Question

Hey peeps am studding opencv and running through some tutorials, i came across these attributes well I think they are that the problem really I dont know what they are tried google it but with no luck:

So these are the bits that i have no idea what they are have a look maybe someone can explain these to me so the tutorials will have more sense to me:

vector<Vec4i>() //I know what vector is :) but Vec4i....?
CV_8UC1 // <------- ?

Answer 1

The OpenCV basic structures page (under the Vec section) explains that Vec4i is a typedef, equivalent to Vec<int, 4>, a vector of 4 integers.

Additionally, on the same page (under the Mat section), it explains that CV_8UC1 is an 8-bit single-channel matrix. Specifically:

• 8 indicates the bit depth
• U indicates that it is unsigned
• C1 indicates that there is a single channel.

Here’s a page with more information about OpenCV naming conventions.