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In signal processing, a filter is a device or process that removes some unwanted components or features from a signal. Filtering is a class of signal processing, the defining feature of filters being the complete or partial suppression of some aspect of the signal. Most often, this means removing some frequencies or frequency bands. However, filters do not exclusively act in the frequency domain; especially in the field of image processing many other targets for filtering exist. Correlations can be removed for certain frequency components and not for others without having to act in the frequency domain. Filters are widely used in electronics and telecommunication, in radio, television, audio recording, radar, control systems, music synthesis, image processing, and computer graphics.

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  • مرشح (معالجة إشارة) (ar)
  • Filtre (audio) (fr)
  • Filter (signal processing) (en)
  • 필터 (신호 처리) (ko)
  • フィルタ (信号処理) (ja)
  • Filter (signalbehandling) (sv)
  • 濾波器 (zh)
rdfs:comment
  • مرشح في معالجة الإشارة هو الأداة أو المعالج الذي يقوم بإزالة الأجزاء غير المرغوبة من الإشارة. الترشيح هو أحد أشكال معالجة الإشارة، الميزة الأساسية للمرشح هي حذفه الكامل أو الجزئي لبعض أجزاء الإشارة، وأغلب الأحيان يدل ذلك على إزالة بعض الترددات من مجموعة ترددات الإشارة لا تعملُ المرشحات في المجال الترددي فقط، خاصة في معالجة الصورة العديد من الصور تكون بحاجة لتعديل وتصحيح بالعمل ضمن مجال آخر والحفاظ على المجال الترددي دون تغيير.تستخدم المرشحات بشكل رئيس في الإلكترونيات والاتصالات و أجهزة الرادار والتلفاز والراديو وأنظمة التحكم ومعالجة الصورة ورسوميات الحاسب والعديد من المجالات الأخرى (ar)
  • Dans le traitement du signal, un filtre est un appareil ou une fonction servant à retirer ou bien à accentuer ou réduire certaines parties du spectre sonore représentées dans un signal. Les filtres sont essentiels dans plusieurs fonctions des appareils électroniques (voir Filtre (électronique)). Nous ne traiterons ici que des filtres accessibles par des commandes dans les tranches des consoles de mixage et les égaliseurs qui permettent d'ajuster la tonalité des sons. (fr)
  • 信号処理において、フィルタは、不要なコンポーネントや機能を信号から削除する、デバイスまたはプロセスである。 (ja)
  • Ett filter är inom signalbehandling ett byggblock som ändrar en signals spektrala egenskaper. Man säger att signalen passerar ett filter. Filter används bland annat för att förhindra vikningsdistorsion eller aliasing vid omvandling av analoga signaler till digitala. (sv)
  • In signal processing, a filter is a device or process that removes some unwanted components or features from a signal. Filtering is a class of signal processing, the defining feature of filters being the complete or partial suppression of some aspect of the signal. Most often, this means removing some frequencies or frequency bands. However, filters do not exclusively act in the frequency domain; especially in the field of image processing many other targets for filtering exist. Correlations can be removed for certain frequency components and not for others without having to act in the frequency domain. Filters are widely used in electronics and telecommunication, in radio, television, audio recording, radar, control systems, music synthesis, image processing, and computer graphics. (en)
  • 신호 처리에서 필터(Filter)란 특정한 신호에서 원하지 않는 신호를 차단하거나 원하는 신호만 통과시키는 기능을 하는 장치나 그러한 과정을 의미한다. 필터 처리는 신호 처리의 일부로 보통 특정 진동수 대역의 신호를 차단하여 제거하는 방식으로 작동된다. 하지만 필터는 꼭 주파수 영역에서만 작동하는 것은 아니다. 특히 디지털 영상 처리와 같은 분야에서는 주파수 영역 외에도 세기 영역 같은 다양한 영역에서 필터를 적용한다. 신호 필터는 라디오, 텔레비전, 음성 녹음, 레이다, 제어 시스템, 신시사이저, 화상 처리, 컴퓨터 그래픽스 등 전자공학과 전기 통신 분야에 광범위하게 사용된다. 필터의 종류를 구분하는 데에는 매우 많은 방식이 있으며, 한 필터가 여러 종류에 속할 수도 있고 필터들을 전부 하나의 종류로 분류하는 계층적인 분류법은 없다. 필터를 구분하는 종류에는 다음과 같은 방식이 있다. (ko)
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