Television lines (TVL) is a specification of an analog camera or monitor's horizontal image resolution. [1] The TVL is one of the most important resolution measures in a video system. The TVL can be measured with the standard EIA 1956 resolution chart .

TVL stands for television lines: a measure of an image’s resolution displayed by an analog monitor or recorded by an analog camera. TV lines measure resolution by counting the number of alternating black and white vertical lines displayed on a monitor/ video screen while remaining clear and defined.

2022年7月8日 · If you've been researching security cameras for a while, you have probably noticed that some cameras measure resolution using TVL (600TVL, 700TVL, 1000TVL) rather than 720p, 1080p, or Megapixels. This can be confusing and even misleading, which can make it very frustrating to figure out what you need for your home or business.

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2024年10月19日 · LW/PH（Line Widths per Picture Height，线宽每图像高） 给定的一个10x20mm的画幅，如果你纵向能填进去1000根线（且能够区分），横向能填进去2000根线，那么两个可分辨的像点间距就是10mm/1000=10μm,而此时对这个给定的画面，其lw/ph（纵）=1000lw/ph，lw/ph（横）=2000lw/ph。

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电视线（TVL）源自EIA 1956测试标准，它被定义为在屏幕高度上可见（即可区分）的明暗垂直线的数量。 TVL将 “线 “定义为明显的暗线和亮线。 这相当于线宽（LW），不应该与线对（LP）相混淆，后者代表一个完整的周期，即一条TV线相当于半个线对。 尽管TVL不是数字成像系统质量的最佳测量方法，但它对数字系统与老式模拟系统的比较很有用。 TVL的定义是有问题的，因为 “解决 “或 “可见 “并没有明确的定义。 没有对观看条件的描述，没有对代表 “亮 “和 “暗 “的对比度的 …

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