&lt;title&gt;Sampling effects in CdHgTe focal plane arrays&lt;/title&gt;

Bradley, D. J.; Dennis, Peter

doi:10.1117/12.951965

Cited by 7 publications

(2 citation statements)

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“…The effects of sampling and aliasing can be reduced and the spatial resolution of FPA detector arrays increased through the use of microscan techniques whereby the detector array is displaced by half a detector pitch in the two orthogonal directions and images recorded. 13 Alternatively, higher enhancement can be achieved by using a reticle in an image plane in front of the detector array. 14 A number of images are recorded with the reticle displaced by multiple fractions of the detector pitch.…”

Section: Comparison With the Johnson Criteriamentioning

confidence: 99%

Method of predicting the probability of human observers recognizing targets in simulated thermal images

Fairhurst

1998

Opt. Eng

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A series of psychophysical trials is conducted to study the human perception of images of various shapes that are degraded by various combinations of Gaussian blurring, sampling, and fixed pattern noise. These images were created using computer programs designed to simulate the types of image degradation associated with thermal imagers that employ focal plane arrays (FPAs) of detectors. A total of 46 observers participated in these trials, during which over 130,000 observations were recorded. The responses collected during the trials are used to develop an empirical model of human vision applicable to 2-D images having a gray scale, but not including other colors. This model can be used to predict the probability of a human observer correctly distinguishing between images of two different objects.

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Section: Comparison With the Johnson Criteriamentioning

confidence: 99%

Method of predicting the probability of human observers recognizing targets in simulated thermal images

Fairhurst

1998

Opt. Eng

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“…To address this, the microscanning process takes multiple sample images of the same target, each slightly displaced along a defined axis, to achieve a significantly higher pixel count in the final image. 1 The detector line of sight is displaced half the instantaneous field of view of a pixel in X and Y directions (see Figure 1). We designed a system that integrates microscanning in a Cassegrain IR telescope to produce high-resolution images.…”

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confidence: 99%