Test paper reflectometer and test paper surface measuring method

Test paper reflectometer and test paper surface measuring method

  • CN 105,548,165 B
  • Filed: 12/29/2015
  • Issued: 01/08/2021
  • Est. Priority Date: 12/29/2015
  • Status: Active Grant
First Claim
Patent Images

1. A test paper surface measurement method is characterized in that:

  • the image obtained by the gray camera is subjected to photoelectric conversion, the number of cells of each gray value is obtained by scanning the grid gray value, and the areas of different gray value areas can be calculated according to the areas of the cells on the test paper;

    the gray value is determined by a gray-density relationship, by obtaining distribution curves of different gray unit cell numbers, the gray value with the most unit cell number is the gray value under the density, and the calculation formula of the density is as follows;

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