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計概實習 Week 8 Graphic & Image Tools
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Image 美是主觀的 最好的相片? Lena http://www.csie.nctu.edu.tw/~zlxuan/lena/lenna.html
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Image Tools Freeware Picasa http://picasa.google.com/intl/zh-TW/ Pixlr http://pixlr.com/ GIF Maker http://gifmake.com/ Commercial Software PhotoImpact X3 https://oper.cc.ntu.edu.tw/download/ Photoshop CSx http://www.adobe.com/tw/products/photoshop.html Photoshop Lightroom http://www.adobe.com/tw/products/photoshop-lightroom.html
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Storage Save in your own disk How much storage size do you have? How to manage your photo library? What if the disk crashed? Save in the cloud storage Security? Permission? Cost? Quality?
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Useful Cloud Storage Facebook Flickr http://www.flickr.com/ Picasa http://picasaweb.google.com/home Pinterest http://www.pinterest.com/
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Image Processing Concepts and Tools
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Digital Image Numeric representation (usually binary ) of 2D image Vector vs. Raster o Vector: using mathematical geometry to describe points; can be resized with no degradation in quality o Raster: consists of fixed number of picture elements = pixels
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Raster Aka. Bitmap o Rectangular grid of pixels Pixels store information o Typically RGB values
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BMP The classical image format No compression of pixel data Compare to RAW format They’re HUGE
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GIF Graphics Interchange Format 8-bit per pixel, 256 color palette A lossless format Can be used in small animations o Each frame is a GIF with its own palette
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PNG Portable Network Graphics o Successor to GIF Supports ‘ truecolor ’ (16 million) Can be both lossless and lossy o Lossy JPEG is better Streamable, works well with browsers
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JPG/JPEG Joint Photographic Experts Group 8-bit grayscale || 24-bit color (8-bit per R,G,B) Lossy compression o 高頻不敏感 o Fourier transform o Quantization Matrix
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Comparisons Size Usage Image complexity
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Let’s try some tools Let’s photoshop!?
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Website Project 一個主頁 http://homepage.ntu.edu.tw/~b017050xx/ 三個次頁面 別忘了有 ”MENU” 和 ” 回到主頁 ” 只能次頁面刷新,不能整個網站重新整理 其中之一需為 Your own profile: 想想 NTU-Portfolio 其餘兩頁自行發揮 興趣 / 專長 過去的活動記錄、作品集 各種課程心得 評分標準 內容(誠意至上) – 60% 運用的 html 語法 – 40% CSS – 10% Bonus!
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