Diferencias

Muestra las diferencias entre dos versiones de la página.

--- wiki2:opencv [2015/10/17 12:48]
alfred [Obtain ROI]
+++ wiki2:opencv [2020/05/09 09:25] (actual)
@@ Línea 51: / Línea 51: @@
  }
 </code>
+===== Basic with images =====
-===== Video Capture =====
-You can capture images and obtain the properties:
-<code python>
-cap = cv2.VideoCapture(0)
-width, height = cap.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH), cap.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT)
-</code>
-VideoCapture properties in C++ are: CV_CAP_PROP_FRAME_WIDTH...
-===== Others =====
 ==== Create black image ====
 <code python>
@@ Línea 76: / Línea 67: @@
 black_image[:height, :width] = frame[:,:]
 </code>
+==== Obtain the average color ====
+<code python>
+color = np.mean(m_roi, axis=0)
+</code>
+==== Draw figures ====
+<code python>
+cv2.rectangle(black_image, (pos_x, pos_y), (pos_x + size_x, pos_y + size_y), (255, 255, 255))
+</code>
+===== Video Capture =====
+You can capture images and obtain the properties:
+<code python>
+cap = cv2.VideoCapture(0)
+width, height = cap.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH), cap.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT)
+</code>
+VideoCapture properties in C++ are: CV_CAP_PROP_FRAME_WIDTH...
+===== Others =====
+==== Get a sample of colors ====
+<code python>
+idx_x = np.random.randint(colorset.shape[0], size=_size)
+idx_y = np.random.randint(colorset.shape[1], size=_size)
+sample = colorset[idx_y, idx_x, :]
+</code>
+==== Change the shape of a num.array ====
+Use ''reshape''.

Programming