obraz | Static blog-aware site generator | Static Site Generator library

You can do this like this:

I found the error.

Instead of

g++ -std=c++14 -o socitest socitest.cpp -I../include/soci/ -I ../include/private/ -I/usr/include/ -L./lib -L/usr/lib/x86_64-linux-gnu -lsoci_core -lsoci_sqlite3 -lsqlite3 -ldl

it should be

g++ -std=c++14 -o socitest socitest.cpp -I../include/ -I./include/ -I/usr/include/ -L./lib -lsoci_core -lsoci_sqlite3 -lsqlite3 -ldl

First of all, I include #include , therefore the -I shoud be ../include/ and not ../include/soci/

I also had installed soci v 3 in the system, so g++ find the old headers and old libraries in /usr/lib/x86_64-linux-gnu and somehow mixed the headers and libraries up with the v 4 and causes the problems mentioned in the question.

You can try:

The problem you have is that your image is of type uint8. The following line:

The main problem with the code is that it writes the result for each pixel into the input image. This result will be used when computing the min value for the next pixel. Thus, the dark patch at the top-left of the image gets propagated across the whole image.

It is important for this type of algorithm to write into a separate output buffer, leaving the input unchanged until the whole image has been processed.

Do note also that the erosion is well defined for gray-value images, but not for color images. You seem to want to apply marginal ordering, which is equivalent to computing the erosion for each channel independently. Be advised that this method will introduce new colors to the image. There are better approaches, but they all have some sort of downside. I wrote a small overview about this some years ago on my blog.

To return a single asset you could just do,