Uses the evaluation method and this evaluation method of the color picture signal the color picture signal evaluation device

摘要

PURPOSE:To automate decision and to enable inspection sigh high reliability by extracting the average saturation of each local block while changing a size, cumulatively adding the maximum value of this extracted average saturation and comparing the maximum value with a quality deciding reference. CONSTITUTION:A saturation data converting means 20 is provided to generate saturation picture data from color picture data, and a calculation part 40 is provided to divide the saturation picture data into the fine local blocks and to select the maximum value of the average saturation in each local block. Then, a storing means 30S is provided to store th maximum value of the average saturation selected by this calculation part 40. Further, a control means is provided to change the number of picture elements constituting the local block, to calculate the average saturation and to execute control for repeating the change of the picture element number, and an adding means 50 is provided to calculate the sum of the maximum values obtained from the calculation part 40 each time the number of the picture elements is changed. Then, a deciding means is provided to decide whether this added value is more than a prescribed value or not so as to decide the presence and absence of color nonuniformity. Thus, the color picture signal obtained from a color image pickup element, etc., is automatically evaluated and labor is saved.