A Method of Illumination Equalization of Two-Dimensional Code Image Based on Compressed Sensing
A compressed sensing and two-dimensional code technology, applied in the field of two-dimensional code image recognition, can solve problems such as incomplete illumination unevenness, slow processing speed, complex algorithm, etc., to achieve good application effect, increase speed, and good effect Effect
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[0052] With two unevenly illuminated barcode image sizes of 256*256, refer to figure 1 , the binary recognition processing steps of the two-dimensional barcode image are as follows:
[0053] Step 1: Input a two-dimensional barcode, for example, input two two-dimensional code images, perform grayscale transformation on them and store the data in I1 and I2.
[0054] Step 2: Perform Fourier transform 256*256 on I1 and I2 respectively to obtain their spectrum images X1 and X2.
[0055] Step 3: Set up a sampling matrix, and perform spectral sampling on X1 and X2 in the Fourier domain to Y1 and Y2 respectively.
[0056] Step 4: Perform linear fusion of Y1 and Y2 to obtain a new Fourier spectrum Y;
[0057] Step 5: Use FISTA to perform fast soft-threshold iteration on the spectrum Y to obtain Y', and perform inverse Fourier transform on Y' to obtain the restored image f, and binarize the image to identify the two-dimensional code image.
[0058] After using the present invention t...
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