Thank you for a helpful answer. Cv8uc1 means 8 bit single channel matrix cv32fc2 means 2 channel ie.
Opencv Cv Mat Class Reference
Cv mat check type. So cv8uc3 16 but you arent supposed to use this number just check type cv8uc3 if you need to know what type an internal opencv array is. I am having an mat structure which size is 382 x 510 x 32. From what i have read on the internet it should be something like this. Unsigned char input unsigned charimgdata. How can i access the data from it. Mattype returns the type of a matrix element.
I came looking for what was the meaning of the 5 i was getting with cvmattype so you gave me the answer with your question. Cvmattype so you can do something like this. If matrix is of type cv16u then use matatushortyx. Int mattype const the method returns a matrix element type. Post 330 this default implementation was removed by an ifdef on opencv. Cvmattypetmp2 type that is going to return the 5 you need which is equivalent to the cv32fc1.
The most common types are. A new matrix of the specified size and specifed type will be allocated. If matrix is of type cv8s then use matatscharyx. To get depth and chans you could use the macros cvmatdepthtype and cvmatcntype respectively. Conversion from cvmat to non scalar type iplimage aka iplimage requested 1997 open xrngx opened this issue jan 17 2020 5 comments. Note that cvmatattpint y int x and cvmattpoperator int y int x do absolutely the same thing and run at the same speed but the latter is certainly shorter.
Remember opencv will convert the jpeg into bgr. Complex floating point matrix etc. While cvmat is sufficient in most cases cvmat can be more convenient if you use a lot of element access operations and if you know matrix type at compile time. Type has the same meaning as in cvcreatemat function eg. Using cvmatcreatenrows ncols type method or the similar constructor cvmatmatnrows ncols type fillvalue constructor. It makes sense to check whether all the inputoutput arrays are continuous namely have no gaps at the end of each row.
Cv32fc1 for 32 bit floating point 1 channel grayscale images. Cv8uc1 for 8 bit 1 channel grayscale images. I have the same issue wherecvmatstduint32t is not implemented. If yes process them as a long single row. To access pixel values in an opencv cvmat object you first have to know the type of your matrix. Cv8uc3 for 8 bit 3 channel color images.
Cv32fc3 for 32 bit floating point 3 channel color images. In 320 the non specialized definition of cvdatatypestduint32t works out to cvusrtype1 and just happens to allocate 4 bytes for each element. This is an identifier compatible with the cvmat type system like cv16sc3 or 16 bit signed 3 channel array and so on. Can you help me to go through the position of my 3d array. Anyhow my code is something like this. The default setting with cvimread will.
However it works with opencv 320 on windows x86 using gcc 71.
Gallery of Cv Mat Check Type
