Hi Nate, Thanks for the help and quick response. It works great with your changes. Do you have any feedback about the way I'm using the library in that example code? I need to iterate through each pixel's channels, do you think there are more efficient ways for accomplishing that? Thanks again, Mark -----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Nathan Crookston Sent: Monday, November 07, 2011 1:20 PM To: boost-users@lists.boost.org Subject: Re: [Boost-users] [Gil] Unknown compilation error (VS10) Hi Mark, On Mon, Nov 7, 2011 at 11:12 AM, Sapp, Mark <Mark.Sapp@aeroflex.com> wrote:
Hi all,
I have encountered a compilation error in Visual Studio 2010 that I can't find any information online about. The error is:
error C2338: (is_same<typename Layout::color_space_t, gray_t>::value) template <typename Out> struct op_absoluteDifference { template <typename T> Out operator()(const T& in1, const T& in2) const { return Out(abs(in2-in1)); } };
Constructing Out is your problem -- you're initializing a multi-channel pixel type (rgb8_pixel_t) with a single value. Either convert to a grayscale image before using calling absoluteDifference, or if you actually want the absolute difference across all channels, call static transform: #include <boost/gil/image.hpp> #include <boost/gil/typedefs.hpp> using namespace boost::gil; struct op_absoluteDifferenceChannel { template <typename T> T operator()(const T& in1, const T& in2) const { return T(abs(in2-in1)); } }; struct op_absoluteDifferencePixel { template <typename T> T operator()(const T& in1, const T& in2) const { T retVal; static_transform(in1, in2, retVal, op_absoluteDifferenceChannel()); return retVal; } }; template <typename SrcView1, typename SrcView2, typename DstView> void absoluteDifference(const SrcView1& src1, const SrcView2& src2, const DstView& dst) { typedef typename channel_type<DstView>::type dst_channel_t; transform_pixels(src1, src2, dst, op_absoluteDifferencePixel()); } int main() { rgb8_image_t img1(100,100); fill_pixels(view(img1), rgb8_pixel_t(0,0,0)); rgb8_image_t img2(100,100); fill_pixels(view(img2), rgb8_pixel_t(10,20,30)); rgb8_image_t img3(100,100); fill_pixels(view(img3), rgb8_pixel_t(0,0,0)); absoluteDifference(const_view(img1), const_view(img2), view(img3)); //causes compilation error C2338: (is_same<typename Layout::color_space_t, gray_t>::value) gray16_image_t img4(100,100); fill_pixels(view(img4), gray16_pixel_t(0)); gray16_image_t img5(100,100); fill_pixels(view(img5), gray16_pixel_t(10)); gray16_image_t img6(100,100); fill_pixels(view(img6), gray16_pixel_t(0)); absoluteDifference(const_view(img4), const_view(img5), view(img6)); return 0; } HTH, Nate _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users Notice: This e-mail is intended solely for use of the individual or entity to which it is addressed and may contain information that is proprietary, privileged, company confidential and/or exempt from disclosure under applicable law. If the reader is not the intended recipient or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If this communication has been transmitted from a U.S. location it may also contain data subject to the International Traffic in Arms Regulations or U.S. Export Administration Regulations and cannot be disseminated, distributed or copied to foreign nationals, residing in the U.S. or abroad, without the prior approval of the U.S. Department of State or appropriate export licensing authority. If you have received this communication in error, please notify the sender by reply e-mail or collect telephone call and delete or destroy all copies of this e-mail message, any physical copies made of this e-mail message and/or any file attachment(s).