DataMatrix

预备知识

? 什么是DataMatrix

TODO DataMatrix 介绍

? DataMatrix 样本生成

TODO 附图片 / 视频

CODE - DataMatrix识别

# Find Data Matrices Example
#
# This example shows off how easy it is to detect data matrices using the
# OpenMV Cam M7. Data matrices detection does not work on the M4 Camera.

import sensor, image, time, math

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
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()

while(True):
    clock.tick()
    img = sensor.snapshot()
    img.lens_corr(1.8) # strength of 1.8 is good for the 2.8mm lens.

    matrices = img.find_datamatrices()
    for matrix in matrices:
        img.draw_rectangle(matrix.rect(), color = (255, 0, 0))
        print_args = (matrix.rows(), matrix.columns(), matrix.payload(), (180 * matrix.rotation()) / math.pi, clock.fps())
        print("Matrix [%d:%d], Payload \"%s\", rotation %f (degrees), FPS %f" % print_args)
    if not matrices:
        print("FPS %f" % clock.fps())

CODE - DataMatrix识别带放大

# Find Data Matrices w/ Lens Zoom Example
#
# This example shows off how easy it is to detect data matrices using the
# OpenMV Cam M7. Data matrices detection does not work on the M4 Camera.

import sensor, image, time, math

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.VGA)
sensor.set_windowing((320, 240)) # 2x Zoom
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()

while(True):
    clock.tick()
    img = sensor.snapshot()

    matrices = img.find_datamatrices()
    for matrix in matrices:
        img.draw_rectangle(matrix.rect(), color = (255, 0, 0))
        print_args = (matrix.rows(), matrix.columns(), matrix.payload(), (180 * matrix.rotation()) / math.pi, clock.fps())
        print("Matrix [%d:%d], Payload \"%s\", rotation %f (degrees), FPS %f" % print_args)
    if not matrices:
        print("FPS %f" % clock.fps())
Copyright 杭州云江科技有限公司 2017 all right reserved,powered by Gitbook该文件修订时间: 2018-04-02 09:53:12

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