如果让触发控制识别条形码变得稳定?
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请教一下大大,我现在设计一个支架固定了openmv相机,目前是通过串口触发拍摄识别条形码,固定条码测试连续触发10次拍摄10张,同样位置拍摄的固定条码,可能只能识别到7次或者8次。但在实际场景中每次条码经过只触发一次,如何提高识别成功率
循环代码
while(True): #clock.tick() img = sensor.snapshot() codes = img.find_barcodes() for code in codes: img.draw_rectangle(code.rect()) if code.payload() is not None : uart3.write(code.payload()) #print_args = (barcode_name(code), code.payload(), (180 * code.rotation()) / math.pi, code.quality(), clock.fps()) #print("Barcode %s, Payload \"%s\", rotation %f (degrees), quality %d, FPS %f" % print_args) if not codes: print("not codes") else: img = sensor.snapshot()
全代码
import sensor, image, time, math from pyb import UART sensor.reset() sensor.set_pixformat(sensor.GRAYSCALE) sensor.set_framesize(sensor.VGA) # High Res! sensor.set_windowing((640, 80)) # V Res of 80 == less work (40 for 2X the speed). sensor.skip_frames(time = 2000) sensor.set_auto_gain(False) # must turn this off to prevent image washout... #sensor.set_auto_whitebal(False) # must turn this off to prevent image washout... clock = time.clock() uart3 = UART(3, 19200,timeout=1000) uart1 = UART(1, 19200,timeout=1000) # Barcode detection can run at the full 640x480 resolution of your OpenMV Cam's # OV7725 camera module. Barcode detection will also work in RGB565 mode but at # a lower resolution. That said, barcode detection requires a higher resolution # to work well so it should always be run at 640x480 in grayscale... def barcode_name(code): if(code.type() == image.EAN2): return "EAN2" if(code.type() == image.EAN5): return "EAN5" if(code.type() == image.EAN8): return "EAN8" if(code.type() == image.UPCE): return "UPCE" if(code.type() == image.ISBN10): return "ISBN10" if(code.type() == image.UPCA): return "UPCA" if(code.type() == image.EAN13): return "EAN13" if(code.type() == image.ISBN13): return "ISBN13" if(code.type() == image.I25): return "I25" if(code.type() == image.DATABAR): return "DATABAR" if(code.type() == image.DATABAR_EXP): return "DATABAR_EXP" if(code.type() == image.CODABAR): return "CODABAR" if(code.type() == image.CODE39): return "CODE39" if(code.type() == image.PDF417): return "PDF417" if(code.type() == image.CODE93): return "CODE93" if(code.type() == image.CODE128): return "CODE128" while(True): #clock.tick() img = sensor.snapshot() codes = img.find_barcodes() for code in codes: img.draw_rectangle(code.rect()) if code.payload() is not None : uart3.write(code.payload()) #print_args = (barcode_name(code), code.payload(), (180 * code.rotation()) / math.pi, code.quality(), clock.fps()) #print("Barcode %s, Payload \"%s\", rotation %f (degrees), quality %d, FPS %f" % print_args) if not codes: print("not codes") else: img = sensor.snapshot()
由于是流水线作业,条形码停留时间可能就几秒,所以不能一直拍摄等待识别到条形码再去处理,现在的解决方法是每次触发拍摄3张,识别3次,想请教一下有没有更好的方法提高识别率
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就没有检测到就一直检测啊。直到检测到再输出。
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谢谢 突然短路了