문제의 코드
cv::resize(_output, _output, cv::Size(dst_w, dst_h), cv::INTER_CUBIC);
위와 같이 double fx, double fy 의 인자를 넣지 않고 interpolation 옵션을 주면 안먹는다... (픽셀 값 확인함)
왜지? ....
보통 값 생략 하면 디폴트 값으로 들어가는 것이 아닌가
cv::INTER_CUBIC 의 값이 2로 들어가서 fx 값으로 대치된건가?
...
문제가 해결된 코드
cv::resize(_output, _output, cv::Size(dst_w, dst_h), 0, 0, cv::INTER_CUBIC);
resize¶
Resizes an image.
C++:
void resize(InputArray src, OutputArray dst, Size dsize, double fx=0, double fy=0, int interpolation=INTER_LINEAR )
Python:
cv2.resize(src, dsize[, dst[, fx[, fy[, interpolation]]]]) → dst
Parameters:
- src – input image.
- dst – output image; it has the size dsize (when it is non-zero) or the size computed from src.size(), fx, and fy; the type of dst is the same as of src.
- dsize –
output image size; if it equals zero, it is computed as:
Either dsize or both fx and fy must be non-zero.
- fx –
scale factor along the horizontal axis; when it equals 0, it is computed as
- fy –
scale factor along the vertical axis; when it equals 0, it is computed as
- interpolation –
interpolation method:
- INTER_NEAREST - a nearest-neighbor interpolation
- INTER_LINEAR - a bilinear interpolation (used by default)
- INTER_AREA - resampling using pixel area relation. It may be a preferred method for image decimation, as it gives moire’-free results. But when the image is zoomed, it is similar to the INTER_NEARESTmethod.
- INTER_CUBIC - a bicubic interpolation over 4x4 pixel neighborhood
- INTER_LANCZOS4 - a Lanczos interpolation over 8x8 pixel neighborhood
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