a grating interferometer image acquisition unit configured to acquire a first image with a target resolution and a second image with a target contrast sensitivity from a symmetrical grating interferometer by linearly moving a position of a sample in the interferometer;

a numerical phantom generation unit configured to generate a numerical phantom for performing machine learning;

a convolution layer generation unit configured to perform calculation processing of a convolutional neural network to extract features from input data;

an activation function application calculation unit configured to apply a ReLu (Rectified linear unit) activation function to an output value of the convolution calculation to perform smooth repetitive machine learning;

a CNN (convolutional neural network) repetitive machine learning unit configured to correct a convolution calculation factor while repeatedly performing forward propagation and backward propagation processes; and

an image matching output unit configured to match and provide as output features extracted by repetitive machine learning of the CNN repetitive machine learning unit.