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Open Source Computer Vision Library
https://opencv.org/
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51 lines
1.2 KiB
51 lines
1.2 KiB
import sys |
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import cv2 as cv |
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def main(argv): |
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print(""" |
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Zoom In-Out demo |
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------------------ |
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* [i] -> Zoom [i]n |
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* [o] -> Zoom [o]ut |
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* [ESC] -> Close program |
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""") |
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## [load] |
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filename = argv[0] if len(argv) > 0 else 'chicky_512.png' |
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# Load the image |
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src = cv.imread(cv.samples.findFile(filename)) |
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# Check if image is loaded fine |
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if src is None: |
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print ('Error opening image!') |
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print ('Usage: pyramids.py [image_name -- default ../data/chicky_512.png] \n') |
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return -1 |
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## [load] |
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## [loop] |
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while 1: |
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rows, cols, _channels = map(int, src.shape) |
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## [show_image] |
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cv.imshow('Pyramids Demo', src) |
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## [show_image] |
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k = cv.waitKey(0) |
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if k == 27: |
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break |
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## [pyrup] |
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elif chr(k) == 'i': |
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src = cv.pyrUp(src, dstsize=(2 * cols, 2 * rows)) |
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print ('** Zoom In: Image x 2') |
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## [pyrup] |
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## [pyrdown] |
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elif chr(k) == 'o': |
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src = cv.pyrDown(src, dstsize=(cols // 2, rows // 2)) |
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print ('** Zoom Out: Image / 2') |
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## [pyrdown] |
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## [loop] |
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cv.destroyAllWindows() |
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return 0 |
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if __name__ == "__main__": |
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main(sys.argv[1:])
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