초록 ▼

The present invention provides a radar apparatus and like systems and method which comprise coordinate converting means for signals defined in a polar coordinate system to corresponding signals defined in Cartesian coordinate system, an image memory, and an indicator with pixels the number of which

The present invention provides a radar apparatus and like systems and method which comprise coordinate converting means for signals defined in a polar coordinate system to corresponding signals defined in Cartesian coordinate system, an image memory, and an indicator with pixels the number of which being the same as that of memory elements of the image memory, and further comprise means for drawing imaginary first and second sweep lines on pixels or memory elements of the image memory to determine a first sample point for a pixel on the second sweep line or to determine a last sample point for a pixel on the first sweep line, and perform a signal processing such as data correlation or interpolation in response to the detected last sample point or the first sample point detected so that displayed image quality is improved.

대표청구항 ▼

[What is claimed is:] [7.]a primary memory storing in real time received data;coordinate converter for converting a point defined in a polar coordinate system to a corresponding point defined in a Cartesian coordinate system;first sample detecting means for judging whether a pixel to which a sample

[What is claimed is:] [7.]a primary memory storing in real time received data;coordinate converter for converting a point defined in a polar coordinate system to a corresponding point defined in a Cartesian coordinate system;first sample detecting means for judging whether a pixel to which a sample point j on a second sweep line is allocated does not coincide with any of the pixels to which a plurality of adjacent sample points on a first sweep line .theta..sub.n-1 and the second sweep line .theta..sub.n are allocated and for determining the sample point j as the first sample point if they are not coincident with each other;last sample detecting means for judging whether a pixel to which a sample point i on the first sweep line is allocated does not coincide with any of the pixels to which a plurality of adjacent sample points on the first sweep line .theta..sub.n-1 and the second sweep line .theta..sub.n are allocated and for determining the sample point i as the last sample point if they are not coincident with each other;an image memory with a memory element corresponding to the resultant point converted by the coordinate converter and defined in a Cartesian coordinate system being accessed;a memory for storing the maximum value data for a pixel obtained at respective sample points on the second sweep line;maximum value data extracting means for writing fresh input data obtained at a sample point j allocated to a pixel and on the second sweep line into said memory if this sample point j is determined as the first sample point, and for writing into said memory data having larger value out of fresh input data obtained at a sample point j or data corresponding to the pixel and previously having been stored in said memory if this sample point j is not determined as the first sample point;the write data generating means uses, when a sample point i is judged as the last sample point, the data having been obtained at the sample point i for the pixel as the fresh input data; andan indicator for displaying the data output from said image memory.