lcd屏幕怎样设置横屏显示

output_str="[%d]" % (max_blob.cx()) ，这一行代码中的第二个百分号，表示什么意思？

@dktg 我运行的是opmv中的例程

LCD Example

Note: To run this example you will need a LCD Shield for your OpenMV Cam.

The LCD Shield allows you to view your OpenMV Cam's frame buffer on the go.

import sensor, image, lcd

sensor.reset() # Initialize the camera sensor.
sensor.set_pixformat(sensor.RGB565) # or sensor.GRAYSCALE
sensor.set_framesize(sensor.QQVGA2) # Special 128x160 framesize for LCD Shield.
lcd.init() # Initialize the lcd screen.

while(True):
lcd.display(sensor.snapshot()) # Take a picture and display the image.

243行变量名center_x_，是不是多了一个下划线

arduinoUNO串口接受色块数据的例子有吗？

写两个串口通信例子:
1是用openMV写一个发现绿色方块，把方块中心坐标，用串口发给arduino UNO;
2是写一个arduino用串口接受这个坐标的数据的例子。

for blob in img.find_blobs([thresholds[threshold_index]], pixels_threshold=200, area_threshold=200, merge=True):
img.draw_rectangle(blob.rect())
img.draw_cross(blob.cx(), blob.cy())