The expression of image quality provided by a detector is called:

The expression of image quality provided by a detector is called:

• A. Modulation Transfer Function
• B. Matrix Size
• C. Signal-to-Noise Ratio
• D. Nyquist Frequency

Answer: (A)

Focus here is on how well a detector preserves image detail across different sizes of patterns. The Modulation Transfer Function is the measure that captures this directly. It describes how much contrast the detector can reproduce at various spatial frequencies, which correspond to the fineness of detail in the image. A detector with a higher MTF maintains more of the original contrast as details get finer, so the image appears sharper. As spatial frequency increases, the MTF typically falls off, indicating the limit where fine details blur. Other terms relate to different aspects of image formation but not this direct transfer of detail. Matrix size affects how many pixels are used to sample the image, not how well the detector transfers contrast. Signal-to-Noise Ratio concerns the level of noise relative to signal, impacting perceived quality but not the intrinsic contrast-transfer performance. Nyquist frequency is about the sampling limit set by pixel size, defining the highest frequency that can be represented, rather than the detector’s actual ability to transfer contrast across frequencies. So the detector’s expression of image quality is described by the Modulation Transfer Function.

Focus here is on how well a detector preserves image detail across different sizes of patterns. The Modulation Transfer Function is the measure that captures this directly. It describes how much contrast the detector can reproduce at various spatial frequencies, which correspond to the fineness of detail in the image. A detector with a higher MTF maintains more of the original contrast as details get finer, so the image appears sharper. As spatial frequency increases, the MTF typically falls off, indicating the limit where fine details blur.

Other terms relate to different aspects of image formation but not this direct transfer of detail. Matrix size affects how many pixels are used to sample the image, not how well the detector transfers contrast. Signal-to-Noise Ratio concerns the level of noise relative to signal, impacting perceived quality but not the intrinsic contrast-transfer performance. Nyquist frequency is about the sampling limit set by pixel size, defining the highest frequency that can be represented, rather than the detector’s actual ability to transfer contrast across frequencies.

So the detector’s expression of image quality is described by the Modulation Transfer Function.