The concept of black-and-white visual cryptography with two truly random shares, previously applied to color images, was improved by mixing the contents of the segments of each coding image and by randomly changing a specified number of black pixels into color ones. This was done in such a way that the changes of the contents of the decoded image were as small as possible. These modifications made the numbers of color pixels in the shares close to balanced, which potentially made it possible for the shares to be truly random. The true randomness was understood as that the data pass the suitably designed randomness tests. The randomness of the shares was tested with the NIST randomness tests. Part of the tests passed successfully, while some failed. The target of coding a color image in truly random shares was approached, but not yet reached. In visual cryptography, the decoding with the unarmed human eye is of primary importance, but besides this, simple numerical processing of the decoded image makes it possible to greatly improve the quality of the reconstructed image, so that it becomes close to that of the dithered original image.

以前应用于彩色图像的具有两个真正随机共享的黑白视觉密码学的概念通过混合每个编码图像的段的内容并将指定数量的黑色像素随机更改为彩色像素而得到改进。这样做的方式是使解码图像的内容变化尽可能小。这些修改使共享中的彩色像素数量接近平衡，这可能使共享真正随机成为可能。真正的随机性被理解为数据通过了适当设计的随机性测试。股票的随机性通过 NIST 随机性测试进行了测试。部分测试成功通过，而部分测试失败。以真正随机的份额编码彩色图像的目标已经接近，但尚未实现。