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dkogan / mrgingham

Chessboard corner-finder for a camera calibration system
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OpenCV version #1

Closed chazanov closed 5 years ago

chazanov commented 5 years ago

Which OpenCV version is needed?

My opencv4 includes are at /usr/include/opencv4/opencv2 – and are not found: Package 'opencv', required by 'virtual:world', not found

dkogan commented 5 years ago

On March 16, 2019 12:12:45 PM CDT, chazanov notifications@github.com wrote:

Which OpenCV version is needed?>

My opencv4 includes are at /usr/include/opencv4/opencv2 – and are not found:> Package 'opencv', required by 'virtual:world', not found>

Hi. Which distro are you using? So far I've used this only on centos 7 and various flavors of Debian.

baerbock commented 5 years ago

@dkogan I'm sustaining the same error and I'm on ArchLinux.

dkogan commented 5 years ago

On March 16, 2019 5:11:58 PM CDT, baerbock notifications@github.com wrote:

@dkogan I'm sustaining the same error and I'm on ArchLinux.

OK. I'm not an arch linux user. Give me a few days to get to this. What is the exact arch-linux command to install this opencv library?

baerbock commented 5 years ago

pacman -S opencv

dkogan commented 5 years ago

OK, if you pull the latest code it'll mostly work on arch. The remaining issue is that the arch-linux opencv package is not providing pkg-config files. Please file a bug report with the maintainer of that package. This is where the Package 'opencv', required by 'virtual:world', not found error is coming from. You can work-around by applying this patch:

index 8f942c8..edb72b5 100644
--- a/Makefile
+++ b/Makefile
@@ -18,8 +18,8 @@ BIN_SOURCES += test-dump-chessboard-corners.cc test-dump-blobs.cc test-find-grid

 LIB_SOURCES := find_grid.cc find_blobs.cc find_chessboard_corners.cc mrgingham.cc ChESS.c

-CXXFLAGS_CV := $(shell pkg-config --cflags opencv)
-LDLIBS_CV   := $(shell pkg-config --libs   opencv)
+CXXFLAGS_CV := -I/usr/include/opencv4
+LDLIBS_CV   := -lopencv_imgproc -lopencv_imgcodecs -lopencv_features2d -lopencv_core
 CCXXFLAGS += $(CXXFLAGS_CV)
 LDLIBS    += $(LDLIBS_CV) -lpthread

I don't want to commit this because it only makes sense for opencv4 users on arch linux. If you have a better approach, let me know. The library should build then.

By the way, how did you find this? I haven't done any advertising at all.

chazanov commented 5 years ago

@dkogan I have big EARS and EYES and find everything...

When compiling mrgingham my OpenCV seems to be totally broken: https://pastebin.com/x4uikMS6 Weirdly I can actually use it via the Python API

dkogan commented 5 years ago

chazanov notifications@github.com writes:

When compiling mrgingham my OpenCV seems to be totally broken: https:// pastebin.com/x4uikMS6 Weirdly I can actually use it via the Python API

I don't know what you ran to get this output. Can you please include the full set of commands that got you to the errors?