Radar Apparatus Azimuth Data Enlargement

The patent applies preliminary action by performing enlargement processing on detected image data before writing it into the image memory. The data shifter and azimuth direction detected image data corrector enlarge the target image data in the azimuth direction during the data preparation phase, so that when the data is written to memory, the enlargement is already complete. This avoids the need for multiple read-access-write cycles that would otherwise be required, thereby maintaining image drawing speed while achieving target enlargement for improved visibility.

The patent applies local quality by making the enlargement processing selective rather than uniform. The azimuth direction detected image data corrector compares detected image data with shifted data and performs enlargement only when necessary (when targets are present and require enhancement). This localized approach ensures that only specific regions of the image that need enlargement are processed, while other regions maintain their original resolution, thereby improving target visibility without unnecessarily reducing overall display resolution.

The patent applies dimensionality change by shifting the enlargement operation from the memory access domain to the data processing domain. Instead of enlarging data through multiple memory read-write cycles (time-consuming in the memory dimension), the data shifter performs enlargement by shifting and combining data in the processing dimension before memory writing. This dimensional shift allows high-resolution display support without proportionally increasing data writing time, as the enlargement is achieved through efficient data manipulation rather than repeated memory operations.

The patent applies asymmetry by implementing directional enlargement that accounts for the geometric relationship between the radar beam and target position. The azimuth direction detected image data corrector performs enlargement specifically in the azimuth direction (horizontal direction on display) rather than uniformly in all directions. This asymmetric enlargement approach preserves the natural shape characteristics of targets while improving their visibility near the center of the display, as it compensates for the beam expansion effect without distorting the target's inherent shape proportions.