By using time-frequency localization of wavelet transform, we apply wavelet transform to detect dim target in small target images and present two fast from-coarse-to-fine algorithms of dim target detection.

• 本文利用小波变换的时频局部化特点,将小波变换用于检测图像中的弱小目标,并提出两种由粗到精的弱小目标快速检测方法。