WarpAffine

[AlOa]

Hi,
I have some problems with image affine transformation.
I load an image RGB image with cv::imread and convert to ncnn::Mat with ncnn::Mat::from_pixels. Then I calculate an affine transformation between to set of points ( I check the transformation with opencv an gives the same affine transformation ). The I try to apply the transformation with warpaffine_bilinear_c3, but the resulting matrix has floating point values, with negative values and some very large value.
Thanks
Alberto

[nihui]

warpaffine_bilinear_c3 need pixel buffer of uchar type, but from_pixels always convert pixels to float type
so, apply warpaffine before converting to Mat

[AlOa]

Now it works, thanks
Alberto