Cv Mat Type

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.

Cv mat type. Multiple images vector of mat can be saved in tiff format see the code sample below. Hi the dnn imagenet ex cpp example in line 141 load image as a matrix rgb pixel. A new matrix of the specified size and specifed type will be allocated. Mat int rows int cols int type scalar s.

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. 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. I want to read the image by opencv and i faced the problem to transform the type of cv mat to matrix rgb pixel. Here are the some popular ones.

Using cv mat create nrows ncols type method or the similar constructor cv mat mat nrows ncols type fill value constructor. It can be used to store real or complex valued vectors and matrices grayscale or color images voxel volumes vector fields point clouds tensors histograms though very high dimensional histograms may be better stored in a sparsemat. Type has the same meaning as in cvcreatemat. 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.

Anyone who knows how to deal with the p. If the format depth or channel order is different use mat convertto and cv cvtcolor to convert it before saving. 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.

However opencv crew are trying to support c features including templates.