Image fidelity criteria

Image fidelity criteria are an important term in a vision system. This criterion plays an important role in the measurement of image quality. Assessment of rating performance of processing technique employed can also be done by this criterion. Both subjective and quantitative approaches can be used here. Subjective criteria employ rating scales like goodness scales and impairment scales. In goodness scale, image quality rate ranges from excellent to unsatisfactory. Here for the calibration of image quality, we require a training set of images. Impairment scale compares your image with an ideal image. This scale is used in image coding. Bubble sort method is also used in rating images. The mean square criterion comes in the quantitative criterion group. This refers to some sort of average of squares of the error between two images.