應用柱狀透鏡產生動態效果之二維條碼個人化郵票研究

Abstract

QR Code已成為目前最通用的二維條碼技術，多數應用的顏色僅侷限於單色，當與其它產品融入時顯得既突兀又不美觀，而二維條碼有其結構限制，難以改變樣貌，這也讓二維條碼尚有美化空間。為了提升美觀與互動效果，現有文獻中雖有彩色圖像QR Code技術，但仍無結合動態效果，因此本研究提出應用柱狀透鏡產生動態效果之二維條碼個人化郵票研究，為個人化郵票中的郵資符誌預留區域予以增加動態效果與連結功能。首先以100LPI柱狀透鏡搭配6pixels線網及0.254mm線距為設計基礎，製作3張不同角度的動畫影像在相互聯集為合成影像，其利用資訊隱藏技術結合誤差擴散法，使二維條碼(設定50至90不同資訊強度灰階值)藏入動畫影像，接續以600dpi輸出郵票，並確認手機讀取QR Code之功能及觀察柱狀透鏡覆蓋於郵票上的動態效果。 根據實驗結果，灰階值設定為70以下皆無法成功讀取及連結網址，同時測得70至90灰階值的最佳讀取距離為10.5cm，且不因動態設計而影響QR Code讀取效果，當資訊強度愈強所讀取秒數較低，反之則秒數增加。此外，設計影像經分割及藏入不同資訊強度QR Code，其藏入強度愈強則手機讀取效果愈好，且柱狀透鏡覆蓋於郵票上能呈現流暢的動態效果，讓使用者產生具有獨特趣味性的體驗。Currently, quick response (QR) codes are the most commonly-used two-dimensional barcode technology. Most applications are limited to a single color and can be obtrusive on products. They also have structural limitations that make it difficult to change their appearance, leaving much room for aesthetic improvement. To enhance aesthetic and interactive effects, existing studies have combined QR Code technology with color images; however, these works have been unable to achieve dynamic visual effects. Therefore, this study proposes a two-dimensional barcode design based on dynamic graphics, which we applied to personalized stamps to add animation and to connect URL. The design basis is a 100-LPI lenticular lens with a 6-pixel line pitch equivalent to 0.254 mm. We created three dynamic graphics from different angles and combined them to make a composite image. Using information-hiding by error diffusion, the QR Code in hidden within the dynamic graphics with QR Code on the varied information-strength grayscale values from 50 to 90. We then printed the stamps at 600-dpi quality, used a smartphone to scan the QR Code, and observed the resulting dynamic effects with a lenticular lens. The experiment results indicated that grayscale values under 70 cannot be successful scanned and the optimal scanning distance for grayscale values between 70 and 90 was 10.5 cm. The dynamic design did not affect the QR Code scanning. Greater information strength resulted in shorter scanning time, whereas weaker information strength required longer scanning time, and greater embedding strength resulted in better scanning effects. The lenticular lens over the stamps created dynamic effects, granting users a unique experience.