DPI 或每英寸点数是一个主要与打印机(printers)相关的术语。这是打印机在一平方英寸内可以放置多少个点，它决定了打印机可以产生的细节。那么这与光学鼠标有什么关系呢？鼠标上的DPI到底是什么？
DPI 与 CPI
(DPI)当我们谈论光学鼠标时，DPI不是正确的术语。相反，CPI或每英寸计数(Counts Per Inch )是我们真正要处理的。但是，这些术语可以互换使用，因此您在鼠标上看到哪个并不重要。严格来说，它们的含义并不相同，但出于我们的目的，只是假装它们是相同的。那么，这些测量值意味着什么？
DPI/CPI越高，您必须进行的移动越小，鼠标才能获取任何更改。这使鼠标更精确，但也使其更灵敏。您将鼠标的DPI设置得越高，鼠标在现实生活中每移动一英寸，它在屏幕上的移动速度就会越快。
我们将在本文的其余部分使用更常见的DPI术语，但无论您使用哪个术语，数字越大意味着鼠标越准确和灵敏。
轮询率与 DPI
DPI与另一个称为“轮询率”的规范一起被提及，以赫兹为单位。虽然DPI确定鼠标对移动的敏感度有多精细，但轮询率衡量的是鼠标检查其传感器是否有变化的频率。
轮询率越高，鼠标对您的输入的反应就越迅速。换句话说，投票率低的老鼠可能会感到迟钝。除了基本的办公室生产力工作之外，这对任何事情都不是很好。
某些游戏鼠标可让您调整轮询速率并提供 125Hz、500Hz 和 1000Hz 等设置。当然，最佳轮询率取决于您喜欢如何使用鼠标，因此您应该自己测试可用的选项。
轮询率不是游戏之外的基本规范。将轮询率设置得太高实际上会在某些具有低端CPU(CPUs)的系统中引入延迟。
DPI 与灵敏度设置
大多数鼠标不允许您更改光学传感器的DPI ，但您仍然可以在(DPI)Windows中更改鼠标指针的灵敏度。这表明DPI和灵敏度不一定是一回事。
这种灵敏度变化是可能的，因为鼠标驱动程序可以夸大鼠标指针移动的距离与其真实DPI相比。这有助于补偿固定DPI无法提供所需灵敏度的鼠标。
什么时候调整 DPI？
大多数用户会对400-1200的标准(400-1200)DPI范围感到满意。即使是 400 DPI鼠标在Microsoft 365和其他生产力应用程序等应用程序中也感觉良好。
尽管如此，市场上仍有提供高DPI数字的鼠标。您会看到诸如 4000、8000、12000、20000 甚至更高的数字！这些老鼠是给谁的？目标市场是竞技游戏(competitive gaming)。
这个想法是高DPI鼠标允许更快的反应和更精确的瞄准。在实践中，真正的职业游戏玩家倾向于将DPI设置在 400-800 之间。但是，一些游戏玩家更喜欢一种灵敏度级别来进行典型的射击、步行游戏，以及更精确的DPI设置来进行远程狙击。
在专业方面，用户在穿越大的高分辨率屏幕(high-resolution screens)时可能需要非常灵敏的指针速度，而在尝试在Photoshop等应用程序中进行更精确的工作时，可能需要速度较慢、灵敏度较低的设置。
使用鼠标(Your Mouse)上的开关(Switches)更改DPI
一些鼠标，通常是那些用于游戏的鼠标，鼠标本身具有开关，可让您在使用鼠标时在不同的DPI级别之间动态切换。此DPI更改发生在鼠标本身的硬件级别。所以它不依赖于任何软件设置。
鼠标上的按钮可以即时调整DPI，而无需打开一堆菜单，这是一个很棒的游戏功能。这是因为游戏玩家可以在任何特定时刻快速切换灵敏度以最适合游戏中发生的情况。
在第三方鼠标软件(Third-Party Mouse Software)中更改DPI
符合现代外围标准（应该是全部）的电脑(Computer)鼠标不需要特殊的驱动程序或软件即可工作。如果将其连接到计算机，它将（至少）被检测为通用鼠标。
但是，带有额外按钮和其他非标准功能的鼠标将需要特定的驱动程序软件，有时还需要一个独特的实用程序来调整您的偏好。
如何在Windows 10中(Windows 10)调整鼠标灵敏度(Adjust Mouse Sensitivity)
如果您希望指针更轻松地移动得更远，以下是在Windows 10中调整指针速度的方法：
- 打开开始菜单并选择设置(Settings)齿轮。
- 选择设备(Devices)。
- 选择鼠标(Mouse)。
- 根据您的喜好调整光标速度。(Cursor speed)
更改将立即反映在您的鼠标指针中，以便您可以自己测试每个设置。
DPI 重要吗？
在某些圈子中，DPI是一个有争议的话题。有些人发誓极高DPI设置的好处，而另一些人则走向相反的极端。最后，重要的是找到最适合您的DPI设置。(DPI)当然，并不是每个人都有疯猫的反应能力，数量越多可能卖得越多，但并不总是越多越好！
What Is DPI on a Mouse and How To Change It?
DPI or Dots Per Inсh is a term mainly associated with printers. This is how many dots a printer can place within a square inch, and it determines the detail that the printer can produce. So how does that relate to optical mice? What is DPI on a mouse exactly?
DPI vs. CPI
DPI isn’t the correct term when we’re talking about optical mice. Instead, CPI or Counts Per Inch is what we’re really dealing with. However, the terms are used interchangeably, so it doesn’t matter which you see listed on a mouse. They don’t strictly mean the same thing, but for our purposes just pretend that they are. So, what do these measurements mean?
Essentially, the higher the DPI/CPI of the mouse, the smaller the movement you have to make for the mouse to pick up any changes. This makes the mouse more precise, but it also makes it more sensitive. The higher you set the DPI of your mouse, the further and faster the mouse will move on-screen for every inch it moves in real life.
We’ll be using the more common DPI term for the rest of this article, but whichever term you use, a higher number means a more accurate and sensitive mouse.
Polling Rate vs. DPI
DPI is mentioned alongside another specification known as the “polling rate,” measured in Hz. While DPI determines how finely-grained the mouse’s sensitivity to movement is, the polling rate measures how often the mouse checks its sensors for changes.
The higher the polling rate, the more instantaneous the mouse’s reaction to your inputs. In other words, mice with low polling rates may feel laggy. That isn’t great for anything beyond basic office productivity work.
Some gaming mice let you adjust the polling rate and offer settings such as 125Hz, 500Hz, and 1000Hz. Of course, the best polling rate depends on how you prefer using your mouse, so you should test the available options for yourself.
Polling rate isn’t an essential specification outside of gaming. Setting your polling rate too high can actually introduce lag in some systems with lower-end CPUs.
DPI vs. Sensitivity Settings
Most mice don’t let you change the DPI of the optical sensor, and yet you can still change the sensitivity of your mouse pointer in Windows. That suggests that DPI and sensitivity are not necessarily the same thing.
This sensitivity change is possible because the mouse driver can exaggerate how far the mouse pointer moves compared to its true DPI. This helps compensate for a mouse whose fixed DPI doesn’t offer the sensitivity you desire.
When Would You Adjust DPI?
Most users would be pleased with the standard DPI range of 400-1200. Even a 400 DPI mouse feels fine in applications such as Microsoft 365 and other productivity applications.
Despite this, there are mice on the market that offer sky-high DPI numbers. You’ll see numbers such as 4000, 8000, 12000, 20000 and even higher! Who are these mice for? The target market is competitive gaming.
The idea is that a high-DPI mouse allows for faster reaction and more precise aiming. In practice, true professional gamers tend to favor DPI settings somewhere between 400-800. However, some gamers prefer one sensitivity level for your typical shooty, on-the-foot gameplay and a more precise DPI setting for long-range sniping.
On the professional side of things, users may want a very sensitive pointer speed when traversing large, high-resolution screens and slow, less sensitive settings when trying to do more precise work in applications like Photoshop.
Changing DPI With Switches on Your Mouse
Some mice, usually those meant for gaming, have switches on the mouse itself that let you switch between different DPI levels on the fly while you’re actively using the mouse. This DPI change happens at the hardware level on the mouse itself. So it doesn’t depend on any software setting.
Having buttons on your mouse that can adjust DPI on the fly without having to open a bunch of menus is a great feature for gaming. This is because gamers can quickly switch sensitivity to best suit what’s happening in the game at any given moment.
Changing DPI in Third-Party Mouse Software
Computer mice that comply with modern peripheral standards (which should be all of them) don’t require a special driver or software to work. If you connect it to a computer, it will (at the very least) be detected as a generic mouse.
However, mice with extra buttons and other non-standard features will need specific driver software and sometimes a unique utility to tweak your preferences.
How to Adjust Mouse Sensitivity in Windows 10
If you want your pointer to move further with less effort, here’s how to adjust pointer speed in Windows 10:
- Open the Start menu and select the Settings Cog.
- Select Devices.
- Select Mouse.
- Adjust Cursor speed to your preference.
The changes will reflect in your mouse pointer immediately so that you can test each setting for yourself.
Does DPI Matter?
In certain circles, DPI is a controversial topic. Some people swear by the benefits of extremely high DPI settings, and others go to the opposite extreme. In the end, what matters is finding the DPI settings that are optimal for you. Of course, not everyone has the reflexes of a deranged cat, and higher numbers might sell more mice, but more isn’t always better!
