适用于Android的OpenCV中的矩阵乘法

Question

I'm new to OpenCV and android. I'm trying to convert an OpenCV C++ code into java. But I'm stuck in these points. I don't know how to do these operations to Mat Objects. Please help me. Thank you in advance.

first part-

Mat im1;
im1 = cmyk[3].mul(1 - cmyk[1]) > 0.25;

( cmyk is a List<Mat> object in my java code)

second part-

im3 = ((255 - im3) & im2) > 200;

(im3,im2,im1 all are Mat objects)

Answer 1

The Matrix operations (add, mult, etc.) in OpenCV are in the core.Core class.

To multiply two matrices together

Core.multiply(mat1,mat2,resultMat)