Cv Mat Types C

Here are the some popular ones.

Cv mat types c. The class mat represents an n dimensional dense numerical single channel or multi channel array. C abs a b is equivalent to absdiff a b c. 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.

The class mat represents an n dimensional dense numerical single channel or multi channel array. 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. There are many different ways to create cv mat object. Calculates an absolute value of each matrix element.

Possible parameter names for matrix cv mat. Using cv mat create nrows ncols type method or the similar constructor cv mat mat nrows ncols type fill value constructor. Cvmat is now obsolete. N dimensional dense array class.

Or use the universal filestorage i o functions to save the image to xml or yaml format. Multiple images vector of mat can be saved in tiff format see the code sample below. To access multiple channel matrices you can use cv mat elem matrix type i j nchannels channel idx. A new matrix of the specified size and specifed type will be allocated.

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. C abs a is equivalent to absdiff a scalar all 0 c. N dimensional dense array class. If the format depth or channel order is different use mat convertto and cv cvtcolor to convert it before saving.

Consider using mat instead. Abs is a meta function that is expanded to one of absdiff or convertscaleabs forms. The parameters which you add to the cv mat must have a name which fits to the following rules. The name starts with a lower or upper case character hence a value between a z or a z.

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.