DEVICE FOR CORRECTING CONTRAST

PURPOSE:To obtain a recorded/reproduced picture with good contrast where the ratio of white to black density in an original picture is constant and the white and black densities are decided by correcting a picture element voltage value based on a maximum and a minimum holding picture element voltages in picture element voltages. CONSTITUTION:A picture element voltage (a) from a CCD1 is A/D-converted 2 into a voltage A and supplied to an average value circuit 4 and a voltage correcting circuit 9 via a gate 3. Sequentially preceding averaged picture element voltage and stored picture element voltage W from the circuit 4 are compared 5 and the averaged picture element voltage M of a picture element group generating the highest voltage is stored in a storage circuit 6 as the voltage W. Further, the voltage M and the stored picture element voltage B are compared 7 and the voltage M of a picture element group generating the lowest voltage is stored in a storage circuit 8 as the voltage B. The correcting circuit 9 corrects the voltage A based on the voltages W and B. Further, a coded picture signal D thus obtained is D/A-converted 10 and supplied to a picture transmitting circuit.