P - phototropism 中文 - EN166

phototropism n.1.【植物；植物學】向光性。2.【物理學】光色互變(...

phototropy
The author mainly anticipates the task including the simulation of eye fundus imaging and image mosaic . on the base of the dr principle and ophthalmic phototropism study , the author analyze and contrast new fundus camera system with traditional fundus camera . the author will establish the eyeball model with 3ds max technology , imitate the simple eyeball dioptre system and simulate the narrow - angle imaging to ensure the rationality and authenticity of fundus image , which solves the object origin of later image process , then fast mosaics the nine piece of fundus images with the help of the image registration theory and acquire a piece of wide - view fundus image containing more information , thereby provides doctor with enough diagnostic detail , which solves the problem of narrow view 作者在熟悉糖尿病性視網膜病變原理和眼科屈光學的基礎上,進一步研究分析了新型免散瞳眼底照相系統和傳統眼底照相機原理和區別,擬采用3dsmax建立三維眼球模型,仿真眼球屈光系統,模擬眼底照相系統的小角度拍攝,使獲取的眼底圖像合理真實,解決后期系統圖像分析處理的對象來源問題;然后運用醫學圖像配準理論對仿真獲取到的九幅小角度眼底圖像進行快速拼接,拼成一幅大角度的眼底圖像,解決小瞳孔拍攝圖像視角太小的問題;最后通過對眼底圖像配準算法在相似性測度和搜索算法的比較,找到一種適合眼底照相系統的眼底圖像拼接的快速算法。
On the other hand , the drawing part of the program applies the technology of illumination and texture mapping , taking into account some nature phenomena such as random natural factor and phototropism . the plant , generated by the program , thus is three - dimensional , vivid , and accord with natural law 另一方面，運用光照、紋理映射等技術，結合植物生長過程中的隨機因素和趨光性等自然現象，實現了植物生長過程的計算機模擬，生成的植物具有三維立體效果，形態逼真，符合自然生長規律。
First , we studied the role of exogenous ca2 + ion in the hypocotyl phototropism . the curvature of hypocotyls was strongly depended on extracelluar ca2 + concentration . in the medium with low ca2 + ( < 200 nm ) , hypocotyl curvature was significantly inhibited 胞外鈣離子對下胚軸向光彎曲影響的實驗結果表明，不同的胞外鈣離子濃度引起下胚軸向光彎曲角度發生變化。
Heliotropism a form of phototropism in which flowers move to point toward the sun , tracking it as it moves across the sky 向日性：趨光性的一種類型，植物的花在一天內朝向太陽，并隨著日光照射的方向而轉移方位。
An auxin increases the growth in length of a plant cell, thus causing the curving of a stem, or roof, in phototropism and geotropism . 植物生長素能加快植物細胞長勢，因此使莖彎曲向著陽光，或使根深扎入土。