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ˮӡУˮӡ³ԹһԻìܣˮӡ㷨ӦüشݣֿԿŵźűΣȻʵУָͬʱʵ֡ҪǶϢԽ࣬ˮӡ³ԾԽ

    ˮӡǶ̰εĸıϢʹ֮ͬʱЯˮӡϢǶϢͨij㷨ڽܵĻϢлǶУ̳Ϊ“ˮӡ ȡ”ˮӡҪƺǶˮӡ֡ڷֹǷ͵ӦãˮӡҪھ̶ȵʧȻָܹڴ۸ ӦãˮӡһҪܹЧϢʧ

    ˮӡĹһˮӡ³Ҫˮӡ³ָˮӡźھֱ׼ݴĹܱ֮Իܱ׼ȷ ı׼ݴָݾݷ༭ӡǿʽתȵĹ̡ĹָЩԡٻԵģͼȥ ˮӡźŵĴ̡³ˮӡӦֿܹˮӡΪչˮӡƷеҵֵԽΪɹĹͻٻԵĹһֳɹ ĹΪߴҵֵܹˮӡ޷ָȡĵزͬʱֻһЩı䶯Ӱݵҵֵʵ ӦҪǽжԿĹٻԹ޷ΪߴõҵֵƻãӰˮӡʵӦá

    Ǹ任㷨[2][3]ʵֹ̡任㷨ʵֹΪȼͼɢұ任DCTȻˮӡӵDCTзֵǰkϵ ϣֱͨΪͼĵƵDCTϵǰkʾΪ{}idD=1kiL=ˮӡǷӸ˹ֲʵ {},iwW=õˮӡͼI뺯ֱԭʼͼIˮӡͼI*ɢұ任ȡǶˮӡW*ؼȷˮӡĴ ÷ʹˮӡ󾭹һЩͨõļακźŴȽԵıκȻܹȡһˮӡһ򵥸ĽDzˮӡǶ뵽 DCTĵƵϣǶ뵽ƵԵˮӡ³벻ɼ֮ìܡ⣬ԽͼĿռͨɢҶ任DCT ɢС任DWTתΪӦƵϵΣݴصϢͣʵΣٴΣȷijֹ㷨󣬽ͼƵ ϵӦķ任תΪռݡ㷨غȡϢӣϢܴܺ󣬵ǿʺƷȨˮӡ С


ʱ䣺2014-06-23 23:41:18    195


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