STUDY OF GLASS TRANSITION TEMPERATURE OF PMMA AND CdS-PMMA COMPOSITE

An image processing apparatus that converts multi-level pixel data to binary pixel data and outputs it includes, in one embodiment, an input device for accepting multi-level pixel data, a binary conversion device for converting multi-level pixel data input from the input device to binary pixel data on the basis of a threshold value, an output device for outputting the binary pixel data which has been binarized by the binary conversion device, a first and a second memory in which errors and binary pixel data are stored, respectively, a correction device for correcting multi-level pixel data, a first and a second average density computation device for computing an average density value, a computation device for computing the average value of the average density values computed by the first and second average density computation devices as a threshold value, a detection device for detecting an error value, and a distribution device for distributing an error value to unbinarized pixel positions.