高容量彩色圖像化QR Code應用於NFT之研究

隨著科技的進步，二維條碼的應用範圍已顯著擴展。最初用於追蹤車輛零件，如今廣泛應用於傳遞數位訊息，甚至成為連結虛擬與現實領域的橋樑。Quick Response Code擁有快速解碼、面積小、儲存資訊量大，以及容錯機制等多項特點，已成為最常用之二維條碼規格。非同質化代幣（NFTs, Non-fungible Tokens）的興起，NFT結合藝術創作而生成加密藝術，加密藝術品擁有相當高的經濟價值。這些高經濟價值的虛擬藝術品需存放在虛擬貨幣錢包中，因此登入虛擬貨幣錢包密鑰（註記詞、私鑰）之保存方式顯得格外重要。本研究將使用傳統QR Code與圖像結合，再加入色彩模式以Red、Green、Blue分層方式將虛擬貨幣錢包密鑰放入各別色版，以增加資訊儲存容量，製作出更美觀、儲存資訊量更大並且具有防偽功能的高容量彩色圖像化QR Code。為了進一步測驗解碼效果，本研究將高容量彩色圖像化QR Code彩色輸出成不同尺寸為2.1公分、3.1公分及4.2公分，分別掃描並進行資料判讀及辨識錯誤率分析。研究結果顯示出輸出尺寸小、彩色印刷輸出後會有網點擴張之情況，皆會提升錯誤率，故另透過均值模糊搭配歐式距離公式進行色彩校正機制，以降低錯誤率。本研究結果也成功將高容量彩色圖像化QR Code與NFT達到虛實整合的加值應用，透過掃描外顯QR Code，使用者可以進入展示NFT的OpenSea網站，透過程式解碼內藏QR Code可獲得虛擬貨幣錢包之密鑰。

關鍵字

非同質化代幣；高容量彩色圖像化QR Code ；色彩校正

並列摘要

With the advancement of technology, the application scope of two-dimensional barcodes had significantly expanded. Originally used for tracking vehicle parts, they are now widely used to transmit digital infor-mation. Also, they had even acted as a bridge between the virtual and phys-ical realms. With the advantages of Quick Response Code, such as getting the information quickly, tiny size, large amount of information storage and error correction capability, it became the most common use in two-dimensional barcode formats. The rise of Non-Fungible Tokens (NFTs) combined art creation to generate encrypted artworks, and these encrypted art pieces held significant economic value. These high-value virtual artworks needed to be stored in a cryptocurrency wallet, so the preservation of cryp-tocurrency wallet was particularly important. This research combined QR Codes with images and RGB color spaces. The function was to hide the passwords of cryptocurrency wallet in Red, Green and Blue channels in order to create an aesthetically pleasing, high capacity, anti-counterfeiting high-capacity color graphic QR Code. To test the effect of decoding, this research output the high-capacity color graphic QR Code into different sizes which were 2.1 cm, 3.1 cm and 4.2 cm, then scanned separately and analyzed the error rates. The results showed that small output sizes and dot gain after color printing would increase the error rate. Therefore, color correction was accomplished by mean filter in con-junction with Euclidean Distance to mitigate error rates. This research also successfully achieved the value-added integration of high-capacity color graphic QR Code with NFTs (Non-Fungible Tokens). By scanning the visible QR Code, users could access the OpenSea website to showcase NFTs to others. Through programmatic decoding of the embedded QR Code, users could obtain the passwords to the cryptocurrency wallet.