逻辑运算
非运算
公式
dst
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=
?
src
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\texttt{dst} (I) = \neg \texttt{src} (I)
dst(I)=?src(I)
API
CV_EXPORTS_W void bitwise_not(InputArray src, OutputArray dst,
InputArray mask = noArray());
- 参数一:src,输入图像矩阵;
- 参数二:dst,输出图像矩阵,大小和类型与输入相同;
- 参数三:mask,8位单通道掩码。
示例
Mat mask = Mat::zeros(512, 512, CV_8UC1);
Rect rect = Rect(100, 100, 200, 200);
mask(rect) = Scalar(1);
Mat bitwiseNot;
bitwise_not(left, bitwiseNot, mask);
imshow("bitwise_not", bitwiseNot);
运行效果
与运算
公式
dst
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=
src1
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∧
src2
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if
?
mask
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≠
0
\texttt{dst} (I) = \texttt{src1} (I) \wedge \texttt{src2} (I) \quad \texttt{if mask} (I) \ne0
dst(I)=src1(I)∧src2(I)if?mask(I)?=0
dst
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I
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=
src1
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I
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∧
src2
if
?
mask
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I
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≠
0
\texttt{dst} (I) = \texttt{src1} (I) \wedge \texttt{src2} \quad \texttt{if mask} (I) \ne0
dst(I)=src1(I)∧src2if?mask(I)?=0
dst
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I
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=
src1
∧
src2
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I
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if
?
mask
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I
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≠
0
\texttt{dst} (I) = \texttt{src1} \wedge \texttt{src2} (I) \quad \texttt{if mask} (I) \ne0
dst(I)=src1∧src2(I)if?mask(I)?=0
API
CV_EXPORTS_W void bitwise_and(InputArray src1, InputArray src2,
OutputArray dst, InputArray mask = noArray());
- 参数一:src1,第一个输入的图像矩阵或者 Scalar;
- 参数二:src2,第二个输入的图像矩阵或者 Scalar;
- 参数三:dst,输出图像矩阵,大小和类型与输入相同;
- 参数四:mask,8位单通道掩码。
示例
Mat bitwiseAnd;
Scalar scalar = Scalar(255,255);
bitwise_and(left, scalar, bitwiseAnd);
imshow("bitwise_and", bitwiseAnd);
运行效果
或运算
公式
dst
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I
)
=
src1
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I
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∨
src2
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I
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if
?
mask
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I
)
≠
0
\texttt{dst} (I) = \texttt{src1} (I) \vee \texttt{src2} (I) \quad \texttt{if mask} (I) \ne0
dst(I)=src1(I)∨src2(I)if?mask(I)?=0
dst
(
I
)
=
src1
(
I
)
∨
src2
if
?
mask
(
I
)
≠
0
\texttt{dst} (I) = \texttt{src1} (I) \vee \texttt{src2} \quad \texttt{if mask} (I) \ne0
dst(I)=src1(I)∨src2if?mask(I)?=0
dst
(
I
)
=
src1
∨
src2
(
I
)
if
?
mask
(
I
)
≠
0
\texttt{dst} (I) = \texttt{src1} \vee \texttt{src2} (I) \quad \texttt{if mask} (I) \ne0
dst(I)=src1∨src2(I)if?mask(I)?=0
API
CV_EXPORTS_W void bitwise_or(InputArray src1, InputArray src2,
OutputArray dst, InputArray mask = noArray());
- 参数一:src1,第一个输入的图像矩阵或者 Scalar;
- 参数二:src2,第二个输入的图像矩阵或者 Scalar
- 参数三:dst,输出图像矩阵,大小和类型与输入相同;
- 参数四:mask,8位单通道掩码。
示例
Mat bitwiseOr;
Scalar scalarOr = Scalar(255);
bitwise_or(left, scalarOr, bitwiseOr);
imshow("bitwise_or", bitwiseOr);
运行效果
异或运算
公式
dst
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I
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=
src1
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I
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⊕
src2
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I
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if
?
mask
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I
)
≠
0
\texttt{dst} (I) = \texttt{src1} (I) \oplus \texttt{src2} (I) \quad \texttt{if mask} (I) \ne0
dst(I)=src1(I)⊕src2(I)if?mask(I)?=0
dst
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I
)
=
src1
(
I
)
⊕
src2
if
?
mask
(
I
)
≠
0
\texttt{dst} (I) = \texttt{src1} (I) \oplus \texttt{src2} \quad \texttt{if mask} (I) \ne0
dst(I)=src1(I)⊕src2if?mask(I)?=0
dst
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I
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=
src1
⊕
src2
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I
)
if
?
mask
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I
)
≠
0
\texttt{dst} (I) = \texttt{src1} \oplus \texttt{src2} (I) \quad \texttt{if mask} (I) \ne0
dst(I)=src1⊕src2(I)if?mask(I)?=0
API
CV_EXPORTS_W void bitwise_xor(InputArray src1, InputArray src2,
OutputArray dst, InputArray mask = noArray());
- 参数一:src1,第一个输入的图像矩阵或者 Scalar;
- 参数二:src2,第二个输入的图像矩阵或者 Scalar
- 参数三:dst,输出图像矩阵,大小和类型与输入相同;
- 参数四:mask,8位单通道掩码。
示例
Mat bitwiseXor;
Scalar scalarXor = Scalar(255, 255);
bitwise_xor(left, scalarXor, bitwiseXor);
imshow("bitwise_xor", bitwiseXor);
运行效果
算术运算
图像矩阵的 add 、subtract 、multiply 、divide 四则运算是针对矩阵内对应元素的操作,并非矩阵的加减乘除。
公式
加法
dst
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I
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=
saturate
(
src1
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+
src2
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)
if
?
mask
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≠
0
\texttt{dst}(I) = \texttt{saturate} ( \texttt{src1}(I) + \texttt{src2}(I)) \quad \texttt{if mask}(I) \ne0 \\
dst(I)=saturate(src1(I)+src2(I))if?mask(I)?=0
dst
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=
saturate
(
src1
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)
+
src2
)
if
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mask
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≠
0
\texttt{dst}(I) = \texttt{saturate} ( \texttt{src1}(I) + \texttt{src2} ) \quad \texttt{if mask}(I) \ne0 \\
dst(I)=saturate(src1(I)+src2)if?mask(I)?=0
dst
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I
)
=
saturate
(
src1
+
src2
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I
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)
if
?
mask
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I
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≠
0
\texttt{dst}(I) = \texttt{saturate} ( \texttt{src1} + \texttt{src2}(I) ) \quad \texttt{if mask}(I) \ne0 \\
dst(I)=saturate(src1+src2(I))if?mask(I)?=0
减法
dst
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I
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=
saturate
(
src1
(
I
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?
src2
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I
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)
if
?
mask
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I
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≠
0
\texttt{dst}(I) = \texttt{saturate} ( \texttt{src1}(I) - \texttt{src2}(I)) \quad \texttt{if mask}(I) \ne0 \\
dst(I)=saturate(src1(I)?src2(I))if?mask(I)?=0
dst
(
I
)
=
saturate
(
src1
(
I
)
?
src2
)
if
?
mask
(
I
)
≠
0
\texttt{dst}(I) = \texttt{saturate} ( \texttt{src1}(I) - \texttt{src2} ) \quad \texttt{if mask}(I) \ne0 \\
dst(I)=saturate(src1(I)?src2)if?mask(I)?=0
dst
(
I
)
=
saturate
(
src1
?
src2
(
I
)
)
if
?
mask
(
I
)
≠
0
\texttt{dst}(I) = \texttt{saturate} ( \texttt{src1} - \texttt{src2}(I) ) \quad \texttt{if mask}(I) \ne0 \\
dst(I)=saturate(src1?src2(I))if?mask(I)?=0
dst
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I
)
=
saturate
(
src2
?
src1
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I
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)
if
?
mask
(
I
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≠
0
\texttt{dst}(I) = \texttt{saturate} ( \texttt{src2} - \texttt{src1}(I) ) \quad \texttt{if mask}(I) \ne0
dst(I)=saturate(src2?src1(I))if?mask(I)?=0
乘法
dst
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I
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=
saturate
(
scale
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src1
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I
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?
src2
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)
\texttt{dst} (I)= \texttt{saturate} ( \texttt{scale} \cdot \texttt{src1} (I) \cdot \texttt{src2} (I))
dst(I)=saturate(scale?src1(I)?src2(I))
除法
dst(I)
?
=
?
saturate(src1(I)*scale/src2(I))
\texttt{dst(I) = saturate(src1(I)*scale/src2(I))} \\
dst(I)?=?saturate(src1(I)*scale/src2(I))
dst(I)
?
=
?
saturate(scale/src2(I))
\texttt{dst(I) = saturate(scale/src2(I))}
dst(I)?=?saturate(scale/src2(I))
API
CV_EXPORTS_W void add(InputArray src1, InputArray src2, OutputArray dst, InputArray mask = noArray(), int dtype = -1);
CV_EXPORTS_W void subtract(InputArray src1, InputArray src2, OutputArray dst, InputArray mask = noArray(), int dtype = -1);
CV_EXPORTS_W void multiply(InputArray src1, InputArray src2, OutputArray dst, double scale = 1, int dtype = -1);
CV_EXPORTS_W void divide(InputArray src1, InputArray src2, OutputArray dst, double scale = 1, int dtype = -1);
- 参数一:src1,第一个输入的图像矩阵或者 Scalar;
- 参数二:src2,第二个输入的图像矩阵或者 Scalar
- 参数三:dst,输出图像矩阵,大小和类型与输入相同;
- 参数四:mask,8位单通道掩码;
- 参数五:scale,缩放倍数;
- 参数六:dtype,输出矩阵的图像深度。
示例
int8_t b[6] = {8, 9, 10, 11, 12, 13};int8_t c[6] = {6, 7, 5, 4, 3, 9};Mat first = Mat(3, 2, CV_8UC1, b);Mat second = Mat(3, 2, CV_8UC1, c);Mat third = Mat(2, 3, CV_8UC1, c);// 算数运算Mat addResult;add(first, second, addResult);cout << "add" << endl << format(addResult, Formatter::FMT_C) << endl << endl;Mat subtractResult;subtract(first, second, subtractResult);cout << "subtract" << endl << format(subtractResult, Formatter::FMT_C) << endl << endl;Mat multiplyResult;multiply(first, first, multiplyResult);cout << "multiply" << endl << format(multiplyResult, Formatter::FMT_C) << endl << endl;Mat divideResult;divide(first, second, divideResult);cout << "divide" << endl << format(divideResult, Formatter::FMT_C) << endl << endl;
运行效果
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