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📁 数字图象处理入门,非常好的书！！！！推荐！
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<h1 style='text-align:justify;text-justify:inter-ideograph'><span lang=ZH-CN
style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>第</span><span
style='font-family:"Times New Roman"'>1</span><span lang=ZH-CN
style='font-family:黑体;mso-hansi-font-family:"Times New Roman"'>章</span><span
style='font-family:"Times New Roman"'> Windows</span><span lang=ZH-CN
style='font-family:黑体;mso-hansi-font-family:"Times New Roman"'>位图和调色板</span><span
style='font-family:"Times New Roman"'><o:p></o:p></span></h1>

<h2 style='text-align:justify;text-justify:inter-ideograph'><span
style='font-family:"Times New Roman"'>1.1 </span><span lang=ZH-CN
style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>位图和调色板的概念</span><span
style='font-family:"Times New Roman"'><o:p></o:p></span></h2>

<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span lang=ZH-CN style='font-size:10.5pt'>如今</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>Windows(3.x</span><span
lang=ZH-CN style='font-size:10.5pt'>以及</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>95</span><span lang=ZH-CN style='font-size:10.5pt'>，</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>98</span><span
lang=ZH-CN style='font-size:10.5pt'>，</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>NT)</span><span lang=ZH-CN style='font-size:
10.5pt'>系列已经成为绝大多数用户使用的操作系统，它比</span><span style='font-size:10.5pt;font-family:
"Times New Roman"'>DOS</span><span lang=ZH-CN style='font-size:10.5pt'>成功的一个重要因素是它可视化的漂亮界面。那么</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>Windows</span><span
lang=ZH-CN style='font-size:10.5pt'>是如何显示图象的呢？这就要谈到位图</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>(bitmap)</span><span
lang=ZH-CN style='font-size:10.5pt'>。</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'><o:p></o:p></span></p>

<p style='margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:
inter-ideograph;line-height:18.0pt'><span lang=ZH-CN style='font-size:10.5pt'>我们知道，普通的显示器屏幕是由许许多多点构成的，我们称之为象素。显示时采用扫描的方法：电子枪每次从左到右扫描一行，为每个象素着色，然后从上到下这样扫描若干行，就扫过了一屏。为了防止闪烁，每秒要重复上述过程几十次。例如我们常说的屏幕分辨率为</span><span
style='font-size:10.5pt;font-family:"Times New Roman"'>640×480</span><span
lang=ZH-CN style='font-size:10.5pt'>，刷新频率为</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>70Hz</span><span lang=ZH-CN style='font-size:
10.5pt'>，意思是说每行要扫描</span><span style='font-size:10.5pt;font-family:"Times New Roman"'>640</span><span
lang=ZH-CN style='font-size:10.5pt'>个象素，一共有</span><span style='font-size:10.5pt;
font-family:"Times New Roman"'>480</span><span lang=ZH-CN style='font-size:
10.5pt'>行，每秒重复扫描屏幕</span><span style='font-size:10.5pt;font-family:"Times New Roman"'>70</span><span
lang=ZH-CN style='font-size:10.5pt'>次。</span><span style='font-size:10.5pt;
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