增加清晰度测试可重复性的五个方法

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WEILEJIANSHAORUIDUJIEGUODEBIANHUABINGTIGAOCESHIDEZHONGFUXING，NINYINGGAICAIQUCUOSHIJIANSHAOTUXIANGZHONGDEZAODIAN。

ZHEILIYOU5GEJIQIAOLAIXIANZHICESHIJIEGUOZHONGDEZAOSHENG：

最大化您的样品

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WEILELIYONGZAOSHENGDESHIJIANFANGMIAN，DANGSHIYONGImatestDEGUDINGMOKUAIXUANZEDUOGETUXIANGWENJIANJINXINGFENXISHI，KEYISHIYONG“ZUHEWENJIANJINXINGXINHAOPINGJUN”XUANXIANGHEBINGTONGYICHANGJINGDEDUOGETUXIANG。ZHEIGEJIQIAOSHIYONGYUImatestDESUOYOUFENXI。

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通过图表对比确保足够的信号水平（但不要太多）

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ZENGJIAYINYINGYINGXIANGZUIDADECESHITUDEWAIBUQUYUDEDUIBIDUSHIZENGJIAXINHAODIANPINGDEYIZHONGJISHU。CONGImatestDINGGOUTUBIAOSHI，KEYIGENJUXUYAOQINGQIUZIDINGYI。

请注意处理图像的效果

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CHULITUXIANGDEZUIHOUYIGEJINGGAOSHI，XUDUOXIAOFEILEIXIANGJI（TEBIESHIYIDONGSHEBEIXIANGJI）SHIYONGFEIXIANXINGJIANGZAO（RUSHUANGBIANLVBO），ZHEIKEYIXIAOCHUQINGXIEBIANYUANMUBIAOSHANGDETUXIANGZAOSHENG，DANYEJIANSHAOWENLIXIJIE。（ZHUYI：DANGSHEJIDAOZHEIYANGDEFEIXIANXINGCHULISHI，RUSHANGSUOSHUDUIDUOGETUXIANGQIUPINGJUNZHIJIANGBUQIZUOYONG）。ZAIZHEIZHONGQINGKUANGXIA，QINGXIEDEBIANYUANCELIANGKENENGWUFAGAOSUZHENGGERUIDUDEGUSHI，ERSUIJI（WENLIFENXI）TUKENENGGENGHESHI。

确保更好的曝光

JIAODIDEGUANGZHAOHUANJINGTONGCHANGXUYAOGENGGAODEISOGANGUANGDU，YIHUODELIANGHAODEPUGUANG，CONGERDAOZHICHUANGANQIZAOYINHEBIANHUAZENGJIA。QUEBAOLIANGHAODEZHAOXIANGPUGUANGKEYIJIANSHAOGUANGZISANLIZAOSHENGHETUXIANGZHONGCHUANGANQIZAOSHENGDEXIANGDUIYINGXIANG。TIGAOPUGUANGZHIDELIANGZHONGZHUYAOFANGFA（JINGUANYAOXIAOXINBAOCHIGUANGXIANQUYUDIYUCHUANGANQIDEBAOHEDU，RUSHANGSUOSHU）：

1. 通过增加光源的亮度来增加图表反射的光量
2. 只要照相机和目标都是静止的，就增加曝光时间以聚集更多光线

选择一个可重复的测量

MTFQUXIANDEXINGZHUANGZAIYOUZAOSHENGDEQINGKUANGXIAHUISHOUDAOGANRAO。BIJIAOLIANGGEWANZHENGDEMTFQUXIANHUOZAIBAOGAOZHONGJIARUYITIAOQUXIANTONGCHANGSHIBUQIESHIJIDE，SUOYIGONGCHENGSHITONGCHANGHUIJIANGGUANYUQUXIANDEXINXIJIANSHAOWEIYIGEHUOLIANGGEZONGJIEZHIBIAO。ZHEIXIESHIWEILEZAIDANGESHUZIZHONGCHUANDAGUANYUQUXIANDEZUIZHONGYAODEXINXI。CHANGJIANDELIZISHI：

• MTF10 ，MTF30 和MTF50 ：MTF曲线分别达到其归一化（DC）值的10％，30％和50％的频率值
• MTF50P ：MTF曲线达到其最大值的50 倍的频率值（如果存在锐化，则可以大于在DC中找到的值1）
• 在1/4和1/2奈奎斯特时的MTF：在奈奎斯特采样速率的一半和四分之一处的MTF值（分别为0.125和0.25个周期/像素）。
• MTF面积：从DC到0.5个周期/像素的MTF曲线下的面积，通常曲线归一化到峰值为1（不太常见）。

XIAMIANYIHECHENGDEWUZAOSHENGMTFQUXIANWEILIJINXINGSHUOMING。MTFMIANJIZHISHIQUXIANXIAMIANQIANHONGSEQUYUDEJIFEN。

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