Patent ID: 8625919
Filing Date: 2014-01-07
Classification: G06T

Abstract:
1. A method of recording images and data for retrieving said images, each of said images assuming the form of a two-dimensional array of rows and columns of pixels, wherein to develop and record the retrieval data, the image is divided into blocks of pixels, each block comprising pixels of at least two rows and two columns, retrieval data is calculated for each block from at least the image data contained in the pixels of that block, and said retrieval data of the block is recorded in the form of at least one pixel having a value as a function of said retrieval data, wherein the image and the retrieval data are recorded on first and second areas of a recording medium, respectively, said areas being arranged in a predetermined relative position relationship, and wherein, to calculate the retrieval data, the convolution integral of the values of the pixels of each block is done with a filtering operator, the extremum is calculated by block, and the retrieval data thus calculated is recorded on the second area in a homologous position of the corresponding block of pixels of the image recorded on the first area.