement of imagers and laser, it overcomes the effects of fog in the images with a much lower cost than other hardware.