我有一個(gè)與仿射變換（<affine>標(biāo)簽之間）相關(guān)的問題。我正在使用AffineTransform3D函數(shù)從使用 Java 創(chuàng)建的 BigDataViewer Fiji 插件創(chuàng)建的 xml 文件（此處為完整 xml 文件）中提取以下兩個(gè)仿射轉(zhuǎn)換：<ViewRegistrations><ViewRegistration timepoint="0" setup="0"> <ViewTransform type="affine"> <Name>Fast 3d geometric hashing (rotation invariant), AffineModel3D on [beads (c=0)]</Name> <affine>1.0 0.0 0.0 0.0 0.0 1.0 0.0 0.0 0.0 0.0 1.0 0.0</affine> </ViewTransform> <ViewTransform type="affine"> <Name>calibration</Name> <affine>1.9998662296836334 0.0 0.0 0.0 0.0 1.9998662296836334 0.0 0.0 0.0 0.0 1.9998662296836334 0.0</affine> </ViewTransform></ViewRegistration>我想在 R 中導(dǎo)入兩個(gè)仿射變換，使用buildAffine()R 包 {RNiftyReg} 中的函數(shù)，然后使用composeTransforms(){RNiftyReg}計(jì)算它們的組成。buildAffine(translation = c(0, 0, 0), scales = c(1, 1, 1), skews = c(0, 0,0), angles = c(0, 0, 0), source = NULL, target = NULL, anchor = c("none", "origin", "centre", "center"))我的問題：上面的仿射變換存儲(chǔ)在一個(gè)包含 12 個(gè)索引的向量中。buildAffine()需要將平移、比例、傾斜和角度的值作為輸入?yún)?shù)。我想知道哪個(gè)值對應(yīng)什么。
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Smart貓小萌
TA貢獻(xiàn)1911條經(jīng)驗(yàn) 獲得超7個(gè)贊
我主要是 R 用戶，但這里是： hte Java 調(diào)用中的變量名稱是：
dat <- scan (text="double xx, double yx, double zx, double tx, double xy, double yy, double zy, double ty, double xz, double yz, double zz, double tz", what="")
dat <- dat[dat != "double"]
matrix(dat,4)
[,1] [,2] [,3]
[1,] "xx," "xy," "xz,"
[2,] "yx," "yy," "yz,"
[3,] "zx," "zy," "zz,"
[4,] "tx," "ty," "tz"
此頁面記錄了如何對仿射變換進(jìn)行編碼，唯一的區(qū)別是轉(zhuǎn)置了 4x3 矩陣：https : //o7planning.org/en/11157/javafx-transformations-tutorial
t( matrix(dat,4) )
[,1] [,2] [,3] [,4]
[1,] "xx," "yx," "zx," "tx,"
[2,] "xy," "yy," "zy," "ty,"
[3,] "xz," "yz," "zz," "tz"
所以矩陣將應(yīng)用于 c(x,y,z,1) 的向量以獲得輸出：
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