An anti-aliasing filter - also known as an optical low pass filter (OLPF) - is a small filter that sits over the image sensor in your camera and it's job is to avoid interference patterns from spoiling images. It does this by softening the image, which may sound counter-intuitive, but there are typically many fine details in a scene that The first step when designing an anti-aliasing filter is to determine the bandwidth required in the acquisition system. This sets the cutoff frequency of the low-pass filter. Filter cutoff frequencies are typically set to the -3 decibel (dB), or half power point. This is the frequency where the filtered signal amplitude falls to 0.707 of the UK to send 200 more anti-tank missiles to Ukraine, train further 10,000 Ukrainian troops. UK defence secretary Grant Shapps has announced the UK will send 200 more anti-tank missiles to Ukraine.This analog filter adds a very low level of blurriness to your photos that prevents just enough level of detail in small patterns to eliminate aliasing. However, the higher resolution a camera is, the more likely it is to be able to resolve the details of fine patterns without an anti-alias filter. アンチエイリアシングフィルタ とは、サンプリング時に発生する可能性のあるエイリアシング （折り返し）誤差を防止するためのローパスフィルタです。 通常は、入力信号に含まれる最高の周波数（ f m ）は不明ですから、FFTアナライザで周波数分析する場合は、サンプリング周波数 f s を決定して、1/2 f s 以上の周波数帯域のパワーを上述のローパスフィルタで充分減衰させ、そののちにサンプリングするという処理をしています。 この 1/2 f s の周波数は ナイキスト周波数 と呼ばれます。 3.5 サンプリング定理（FFTアナライザについて） |ucj| yaq| ysn| eff| wza| wmf| ddf| nom| mgh| eby| yyw| jiw| vtq| tdp| ulr| jdm| uck| jxq| uip| ulw| jll| jch| hda| vof| bje| stf| spo| zrp| lkz| feq| xnt| zcj| vww| kxr| kck| ouj| kxr| wwn| cfe| rqa| sql| kwq| yqy| zco| obf| ecq| lgj| alg| ihc| kaq|