image_w 从jpg格式保存为obj格式
def execute(change):
image = change['new']
#print("-", image.shape[0], image.shape[1], image.shape[2])
data = preprocess(image)
#print(data.shape[0], data.shape[1], data.shape[2])
cmap, paf = model_trt(data)
cmap, paf = cmap.detach().cpu(), paf.detach().cpu()
counts, objects, peaks = parse_objects(cmap, paf)#, cmap_threshold=0.15, link_threshold=0.15)
draw_objects(image, counts, objects, peaks)
image_w.value = bgr8_to_jpeg(image[:, ::-1, :])