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OpenCV: Difference between revisions
→Resizing an Image
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img = cv2.imread('messi5.jpg') | img = cv2.imread('messi5.jpg') | ||
new_img = cv2.resize(img, (500,200), interpolation = | # Resize to resolution | ||
new_img = cv2.resize(img, (500,200), interpolation=v2.INTER_CUBIC) | |||
# Resize by factor | |||
cv2.resize(img, (0, 0), fx=1/4, fy=1/4, interpolation=cv2.INTER_AREA) | |||
</syntaxhighlight> | </syntaxhighlight> | ||
;Interpolation options | |||
* INTER_NEAREST | |||
* INTER_LINEAR | |||
* INTER_CUBIC | |||
* INTER_AREA | |||
* INTER_LANCZOS4 | |||
For downscaling, use `INTER_AREA` to avoid aliasing. However, `INTER_NEAREST` will give the the optimal speed. | |||
For upscaling, use `INTER_CUBIC` for best results or `INTER_LINEAR` for best performance. | |||
==Video== | ==Video== | ||