图像处理中都变换都是正数,log中加1可以保证变换后是正数!
abs(f)的结果有可能是0,log0的结果就是无穷大了,所以加1就是避免了这种情况。
imshow(I,[low high])用指定的灰度范围 [low high]显示灰度图像 I。显示结果,图像中灰度值等于或低于low的都将用黑色显示,而灰度值大于等于high的都显示为白色,介于low和high之间的用其灰度级的默认值的中间色调显示。如果你用了一个空矩阵 ([]) 来代替 [low high], imshow 函数将使用 [min...
Abs( ValueTable )テーブル内の各数値の絶対値を返します。次の値を含むValue列を持つ単一列テーブル: 9, 4, 2 Exp( ValueTable )テーブル内の各数値でeを累乗した値を返します。次の値を含むValue列を持つ単一列テーブル: 8103.083927..., 0.018315..., 7.389056... ...
ABSBotRequests ACICollaborationAudit ACRConnectedClientList ACSAuthIncomingOperations ACSBillingUsage ACSCallAutomationIncomingOperations ACSCallAutomationMediaSummary ACSCallClientMediaStatsTimeSeries ACSCallClientOperations ACSCallClosedCaptionsSummary ACSCallDiagnostics ...
figure表示显示图像窗口,imshow表示显示图像,后面括号里的一大堆表示显示图像的各种参数:log(abs(F2)表示将F2进行绝对值处理再log处理,[-1,5]用指定的灰度范围 [low high]显示灰度图像,小于-1的像素则置为黑色、大于5则置为白色,'notruesize'是老版本中的参数,新版本中没有这一项参数了,用'...
v1.push_back( log10 ( vc6 ) ); cout << "The complex components log10 (vci), where abs (vci) = 1" << "\n& arg (vci) = i * pi / 6 of the vector v1 are:\n" ; for ( Iter1 = v1.begin( ) ; Iter1 != v1.end( ) ; Iter1++ ) cout << *Iter1 << endl; } ...
abs Nilton Pinheiro Anonymous July 26, 2011 Opa Nilton, tudo bem? Não é BUG é um comportamento esperado ao fazer um "detach", o SQL revoga todas as permissões e coloca acesso apenas para o usuário que fez o procedimento. Não vefiquei nenhum KB, mas vou procurar se encontrar ...
Day 30 - Did: Observar e Absorver OBI tests SNES: Zelda HIMYM Day 29 - Did: A Time to Kill Natal in chaos :x Day 28 - Read: hiring life lessons dreams / Did: OBI tests Day 27 - Read: life lessons e-reader machine learning music entrepreneur / Did: brother's birthday Day 26 ...
在公式中引用单元格 在公式中使用双引号的技巧 函数 函数概览 函数基础知识 按类别列出的函数列表 财务函数选择提示 用于对值四舍五入的函数 接受条件和通配符作为参数的函数 数字函数 ABS CEILING COMBIN EVEN EXP FACT FACTDOUBLE FLOOR GCD INT LCM LN ...