In recent years, object recognition for marine persistent surveillance has attracted much attention from researchers. The surveillance videos are captured with using optical sensors in shallow-deep water where marine vehicles are moving, e.g., ships, submarines, and underwater unmanned vehicles (UUVs). Access to efficient videos for maritime control and marine transportation system (MTS), particularly underwater optical videos, is still a critical demand for underwater tourism industry. As there are serious problems in underwater optical video imaging systems such as light scattering and absorption in water, low contrast, fog and haziness, detecting various underwater objects will be a difficult task. Moreover, a reliable and safe MTS with the capability of detecting and recognizing underwater objects is required to reduce the costs of movements. The current study addresses predictive challenges and evaluates many video frames with poor qualities of various aquatic species as a real dataset. Intelligent processing of vision computing-related extracted features is performed with the aid of a modified convolutional neural network (CNN) architecture for underwater IoT platforms to support MTS. The decision-making structure in the proposed method is based on a modified residual neural network (mResNet) to recognize trained underwater objects through video frames. The mResNet approach uses the dilation feature to extract the most information from the video frames. Moreover, features extracted from the ResNet structure are designed using traditional learning approaches including feature selection and classification to identify the undersea objects. Also, an optimization process is employed to find the best kernel parameters of the support vector machine (SVM) classifier used in the proposed structure. Our experimental results indicate that the proposed model has a classification accuracy of 93.51% in real videos.

Microwave and millimeter-wave reflectometry is one of the potential techniques for the diagnosis and detection of biological abnormalities, such as subcutaneous masses or cancerous tumors in human body. In this paper, a high-quality microwave sensor based on planar misrostrip resonator is designed, fabricated, and successfully tested with different kinds of biological samples. The proposed sensor has unique properties such as small size, simple fabrication, non-contact with a sample, excellent de-coupling from surroundings, and high microwave power is directly coupled into the tissue. Two experiments are performed for the detection of visible and hidden “lipoma” (fat masses), and minimum size of “lipoma” that is diagnosed by the sensor is obtained as well. In this regard, a two-dimensional image of hidden “lipomas” with amplitude contrast about 30 dB and frequency shifts contrast about 60 MHz at aλ/10 (at 13.5 GHz) stand-off distance is provided. Finally, a measurement scenario for the detection of skin cancer based on the artificial model using different layers of raw chicken with different water content is described. Results show that the proposed microscope is easy to fabricate and provide a low-cost solution for fast and accurate skin cancer detection.