Methods and means for processing images

A method of converting an image of an object data and transmitting the data, comprising:

• setting a plurality of photosensitive cells along a multiplicity of rows and columns of a random access memory to a given value;
• exposing the plurality of cells of the random access memory to an image so the cells change to exposure values on the basis of exposures of the cells;
• in sequence from row to row, simultaneously reading the cells along each row and, on the basis of the reading, writing refresh values representative of the exposure values back into the read cells;
• repeating the row to row reading and writing of refresh values cyclically, and
• sequentially transmitting the refresh value in each cell;
• the step of writing refresh values representative of the exposure values into the read cells including writing the refresh values into all the cells in a row for each transmission of the refresh value in one cell so that all the cells in each row are refreshed each time a single cell is transmitted;
• the step of exposing the plurality of cells of the random access memory to an image includes forming an image of the entire object on the random access memory.