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imgproc(cvtColor): slightly improve error messages

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Do not try to process empty inputs.
This commit is contained in:
Alexander Alekhin 2018-08-08 17:09:12 +03:00
parent 9f2edc1135
commit a0cff0be94
2 changed files with 7 additions and 1 deletions
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2
modules/imgproc/src/color.cpp
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@ -178,6 +178,8 @@ void cvtColor( InputArray _src, OutputArray _dst, int code, int dcn )
{
CV_INSTRUMENT_REGION()
CV_Assert(!_src.empty());
if(dcn <= 0)
dcn = dstChannels(code);

6
modules/imgproc/src/color.hpp
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@ -247,10 +247,14 @@ struct CvtHelper
{
CvtHelper(InputArray _src, OutputArray _dst, int dcn)
{
CV_Assert(!_src.empty());
int stype = _src.type();
scn = CV_MAT_CN(stype), depth = CV_MAT_DEPTH(stype);
CV_Assert( VScn::contains(scn) && VDcn::contains(dcn) && VDepth::contains(depth) );
CV_Check(scn, VScn::contains(scn), "Invalid number of channels in input image");
CV_Check(dcn, VDcn::contains(dcn), "Invalid number of channels in output image");
CV_CheckDepth(depth, VDepth::contains(depth), "Unsupported depth of input image");
if (_src.getObj() == _dst.getObj()) // inplace processing (#6653)
_src.copyTo(src);