openmv的图传模块可以传到电脑上吗，传输距离有多远
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krfa 发布的帖子
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为什么用32给openmv发送数据'A'，接收到的很多数据是255而不是65发布在 OpenMV Cam
import sensor, image, time, math,json from pyb import LED from pyb import UART import ustruct thresholds = [(11, 56, 16, 59, -8, 44),#red (22, 50, -3, 14, 11, 36), (13, 43, -4, 29, -89, -21)]#blue objthresholds = [(34, 42, 26, 54, 5, 25), # generic_red_thresholds (56, 67, -39, -17, 12, 37), # generic_green_thresholds (29, 45, 0, 14, -32, -15)] # generic_blue_thresholds graythreshold=[(100,255)] sensor.reset() sensor.set_pixformat(sensor.RGB565) sensor.set_framesize(sensor.QVGA) sensor.skip_frames(time = 2000) sensor.set_auto_gain(False) sensor.set_auto_whitebal(False) clock = time.clock() uart = UART(3, 115200) uart.init(115200, bits=8, parity=None, stop=1) uart1 = UART(1, 115200, timeout_char=1000) uart1.init(115200, bits=8, parity=None, stop=1,timeout_char=1000) A=0 red_cx = 0 green_cx = 0 blue_cx = 0 a = 0 led = LED(1) led1 = LED(2) led2 = LED(3) led3 = LED(4) def sending_data(cx,cy): global uart; #frame=[0x2C,18,cx%0xff,int(cx/0xff),cy%0xff,int(cy/0xff),0x5B]; #data = bytearray(frame) data = ustruct.pack("<bbhhb", 0x2C, 0x12, int(cx), int(cy), 0x5B) uart.write(data) # 比较两个色块大小的函数 def compareBlob(blob1, blob2): # 这里我们选择了pixels作为指标比对二者的代码 # 你也可以换用其它指标 例如 blob.area() tmp = blob1.pixels() - blob2.pixels() if tmp == 0: return 0; elif tmp > 0: return 1; else: return -1; while (True): led.on() if(uart1.any()): a = uart1.readchar() if(a==65): #A A=1 led1.on() if(a==66): #B A=0 if(a==67): #C A=2 led.on() if(a==68): #D A=3 led1.on() if(a==69): #E A=4 led2.on() print(a) print('A = %d'%A) if(A==1): led1.on() led.off() clock.tick() img = sensor.snapshot() for blob in img.find_blobs([thresholds[0]], pixels_threshold=500, area_threshold=500, merge=True): img.draw_rectangle(blob[0:4]) img.draw_cross(blob.cx(), blob.cy()) red_cx = blob.cx() for blob in img.find_blobs([thresholds[1]], pixels_threshold=500, area_threshold=500, merge=True): img.draw_rectangle(blob[0:4]) img.draw_cross(blob.cx(), blob.cy()) green_cx = blob.cx() for blob in img.find_blobs([thresholds[2]],pixels_threshold=500, area_threshold=500, merge=True): img.draw_rectangle(blob[0:4]) img.draw_cross(blob.cx(), blob.cy()) blue_cx = blob.cx() if red_cx > green_cx and green_cx > blue_cx : output_str='r123' print(output_str) uart.write(output_str) time.sleep(4) if red_cx > blue_cx and blue_cx > green_cx : output_str='r132' print(output_str) uart.write(output_str) time.sleep(4) if green_cx > blue_cx and blue_cx > red_cx : output_str='r231' print(output_str) uart.write(output_str) time.sleep(4) if green_cx > red_cx and red_cx > blue_cx : output_str='r213' print(output_str) uart.write(output_str) time.sleep(4) if blue_cx > green_cx and green_cx > red_cx : output_str='r321' print(output_str) uart.write(output_str) time.sleep(4) if blue_cx > red_cx and red_cx > green_cx : output_str='r312' print(output_str) uart.write(output_str) time.sleep(4) if(A==2 ): clock.tick() img = sensor.snapshot().lens_corr(1.8) img.binary([objthresholds[0]]) img.dilate(4) blobs=img.find_blobs(graythreshold, pixels_threshold=2025, area_threshold=1600, merge=True) if len(blobs): bigBlob = blobs[0] for blob in blobs: if compareBlob(bigBlob, blob) == -1: bigBlob = blob img.draw_rectangle(bigBlob.rect()) print(bigBlob.cx(),bigBlob.cy()) sending_data(bigBlob.cx(),bigBlob.cy()) time.sleep(4) if(A==3 ): clock.tick() img = sensor.snapshot().lens_corr(1.8) img.binary([objthresholds[1]]) img.dilate(4) blobs=img.find_blobs(graythreshold, pixels_threshold=2025, area_threshold=1600, merge=True) if len(blobs): bigBlob = blobs[0] for blob in blobs: if compareBlob(bigBlob, blob) == -1: bigBlob = blob img.draw_rectangle(bigBlob.rect()) print(bigBlob.cx(), bigBlob.cy()) sending_data(bigBlob.cx(),bigBlob.cy()) time.sleep(4) if(A==4 ): clock.tick() img = sensor.snapshot().lens_corr(1.8) img.binary([objthresholds[2]]) img.dilate(4) blobs=img.find_blobs(graythreshold, pixels_threshold=900, area_threshold=900, merge=True) if len(blobs): bigBlob = blobs[0] for blob in blobs: if compareBlob(bigBlob, blob) == -1: bigBlob = blob img.draw_rectangle(bigBlob.rect()) print(bigBlob.cx(), bigBlob.cy()) sending_data(bigBlob.cx(),bigBlob.cy()) time.sleep(4) -
openmv接受字符串时，为啥会报错发布在 OpenMV Cam
import sensor, image, time, math from pyb import UART import json import ustruct uart = UART(1,115200) uart.init(115200, bits=8, parity=None, stop=1) thresholdss = (4, 15, 4, 28, 1, 19) thresholds = [(12, 50, 30, 79, 12, 127), # generic_red_thresholds (4, 94, -87, -20, -28, 27), # generic_green_thresholds (21, 54, -37, 51, -87, -13)] # generic_blue_thresholds sensor.reset() sensor.set_pixformat(sensor.RGB565) sensor.set_framesize(sensor.QQVGA) sensor.skip_frames(time = 2000) sensor.set_auto_gain(False) sensor.set_auto_whitebal(False) clock = time.clock() b=0 red_cx = 1 #必须要定义，否则会有语法错误 green_cx = 2 blue_cx = 24 def sending_data(cx,cy): global uart; data = ustruct.pack("<bbhhb", 0x2C, 0x12, int(cx), int(cy), 0x5B) uart.write(data); def find_max(circles): max_size=0 for circle in circles: if circle.magnitude() > max_size: max_circle=circle max_size = circle.magnitude() return max_circle while(True): if uart.any (): a=uart.readline().decode() b=int(a) print(a) if(b==1): clock.tick() img = sensor.snapshot() for blob in img.find_blobs([thresholdss], merge=True, pixels_threshold=200, area_threshold=200, merge=True): ratio = blob.w() / blob.h() if (ratio >= 0.5) and (ratio <= 1.5): img.draw_rectangle(blob.rect()) img.draw_cross(blob.cx(), blob.cy()) sending_data(blob.cx(), blob.cy()); if(b==0): clock.tick() img = sensor.snapshot() for blob in img.find_blobs([thresholds[0]], pixels_threshold=200, area_threshold=200, merge=True): img.draw_rectangle(blob.rect()) img.draw_cross(blob.cx(), blob.cy()) red_cx = blob.cx() for blob in img.find_blobs([thresholds[1]], pixels_threshold=200, area_threshold=200, merge=True): img.draw_rectangle(blob.rect()) img.draw_cross(blob.cx(), blob.cy()) green_cx = blob.cx() for blob in img.find_blobs([thresholds[2]], pixels_threshold=200, area_threshold=200, merge=True): img.draw_rectangle(blob.rect()) img.draw_cross(blob.cx(), blob.cy()) blue_cx = blob.cx() if red_cx > green_cx and green_cx > blue_cx : print("123") uart.write("a\r\n") elif red_cx > blue_cx and blue_cx > green_cx : print("132") uart.write("b\r\n") elif green_cx > blue_cx and blue_cx > red_cx : print("231") uart.write("c\r\n") elif green_cx > red_cx and red_cx > blue_cx : print("213") uart.write("d\r\n") elif blue_cx > green_cx and green_cx > red_cx : print("321") uart.write("e\r\n") elif blue_cx > red_cx and red_cx > green_cx : print("312") uart.write("f\r\n")