Method and system of controlling a quality measure

(canceled)

(canceled)

A computerized method of controlling a quality measure in a compression quality evaluation system, the method comprising:

• calculating a gradient value indicative of an extent of gradual spatial changes of an input image;
• and
• configuring the quality measure upon a gradient criterion being met by said gradient value, the quality measure being indicative of perceptual quality of a compressed image compressed from the input image.

A computerized method of controlling a quality measure in a compression quality evaluation system based on an input image pair including an input image and a corresponding compressed image compressed from the input image, the method comprising:

• calculating a difference value indicative of an extent of difference between the compressed image and the input image;
• and
• configuring the quality measure upon a chroma artifact criterion being met by said difference value, the quality measure being indicative of perceptual quality of the compressed image.

A computerized system of controlling a quality measure in a compression quality evaluation system, the system comprising a processor configured to:

• calculate a smoothness value indicative of an extent of smoothness of an input image, wherein said calculating is based on at least a portion of the input image and comprises excluding an area of the at least a portion of the input image from the calculation of the smoothness value upon a condition being met;
• and
• configure the quality measure upon a smoothness criterion being met by said smoothness value, the quality measure being indicative of perceptual quality of a compressed image compressed from the input image.

A computerized system of controlling a quality measure in a compression quality evaluation system, the system comprising a processor configured to:

• calculate a gradient value indicative of an extent of gradual spatial changes of an input image;
• and
• configure the quality measure upon a gradient criterion being met by said gradient value, the quality measure being indicative of perceptual quality of a compressed image compressed from the input image.

A computerized system of controlling a quality measure in a compression quality evaluation system based on an input image pair including an input image and a corresponding compressed image compressed from the input image, the system comprising a processor configured to:

• calculate a difference value indicative of an extent of difference between the compressed image and the input image;
• and
• configure the quality measure upon a chroma artifact criterion being met by said difference value, the quality measure being indicative of perceptual quality of the compressed image.

A non-transitory computer readable storage medium tangibly embodying a program of instructions executable by a machine to control a quality measure in a compression quality evaluation system, comprising the steps of the following:

• calculating a smoothness value indicative of an extent of smoothness of an input image, wherein said calculating is based on at least a portion of the input image and comprises excluding an area of the at least a portion of the input image from the calculation of the smoothness value upon a condition being met;
• and
• configuring the quality measure upon a smoothness criterion being met by said smoothness value, the quality measure being indicative of perceptual quality of a compressed image compressed from the input image.

A non-transitory computer readable storage medium tangibly embodying a program of instructions executable by a machine to control a quality measure in a compression quality evaluation system, comprising the steps of the following:

• calculating a gradient value indicative of an extent of gradual spatial changes of an input image;
• and
• configuring the quality measure upon a gradient criterion being met by said gradient value, the quality measure being indicative of perceptual quality of a compressed image compressed from the input image.

A non-transitory computer readable storage medium tangibly embodying a program of instructions executable by a machine to control a quality measure in a compression quality evaluation system based on an input image pair including an input image and a corresponding compressed image compressed from the input image, comprising the steps of the following:

• calculating a difference value indicative of an extent of difference between the compressed image and the input image;
• and
• configuring the quality measure upon a chroma artifact criterion being met by said difference value, the quality measure being indicative of perceptual quality of the compressed image.