Usage of LED lights reduces 50% of total energy consumption. This can facilitate a future that is in front of us i.e. Li-Fi. This technology is used for transmitting data through VLC Communication. Visually challenged persons can be benefited by using this technology as it can guide them in an indoor system. The data transmission occurs only when a person has entered the room. It guides the person inside the room to walk confidently with the knowledge of each and every obstacle with the help of audio feedback. Comparatively, Li-Fi offers much higher speed of communication than Wi-Fi.

Purpose: The purpose of this paper is to study various ship detection methodologies. The accuracy of ship detection using satellite images still suffers from disturbances due to cluttered scenes and varying ship sizes. The suitability of the techniques for various applications is explained in this survey. Design/methodology/approach: A list of data on the subject was gathered and processed into tables. The test outcomes were then discussed to determine the most effective ship detection technique under various complex environments. Findings: In this work, the advantages and disadvantages of different classification techniques of ship detection are highlighted. The suitability of the techniques for various applications is also explained in this survey. Several hybrid approaches can be developed in order to increase the accuracy of ship detection system. This survey also aids in highlighting the significant contributions of satellite images to effective ship detection system. Originality/value: In this paper, studying various ship detection methodologies is given specific attention. A survey on ship detection and recognition is clarified with the detailed comparative analysis of various classifier techniques.