!9202 Fix openpose network eval bug

From: @zhanghuiyao
Reviewed-by: @c_34,@oacjiewen
Signed-off-by: @c_34

model_zoo/official/cv/openpose/eval.py

@@ -211,7 +211,7 @@ def compute_connections(pafs, all_peaks, img_len, cfg):
         cand_a = all_peaks[all_peaks[:, 0] == limb_point[0]][:, 1:]
         cand_b = all_peaks[all_peaks[:, 0] == limb_point[1]][:, 1:]
 
-        if cand_a and cand_b:
+        if cand_a.shape[0] > 0 and cand_b.shape[0] > 0:
             candidate_connections = compute_candidate_connections(paf, cand_a, cand_b, img_len, cfg)
 
             connections = np.zeros((0, 3))
@@ -346,7 +346,7 @@ def detect(img, network):
             cv2.imwrite(save_path, heatmaps[i]*255)
 
     all_peaks = compute_peaks_from_heatmaps(heatmaps)
-    if not all_peaks:
+    if all_peaks.shape[0] == 0:
         return np.empty((0, len(JointType), 3)), np.empty(0)
     all_connections = compute_connections(pafs, all_peaks, map_w, params)
     subsets = grouping_key_points(all_connections, all_peaks, params)
@@ -359,7 +359,7 @@ def detect(img, network):
 
 def draw_person_pose(orig_img, poses):
     orig_img = cv2.cvtColor(orig_img, cv2.COLOR_BGR2RGB)
-    if not poses:
+    if poses.shape[0] == 0:
         return orig_img
 
     limb_colors = [
@@ -426,7 +426,7 @@ def _eval():
         img_id = int((img_id.asnumpy())[0])
         poses, scores = detect(img, network)
 
-        if poses:
+        if poses.shape[0] > 0:
             #print("got poses")
             for index, pose in enumerate(poses):
                 data = dict()