A technique is presented which uses an infrared camera and a computer system to determine the true temperature distribution on close up plane targets, and emittance and transmission distribution can be calculated pixcel by pixcel from multiple IR images in different condition. Four experiments were performed to verify the technique on opaque objects, and the results were in close agreement within 5% error of the infrared camera system. The conditions to achieve this result were: 1) the measurements were made in some rooms with uniform set temperature, 2) one reference image at a uniform temperature distribution, eg. at room temperature in thermal equilibrium condition, is required for each opaque sample, and 3) the references should be the same sample at same location exactly. For transparent material, though the principle is the same, the measurement is much more complicated than the opaque material. One more condition is needed for this measurement, that is, two reference image with uniform set temperature together with uniform and a controllable radiation source behind the sample are required to determine the transmission distribution, emittance distribution and true temperature distribution of transparent samples, in addition to the conditions for opaque objects.