A visualization of YCbCr color space The CbCr plane at constant luma Y′=0.5 A color image and its Y′, CB and CR components. The Y′ image is essentially a greyscale copy of the main image. YCbCr, Y′CbCr, or Y Pb/Cb Pr/Cr, also written as YCBCR or Y′CBCR, is a family of color spaces used as a part of the color image pipeline in video and digital photography systems. Y′ is the luma component and CB a
Blog Search when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: ${entry.path} [in template "__entry.ftlh" at line 3, column 25] - Reached through: #include "__entry.ftlh" [in template "entry.ftlh" at
The longest election season in memory is now over, and we wanted to help you unwind and express yourself as we head into the new era. Make your own "Obamicon" — your image in a style inspired by Shepard Fairey's iconic poster. Regardless of your candidate of choice in the 2008 election, here's your chance to sound-off. Take your picture with a webcam or upload a photo, choose your own message, and
原理 画像の拡大縮小アルゴリズムはいくつか存在します ・ニアレストネイバー ・バイリニア ・バイキュービック ・Lanczos-2 ・Lanczos-3 この中で理論上最も美しいとされているのはLanczos-3であり、漢はだまってこの方法を選ぶべきなのですが、いくつかの実装では正確な計算がされておらず、もったいない事になっています。 なので今回はできるだけ正確な高品質な画像を目指して実装してみました。 rubyで。 原理的なものはコチラが詳しいです。こんなブログを見るよりお勧め http://gwaihir.hp.infoseek.co.jp/wiki.shtml?Lanczos%E9%96%A2%E6%95%B0%E3%81%AB%E3%82%88%E3%82%8B%E7%94%BB%E5%83%8F%E3%81%AE%E6%8B%A1%E5%A4%A7%E7%B8%AE%E5%B0%
For one of my iPhone project, I had to view large images of about 2500×2500 pixels, which is tricky because UIImage and UIView doesn’t support size above 1024×1024. My approach was to create a smaller, lower resolution image of 512×512 for panning and zooming, and add a high resolution image of the size of the device screen. Let’s dig into the code! You don’t have to bother copying the code from t
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