Cv Mat Type

Hi the dnn imagenet ex cpp example in line 141 load image as a matrix rgb pixel.

Cv mat type.

A new matrix of the specified size and specifed type will be allocated. Multiple images vector of mat can be saved in tiff format see the code sample below. 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. 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.

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. 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. Using cv mat create nrows ncols type method or the similar constructor cv mat mat nrows ncols type fill value constructor.

However opencv crew are trying to support c features including templates. 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. The class mat represents an n dimensional dense numerical single channel or multi channel array. Here are the some popular ones.

There are many different ways to create cv mat object. 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. Or use the universal filestorage i o functions to save the image to xml or yaml format. 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.

Mat int rows int cols int type scalar s.