Cv Mat Types C

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

Cv mat types c. If the format depth or channel order is different use mat convertto and cv cvtcolor to convert it before saving. N dimensional dense array class. 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. The first character of the name can be followed by an infinite number of alpha numerical characters including characters like or.

A new matrix of the specified size and specifed type will be allocated. To access multiple channel matrices you can use cv mat elem matrix type i j nchannels channel idx. Type has the same meaning as in cvcreatemat. Cvmat is now obsolete.

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. The parameters which you add to the cv mat must have a name which fits to the following rules. Calculates an absolute value of each matrix element. The class mat represents an n dimensional dense numerical single channel or multi channel array.

There are many different ways to create cv mat object. 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. Multiple images vector of mat can be saved in tiff format see the code sample below. 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.

The class mat represents an n dimensional dense numerical single channel or multi channel array. C abs a is equivalent to absdiff a scalar all 0 c. If you are familiar with the c interface pre version 2 1 implementation of the opencv library you will remember the data types iplimage and cvmat you might also recall cvarr in the c implementation these are all gone replaced with cv mat this means no more dubious casting of void pointers in function arguments and in general is a tremendous enhancement in the internal. Here are the some popular ones.

Consider using mat instead. Abs is a meta function that is expanded to one of absdiff or convertscaleabs forms. Or use the universal filestorage i o functions to save the image to xml or yaml format. Possible parameter names for matrix cv mat.

The name starts with a lower or upper case character hence a value between a z or a z.