Softfloat support
核心功能 » 实用程序、系统函数及宏

struct cv::softdouble
struct cv::softfloat

函数

cv::softdouble::softdouble ()
Default constructor. 更多...
cv::softdouble::softdouble (const softdouble &c)
Copy constructor. 更多...
cv::softdouble::softdouble (const uint32_t )
Construct from integer. 更多...
cv::softdouble::softdouble (const uint64_t )
cv::softdouble::softdouble (const int32_t )
cv::softdouble::softdouble (const int64_t )
cv::softdouble::softdouble (const double a)
Construct from double. 更多...
cv::softfloat::softfloat ()
Default constructor. 更多...
cv::softfloat::softfloat (const softfloat &c)
Copy constructor. 更多...
cv::softfloat::softfloat (const uint32_t )
Construct from integer. 更多...
cv::softfloat::softfloat (const uint64_t )
cv::softfloat::softfloat (const int32_t )
cv::softfloat::softfloat (const int64_t )
cv::softfloat::softfloat (const float a)
Construct from float. 更多...
softfloat cv::abs ( softfloat a)
Absolute value. 更多...
softdouble cv::abs ( softdouble a)
softfloat cv::cbrt (const softfloat &a)
Cube root. 更多...
softdouble cv::cos (const softdouble &a)
Cosine. 更多...
static softfloat cv::softfloat::eps ()
Difference between 1 and next representable value. 更多...
static softdouble cv::softdouble::eps ()
Difference between 1 and next representable value. 更多...
softfloat cv::exp (const softfloat &a)
Exponent. 更多...
softdouble cv::exp (const softdouble &a)
static const softfloat cv::softfloat::fromRaw (const uint32_t a)
Construct from raw. 更多...
static softdouble cv::softdouble::fromRaw (const uint64_t a)
Construct from raw. 更多...
int cv::softfloat::getExp () const
Get 0-based exponent. 更多...
int cv::softdouble::getExp () const
Get 0-based exponent. 更多...
softfloat cv::softfloat::getFrac () const
Get a fraction part. 更多...
softdouble cv::softdouble::getFrac () const
Get a fraction part. 更多...
bool cv::softfloat::getSign () const
Get sign bit. 更多...
bool cv::softdouble::getSign () const
Get sign bit. 更多...
static softfloat cv::softfloat::inf ()
Positive infinity constant. 更多...
static softdouble cv::softdouble::inf ()
Positive infinity constant. 更多...
bool cv::softfloat::isInf () const
Inf state indicator. 更多...
bool cv::softdouble::isInf () const
Inf state indicator. 更多...
bool cv::softfloat::isNaN () const
NaN state indicator. 更多...
bool cv::softdouble::isNaN () const
NaN state indicator. 更多...
bool cv::softfloat::isSubnormal () const
Subnormal number indicator. 更多...
bool cv::softdouble::isSubnormal () const
Subnormal number indicator. 更多...
softfloat cv::log (const softfloat &a)
Natural logarithm. 更多...
softdouble cv::log (const softdouble &a)
static softfloat cv::softfloat::max ()
Biggest finite value. 更多...
static softdouble cv::softdouble::max ()
Biggest finite value. 更多...
softfloat cv::max (const softfloat &a, const softfloat &b)
softdouble cv::max (const softdouble &a, const softdouble &b)
static softfloat cv::softfloat::min ()
Smallest normalized value. 更多...
static softdouble cv::softdouble::min ()
Smallest normalized value. 更多...
softfloat cv::min (const softfloat &a, const softfloat &b)
Min and Max functions. 更多...
softdouble cv::min (const softdouble &a, const softdouble &b)
softfloat cv::mulAdd (const softfloat &a, const softfloat &b, const softfloat &c)
Fused Multiplication and Addition. 更多...
softdouble cv::mulAdd (const softdouble &a, const softdouble &b, const softdouble &c)
static softfloat cv::softfloat::nan ()
Default NaN constant. 更多...
static softdouble cv::softdouble::nan ()
Default NaN constant. 更多...
static softfloat cv::softfloat::one ()
One constant. 更多...
static softdouble cv::softdouble::one ()
One constant. 更多...
cv::softdouble::operator double () const
cv::softfloat::operator float () const
cv::softfloat::operator softdouble () const
Type casts. 更多...
cv::softdouble::operator softfloat () const
Type casts. 更多...
bool cv::softfloat::operator!= (const softfloat &) const
bool cv::softdouble::operator!= (const softdouble &) const
softfloat cv::softfloat::operator% (const softfloat &) const
Remainder operator. 更多...
softdouble cv::softdouble::operator% (const softdouble &) const
Remainder operator. 更多...
softfloat & cv::softfloat::operator%= (const softfloat &a)
softdouble & cv::softdouble::operator%= (const softdouble &a)
softfloat cv::softfloat::operator* (const softfloat &) const
softdouble cv::softdouble::operator* (const softdouble &) const
softfloat & cv::softfloat::operator*= (const softfloat &a)
softdouble & cv::softdouble::operator*= (const softdouble &a)
softfloat cv::softfloat::operator+ (const softfloat &) const
Basic arithmetics. 更多...
softdouble cv::softdouble::operator+ (const softdouble &) const
Basic arithmetics. 更多...
softfloat & cv::softfloat::operator+= (const softfloat &a)
softdouble & cv::softdouble::operator+= (const softdouble &a)
softfloat cv::softfloat::operator- (const softfloat &) const
softfloat cv::softfloat::operator- () const
softdouble cv::softdouble::operator- (const softdouble &) const
softdouble cv::softdouble::operator- () const
softfloat & cv::softfloat::operator-= (const softfloat &a)
softdouble & cv::softdouble::operator-= (const softdouble &a)
softfloat cv::softfloat::operator/ (const softfloat &) const
softdouble cv::softdouble::operator/ (const softdouble &) const
softfloat & cv::softfloat::operator/= (const softfloat &a)
softdouble & cv::softdouble::operator/= (const softdouble &a)
bool cv::softfloat::operator< (const softfloat &) const
bool cv::softdouble::operator< (const softdouble &) const
bool cv::softfloat::operator<= (const softfloat &) const
bool cv::softdouble::operator<= (const softdouble &) const
softfloat & cv::softfloat::operator= (const softfloat &c)
Assign constructor. 更多...
softdouble & cv::softdouble::operator= (const softdouble &c)
Assign constructor. 更多...
bool cv::softfloat::operator== (const softfloat &) const
Comparison operations. 更多...
bool cv::softdouble::operator== (const softdouble &) const
Comparison operations. 更多...
bool cv::softfloat::operator> (const softfloat &) const
bool cv::softdouble::operator> (const softdouble &) const
bool cv::softfloat::operator>= (const softfloat &) const
bool cv::softdouble::operator>= (const softdouble &) const
static softfloat cv::softfloat::pi ()
Correct pi approximation. 更多...
static softdouble cv::softdouble::pi ()
Correct pi approximation. 更多...
softfloat cv::pow (const softfloat &a, const softfloat &b)
Raising to the power. 更多...
softdouble cv::pow (const softdouble &a, const softdouble &b)
template<typename _Tp >
static _Tp cv::saturate_cast ( softfloat a)
Saturate casts. 更多...
template<typename _Tp >
static _Tp cv::saturate_cast ( softdouble a)
template<>
int64_t cv::saturate_cast< int64_t > ( softfloat a)
template<>
int64_t cv::saturate_cast< int64_t > ( softdouble a)
template<>
schar cv::saturate_cast< schar > ( softfloat a)
template<>
schar cv::saturate_cast< schar > ( softdouble a)
template<>
short cv::saturate_cast< short > ( softfloat a)
template<>
short cv::saturate_cast< short > ( softdouble a)
template<>
uchar cv::saturate_cast< uchar > ( softfloat a)
template<>
uchar cv::saturate_cast< uchar > ( softdouble a)
template<>
uint64_t cv::saturate_cast< uint64_t > ( softfloat a)
template<>
uint64_t cv::saturate_cast< uint64_t > ( softdouble a)
template<>
unsigned cv::saturate_cast< unsigned > ( softfloat a)
Saturate cast to unsigned integer and unsigned long long integer We intentionally do not clip negative numbers, to make -1 become 0xffffffff etc. 更多...
template<>
unsigned cv::saturate_cast< unsigned > ( softdouble a)
template<>
ushort cv::saturate_cast< ushort > ( softfloat a)
template<>
ushort cv::saturate_cast< ushort > ( softdouble a)
softfloat cv::softfloat::setExp (int e) const
Construct a copy with new 0-based exponent. 更多...
softdouble cv::softdouble::setExp (int e) const
Construct a copy with new 0-based exponent. 更多...
softfloat cv::softfloat::setFrac (const softfloat &s) const
Construct a copy with provided significand. 更多...
softdouble cv::softdouble::setFrac (const softdouble &s) const
Construct a copy with provided significand. 更多...
softfloat cv::softfloat::setSign (bool sign) const
Construct a copy with new sign bit. 更多...
softdouble cv::softdouble::setSign (bool sign) const
Construct a copy with new sign bit. 更多...
softdouble cv::sin (const softdouble &a)
Sine. 更多...
softfloat cv::sqrt (const softfloat &a)
Square root. 更多...
softdouble cv::sqrt (const softdouble &a)
static softfloat cv::softfloat::zero ()
Zero constant. 更多...
static softdouble cv::softdouble::zero ()
Zero constant. 更多...

变量

uint32_t cv::softfloat::v
uint64_t cv::softdouble::v

详细描述

SoftFloat is a software implementation of floating-point calculations according to IEEE 754 standard. All calculations are done in integers, that's why they are machine-independent and bit-exact. This library can be useful in accuracy-critical parts like look-up tables generation, tests, etc. OpenCV contains a subset of SoftFloat partially rewritten to C++.

Types

There are two basic types: softfloat and softdouble . These types are binary compatible with float and double types respectively and support conversions to/from them. Other types from original SoftFloat library like fp16 or fp128 were thrown away as well as quiet/signaling NaN support, on-the-fly rounding mode switch and exception flags (though exceptions can be implemented in the future).

Operations

Both types support the following:

  • Construction from signed and unsigned 32-bit and 64 integers, float/double or raw binary representation
  • Conversions between each other, to float or double and to int using cvRound , cvTrunc , cvFloor , cvCeil or a bunch of saturate_cast functions
  • Add, subtract, multiply, divide, remainder, square root, FMA with absolute precision
  • Comparison operations
  • Explicit sign, exponent and significand manipulation through get/set methods, number state indicators (isInf, isNan, isSubnormal)
  • Type-specific constants like eps, minimum/maximum value, best pi approximation, etc.
  • min() , max() , abs() , exp() , log() and pow() 函数

函数文档编制

softdouble() [1/7]

cv::softdouble::softdouble ( )
inline

#include < opencv2/core/softfloat.hpp >

Default constructor.

softdouble() [2/7]

cv::softdouble::softdouble ( const softdouble & c )
inline

#include < opencv2/core/softfloat.hpp >

Copy constructor.

softdouble() [3/7]

cv::softdouble::softdouble ( const uint32_t )
explicit

#include < opencv2/core/softfloat.hpp >

Construct from integer.

softdouble() [4/7]

cv::softdouble::softdouble ( const uint64_t )
explicit

softdouble() [5/7]

cv::softdouble::softdouble ( const int32_t )
explicit

softdouble() [6/7]

cv::softdouble::softdouble ( const int64_t )
explicit

softdouble() [7/7]

cv::softdouble::softdouble ( const double a )
inline explicit

#include < opencv2/core/softfloat.hpp >

Construct from double.

softfloat() [1/7]

cv::softfloat::softfloat ( )
inline

#include < opencv2/core/softfloat.hpp >

Default constructor.

softfloat() [2/7]

cv::softfloat::softfloat ( const softfloat & c )
inline

#include < opencv2/core/softfloat.hpp >

Copy constructor.

softfloat() [3/7]

cv::softfloat::softfloat ( const uint32_t )
explicit

#include < opencv2/core/softfloat.hpp >

Construct from integer.

softfloat() [4/7]

cv::softfloat::softfloat ( const uint64_t )
explicit

softfloat() [5/7]

cv::softfloat::softfloat ( const int32_t )
explicit

softfloat() [6/7]

cv::softfloat::softfloat ( const int64_t )
explicit

softfloat() [7/7]

cv::softfloat::softfloat ( const float a )
inline explicit

#include < opencv2/core/softfloat.hpp >

Construct from float.

abs() [1/2]

softfloat cv::abs ( softfloat a )
inline

#include < opencv2/core/softfloat.hpp >

Absolute value.

abs() [2/2]

cbrt()

softfloat cv::cbrt ( const softfloat & a )

#include < opencv2/core/softfloat.hpp >

Cube root.

Special cases:

  • cbrt(NaN) is NaN
  • cbrt(+/-Inf) is +/-Inf

cos()

eps() [1/2]

static softfloat cv::softfloat::eps ( )
inline static

#include < opencv2/core/softfloat.hpp >

Difference between 1 and next representable value.

eps() [2/2]

static softdouble cv::softdouble::eps ( )
inline static

#include < opencv2/core/softfloat.hpp >

Difference between 1 and next representable value.

exp() [1/2]

softfloat cv::exp ( const softfloat & a )
Python:
dst = cv.exp( src[, dst] )

#include < opencv2/core/softfloat.hpp >

Exponent.

Special cases:

  • exp(NaN) is NaN
  • exp(-Inf) == 0
  • exp(+Inf) == +Inf
范例:
samples/cpp/polar_transforms.cpp .

exp() [2/2]

softdouble cv::exp ( const softdouble & a )
Python:
dst = cv.exp( src[, dst] )

fromRaw() [1/2]

static const softfloat cv::softfloat::fromRaw ( const uint32_t a )
inline static

#include < opencv2/core/softfloat.hpp >

Construct from raw.

Builds new value from raw binary representation

fromRaw() [2/2]

static softdouble cv::softdouble::fromRaw ( const uint64_t a )
inline static

#include < opencv2/core/softfloat.hpp >

Construct from raw.

Builds new value from raw binary representation

getExp() [1/2]

int cv::softfloat::getExp ( ) const
inline

#include < opencv2/core/softfloat.hpp >

Get 0-based exponent.

getExp() [2/2]

int cv::softdouble::getExp ( ) const
inline

#include < opencv2/core/softfloat.hpp >

Get 0-based exponent.

getFrac() [1/2]

softfloat cv::softfloat::getFrac ( ) const
inline

#include < opencv2/core/softfloat.hpp >

Get a fraction part.

Returns a number 1 <= x < 2 with the same significand

getFrac() [2/2]

softdouble cv::softdouble::getFrac ( ) const
inline

#include < opencv2/core/softfloat.hpp >

Get a fraction part.

Returns a number 1 <= x < 2 with the same significand

getSign() [1/2]

bool cv::softfloat::getSign ( ) const
inline

#include < opencv2/core/softfloat.hpp >

Get sign bit.

getSign() [2/2]

bool cv::softdouble::getSign ( ) const
inline

#include < opencv2/core/softfloat.hpp >

Get sign bit.

inf() [1/2]

static softfloat cv::softfloat::inf ( )
inline static

#include < opencv2/core/softfloat.hpp >

Positive infinity constant.

inf() [2/2]

static softdouble cv::softdouble::inf ( )
inline static

#include < opencv2/core/softfloat.hpp >

Positive infinity constant.

isInf() [1/2]

bool cv::softfloat::isInf ( ) const
inline

#include < opencv2/core/softfloat.hpp >

Inf state indicator.

isInf() [2/2]

bool cv::softdouble::isInf ( ) const
inline

#include < opencv2/core/softfloat.hpp >

Inf state indicator.

isNaN() [1/2]

bool cv::softfloat::isNaN ( ) const
inline

#include < opencv2/core/softfloat.hpp >

NaN state indicator.

isNaN() [2/2]

bool cv::softdouble::isNaN ( ) const
inline

#include < opencv2/core/softfloat.hpp >

NaN state indicator.

isSubnormal() [1/2]

bool cv::softfloat::isSubnormal ( ) const
inline

#include < opencv2/core/softfloat.hpp >

Subnormal number indicator.

isSubnormal() [2/2]

bool cv::softdouble::isSubnormal ( ) const
inline

#include < opencv2/core/softfloat.hpp >

Subnormal number indicator.

log() [1/2]

softfloat cv::log ( const softfloat & a )
Python:
dst = cv.log( src[, dst] )

#include < opencv2/core/softfloat.hpp >

Natural logarithm.

Special cases:

  • log(NaN), log(x < 0) are NaN
  • log(0) == -Inf
范例:
samples/cpp/polar_transforms.cpp ,和 samples/cpp/stitching_detailed.cpp .

log() [2/2]

softdouble cv::log ( const softdouble & a )
Python:
dst = cv.log( src[, dst] )

max() [1/4]

static softfloat cv::softfloat::max ( )
inline static

#include < opencv2/core/softfloat.hpp >

Biggest finite value.

max() [2/4]

static softdouble cv::softdouble::max ( )
inline static

#include < opencv2/core/softfloat.hpp >

Biggest finite value.

max() [3/4]

max() [4/4]

softdouble cv::max ( const softdouble & a ,
const softdouble & b
)
inline
Python:
dst = cv.max( src1, src2[, dst] )

min() [1/4]

static softfloat cv::softfloat::min ( )
inline static

#include < opencv2/core/softfloat.hpp >

Smallest normalized value.

min() [2/4]

static softdouble cv::softdouble::min ( )
inline static

#include < opencv2/core/softfloat.hpp >

Smallest normalized value.

min() [3/4]

min() [4/4]

softdouble cv::min ( const softdouble & a ,
const softdouble & b
)
inline
Python:
dst = cv.min( src1, src2[, dst] )

mulAdd() [1/2]

softfloat cv::mulAdd ( const softfloat & a ,
const softfloat & b ,
const softfloat & c
)

#include < opencv2/core/softfloat.hpp >

Fused Multiplication and Addition.

Computes (a*b)+c with single rounding

mulAdd() [2/2]

softdouble cv::mulAdd ( const softdouble & a ,
const softdouble & b ,
const softdouble & c
)

nan() [1/2]

static softfloat cv::softfloat::nan ( )
inline static

#include < opencv2/core/softfloat.hpp >

Default NaN constant.

nan() [2/2]

static softdouble cv::softdouble::nan ( )
inline static

#include < opencv2/core/softfloat.hpp >

Default NaN constant.

one() [1/2]

static softfloat cv::softfloat::one ( )
inline static

#include < opencv2/core/softfloat.hpp >

One constant.

one() [2/2]

static softdouble cv::softdouble::one ( )
inline static

#include < opencv2/core/softfloat.hpp >

One constant.

operator double()

cv::softdouble::operator double ( ) const
inline

operator float()

cv::softfloat::operator float ( ) const
inline

operator softdouble()

cv::softfloat::operator softdouble ( ) const

#include < opencv2/core/softfloat.hpp >

Type casts.

operator softfloat()

cv::softdouble::operator softfloat ( ) const

#include < opencv2/core/softfloat.hpp >

Type casts.

operator!=() [1/2]

bool cv::softfloat::operator!= ( const softfloat & ) const

operator!=() [2/2]

bool cv::softdouble::operator!= ( const softdouble & ) const

operator%() [1/2]

softfloat cv::softfloat::operator% ( const softfloat & ) const

#include < opencv2/core/softfloat.hpp >

Remainder operator.

A quote from original SoftFloat manual:

The IEEE Standard remainder operation computes the value a - n * b, where n is the integer closest to a / b. If a / b is exactly halfway between two integers, n is the even integer closest to a / b. The IEEE Standard’s remainder operation is always exact and so requires no rounding. Depending on the relative magnitudes of the operands, the remainder functions can take considerably longer to execute than the other SoftFloat functions. This is an inherent characteristic of the remainder operation itself and is not a flaw in the SoftFloat implementation.

operator%() [2/2]

softdouble cv::softdouble::operator% ( const softdouble & ) const

#include < opencv2/core/softfloat.hpp >

Remainder operator.

A quote from original SoftFloat manual:

The IEEE Standard remainder operation computes the value a - n * b, where n is the integer closest to a / b. If a / b is exactly halfway between two integers, n is the even integer closest to a / b. The IEEE Standard’s remainder operation is always exact and so requires no rounding. Depending on the relative magnitudes of the operands, the remainder functions can take considerably longer to execute than the other SoftFloat functions. This is an inherent characteristic of the remainder operation itself and is not a flaw in the SoftFloat implementation.

operator%=() [1/2]

softfloat & cv::softfloat::operator%= ( const softfloat & a )
inline

operator%=() [2/2]

softdouble & cv::softdouble::operator%= ( const softdouble & a )
inline

operator*() [1/2]

softfloat cv::softfloat::operator* ( const softfloat & ) const

operator*() [2/2]

softdouble cv::softdouble::operator* ( const softdouble & ) const

operator*=() [1/2]

softfloat & cv::softfloat::operator*= ( const softfloat & a )
inline

operator*=() [2/2]

softdouble & cv::softdouble::operator*= ( const softdouble & a )
inline

operator+() [1/2]

softfloat cv::softfloat::operator+ ( const softfloat & ) const

#include < opencv2/core/softfloat.hpp >

Basic arithmetics.

operator+() [2/2]

softdouble cv::softdouble::operator+ ( const softdouble & ) const

#include < opencv2/core/softfloat.hpp >

Basic arithmetics.

operator+=() [1/2]

softfloat & cv::softfloat::operator+= ( const softfloat & a )
inline

operator+=() [2/2]

softdouble & cv::softdouble::operator+= ( const softdouble & a )
inline

operator-() [1/4]

softfloat cv::softfloat::operator- ( const softfloat & ) const

operator-() [2/4]

softfloat cv::softfloat::operator- ( ) const
inline

operator-() [3/4]

softdouble cv::softdouble::operator- ( const softdouble & ) const

operator-() [4/4]

softdouble cv::softdouble::operator- ( ) const
inline

operator-=() [1/2]

softfloat & cv::softfloat::operator-= ( const softfloat & a )
inline

operator-=() [2/2]

softdouble & cv::softdouble::operator-= ( const softdouble & a )
inline

operator/() [1/2]

softfloat cv::softfloat::operator/ ( const softfloat & ) const

operator/() [2/2]

softdouble cv::softdouble::operator/ ( const softdouble & ) const

operator/=() [1/2]

softfloat & cv::softfloat::operator/= ( const softfloat & a )
inline

operator/=() [2/2]

softdouble & cv::softdouble::operator/= ( const softdouble & a )
inline

operator<() [1/2]

bool cv::softfloat::operator< ( const softfloat & ) const

operator<() [2/2]

bool cv::softdouble::operator< ( const softdouble & ) const

operator<=() [1/2]

bool cv::softfloat::operator<= ( const softfloat & ) const

operator<=() [2/2]

bool cv::softdouble::operator<= ( const softdouble & ) const

operator=() [1/2]

softfloat & cv::softfloat::operator= ( const softfloat & c )
inline

#include < opencv2/core/softfloat.hpp >

Assign constructor.

operator=() [2/2]

softdouble & cv::softdouble::operator= ( const softdouble & c )
inline

#include < opencv2/core/softfloat.hpp >

Assign constructor.

operator==() [1/2]

bool cv::softfloat::operator== ( const softfloat & ) const

#include < opencv2/core/softfloat.hpp >

Comparison operations.

  • Any operation with NaN produces false
    • The only exception is when x is NaN: x != y for any y.
  • Positive and negative zeros are equal

operator==() [2/2]

bool cv::softdouble::operator== ( const softdouble & ) const

#include < opencv2/core/softfloat.hpp >

Comparison operations.

  • Any operation with NaN produces false
    • The only exception is when x is NaN: x != y for any y.
  • Positive and negative zeros are equal

operator>() [1/2]

bool cv::softfloat::operator> ( const softfloat & ) const

operator>() [2/2]

bool cv::softdouble::operator> ( const softdouble & ) const

operator>=() [1/2]

bool cv::softfloat::operator>= ( const softfloat & ) const

operator>=() [2/2]

bool cv::softdouble::operator>= ( const softdouble & ) const

pi() [1/2]

static softfloat cv::softfloat::pi ( )
inline static

#include < opencv2/core/softfloat.hpp >

Correct pi approximation.

pi() [2/2]

static softdouble cv::softdouble::pi ( )
inline static

#include < opencv2/core/softfloat.hpp >

Correct pi approximation.

pow() [1/2]

softfloat cv::pow ( const softfloat & a ,
const softfloat & b
)
Python:
dst = cv.pow( src, power[, dst] )

#include < opencv2/core/softfloat.hpp >

Raising to the power.

Special cases:

  • x**NaN is NaN for any x
  • ( |x| == 1 )**Inf is NaN
  • ( |x| > 1 )**+Inf or ( |x| < 1 )**-Inf is +Inf
  • ( |x| > 1 )**-Inf or ( |x| < 1 )**+Inf is 0
  • x ** 0 == 1 for any x
  • x ** 1 == 1 for any x
  • NaN ** y is NaN for any other y
  • Inf**(y < 0) == 0
  • Inf ** y is +Inf for any other y
  • (x < 0)**y is NaN for any other y if x can't be correctly rounded to integer
  • 0 ** 0 == 1
  • 0 ** (y < 0) is +Inf
  • 0 ** (y > 0) is 0
范例:
samples/cpp/distrans.cpp .

pow() [2/2]

softdouble cv::pow ( const softdouble & a ,
const softdouble & b
)
Python:
dst = cv.pow( src, power[, dst] )

saturate_cast() [1/2]

template<typename _Tp >
static _Tp cv::saturate_cast ( softfloat a )
inline static

#include < opencv2/core/softfloat.hpp >

Saturate casts.

saturate_cast() [2/2]

template<typename _Tp >
static _Tp cv::saturate_cast ( softdouble a )
inline static

saturate_cast< int64_t >() [1/2]

saturate_cast< int64_t >() [2/2]

saturate_cast< schar >() [1/2]

saturate_cast< schar >() [2/2]

saturate_cast< short >() [1/2]

template<>
short cv::saturate_cast < short > ( softfloat a )
inline

saturate_cast< short >() [2/2]

template<>
short cv::saturate_cast < short > ( softdouble a )
inline

saturate_cast< uchar >() [1/2]

saturate_cast< uchar >() [2/2]

saturate_cast< uint64_t >() [1/2]

saturate_cast< uint64_t >() [2/2]

saturate_cast< unsigned >() [1/2]

template<>
unsigned cv::saturate_cast < unsigned > ( softfloat a )
inline

#include < opencv2/core/softfloat.hpp >

Saturate cast to unsigned integer and unsigned long long integer We intentionally do not clip negative numbers, to make -1 become 0xffffffff etc.

saturate_cast< unsigned >() [2/2]

template<>
unsigned cv::saturate_cast < unsigned > ( softdouble a )
inline

saturate_cast< ushort >() [1/2]

saturate_cast< ushort >() [2/2]

setExp() [1/2]

softfloat cv::softfloat::setExp ( int e ) const
inline

#include < opencv2/core/softfloat.hpp >

Construct a copy with new 0-based exponent.

setExp() [2/2]

softdouble cv::softdouble::setExp ( int e ) const
inline

#include < opencv2/core/softfloat.hpp >

Construct a copy with new 0-based exponent.

setFrac() [1/2]

softfloat cv::softfloat::setFrac ( const softfloat & s ) const
inline

#include < opencv2/core/softfloat.hpp >

Construct a copy with provided significand.

Constructs a copy of a number with significand taken from parameter

setFrac() [2/2]

softdouble cv::softdouble::setFrac ( const softdouble & s ) const
inline

#include < opencv2/core/softfloat.hpp >

Construct a copy with provided significand.

Constructs a copy of a number with significand taken from parameter

setSign() [1/2]

softfloat cv::softfloat::setSign ( bool sign ) const
inline

#include < opencv2/core/softfloat.hpp >

Construct a copy with new sign bit.

setSign() [2/2]

softdouble cv::softdouble::setSign ( bool sign ) const
inline

#include < opencv2/core/softfloat.hpp >

Construct a copy with new sign bit.

sin()

sqrt() [1/2]

sqrt() [2/2]

softdouble cv::sqrt ( const softdouble & a )
Python:
dst = cv.sqrt( src[, dst] )

zero() [1/2]

static softfloat cv::softfloat::zero ( )
inline static

#include < opencv2/core/softfloat.hpp >

Zero constant.

zero() [2/2]

static softdouble cv::softdouble::zero ( )
inline static

#include < opencv2/core/softfloat.hpp >

Zero constant.

Variable Documentation

v [1/2]

uint32_t cv::softfloat::v

v [2/2]

uint64_t cv::softdouble::v