CAJ | 학술논문

为了保证电动变焦数字监控摄像机的变焦步进电机和调焦步进电机的调节范围在厂家设计的可聚焦范围内，设计了一种基于变焦曲线的变焦电机和调焦电机的原点位置校正方法。首先，从镜头厂家提供的镜头变焦曲线中选定一条作为标准曲线。接着，利用自动调焦方法采集标准曲线对应距离下的实际变焦曲线。然后，计算标准变焦曲线的最高点和实际变焦曲线的最高点的偏移量。最后，在该偏移量附近的一个小范围内按照平方差最小的原则求出最佳偏移量即为原点位置的补偿值。在30倍光学变焦数字高清摄像机中实现了该方法，实验结果表明：48台采用本文方法成功校正的镜头在设计调节范围内均没有出现电机堵转和无法聚焦的现象，校正成功率96%，很好地解决了由于原点位置误差造成的问题。
위료보증전동변초수자감공섭상궤적변초보진전궤화조초보진전궤적조절범위재엄가설계적가취초범위내，설계료일충기우변초곡선적변초전궤화조초전궤적원점위치교정방법。수선，종경두엄가제공적경두변초곡선중선정일조작위표준곡선。접착，이용자동조초방법채집표준곡선대응거리하적실제변초곡선。연후，계산표준변초곡선적최고점화실제변초곡선적최고점적편이량。최후，재해편이량부근적일개소범위내안조평방차최소적원칙구출최가편이량즉위원점위치적보상치。재30배광학변초수자고청섭상궤중실현료해방법，실험결과표명：48태채용본문방법성공교정적경두재설계조절범위내균몰유출현전궤도전화무법취초적현상，교정성공솔96%，흔호지해결료유우원점위치오차조성적문제。
In order to ensure the adjustment range of the optical zoom digital surveillance camera’s zoom and focus stepper motors, a correction method based on zoom tracking curve is designed. First, select a standard curve from the zoom tracking curve manufacturers provided. Second, the real zoom tracking curve with the same distance of the standard curve is collected by the method of automatic focusing. Then, offset of the highest points in two curves is calculated. Finally, with the principle of minimum squared difference, optimal offset value is found in a small area near the offset. This correction method is realized in high-definition digital video camera with 30× lens. Experiments show that this correction method is a good solution for solving the problems of stall phenomenon and out of focusing caused by motor origin error.