Calculates an absolute value of each matrix element.
Cv mat types 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.
Using cv mat create nrows ncols type method or the similar constructor cv mat mat nrows ncols type fill value constructor.
There are many different ways to create cv mat object.
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.
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.
If the format depth or channel order is different use mat convertto and cv cvtcolor to convert it before saving.
The first character of the name can be followed by an infinite number of alpha numerical characters including characters like or.
Possible parameter names for matrix cv mat.
The parameters which you add to the cv mat must have a name which fits to the following rules.
The class mat represents an n dimensional dense numerical single channel or multi channel array.
To access multiple channel matrices you can use cv mat elem matrix type i j nchannels channel idx.
Here are the some popular ones.
C abs a is equivalent to absdiff a scalar all 0 c.
The name starts with a lower or upper case character hence a value between a z or a z.
Multiple images vector of mat can be saved in tiff format see the code sample below.
A new matrix of the specified size and specifed type will be allocated.
N dimensional dense array class.
Abs is a meta function that is expanded to one of absdiff or convertscaleabs forms.
C abs a b is equivalent to absdiff a b c.
N dimensional dense array class.
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.
Or use the universal filestorage i o functions to save the image to xml or yaml format.
The class mat represents an n dimensional dense numerical single channel or multi channel array.
Cvmat is now obsolete.
