像素和分辨率

<span style="FONT-FAMILY: 宋体; COLOR: fuchsia; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: Arial">我们以一款手机为例来说明这个问题。其主屏尺寸：<span lang="EN-US" xml:lang="EN-US">4</span>寸，主屏分辨率：<span lang="EN-US" xml:lang="EN-US">800x480</span>像素，通过勾股定理计算可知其长宽为<span lang="EN-US" xml:lang="EN-US">3.430</span>寸<span lang="EN-US" xml:lang="EN-US">X2.058</span>寸（<span lang="EN-US" xml:lang="EN-US">87.1</span>毫米<span lang="EN-US" xml:lang="EN-US">X52.3</span>毫米）。<span lang="EN-US" xml:lang="EN-US">800/3.430=233</span>，即每英寸长度有<span lang="EN-US" xml:lang="EN-US">233</span>个像素，每一个像素有<span lang="EN-US" xml:lang="EN-US">87.1/800=0.109</span>毫米大。</span>

像素和分辨率

原文：http://www.cnblogs.com/aoun/p/4135133.html