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c++ Programming Glossary: rowOpenCv 2.3 C - How to isolate object inside image http://stackoverflow.com/questions/10315551/opencv-2-3-c-how-to-isolate-object-inside-image image i have an image like i want to remove the black rows and cols round the number. So i want that the result is i try.. good cause i try to check if in new image there are black rows or cols and they are present. what can i do can someone help.. Notice that in the resulting image there is one extra row column of pixels in the border that are not white. Well they..
http://stackoverflow.com/questions/1120140/csv-parser-in-c return result I would just create a class representing a row. Then stream into that object #include iterator #include iostream.. str return str int main std ifstream file plop.csv CSVRow row while file row std cout 4th Element row 3 n But with a little.. int main std ifstream file plop.csv CSVRow row while file row std cout 4th Element row 3 n But with a little work we could..
Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513? http://stackoverflow.com/questions/11413855/why-is-transposing-a-matrix-of-512x512-much-slower-than-transposing-a-matrix-of detailed info see the wiki entry on caching I'm gonna narrow it down here. A cache is organized in sets and lines . At a.. critical stride would be 2048 bytes which correspond to 4 rows of the matrix which is continuous in memory . Assume we're.. which is continuous in memory . Assume we're processing row 28. We're attempting to take the elements of this row and swap..
When can outer braces be omitted in an initializer list? http://stackoverflow.com/questions/11734861/when-can-outer-braces-be-omitted-in-an-initializer-list braced initialization 1 3 and 5 initialize the first row of the array y 0 namely y 0 0 y 0 1 and y 0 2 . Likewise the..
Why is my program slow when looping over exactly 8192 elements? http://stackoverflow.com/questions/12264970/why-is-my-program-slow-when-looping-over-exactly-8192-elements array You are iterating the matrix column wise instead of row wise. To solve this problem you should interchange the two loops...
What is “cache-friendly” code? http://stackoverflow.com/questions/16699247/what-is-cache-friendly-code sometimes forget is column major ex. fortran matlab vs. row major ordering ex. c c for storing two dimensional arrays. For.. For example consider the following matrix 1 2 3 4 In row major ordering this is stored in memory as 1 2 3 4 in column.. memory accesses Not exploiting the ordering e.g. changing row index first in c M 0 0 memory M 1 0 memory M 0 1 memory M 1..
How do I best handle dynamic multi-dimensional arrays in C/C++? http://stackoverflow.com/questions/365782/how-do-i-best-handle-dynamic-multi-dimensional-arrays-in-c-c void main String args Scanner sc new Scanner System.in int rows sc.nextInt int cols sc.nextInt int data new int rows cols manipulate.. int rows sc.nextInt int cols sc.nextInt int data new int rows cols manipulate data public static void manipulate int data.. single dimensional array as Guge said below You can alloc rows cols sizeof int and access it by table row cols col . . There..
How can I read and manipulate CSV file data in C++? http://stackoverflow.com/questions/415515/how-can-i-read-and-manipulate-csv-file-data-in-c std vector Customer customers Read and write a single row at a time rather than keeping a complete in memory representation.. sizeof Customer vs. the number of bytes in a single row . CSVReader and CSVWriter can be reused as the basis for an..
Simple object detection using OpenCV and machine learning http://stackoverflow.com/questions/6416117/simple-object-detection-using-opencv-and-machine-learning just have to find a way to transform a contour into a row of data to teach the KNN. So... suggestions Thanks in advance...
May I treat a 2D array as a contiguous 1D array? http://stackoverflow.com/questions/7269099/may-i-treat-a-2d-array-as-a-contiguous-1d-array p 1234 you're indexing the 1234th element of the zeroth row of only 80 columns. Some interpret the only valid indices to..
Boost::Spirit::QI parser: index of parsed element http://stackoverflow.com/questions/12769907/boostspiritqi-parser-index-of-parsed-element result typedef bool type template typename Matrix typename Row typename Col typename Value bool operator Matrix m Row r Col.. Row typename Col typename Value bool operator Matrix m Row r Col c Value v const if r m.rows c m.columns m.data r c..
Why this code doesnt work? (c++ OOP) public inherits http://stackoverflow.com/questions/14444238/why-this-code-doesnt-work-c-oop-public-inherits A public B1 class D public B2 int main B2 b D d A a b Row 27 error a d Base class 'A' is ambiguous Row 28 return 0 Why.. b D d A a b Row 27 error a d Base class 'A' is ambiguous Row 28 return 0 Why does the code in Row27 work but the code in.. 'A' is ambiguous Row 28 return 0 Why does the code in Row27 work but the code in Row28 doesnt Thank in advance Note I..
Need help compiling jpegtran.c code from libjpeg http://stackoverflow.com/questions/14631530/need-help-compiling-jpegtran-c-code-from-libjpeg v_samp_factor TRUE if y_crop_blocks dst_blk_y comp_height Row is within the vertically mirrorable area. src_buffer srcinfo.. offset_y if y_crop_blocks dst_blk_y comp_height Row is within the mirrorable area. src_row_ptr src_buffer compptr..
Get the first column of a matrix represented by a vector of vectors http://stackoverflow.com/questions/15778377/get-the-first-column-of-a-matrix-represented-by-a-vector-of-vectors rows int cols const T initVal T Size and structure int NumRows const return m_rows int NumColumns const return m_cols int.. return m_data idx Simple row or column slices vector T Row int row int colBegin 0 int colEnd 1 const vector T Column int.. rows m_cols cols template class T vector T SimpleMatrix T Row int row int colBegin int colEnd const if colEnd 0 colEnd m_cols..
Good hash function for a 2d index http://stackoverflow.com/questions/2634690/good-hash-function-for-a-2d-index a struct called Point. Point is pretty simple struct Point Row row Column column some other code for addition and subtraction.. code for addition and subtraction of points is there too Row and Column are basically glorified int s but I got sick of accidentally..
PCA + SVM using C++ Syntax in OpenCV 2.2 http://stackoverflow.com/questions/4974709/pca-svm-using-c-syntax-in-opencv-2-2 API only takes a Mat that is formatted by Column or Row. I took the Row approach using the reshape function to fit my.. takes a Mat that is formatted by Column or Row. I took the Row approach using the reshape function to fit my image's matrix..
Problem with functions accepting inner classes of template classes http://stackoverflow.com/questions/7178948/problem-with-functions-accepting-inner-classes-of-template-classes a template class say Matrix T and a subclass say Matrix T Row . Now I want to to write a function which operates on instances.. operates on instances of the subclass say negate Matrix T Row . I tried to declare the function with template class T negate.. function with template class T negate typename Matrix T Row but when I try to use it the compiler tells me that it cannot..
http://stackoverflow.com/questions/17072987/boost-spirit-skipper-issues boost spirit skippers. I need to parse a file like that ROW int int int int int int int ... I am able to parse it without.. stored in a structure struct problemType unsigned int ROW std vector rowType rows the row parser template typename Iterator.. std list unsigned int list struct problemType unsigned int ROW std vector rowType rows BOOST_FUSION_ADAPT_STRUCT rowType unsigned..
How to overload array index operator for wrapper class of 2D array? http://stackoverflow.com/questions/1971201/how-to-overload-array-index-operator-for-wrapper-class-of-2d-array index operator for wrapper class of 2D array #define ROW 3 #define COL 4 class Matrix private int mat ROW COL ..... ....... #define ROW 3 #define COL 4 class Matrix private int mat ROW COL ..... ..... int main Matrix m int a m 0 1 reading m 0 2..
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