พูดคุย:การแปลงโคไซน์ไม่ต่อเนื่อง - วิกิพีเดีย

# พูดคุย:การแปลงโคไซน์ไม่ต่อเนื่อง

### จากวิกิพีเดีย สารานุกรมเสรี

_/|\_ คนทำรูปแกร่งจัดครับ! ---Jittat 08:31, 6 เม.ย. 2005 (UTC)

  powerpoint :P ไร้สติ 16:50, 6 เม.ย. 2005 (UTC)
    เห็นแล้วกดเข้ามาด้วยเหตุผลด้วยกัน ... สุดยอด -- bact' 19:58, 6 เม.ย. 2005 (UTC)

## [แก้] Error in image labels

I apologize for posting in English, but that is the only language I am fluent in. I wanted to point out an error in the image labeling in your article.

I have worked on the discrete cosine transform article in the English Wikipedia, and I noticed this article because I wanted to compare to what the other languages were doing.

First off, it looks like you did a great job! You're the only language that went ahead and gave the formulas for types V-VIII! I also love the final table of images showing the symmetries; I independently came up with something very similar in the English Wikipedia.

However, your images are mislabelled. ภาพ:Dct2e.png is actually the DCT-III, and ภาพ:Dct3e.png is actually the DCT-II. (The fact that the DCT-II is even around both boundaries is critical to its energy compaction properties.)

Note also that the right columns in the table of images are DCTs of types V-VIII. They are not DCT I-IV of odd size.

—Steven G. Johnson

  Thanks for your quick response! The figures look great now. I would suggest uploading them (with correct names) to the Wikimedia commons so that the other Wikipedias can use them. Ideally, upload them in SVG format instead of as PNG, since they are vector graphics. —Steven G. Johnson 15:10, 15 September 2006 (UTC)

ดึงข้อมูลจาก "http://th.wikipedia.org../../../%E0%B8%81/%E0%B8%B2/%E0%B8%A3/%E0%B8%9E%E0%B8%B9%E0%B8%94%E0%B8%84%E0%B8%B8%E0%B8%A2%7E%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B9%81%E0%B8%9B%E0%B8%A5%E0%B8%87%E0%B9%82%E0%B8%84%E0%B9%84%E0%B8%8B%E0%B8%99%E0%B9%8C%E0%B9%84%E0%B8%A1%E0%B9%88%E0%B8%95%E0%B9%88%E0%B8%AD%E0%B9%80%E0%B8%99%E0%B8%B7%E0%B9%88%E0%B8%AD%E0%B8%87.html".

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