1. An image processing apparatus comprising: image quality control instructing means which receives instruction information for the enhancement of qualitative effect on feeling (Q-effect) of input image data; image data recognizing means which classifies the image data into image data of a texture stuff which has texture, image data of a black stuff which does not have texture and is virtually monochromatic, and image data of colored stuff which does not have texture and is chromatic; process operator characteristics holding means which holds an image process operator for enhancement of sharpness, an image process operator for the emphasis of contrast or edge, and an image process operator for the emphasis of color of the subject picture in correspondence to image data of texture stuff, black stuff and colored stuff, respectively; image process operator determining means which makes reference to said process operator characteristics holding means in accordance with the instruction information provided by said image quality control instructing means to select an image process operator for the result of classification provided by said image data recognizing means; and image processing means which applies the image process operator selected by said image process operator determining means to said subject picture.