Cv Mat Type

As already properly pointed out by william you should provide only the correct type as a template argument for at i believe that cv mat itself is not made template only for simplification.

Cv mat type. However opencv crew are trying to support c features including templates. N dimensional dense array class. Mat int rows int cols int type this constructor accepts three parameters of integer type representing the number of rows and columns in a 2d array and the type of the array that is to be used to store data. Hi the dnn imagenet ex cpp example in line 141 load image as a matrix rgb pixel.

If the format depth or channel order is different use mat convertto and cv cvtcolor to convert it before saving. Multiple images vector of mat can be saved in tiff format see the code sample below. Type has the same meaning as in cvcreatemat. There are many different ways to create cv mat object.

Here are the some popular ones. While mat is sufficient in most cases mat can be more convenient if you use a lot of element access operations and if you know matrix type at the compilation time. Using cv mat create nrows ncols type method or the similar constructor cv mat mat nrows ncols type fill value constructor. The class mat represents an n dimensional dense numerical single channel or multi channel array.

C mat vec uchar n abs a alpha beta is equivalent to convertscaleabs a c alpha beta the output matrix has the same size and the same type as the input one except for the last case where c is depth cv 8u. Or use the universal filestorage i o functions to save the image to xml or yaml format. A new matrix of the specified size and specifed type will be allocated. Note that mat at int y int x and mat operator int y int x do absolutely the same and run at the same speed but the latter is certainly shorter.

Mat int rows int cols int type scalar s.