Matrix

ff1e8db80addafe01df7f38ed8efc76b88584c8b687473db66c159aa9c47290fc0c6c0c85b3f203d0ff6a65b47da248e2123130b3e9706850aaa42ce7d90fb7e60165b7e5724f026b86132f884de44da4f2639d32dae7f569027ae8479e9a317e0a1f15efe72c4cba6c9f2bd787baa395e028a6bfc0d85689f995a994f6ef919c0116ddfd02a8c31e38e9633739cea61d22e6bb79905e099e89b000195543c54ad2cfa365bd8cc758e256cd1e62448ca22c3715a1a2c146b2c1e74fb2ad5bfbbef25c8e5d97ca8a93fb917e55e8b6b496c4f58ff1b4ba70dc1c70b0c335d8e15e11b496bc2065a9e0daabd99191271b24c1683109c40dadb5 ...

ff1e8db80addafe01df7f38ed8efc76b88584c8b687473db66c159aa9c47290f063bbaa16e30c27aaf49b24bdaeaffcf85c5c3a184752eba0136c4977bb408c15d2013bd6b7a8806037b604ea9e29f6100c64261f4d8bc78226085279a8ca3d7328cfc69b5b4c36fb79799aa0f8be9182f01d9334fa961c75322ed7ec5f768563f60251403c62029f7ddddb8ca0295b3f03cae19faa0d924c5825955afaf7ec6ffdf6a9afc8e3460bff9fd1c7e990578d75f07614a445ec413b11d58322964ef09f9994b92364203fdbe74018f2684ee5280f9e7c52de852eb8e5e1de332b91798f9c3e405e94341cbaaea20a1fe3aea2144c7e91aa5252de ...

ff1e8db80addafe01df7f38ed8efc76b88584c8b687473db66c159aa9c47290faf26939c24d2a657f619f603f8aa76e217dd366fb270686d2cc283a3ce77f4783c5d002f83b4c6454b471701111c0200c1d7a47dbc30c715782f4fc0edf1e112f881d86b86734ac3827231ad3b0c8fd75200ee8f26fc4ea69552eb83f8d27572d82e1497c03323ba1a5dcaf8a32273f82657e458e590a5a21f7cb8e94f8d0622f886a49df1d21a9e85bcdbaec7325b47ac8f20aefbc1c20fd0ba4715ab789cf05b9fcc790dd962d8aacbc76e3c3ea347ca9cab81af06eccb863ee2e0254598bf1f83e01cbce4290501d1517ddaa0d4d50cff3b6202aa304b0 ...

ff1e8db80addafe01df7f38ed8efc76b88584c8b687473db66c159aa9c47290fdc74e2405f2c5d60f15c74a04148de19ec97868125cc5a9f8028fe0ce5dbf55e8bb959a7a48ced81fb34ca287cde4fe58a1919156f7b36f9e276a342731434eba10cefa18f8ffb48cf29b73733bc22eddf9723b3a7015f416b754df1a60cacb9ebd32212dabb35b01008fa1326fd44649d428e8908017f6cabb75c946fbfa1ee6fd5b4349d4fe2bca70f465c48d687ff49b798f7539842f67087de40a818ff3a8b20ef243dc709adb786d5562194a57600382ca25109019f774b986b3716bfc3a7c61aafc1593b361e9e8460241d0d098f49ad38d852526ba ...

ff1e8db80addafe01df7f38ed8efc76b88584c8b687473db66c159aa9c47290feb6fde87fc5392255a6198e12abcf0e5ac2c44f9c9dd07f3ac79f50406c175c275bfc5020968a8cfd840663a040997d58bb860695a5569b8d392fd9558f4acba09609550e86d2f70390f4df7c6cb2b30e9411193d0a12fd88a8cbf7b7257cd7fa1e5ddcfc0d70e01aab230d79e2f18c829fde42c45ad961c0cf229dff212c2a24d5893e5fb7072240c2140477ce4ee4504882ee223ca242852c542cfbd026b950d421187e2e7b00ff1936845c2f4d4157cd0a0223c90619fba0ab4496cd631e06633ca8d72839ccef4500aefeb566b9e3f1e74f90d4b8a52f ...

对焦和变焦 对焦 对焦（聚焦）就是把成的像准确的落在 sensor（camera 传感器）上，对焦有两种：自动对焦，手动对焦。 虚线是 sensor 的位置，当虚线落在像的位置上就是对焦完成。 变焦 光学变焦：就是改变透镜的焦距。由于改变了焦距，视场角也就变了，就可以实现拉近拉远的功能。 数码变焦：数码变焦过的的图像会出现失真，因为放大的过程会对图像进程插值。 反差对焦 CDAF(Contrast Detection Auto Focus) 光路结构比 PDAF 简单很多。它不需要额外的光学棱镜，不需要微透镜，也不需要额外的电路构造。它用软件算法直接分析 sensor 捕捉的主图像就可以判断图像是否聚焦良好。 原理 CDAF 对一个图像序列进行分析，找到对比度最大的一帧图，这个方法也叫做最大值法（maximum-seeking method）。 最大值法的优缺点都很明显。其优点是仅需要考虑聚焦点附近一个小区域的像素，因此计算压力比较小，对于手持应用可以节省功耗。其缺点是需要抓拍多帧图像。如果只给一帧图像，CDAF 算法无从知晓当前图像是否聚焦良好，也不知道距离理 ...

ff1e8db80addafe01df7f38ed8efc76b860176658e9b51797d900f394f1fceaf4b9746d24e87f274cafc59b6c8f732b7a325606e40a16b22e9cb80eecfd8758d437ffbdcf777bffa5279c3c6edd53321bfd5fcb00183a46208ce275453ae606af5806f8392c688d7a75f49b5f975eb18996054191c4c72ba3d5b335e76a1922165debb10ef0b2eefb5c82469e2eb84e86c1f0b7f6cdbdbaca085569954b970b258b8f5d7668305267fe6a1cf642bfc8457fb28a46484a243d2c4ee75fdbe5d3eeaae34c5507cbcf1705f779772a4e35eaf8f5d8774db7cbf62e01104f2841999e3bb636be294ebd76661aba793143e75334b4485af859c553 ...

ff1e8db80addafe01df7f38ed8efc76b88584c8b687473db66c159aa9c47290f1a289d42a1621e16dc34c48d60795af8c9b1299817f3bf4be8984e2349190cba40d2ea92d6cde3159126ceb4ff8ef31274eac7486c11888c3dd7e9a6007d78f19bec024003e060aa6491408bdd229b125ae6778833076a74fa18a4c12099830bfd8f501f74aec775d8b5e19f24dbe3521d4ebc446fb562bb2367360841035b1f49e01164d1c489d7e322a642e6475c4d600fc6d565b155341ba7a70b056cee9afeb5539e5e4ee86333427bc73daec74d84a6130e9e0e321b084cfa6f02506e119f5f76ecae6dc9ba2bc3160e2407cd3d9b9373bb4c35ae2f5 ...

ff1e8db80addafe01df7f38ed8efc76b88584c8b687473db66c159aa9c47290fbf48bdcd4165415b6d250870e3d158733d89c0094982a22788e7ee96cff59d46bd65cfa20552fe0936755331698c62732f066c9d6ad902a99d5fb7fb0e12161e054af434ba96be82102b88ab2849eea476764121aa9cb4ce4eba16a7f1fc30fbb9721300da2d57d3c26bf1da8821ecb3f1ddac485a2bb40ddf760f58deb2dcb19bc8614961c8904ef35b7f7cc9661b0afceb5b9ba1590da8952035f28a89794e790693f1c4c39094bc3397436d5b5aba0520209292a6e9c9b42712357c22d6b6daf7f59cc8a8cfb579696e6cbca5f34828484531de91ccc86 ...

ff1e8db80addafe01df7f38ed8efc76b88584c8b687473db66c159aa9c47290f440c29c6d9a9adb690e77426d5f4dd3f5f42fff2b96e3531550d43d728055c4e7656d23cd43a92b35d15a0a8fec4442c8d92d6b2e50cba19717a9ce01141e5c9faf67226cfc036c9aa17ac2b5acc297d4e60dfe63468302ff4f31484e3d957843ab649b35d779c9fb0ead118e2fe3d29b9c287cc546d1caa8fd2e6ba4d01f5ef8fac7e194f82a4d0894f5ce087a36481471ebc48018c66af11005e8729e2853bff17c9cdefbe02a85282559fc9653f79aebc33de285ac1f72a0c9e9f5934b5c277d10249a4d2d400fb40f8a23f976e28972675e23dc6727c9 ...