initial commit

samples/python/tutorial_code/imgProc/Pyramids/pyramids.py

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