本文整理汇总了C++中MatShape::empty方法的典型用法代码示例。如果您正苦于以下问题：C++ MatShape::empty方法的具体用法？C++ MatShape::empty怎么用？C++ MatShape::empty使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类MatShape的用法示例。
在下文中一共展示了MatShape::empty方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: total
static inline int total(const MatShape& shape, int start = -1, int end = -1)
{
if (start == -1) start = 0;
if (end == -1) end = (int)shape.size();
if (shape.empty())
return 0;
int elems = 1;
CV_Assert(start <= (int)shape.size() && end <= (int)shape.size() &&
start <= end);
for(int i = start; i < end; i++)
{
elems *= shape[i];
}
return elems;
}示例2: computeShapeByReshapeMask
static void computeShapeByReshapeMask(const MatShape &srcShape,
const MatShape &maskShape,
Range srcRange /*= Range::all()*/,
MatShape& dstShape)
{
int srcShapeSize = (int)srcShape.size();
int maskShapeSize = (int)maskShape.size();
if (srcRange == Range::all())
srcRange = Range(0, srcShapeSize);
else
{
int sz = srcRange.size();
srcRange.start = clamp(srcRange.start, srcShapeSize);
srcRange.end = srcRange.end == INT_MAX ? srcShapeSize : srcRange.start + sz;
}
bool explicitMask = !maskShape.empty(); // All mask values are positive.
for (int i = 0, n = maskShape.size(); i < n && explicitMask; ++i)
{
explicitMask = maskShape[i] > 0;
}
// Working range of source shape is a range where area(src) == area(mask).
if (explicitMask)
{
int maskTotal = total(maskShape);
// Go from the end of mask until we collect required total.
bool matched = false;
for (int i = srcRange.end - 1; i >= srcRange.start; --i)
{
if (matched)
{
if (i == 0 || total(srcShape, i, srcRange.end) != maskTotal)
{
srcRange.start = i + 1;
break;
}
}
else
{
matched = total(srcShape, i, srcRange.end) == maskTotal;
}
}
CV_Assert(total(srcShape, srcRange.start, srcRange.end) == maskTotal);
}
CV_Assert(0 <= srcRange.start && srcRange.start <= srcRange.end && srcRange.end <= srcShapeSize);
int dstShapeSize = srcShapeSize - srcRange.size() + maskShapeSize;
dstShape.resize(dstShapeSize);
std::copy(srcShape.begin(), srcShape.begin() + srcRange.start, dstShape.begin());
std::copy(srcShape.begin() + srcRange.end, srcShape.begin() + srcShapeSize, dstShape.begin() + srcRange.start + maskShapeSize);
int inferDim = -1;
for (int i = 0; i < maskShapeSize; i++)
{
if (maskShape[i] > 0)
{
dstShape[srcRange.start + i] = maskShape[i];
}
else if (maskShape[i] == 0)
{
if (srcRange.start + i >= srcShapeSize)
CV_Error(Error::StsBadArg, format("Copy dim[%d] (which has zero size) is out of the source shape bounds", srcRange.start + i));
dstShape[srcRange.start + i] = srcShape[srcRange.start + i];
}
else if (maskShape[i] == -1)
{
if (inferDim != -1)
CV_Error(Error::StsAssert, "Duplicate of inferred dim (which is denoted by -1)");
inferDim = srcRange.start + i;
dstShape[inferDim] = 1;
}
else
CV_Error(Error::StsBadArg, "maskShape[i] >= -1");
}
size_t srcTotal = total(srcShape);
size_t dstTotal = total(dstShape);
if (inferDim != -1)
{
if (srcTotal % dstTotal != 0)
CV_Error(Error::StsBackTrace, "Can't infer a dim denoted by -1");
dstShape[inferDim] = (int)(srcTotal / dstTotal);
}
else
{
CV_Assert(srcTotal == dstTotal);
}
}