73 results about "Sonar imagery" patented technology

An apparatus for providing marine information is provided including a user interface, a processor, and a memory including computer program code. The memory and the computer program code are configured to, with the processor, cause the apparatus to generate a sonar image based on sonar return data received from an underwater environment, determine a location associated with the sonar return data based on location data received from one or more position sensors, and render a nautical chart on a display. The computer program code is further configured to cause the apparatus to receive a user input on the user interface directed to a portion of the display in which the nautical chart is presented, and modify presentation of the nautical chart such that the portion of the display presents the sonar image in response to receiving the user input.

Sonar imagery captured during a trip on a body of water can be played back to users, forming a trip replay. However, since the depth of the body of water varies drastically over the course of the trip, the resulting sonar image captured and played over the trip replay may result in loss of detail near shallow depths (even though such detail was captured and is available). Embodiments of the present invention seek to provide the ability to zoom in on portions of the sonar image during trip replay. Additionally, further zoom features, such as bottom lock and canopy lock, provide additional functionality.

Systems and methods for presenting marine information are provided herein. A system includes an array of a plurality of sonar transducer elements associated with a watercraft and a display. The system causes presentation of a chart of a body of water, including a representation of the watercraft at a current location. The system also operates the array to cause transmission of sonar beams into the underwater environment and receives sonar return data from the array. The system further generates, based on the sonar return data, a two-dimensional live sonar image, determines a facing direction of the array, and causes presentation of the sonar image in the facing direction on the chart and relative to the representation of the watercraft. Accordingly, live sonar imagery is presented on the chart to visually provide a relationship between objects within the live sonar imagery and the real-world position of those objects.

The application discloses a linear object segmentation method and segmentation system, wherein the linear object segmentation method comprises: through a Hough transform method, mapping an edge image into a polar coordinate system so as to searching for a main peak value and a secondary peak value in the collinear cumulative graph under the polar coordinate system; and according to the main peak value and the secondary peak value, determining whether the position relation between a first straight line and a second straight line meets a segmentation requirement so as to determine whether an initial segmentation threshold value can accurately and effectively divide linear objects in a sonar image, if the determination result is no and the initial segmentation threshold value is not equal to a cut-off segmentation threshold value, correcting the initial segmentation threshold value, and then returning to the step of generating a binary image according to the initial segmentation threshold value and sonar image until the position relation between a first straight line and a second straight line meets a segmentation requirement or the initial segmentation threshold value is equal to a cut-off segmentation threshold value so as to achieve the purpose of searching for an ideal initial segmentation threshold value to perform linear object segmentation on the sonar image.