[[alternative]]Relationship Between Normalized Difference Vegetation Index and Water Content of Cultivated Medium

[[abstract]]　　本研究以影像識別為基礎，建立網室草莓的土壤凋萎點和葉綠素之間的相互關係，研究採用低價的樹梅派嵌入式系統，建立控制紅光與近紅光的鏡頭模組，土壤凋萎點測量為種植20組草莓及不種植任何草莓之20組介質為實驗分析依據，初期均浸水飽和，然後不澆水，每隔12小時秤重及拍攝一張照片用於計算常態化差異植生指標，直至草莓凋萎為止，然後建立土壤含水量與常態化差異植生指標之關係，分析發現在456小時，土壤含水量低於50%時常態化差異植生指標急遽下降，為求種植環境在良好狀態，建議未來溫室於土壤飽和後，草莓至少456小時後需要給水，避免植物因缺水導致生長不良枯萎。[[abstract]]　　Based on image recognition, this study establishes the relationship between the soil wilting point of strawberry and chlorophyll in greenhouse. Firstly, a low-cost single-board computer named Raspberry Pi is used to establish a lens module that supplied red and near-red light. Secondly, 20 groups strawberries and 20 groups of media that do not grow any plants were saturated with water. Weight and photo were recorded every 12 hours until the plants are wilted. Water content and the normalized difference vegetable index (NDVI) were calculated to build the relationship between soil moisture and normalized difference planting index. Outcomes show that soil water content is less than 50%, NDVI drops sharply after 456 hours. i.e. the saturated soil in greenhouse needs water supply after at least 456 hours to avoid the poor growth and wilting of strawberry due to lack of water