微处理机
微處理機
미처리궤
MICROPROCESSORS
2014年
3期
36-39
,共4页
星空环境%伪Hough微分%距离角度增量
星空環境%偽Hough微分%距離角度增量
성공배경%위Hough미분%거리각도증량
Star environment%Pseudo Hough Differential Recognition Algorithm%The increment ratio of the distance and angle
在星空环境中目标靠近星点或离开星点，当二者相距很近交汇角较小的时候，仅仅利用角距信息无法将二者区分开，为此提出了一种伪Hough微分识别算法解决目标与星接近、交汇角较小时的星点识别问题。借鉴Hough变换映射思想，将目标点与星图坐标原点之间的距离R以及该点与坐标原点之间的连线与x轴所成夹角θ映射成为参数空间的（R，θ），通过dR/dθ的变化量来识别星与目标。通过理论分析和实验仿真得到dR/dθ与目标点位置选取无关，与运动速率有关，运动速率越大变化越明显。在相同条件下距离角度增量的比值比单纯的角距变化值要高出一个数量级。利用距离角度增量比值可有效辨别出相距固定星点很近的运动目标。
在星空環境中目標靠近星點或離開星點，噹二者相距很近交彙角較小的時候，僅僅利用角距信息無法將二者區分開，為此提齣瞭一種偽Hough微分識彆算法解決目標與星接近、交彙角較小時的星點識彆問題。藉鑒Hough變換映射思想，將目標點與星圖坐標原點之間的距離R以及該點與坐標原點之間的連線與x軸所成夾角θ映射成為參數空間的（R，θ），通過dR/dθ的變化量來識彆星與目標。通過理論分析和實驗倣真得到dR/dθ與目標點位置選取無關，與運動速率有關，運動速率越大變化越明顯。在相同條件下距離角度增量的比值比單純的角距變化值要高齣一箇數量級。利用距離角度增量比值可有效辨彆齣相距固定星點很近的運動目標。
재성공배경중목표고근성점혹리개성점，당이자상거흔근교회각교소적시후，부부이용각거신식무법장이자구분개，위차제출료일충위Hough미분식별산법해결목표여성접근、교회각교소시적성점식별문제。차감Hough변환영사사상，장목표점여성도좌표원점지간적거리R이급해점여좌표원점지간적련선여x축소성협각θ영사성위삼수공간적（R，θ），통과dR/dθ적변화량래식별성여목표。통과이론분석화실험방진득도dR/dθ여목표점위치선취무관，여운동속솔유관，운동속솔월대변화월명현。재상동조건하거리각도증량적비치비단순적각거변화치요고출일개수량급。이용거리각도증량비치가유효변별출상거고정성점흔근적운동목표。
The paper presents a pseudo hough differential recognition algorithm to solve the problem that the targets are difficult to be identified only relying on the star diagonal distance when the target appears close to the star or far away from each other.Using the Hough Transform for reference,the distance R between the target and coordinate origin of the star image and the angleθbetween the line and x-axes are mapped parameter space (R,θ).According to the change of dR/dθ,the star and moving targets are recognized.The results of the theory analysis and the simulation show that the change of dR/dθis irrelevant to the target position but relevant to the moving velocity,i.e.the more quickly the target moves,the more obviously the change behaves.In the same condition,the increment ratio of the distance and the angle is greater than that of the single star diagonal distance.Therefore,the increment ratio of the distance and angle can be used to effectively recognize the moving targets close to the star background.
