 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 3 | 1/1 | 返回列表 |
| 查看: 630 | 回復(fù): 2 | ||
s084730木蟲 (正式寫手)
|
[求助]
【求助】matlab中的幾個公式含義
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% To fit a 2-D gaussian %% m = Image %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% [cx,cy,sx,sy,PeakOD] = Gaussian2D(m,tol); [sizey sizex] = size(m); [x,y] = MeshGrid(1:sizex,1:sizey); fit = abs(PeakOD)*(exp(-0.5*(x-cx).^2./(sx^2)-0.5*(y-cy).^2./(sy^2))); %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% a function to fit a thermal cloud 2-D function [cx,cy,sx,sy,PeakOD] = Gaussian2D(m,tol); %% m = image %% tol = fitting tolerance options = optimset('Display','off','TolFun',tol,'LargeScale','off'); [sizey sizex] = size(m); [cx,cy,sx,sy] = centerofmass(m); pOD = max(max(m)); mx = m(round(cy),  ;x1D = 1:sizex; ip1D = [cx,sx,pOD]; fp1D = fminunc(@fitGaussian1D,ip1D,options,mx,x1D); cx = fp1D(1); sx = fp1D(2); PeakOD = fp1D(3); my = m(:,round(cx))'; y1D = 1:sizey; ip1D = [cy,sy,pOD]; fp1D = fminunc(@fitGaussian1D,ip1D,options,my,y1D); cy = fp1D(1); sy = fp1D(2); PeakOD = fp1D(3); [X,Y] = meshgrid(1:sizex,1:sizey); initpar = [cx,cy,sx,sy,PeakOD]; fp = fminunc(@fitGaussian2D,initpar,options,m,X,Y); cx = fp(1); cy = fp(2); sx = fp(3); sy = fp(4); PeakOD = fp(5); %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % PURPOSE: find c of m of distribution function [cx,cy,sx,sy] = centerofmass(m); [sizey sizex] = size(m); vx = sum(m); vy = sum(m'); vx = vx.*(vx>0); vy = vy.*(vy>0); x = [1:sizex]; y = [1:sizey]; cx = sum(vx.*x)/sum(vx); cy = sum(vy.*y)/sum(vy); sx = sqrt(sum(vx.*(abs(x-cx).^2))/sum(vx)); sy = sqrt(sum(vy.*(abs(y-cy).^2))/sum(vy)); 其中cx = sum(vx.*x)/sum(vx); cy = sum(vy.*y)/sum(vy); sx = sqrt(sum(vx.*(abs(x-cx).^2))/sum(vx)); sy = sqrt(sum(vy.*(abs(y-cy).^2))/sum(vy));是什么含義 |
回復(fù)此樓» 猜你喜歡
求調(diào)劑
已經(jīng)有5人回復(fù)
-
材料工程專碩 348分求調(diào)劑
已經(jīng)有5人回復(fù)
-
一志愿南大，0703化學(xué)，分?jǐn)?shù)336，求調(diào)劑
已經(jīng)有3人回復(fù)
-
322求調(diào)劑
已經(jīng)有3人回復(fù)
-
0703化學(xué)調(diào)劑
已經(jīng)有4人回復(fù)
-
化學(xué)調(diào)劑
已經(jīng)有4人回復(fù)
-
297求調(diào)劑
已經(jīng)有3人回復(fù)
-
生物學(xué)調(diào)劑
已經(jīng)有3人回復(fù)
-
工科0856求調(diào)劑
已經(jīng)有3人回復(fù)
-
求調(diào)劑
已經(jīng)有3人回復(fù)
» 本主題相關(guān)價值貼推薦，對您同樣有幫助:
- 技術(shù)路線里面的公式太復(fù)雜，符號太多，需要每個都解釋什么含義么？
已經(jīng)有8人回復(fù)
- MATLAB中有意思的why函數(shù)
已經(jīng)有5人回復(fù)
- 請教公式中大括號的含義
已經(jīng)有6人回復(fù)
- 理解數(shù)字信號處理的三把鑰匙
已經(jīng)有37人回復(fù)
- 【求助】MATLAB中Normalization的數(shù)據(jù)預(yù)處理方法具體是指什么意思啊
已經(jīng)有12人回復(fù)
mvpyqz
至尊木蟲 (知名作家)
- 博學(xué)EPI: 18
- 應(yīng)助: 236 (大學(xué)生)
- 金幣: 11502
- 紅花: 10
- 帖子: 6086
- 在線: 394.1小時
- 蟲號: 1105587
- 注冊: 2010-09-22
- 專業(yè): 信號理論與信號處理
2樓2013-04-27 23:32:24
s084730
木蟲 (正式寫手)
- 應(yīng)助: 0 (幼兒園)
- 金幣: 4431.5
- 散金: 644
- 紅花: 1
- 帖子: 534
- 在線: 130.1小時
- 蟲號: 774019
- 注冊: 2009-05-19
- 性別: GG
- 專業(yè): 光學(xué)信息獲取與處理
3樓2013-04-30 11:19:28
相關(guān)版塊跳轉(zhuǎn)
我要訂閱樓主 s084730 的主題更新
| 3 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 材料 271求調(diào)劑 +5 | 展信悅_ 2026-03-21 | 5/250 |
|
|---|---|---|---|---|
|
|
[考研] 化學(xué)工程321分求調(diào)劑 +16 | 大米飯！ 2026-03-15 | 20/1000 |
|
|
|
[考研] 296求調(diào)劑 +4 | www_q 2026-03-20 | 4/200 |
|
|
|
[考研] 268求調(diào)劑 +9 | 簡單點0 2026-03-17 | 9/450 |
|
|
|
[考研] 22 350 本科985求調(diào)劑，求老登收留 +3 | 李軼男003 2026-03-20 | 3/150 |
|
|
|
[考研] 306求調(diào)劑 +4 | chuanzhu川燭 2026-03-18 | 4/200 |
|
|
|
[考研] 南昌大學(xué)材料專碩311分求調(diào)劑 +6 | 77chaselx 2026-03-20 | 6/300 |
|
|
[考研] 08工科 320總分 求調(diào)劑 +6 | 梨花珞晚風(fēng) 2026-03-17 | 6/300 |
|
|
|
[考研] 332求調(diào)劑 +4 | ydfyh 2026-03-17 | 4/200 |
|
|
|
[考研] 一志愿西南交大，求調(diào)劑 +5 | 材化逐夢人 2026-03-18 | 5/250 |
|
|
|
[考研] 330求調(diào)劑 +4 | 小材化本科 2026-03-18 | 4/200 |
|
|
|
[考研] 085600材料與化工 +8 | 安全上岸！ 2026-03-16 | 8/400 |
|
|
|
[考研] 中南大學(xué)化學(xué)學(xué)碩337求調(diào)劑 +3 | niko- 2026-03-19 | 6/300 |
|
|
|
[考研] 一志愿西南交通 專碩 材料355 本科雙非 求調(diào)劑 +5 | 西南交通專材355 2026-03-19 | 5/250 |
|
|
|
[考研]
 295復(fù)試調(diào)劑
+8
|
簡木ChuFront 2026-03-19 | 8/400 |
|
|
|
[考研] 一志愿北京化工大學(xué)0703化學(xué)318分，有科研經(jīng)歷，求調(diào)劑 +4 | 一瓶苯甲酸 2026-03-14 | 4/200 |
|
|
|
[考研] 招收調(diào)劑碩士 +4 | lidianxing 2026-03-19 | 12/600 |
|
|
|
[考研] 0703化學(xué)調(diào)劑 +10 | 妮妮ninicgb 2026-03-15 | 14/700 |
|
|
|
[考研] 生物學(xué)071000 329分求調(diào)劑 +3 | 我愛生物生物愛?/a> 2026-03-17 | 3/150 |
|
|
|
[考研] 333求調(diào)劑 +3 | 文思客 2026-03-16 | 7/350 |
|