remap with INTER_NEAREST and BORDER_CONSTANT (Patch #1681)

Added by Vladislav Vinogradov almost 14 years ago. Updated almost 13 years ago.

Status:	Done	Start date:	2012-03-13
Priority:	Normal	Due date:
Assignee:	Vadim Pisarevsky	% Done:	0%
Category:	imgproc, video
Target version:	2.4.0
Affected version:		Operating System:
Difficulty:		HW Platform:
Pull request:

Description

In cv::remap there is functions tab for nearest interpolation mode:

static RemapNNFunc nn_tab[] =
{
        remapNearest<uchar>, remapNearest<uchar>, remapNearest<ushort>, remapNearest<ushort>,
        remapNearest<int>, remapNearest<int>, remapNearest<double>, 0
};

For types CV_8S, CV_16S and CV_32F it use other integral type with same bit size (for float it use specialization with int, for example).
With BORDER_CONSTANT it cast border value to specified type and use it if need. But for float it cast borderValue to Scalar_<int>, not to Scalar_<float>. So it assign integer values to float data, in fact doing reinterpret casting.

imgwarp.cpp.patch (683 Bytes) Vladislav Vinogradov, 2012-03-13 11:33 am