CSS Filter not working on body in Chrome & Firefox - Stack Overflow
What Can CSS Filters Do for You? - Designmodo
CSSのfilterプロパティを利用して簡単なフィルターを画像に追加しよう : ビジネスとIT活用に役立つ情報（株式会社アーティス）
Advanced CSS filters - Vincent De Oliveira
CSS Filter | How CSS Filter Works with Code and Output?
New feature: CSS filters
CSS3 のfilter で加工ソフトなしで画像に効果を加えてみる - はしくれエンジニアもどきのメモ
Cross Browser Grayscale Images with CSS Filter - Xpert Developer
css3 filters (Example)
CSS Filter - Grayscale
filter | Codrops
html - Replicate the partial CSS Grayscale filter in JavaScript? - Stack Overflow
I want to add img filter to specific page - Customize with code - Squarespace Forum
grayscale() - CSS: Cascading Style Sheets | MDN
Convert an image into grayscale image using HTML/CSS - GeeksforGeeks
How to Convert Color image to Black & White using CSS Filter ( Color to Grayscale)
Convert an Image into Grayscale Image using HTML/CSS - javatpoint
CSS Filter Effects landing in WebKit - Chrome Developers
How To Create a Black and White Image
the new code – Convert Images To Black And White With CSS
GitHub - mrmrs/css-filter-grayscale: CSS module for te grayscale function
CSS Filters: An Online Photo Editing Playground - Orangeable
