{"id":75129,"date":"2026-02-11T15:05:38","date_gmt":"2026-02-11T07:05:38","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/75129.html"},"modified":"2026-02-11T15:05:38","modified_gmt":"2026-02-11T07:05:38","slug":"%e4%bb%80%e4%b9%88%e6%98%afmtfmodulation-transfer-function%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/75129.html","title":{"rendered":"\u4ec0\u4e48\u662fMTF(Modulation Transfer Function)\uff1f"},"content":{"rendered":"

\u8c03\u5236\u4f20\u9012\u51fd\u6570（Modulation Transfer Function）<\/span><\/h3>\n

\u82f1\u6587\u7f29\u5199MTF，\u662f\u5149\u5b66\u5de5\u7a0b\u91cc\u7684\u4e00\u4e2a\u672f\u8bed，\u5e38\u7528\u4e8e\u8bc4\u4ef7\u955c\u5934（\u5149\u5b66\u7cfb\u7edf）\u7684\u6027\u80fd\u3002\u5728\u56fe\u50cf\u753b\u8d28\u9886\u57df，\u4e5f\u53ef\u7528\u4e8e\u8bc4\u4ef7\u56fe\u50cf\u6e05\u6670\u5ea6\u3002<\/p>\n

\u5206\u8fa8\u7387（resolution）：\u5206\u8fa8\u7387\u63cf\u8ff0\u4e86\u6210\u50cf\u7cfb\u7edf\u6062\u590d\u573a\u666f\u7ec6\u8282\u7684\u80fd\u529b，\u5e38\u7528\u6bcf\u6beb\u7c73\u6709\u591a\u5c11\u7ebf\u5bf9（line pair）\u8868\u793a，\u5355\u4f4d\u662flp\/mm，\u4e00\u4e2a\u7ebf\u5bf9\u7531\u4e00\u6761\u9ed1\u7ebf\u548c\u4e00\u6761\u767d\u7ebf\u7ec4\u6210\u3002<\/p>\n

\"\"<\/p>\n

\u5bf9\u6bd4\u5ea6（contrast）：\u5bf9\u6bd4\u5ea6\u8868\u793a\u56fe\u50cf\u4e2d\u660e\u6697\u533a\u57df\u7684\u5dee\u5f02，\u5f53\u56fe\u50cf\u7684\u9ed1\u8272\u90e8\u5206\u662f\u771f\u6b63\u7684\u9ed1\u8272\u800c\u767d\u8272\u90e8\u5206\u662f\u771f\u6b63\u7684\u767d\u8272\u65f6，\u56fe\u50cf\u5b8c\u6574\u5730\u8fd8\u539f\u4e86\u73b0\u5b9e\u573a\u666f，\u5176\u5bf9\u6bd4\u5ea6\u6700\u5927\u3002\u7136\u800c\u7531\u4e8e\u6210\u50cf\u7cfb\u7edf\u51fa\u73b0\u6a21\u7cca，\u4f1a\u5bfc\u81f4\u5bf9\u6bd4\u5ea6\u4e0b\u964d\u3002\u5176\u8ba1\u7b97\u516c\u5f0f\u4e3a：<\/p>\n

contrast=Imax\u2212IminImax+Imin<\/p>\n

\"\"<\/p>\n

MTF（modulation transfer function）：MTF\u7ed3\u5408\u4e86\u5206\u8fa8\u7387\u548c\u5bf9\u6bd4\u5ea6\u4e24\u79cd\u6307\u6807，\u8868\u793a\u4e86\u6210\u50cf\u7cfb\u7edf\u5c06\u5206\u8fa8\u7387\u8f6c\u6362\u4e3a\u5bf9\u6bd4\u5ea6\u7684\u80fd\u529b\u3002\u4ec0\u4e48\u610f\u601d\u5462，\u968f\u7740\u56fe\u50cf\u5206\u8fa8\u7387\u7684\u5347\u9ad8，\u5bf9\u6bd4\u5ea6\u4f1a\u4e0b\u964d，（\u5982\u4e0b\u56fe，\u4e0e\u4e0a\u56fe\u5bf9\u6bd4，1mm\u7684\u8ddd\u79bb\u5185\u7ebf\u5bf9\u66f4\u591a，\u56e0\u6b64\u6210\u50cf\u7cfb\u7edf\u9020\u6210\u7684\u6a21\u7cca\u5e26\u6765\u7684\u5f71\u54cd\u4e5f\u66f4\u4e25\u91cd，\u5bf9\u6bd4\u5ea6\u4f1a\u6bd4\u4e0a\u56fe\u66f4\u5dee），MTF\u8868\u793a\u4e86\u6210\u50cf\u7cfb\u7edf\u5728\u5206\u8fa8\u7387\u5347\u9ad8\u7684\u60c5\u51b5\u4e0b\u4fdd\u8bc1\u5bf9\u6bd4\u5ea6\u7684\u80fd\u529b\u3002<\/p>\n

\"\"<\/p>\n

\u80f6\u7247\u76f8\u673a\u955c\u5934\u6d4b\u8bd5\u4f7f\u7528\u7684\u7a7a\u95f4\u9891\u7387\u5355\u4f4d\u5e38\u4e3a\u7ebf\u5bf9\u6bcf\u6beb\u7c73（lp\/mm）\u3002\u5728\u6570\u5b57\u4f20\u611f\u5668\u4e3a\u4e3b\u8981\u611f\u5149\u5668\u4ef6\u7684\u6570\u5b57\u76f8\u673a\u4e2d，\u4f20\u611f\u5668\u5c3a\u5bf8\u53d8\u5316\u8f83\u5927，\u5e38\u5efa\u8bae\u4f7f\u7528\u7ebf\u5bbd\u6bcf\u50cf\u9ad8（LW\/PH）\u6765\u8868\u5f81\u76f8\u673a\u53ef\u590d\u5236\u7684\u7ec6\u8282\u3002\u5176\u4e2d，\u7ebf\u5bbd\u6bcf\u50cf\u9ad8\u4e0e\u7ebf\u5bf9\u6bcf\u6beb\u7c73\u4e4b\u95f4\u7684\u6362\u7b97\u516c\u5f0f\u4e3a：LW\/PH = 2 * lp\/mm * (\u7528\u6beb\u7c73\u8868\u793a\u7684picture height)\u3002\u53e6\u4e00\u5e38\u7528\u7684\u7a7a\u95f4\u9891\u7387\u5355\u4f4d\u4e3a：\u50cf\u7d20\u6bcf\u5468\u671f（cycles per pixel(C\/P)），\u8be5\u5355\u4f4d\u4e0d\u6d89\u53ca\u76f8\u673a\u7684\u957f\u5ea6\u5355\u4f4d\u3002<\/span><\/span><\/p>\n<\/p>\n

\u7a7a\u95f4\u9891\u7387\u5355\u4f4d（Spatial Frequency Units）<\/span><\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
MTF Unit\u00a0\u00a0MTF \u5355\u4f4d<\/td>\nApplication\u00a0\u00a0\u5e94\u7528<\/td>\nEquation\u00a0\u00a0\u516c\u5f0f<\/td>\n<\/tr>\n
\n

Cycles\/Pixel (C\/P)\u00a0\u00a0\u5468\u671f\/\u50cf\u7d20（C\/P）<\/p>\n<\/td>\n

Shows how well pixels are utilized. Nyquist frequency\u00a0fNyq\u00a0is always 0.5 C\/P. \u663e\u793a\u50cf\u7d20\u7684\u5229\u7528\u7387\u3002\u5948\u594e\u65af\u7279\u9891\u7387 f\u00a0Nyq\u00a0\u59cb\u7ec8\u4e3a 0.5 C\/P\u3002<\/td>\n\u00a0\u00a0<\/td>\n<\/tr>\n
\n

Cycles\/Distance\u00a0\u00a0\u5468\u671f\/\u8ddd\u79bb<\/p>\n

(cycles\/mm or cycles\/inch) (cycles\/mm \u6216 cycles\/inch)<\/p>\n<\/td>\n

Cycles per distance\u00a0on the sensor.\u00a0Pixel spacing or pitch must be entered.\u00a0Popular for comparing resolution in the old days of standard film formats (e.g., 24x36mm for 35mm film).<\/span> \u4f20\u611f\u5668\u4e0a\u7684\u6bcf\u5355\u4f4d\u8ddd\u79bb\u7684\u5468\u671f\u6570\u3002\u5fc5\u987b\u8f93\u5165\u50cf\u7d20\u95f4\u8ddd\u6216\u8282\u8ddd\u3002\u5728\u6807\u51c6\u80f6\u7247\u683c\u5f0f（\u4f8b\u5982，35mm \u80f6\u7247\u7684 24x36mm）\u7684\u65e7\u65f6\u4ee3，\u5e38\u7528\u4e8e\u6bd4\u8f83\u5206\u8fa8\u7387\u3002<\/span><\/td>\nMTF(C\/P)pixel pitch<\/td>\n<\/tr>\n
\n

Line Widths\/Picture Height (LW\/PH) \u7ebf\u5bbd\/\u56fe\u7247\u9ad8\u5ea6（LW\/PH）<\/p>\n

note:\u00a0for cropped images enter the original picture height into the more settings dimensions input \u6ce8\u610f：\u5bf9\u4e8e\u88c1\u526a\u7684\u56fe\u7247，\u5c06\u539f\u59cb\u56fe\u7247\u9ad8\u5ea6\u8f93\u5165\u5230\u201c\u66f4\u591a\u8bbe\u7f6e\u201d\u4e2d\u7684\u201c\u5c3a\u5bf8\u201d\u8f93\u5165\u6846\u4e2d\u3002<\/p>\n<\/td>\n

Measures overall image sharpness.\u00a0This is the best unit for comparing the performance of cameras with different sensor sizes and pixel counts.<\/span>\u00a0Line Widths is traditional for TV measurements. Recommended for image-centric applications in\u00a0Comparing sharpness in different cameras. \u6d4b\u91cf\u6574\u4f53\u56fe\u50cf\u6e05\u6670\u5ea6\u3002\u8fd9\u662f\u6bd4\u8f83\u4e0d\u540c\u4f20\u611f\u5668\u5c3a\u5bf8\u548c\u50cf\u7d20\u6570\u91cf\u76f8\u673a\u6027\u80fd\u7684\u6700\u4f73\u5355\u4f4d\u3002\u7ebf\u5bbd\u662f\u7535\u89c6\u6d4b\u91cf\u7684\u4f20\u7edf\u5355\u4f4d\u3002\u63a8\u8350\u7528\u4e8e\u56fe\u50cf\u4e2d\u5fc3\u5e94\u7528，\u4ee5\u6bd4\u8f83\u4e0d\u540c\u76f8\u673a\u7684\u6e05\u6670\u5ea6\u3002 Note that 1 Cycle = 1 Line Pair (LP) = 2 Line Widths (LW). \u6ce8\u610f：1 \u5468\u671f = 1 \u7ebf\u5bf9（LP）= 2 \u7ebf\u5bbd（LW）\u3002<\/td>\n2\u00d7MTF(LPPH)\u00a0; 2\u00d7MTF(CP)\u00d7PH<\/td>\n<\/tr>\n
\n

Line Pairs\/Picture Height\u00a0(LP\/PH) \u7ebf\u5bf9\/\u56fe\u50cf\u9ad8\u5ea6（LP\/PH）<\/p>\n

note:\u00a0for cropped images enter the original picture height into the more settings dimensions input \u6ce8\u610f：\u5bf9\u4e8e\u88c1\u526a\u56fe\u50cf，\u8bf7\u5c06\u539f\u59cb\u56fe\u50cf\u9ad8\u5ea6\u8f93\u5165\u5230\u66f4\u591a\u8bbe\u7f6e\u4e2d\u7684\u5c3a\u5bf8\u8f93\u5165\u6846\u3002<\/p>\n<\/td>\n

Measures overall image sharpness. Differs from LW\/PH by a factor of 2. Used by dpreview.com. \u6d4b\u91cf\u6574\u4f53\u56fe\u50cf\u6e05\u6670\u5ea6\u3002\u4e0e LW\/PH \u76f8\u6bd4，\u5dee\u5f02\u4e3a 2 \u500d\u3002\u7531 dpreview.com \u4f7f\u7528\u3002<\/td>\nMTF(LWPH)\/2\u00a0; MTF(CP)\u00d7PH<\/td>\n<\/tr>\n
\n

Angular frequency\u00a0\u00a0\u89d2\u9891\u7387<\/p>\n

Cycles\/milliradian\u00a0\u00a0\u5468\u671f\/\u6beb\u5f27\u5ea6<\/p>\n<\/td>\n

\n

Angular frequencies. Pixel spacing or pitch must be entered. Focal length (FL) in mm is usually included in EXIF data in commercial image files. If it isn\u2019t available it must be entered manually, typically in the EXIF parameters region at the bottom of the settings window. If pixel spacing or focal length is missing, units will default to Cycles\/Pixel. \u89d2\u9891\u7387\u3002\u5fc5\u987b\u8f93\u5165\u50cf\u7d20\u95f4\u8ddd\u6216\u8282\u8ddd\u3002\u5546\u4e1a\u56fe\u50cf\u6587\u4ef6\u4e2d\u7684 EXIF \u6570\u636e\u901a\u5e38\u5305\u542b\u4ee5\u6beb\u7c73\u4e3a\u5355\u4f4d\u7684\u7126\u8ddd（FL）\u3002\u5982\u679c\u4e0d\u53ef\u7528，\u5219\u5fc5\u987b\u624b\u52a8\u8f93\u5165，\u901a\u5e38\u5728\u8bbe\u7f6e\u7a97\u53e3\u5e95\u90e8\u7684 EXIF \u53c2\u6570\u533a\u57df\u3002\u5982\u679c\u50cf\u7d20\u95f4\u8ddd\u6216\u7126\u8ddd\u7f3a\u5931，\u5355\u4f4d\u5c06\u9ed8\u8ba4\u4e3a\u5468\u671f\/\u50cf\u7d20\u3002 Cycles\/degree is useful for comparing camera systems to the human eye, which has an MTF50 of roughly 20 Cycles\/Degree (depending on the individual\u2019s eyesight and illumination). \u5468\u671f\/\u5ea6\u5bf9\u4e8e\u6bd4\u8f83\u76f8\u673a\u7cfb\u7edf\u4e0e\u4eba\u773c（\u4eba\u773c\u5177\u6709\u7ea6 20 \u5468\u671f\/\u5ea6\u7684 MTF50，\u5177\u4f53\u53d6\u51b3\u4e8e\u4e2a\u4eba\u7684\u89c6\u529b\u72b6\u51b5\u548c\u7167\u660e\u6761\u4ef6）\u975e\u5e38\u6709\u7528\u3002<\/p>\n

FL\u00a0can be calculated from the simple lens equation*,\u00a01\/FL=1\/s1+1\/s2, where\u00a0s1\u00a0is the lens-to-chart distance (easy to measure),\u00a0s2\u00a0is the lens-to-sensor distance, and magnification\u00a0M=s2\/s1. \u7126\u8ddd FL \u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684\u900f\u955c\u516c\u5f0f*\u00a01\/FL=1\/s1+1\/s2\u00a0\u8ba1\u7b97\u5f97\u51fa，\u5176\u4e2d s\u00a01\u00a0\u662f\u900f\u955c\u5230\u56fe\u8868\u7684\u8ddd\u79bb（\u6613\u4e8e\u6d4b\u91cf），s\u00a02\u00a0\u662f\u900f\u955c\u5230\u4f20\u611f\u5668\u7684\u8ddd\u79bb，\u4ee5\u53ca\u653e\u5927\u7387\u00a0M=s2\/s1\u00a0\u3002<\/p>\n

FL=s1\/(1+1\/|M|)\u00a0=\u00a0s2\/(1+|M|)<\/p>\n

*Unless\u00a0s1\u00a0>>\u00a0s2, (by 100\u00d7 or more), lens geometry (s1,\u00a0s2, and\u00a0FL) is\u00a0not\u00a0reliable for calculating\u00a0M\u00a0because lenses can\u00a0deviate significantly from the simple lens equation. *\u9664\u975e s\u00a01\u00a0>> s\u00a02\u00a0（\u653e\u5927 100 \u500d\u6216\u66f4\u591a），\u5426\u5219\u955c\u5934\u51e0\u4f55\u5f62\u72b6（s\u00a01\u00a0，s\u00a02\u00a0，\u4ee5\u53ca FL）\u5bf9\u4e8e\u8ba1\u7b97 M \u662f\u4e0d\u53ef\u9760\u7684，\u56e0\u4e3a\u955c\u5934\u4f1a\u663e\u8457\u504f\u79bb\u7b80\u5355\u7684\u955c\u5934\u65b9\u7a0b\u3002<\/p>\n<\/td>\n

\n

\n

0.001\u00d7MTF(cyclesmm)\u00d7FL(mm)<\/p>\n<\/td>\n<\/tr>\n

\n

\n

Cycles\/degree\u00a0\u00a0\u5468\u671f\/\u5ea6<\/p>\n<\/td>\n

\n

\n

\u03c0180\u00d7MTF(cyclesmm)\u00d7FL(mm)<\/p>\n<\/td>\n<\/tr>\n

\n

Cycles\/object mm\u00a0\u00a0\u5468\u671f\/\u7269\u4f53 \u6beb\u7c73 Cycles\/object in\u00a0\u00a0\u5468\u671f\/\u7269\u4f53 \u82f1\u5bf8<\/p>\n<\/td>\n

\n

Cycles per distance\u00a0on the object being photographed\u00a0(what some people think of as the \u201csubject\u201d). Pixel spacing must be entered, and either: \u88ab\u62cd\u6444\u7269\u4f53\u4e0a\u7684\u6bcf\u5355\u4f4d\u8ddd\u79bb\u7684\u5468\u671f\u6570（\u6709\u4e9b\u4eba\u79f0\u4e4b\u4e3a\u201c\u4e3b\u4f53\u201d）\u3002\u5fc5\u987b\u8f93\u5165\u50cf\u7d20\u95f4\u8ddd，\u7136\u540e：<\/p>\n

  • The magnification must be entered for SFR or SFRreg \u5bf9\u4e8e SFR \u6216 SFRreg，\u5fc5\u987b\u8f93\u5165\u653e\u5927\u500d\u7387<\/li>\n
  • A target that computes magnification using geometry and lens-to-chart distance such as SFRplus, eSFR ISO or checkerboard must be used\u00a0see this post for details. \u4e00\u4e2a\u4f7f\u7528\u51e0\u4f55\u5b66\u548c\u955c\u5934\u5230\u56fe\u8868\u8ddd\u79bb\u8ba1\u7b97\u653e\u5927\u500d\u6570\u7684\u9776\u6807，\u4f8b\u5982 SFRplus\u3001eSFR ISO \u6216\u68cb\u76d8\u683c\u9776\u6807\u5fc5\u987b\u88ab\u4f7f\u7528，\u8be6\u7ec6\u4fe1\u606f\u8bf7\u53c2\u9605\u6b64\u5e16\u6587\u3002<\/li>\n

    For object-centric applications see\u00a0Comparing sharpness in different cameras. \u5bf9\u4e8e\u4ee5\u7269\u4f53\u4e3a\u4e2d\u5fc3\u7684\u5e94\u7528，\u8bf7\u53c2\u9605\u6bd4\u8f83\u4e0d\u540c\u76f8\u673a\u7684\u9510\u5ea6\u3002<\/p>\n<\/td>\n

    		• \n

    MTF(CyclesDistance)\u00d7|Magnification|<\/p>\n

    Cycles\/distance is Cycles\/mm or Cycles\/in\u00a0on the image sensor. \u5468\u671f\/\u8ddd\u79bb\u5728\u56fe\u50cf\u4f20\u611f\u5668\u4e0a\u662f\u5468\u671f\/\u6beb\u7c73\u6216\u5468\u671f\/\u82f1\u5bf8\u3002<\/p>\n<\/td>\n<\/tr>\n

    \n

    Line Widths\/Crop Height\u00a0\u00a0\u7ebf\u5bbd\/\u88c1\u526a\u9ad8\u5ea6 Line Pairs\/Crop Height\u00a0\u00a0\u7ebf\u5bf9\u6570\/\u88c1\u526a\u9ad8\u5ea6<\/span><\/p>\n<\/td>\n

    		Primarily used for testing when the active chart height (rather than the total image height) is significant. No longer recommended because it\u2019s dependent on the crop size, which is not standardized. \u4e3b\u8981\u7528\u4e8e\u6d4b\u8bd5\u5f53\u6d3b\u52a8\u56fe\u8868\u9ad8\u5ea6（\u800c\u4e0d\u662f\u603b\u56fe\u50cf\u9ad8\u5ea6）\u5f88\u91cd\u8981\u65f6\u3002\u4e0d\u518d\u63a8\u8350，\u56e0\u4e3a\u5b83\u4f9d\u8d56\u4e8e\u88c1\u526a\u5927\u5c0f，\u800c\u88c1\u526a\u5927\u5c0f\u6ca1\u6709\u6807\u51c6\u5316\u3002<\/span><\/td>\n<\/td>\n<\/tr>\n
    \n

    Line Widths\/\u00a0\u00a0\u7ebf\u5bbd\/ Feature Ht (Px)\u00a0\u00a0\u7279\u5f81\u9ad8\u5ea6（\u50cf\u7d20） Line Pairs\/\u00a0\u00a0\u7ebf\u5bf9\/ Feature Ht (Px)\u00a0\u00a0\u7279\u5f81\u9ad8\u5ea6（\u50cf\u7d20）<\/p>\n

    (formerly Line Widths or Line Pairs\/N Pixels (PH)) （\u66fe\u7528\u7ebf\u5bbd\u6216\u7ebf\u5bf9\u6570\/\u50cf\u7d20（PH））<\/p>\n<\/td>\n

    		When either of these is selected, a\u00a0Feature Ht pixels\u00a0box appears to the right of the\u00a0MTF plot units\u00a0(sometimes used for Magnification)\u00a0that lets you enter a feature height in pixels, which could be the height of a monitor under test, a test chart, or the active field of view in an image that has an inactive area. This unit selection is useful for comparing the resolution of specific objects for cameras with different image or pixel sizes. Recommended for object-centric applications in\u00a0Comparing sharpness in different cameras. \u5f53\u9009\u62e9\u5176\u4e2d\u4e4b\u4e00\u65f6，MTF \u56fe\u5355\u4f4d\u53f3\u4fa7\u4f1a\u51fa\u73b0\u4e00\u4e2a\u7279\u5f81\u9ad8\u5ea6\u50cf\u7d20\u6846，\u5141\u8bb8\u8f93\u5165\u50cf\u7d20\u503c\u7279\u5f81\u9ad8\u5ea6，\u8fd9\u53ef\u4ee5\u662f\u6d4b\u8bd5\u663e\u793a\u5668\u7684\u9ad8\u5ea6\u3001\u6d4b\u8bd5\u56fe\u8868\u6216\u5177\u6709\u975e\u6d3b\u52a8\u533a\u57df\u56fe\u50cf\u7684\u4e3b\u52a8\u89c6\u573a\u3002\u6b64\u5355\u4f4d\u9009\u62e9\u9002\u7528\u4e8e\u6bd4\u8f83\u4e0d\u540c\u56fe\u50cf\u6216\u50cf\u7d20\u5c3a\u5bf8\u76f8\u673a\u7684\u7279\u5b9a\u5bf9\u8c61\u5206\u8fa8\u7387\u3002\u63a8\u8350\u7528\u4e8e\u6bd4\u8f83\u4e0d\u540c\u76f8\u673a\u4e2d\u7269\u4f53\u4e2d\u5fc3\u5e94\u7528\u7684\u9510\u5ea6\u3002<\/td>\n\n

    2\u00d7MTF(CP)\u00d7Feature Height<\/p>\n

    MTF(CP)\u00d7Feature Height<\/p>\n<\/td>\n<\/tr>\n

    \n

    PH\u00a0= Picture Height in pixels.\u00a0FL(mm)\u00a0= Lens focal length in mm.\u00a0\u00a0Pixel pitch\u00a0= distance per pixel = 1\/(pixels per distance). \u00a0 \u50cf\u7d20\u9ad8\u5ea6（\u4ee5\u50cf\u7d20\u4e3a\u5355\u4f4d）\u3002\u7126\u8ddd（\u6beb\u7c73）= \u955c\u5934\u7126\u8ddd（\u6beb\u7c73）\u3002\u50cf\u7d20\u95f4\u8ddd = \u6bcf\u50cf\u7d20\u8ddd\u79bb = 1\/（\u6bcf\u5355\u4f4d\u8ddd\u79bb\u7684\u50cf\u7d20\u6570）\u3002<\/span> Note: Different units scale differently with image sensor and pixel size. \u6ce8\u610f：\u4e0d\u540c\u5355\u4f4d\u5728\u56fe\u50cf\u4f20\u611f\u5668\u548c\u50cf\u7d20\u5c3a\u5bf8\u4e0a\u7684\u7f29\u653e\u65b9\u5f0f\u4e0d\u540c\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n\n\n
    \n

    MTF\u5355\u4f4d\n <\/td>\n

    		\n

    \u5e94\u7528\n <\/td>\n

    		\n

    \u7b49\u5f0f\n <\/td>\n<\/tr>\n

    \n

    Cycles\/Pixel (C\/P)\n <\/td>\n

    		\n

    \u5948\u594e\u65af\u7279\u9891\u7387\u4e3afNyq \u901a\u5e38\u4e3a0.5 C\/P\u3002\n <\/td>\n

    		\n <\/td>\n<\/tr>\n
    Cycles\/Distance (cycles\/mm \u6216cycles\/inch)<\/td>\n\n

    \u4f20\u611f\u5668\u6bcf\u5355\u4f4d\u957f\u5ea6\u6240\u5305\u542b\u7684\u5468\u671f\u6570\u3002\u5fc5\u987b\u8981\u8f93\u5165\u50cf\u7d20\u95f4\u9694\u3002\n <\/td>\n

    		\n

    MTF(C\/P) \/\u50cf\u7d20\u95f4\u9694\n <\/td>\n<\/tr>\n

    \n

    Line Widths\/Picture Height (LW\/PH)\n <\/td>\n

    		\n

    \u6d4b\u91cf\u6574\u5e45\u56fe\u50cf\u7684\u56fe\u50cf\u6e05\u6670\u5ea6\u30021 Cycle = 1 Line Pair (LP) = 2 Line Widths (LW)\n <\/td>\n

    		\n

    2 * MTF(LP\/PH) 2 * MTF(C\/P) * PH\n <\/td>\n<\/tr>\n

    \n

    Line Pairs\/Picture Height (LP\/PH)\n <\/td>\n

    		\n

    \u6d4b\u91cf\u6574\u4e2a\u56fe\u50cf\u6e05\u6670\u5ea6，\u8be5\u5355\u4f4d\u53ef\u5728dpreview\u8bc4\u6d4b\u7f51\u7ad9\u4e2d\u7ecf\u5e38\u89c1\u5230\n <\/td>\n

    		\n

    MTF(LW\/PH) \/ 2 MTF(C\/P) * PH\n <\/td>\n<\/tr>\n

    \n

    Cycles\/milliradian\n <\/td>\n

    		\n

    \u89d2\u9891\u7387\u3002\u5fc5\u987b\u952e\u5165\u50cf\u7d20\u95f4\u9694\u4e0e\u7126\u8ddd（Focal length）\u3002\u901a\u5e38\u7126\u8ddd\u5728\u56fe\u50cf\u7684EXIF\u6587\u4ef6\u4e2d\u90fd\u53ef\u770b\u5230，\u5982\u679c\u6ca1\u6709\u9700\u8981\u624b\u52a8\u952e\u5165\u3002\u5426\u5219，\u9ed8\u8ba4\u5355\u4f4d\u662fCycles\/Pixel\u3002\n <\/td>\n

    		\n

    0.001 * MTF(cycles\/mm) * (lens focal length in mm)\n <\/td>\n<\/tr>\n

    \n

    Cycles\/degree\n <\/td>\n

    		\n

    \u89d2\u9891\u7387\u3002\u5fc5\u987b\u952e\u5165\u50cf\u7d20\u95f4\u9694\u4e0e\u7126\u8ddd（Focal length）\u3002\u901a\u5e38\u7126\u8ddd\u5728\u56fe\u50cf\u7684EXIF\u6587\u4ef6\u4e2d\u90fd\u53ef\u770b\u5230，\u5982\u679c\u6ca1\u6709\u9700\u8981\u624b\u52a8\u952e\u5165\u3002\u901a\u5e38\u7528\u4e8e\u5c06\u76f8\u673a\u7cfb\u7edf\u4e0e\u4eba\u773c\u6bd4\u8f83\u7684\u8fc7\u7a0b，\u4eba\u773cMTF50\u901a\u5e38\u7ea6\u4e3a20 Cycles\/Degree（\u53d7\u4e2a\u4eba\u89c6\u529b\u548c\u5149\u7167\u5f71\u54cd）\u3002\n <\/td>\n

    		\n

    \u03c0\/180 * MTF(cycles\/mm) * (lens focal length in mm)\n <\/td>\n<\/tr>\n

    \n

    Cycles\/object mm Cycles\/object in\n <\/td>\n

    		\n

    \u62cd\u6444\u7269\u4f53\u957f\u5ea6\u8303\u56f4\u5185\u7684\u5468\u671f\u6570\u3002\u5fc5\u987b\u952e\u5165\u50cf\u7d20\u95f4\u9694\u4e0e\u653e\u5927\u7387\u3002\u5f53\u7cfb\u7edf\u89c4\u8303\u53c2\u7167\u88ab\u6444\u7269\u4f53\u65f6（\u4f8b\u5982，\u5982\u679c\u9700\u8981\u68c0\u6d4b\u67d0\u4e2a\u5bbd\u5ea6\u7684\u88c2\u7f1d）\u5c31\u5f88\u91cd\u8981\u4e86\u3002\n <\/td>\n

    		\n

    MTF(Cycles\/ Distance) * |Magnification|\n <\/td>\n<\/tr>\n

    \n

    Line Widths\/Crop Height Line Pairs\/Crop Height\n <\/td>\n

    		\n

    \u6d4b\u8bd5\u5361\u9ad8\u5ea6（\u800c\u4e0d\u662f\u6574\u4e2a\u56fe\u50cf\u9ad8\u5ea6）\u5f88\u91cd\u8981\u65f6\u4f7f\u7528\n <\/td>\n

    		\n <\/td>\n<\/tr>\n
    PH== Picture Height in pixels（\u7528\u50cf\u7d20\u6570\u8868\u793a\u7684\u56fe\u50cf\u9ad8\u5ea6）\u3002Pixel pitch = distance per pixel = 1\/(pixels per distance)\u3002\u56fe\u50cf\u4f20\u611f\u5668\u4e0e\u50cf\u7d20\u5c3a\u5bf8\u4e0d\u540c，\u4e0d\u540c\u5355\u4f4d\u5927\u5c0f\u4e0d\u540c\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \n","protected":false},"excerpt":{"rendered":"

    \u8c03\u5236\u4f20\u9012\u51fd\u6570（Modulation Transfer Function）
    \n\u82f1\u6587\u7f29\u5199MTF，\u662f\u5149\u5b66\u5de5\u7a0b\u91cc\u7684\u4e00\u4e2a\u672f\u8bed，\u5e38\u7528\u4e8e\u8bc4\u4ef7\u955c\u5934（\u5149\u5b66\u7cfb\u7edf）\u7684\u6027\u80fd\u3002\u5728\u56fe\u50cf\u753b\u8d28\u9886\u57df，\u4e5f\u53ef\u7528\u4e8e\u8bc4\u4ef7\u56fe\u50cf\u6e05\u6670\u5ea6\u3002
    \n\u5206\u8fa8\u7387（resolution）：\u5206\u8fa8\u7387\u63cf\u8ff0\u4e86\u6210\u50cf\u7cfb\u7edf\u6062\u590d\u573a\u666f\u7ec6\u8282\u7684\u80fd\u529b，\u5e38\u7528\u6bcf\u6beb\u7c73\u6709\u591a\u5c11\u7ebf\u5bf9（line pair&#x<\/p>\n","protected":false},"author":2,"featured_media":75126,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[7963,3829,5557],"topic":[],"class_list":["post-75129","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-mtf","tag-3829","tag-5557"],"yoast_head":"\n\u4ec0\u4e48\u662fMTF(Modulation Transfer Function)\uff1f - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/75129.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4ec0\u4e48\u662fMTF(Modulation Transfer Function)\uff1f - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u8c03\u5236\u4f20\u9012\u51fd\u6570（Modulation Transfer Function） \u82f1\u6587\u7f29\u5199MTF，\u662f\u5149\u5b66\u5de5\u7a0b\u91cc\u7684\u4e00\u4e2a\u672f\u8bed，\u5e38\u7528\u4e8e\u8bc4\u4ef7\u955c\u5934（\u5149\u5b66\u7cfb\u7edf）\u7684\u6027\u80fd\u3002\u5728\u56fe\u50cf\u753b\u8d28\u9886\u57df，\u4e5f\u53ef\u7528\u4e8e\u8bc4\u4ef7\u56fe\u50cf\u6e05\u6670\u5ea6\u3002 \u5206\u8fa8\u7387（resolution）：\u5206\u8fa8\u7387\u63cf\u8ff0\u4e86\u6210\u50cf\u7cfb\u7edf\u6062\u590d\u573a\u666f\u7ec6\u8282\u7684\u80fd\u529b，\u5e38\u7528\u6bcf\u6beb\u7c73\u6709\u591a\u5c11\u7ebf\u5bf9（line pair&#x\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/75129.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-11T07:05:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260211070537-698c2a4101d37.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/75129.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/75129.html\",\"name\":\"\u4ec0\u4e48\u662fMTF(Modulation Transfer Function)\uff1f - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-02-11T07:05:38+00:00\",\"dateModified\":\"2026-02-11T07:05:38+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/75129.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/75129.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/75129.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u4ec0\u4e48\u662fMTF(Modulation Transfer Function)\uff1f\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u4ec0\u4e48\u662fMTF(Modulation Transfer Function)\uff1f - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/75129.html","og_locale":"zh_CN","og_type":"article","og_title":"\u4ec0\u4e48\u662fMTF(Modulation Transfer Function)\uff1f - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u8c03\u5236\u4f20\u9012\u51fd\u6570（Modulation Transfer Function） \u82f1\u6587\u7f29\u5199MTF，\u662f\u5149\u5b66\u5de5\u7a0b\u91cc\u7684\u4e00\u4e2a\u672f\u8bed，\u5e38\u7528\u4e8e\u8bc4\u4ef7\u955c\u5934（\u5149\u5b66\u7cfb\u7edf）\u7684\u6027\u80fd\u3002\u5728\u56fe\u50cf\u753b\u8d28\u9886\u57df，\u4e5f\u53ef\u7528\u4e8e\u8bc4\u4ef7\u56fe\u50cf\u6e05\u6670\u5ea6\u3002 \u5206\u8fa8\u7387（resolution）：\u5206\u8fa8\u7387\u63cf\u8ff0\u4e86\u6210\u50cf\u7cfb\u7edf\u6062\u590d\u573a\u666f\u7ec6\u8282\u7684\u80fd\u529b，\u5e38\u7528\u6bcf\u6beb\u7c73\u6709\u591a\u5c11\u7ebf\u5bf9（line pair&#x","og_url":"https:\/\/www.wsisp.com\/helps\/75129.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-02-11T07:05:38+00:00","og_image":[{"url":"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260211070537-698c2a4101d37.png"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"5 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/75129.html","url":"https:\/\/www.wsisp.com\/helps\/75129.html","name":"\u4ec0\u4e48\u662fMTF(Modulation Transfer Function)\uff1f - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2026-02-11T07:05:38+00:00","dateModified":"2026-02-11T07:05:38+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/75129.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/75129.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/75129.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"\u4ec0\u4e48\u662fMTF(Modulation Transfer Function)\uff1f"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/75129","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=75129"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/75129\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media\/75126"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=75129"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=75129"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=75129"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=75129"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}