<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "> <br><div><div>On Oct 10, 2010, at 9:28 AM, 김태윤 wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>extract polygon information from an image is it silly thinking?</div><div>hello</div><div>I was told that when it comes to compare with polygon and image rotating, polygon is much faster.</div><div>and an obviously simple idea come across my mind.</div> <div>then why don't I change image into much simpler colored polygon?</div><div>feel like it is ok because I don't care about loosing detail of image.</div><div>it's ok if I can just figure out how it looks like.</div></blockquote><div><br></div>As it happens, this is very much the idea behind the JPEG image format.  There's been a lot of research over the years on different ways to do this; look up "lossy image compression".</div><div><br></div><br><div> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div>Stephen Bloch</div><div><a href="mailto:sbloch@adelphi.edu">sbloch@adelphi.edu</a></div><div><br class="webkit-block-placeholder"></div></span><br class="Apple-interchange-newline"> </div><br></body></html>