Results 21 to 30 of about 70 (69)

Learning Discriminant Face Descriptor

IEEE Transactions on Pattern Analysis and Machine Intelligence, 2014
Local feature descriptor is an important module for face recognition and those like Gabor and local binary patterns (LBP) have proven effective face descriptors. Traditionally, the form of such local descriptors is predefined in a handcrafted way. In this paper, we propose a method to learn a discriminant face descriptor (DFD) in a data-driven way. The
Zhen Lei 0001, Matti Pietikäinen, Stan Z. Li   +2 more
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Discrimination Learning and Inhibition

Science, 1966
Pigeons learned to discriminate between a white vertical line on a dark background (S+) and a monochromatic circle of light (S—) either with or without responses to S— (errors). Gradients of inhibition, which were centered around S—, and which had greater than zero slopes, were obtained only from those subjects who learned to discriminate with errors ...
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Note on Pitch Discrimination Learning

Perceptual and Motor Skills, 1968
Miller (1956) has suggested that the number of stimuli which can be identified in an "absolute" discrimination task is 7-1 2, about 2.8 bits of transmitted information. Considering the abiliry of the human operator to handle very large amounts of stimulus information, under optimum conditions one might intuitively expect absolute discrimination to ...
M A, Vianello, S H, Evans
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Brightness Discrimination Learning in Caimans

Perceptual and Motor Skills, 1970
Caimans were trained to escape shock in a T-maze with either brightness cues or confounded brightness and spatial cues relevant. After criterion was reached on the confounded problem, the positions of the brightness cues were then varied for these Ss with position becoming an irrelevant cue and the color of the positive cue unchanged.
J T, Williams, S G, Robertson
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Discrimination Learning Set in Children

1964
Publisher Summary This chapter reviews part of the literature on discrimination learning set. It is limited to one general topic-the nature of learning set-and one research topic— “response shift”—which is theoretically important and has received considerable attention in the research literature.
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Discrimination Pretraining and Sound Learning

Perceptual and Motor Skills, 1965
Sound production learning as a function of sound discrimination learning was investigated. First grade Ss who were observed to utter /skrə'b/ for /srə'b/ were assigned to two discrimination pretraining groups ( N = 15 in each group): Group A, discrimination training on /skrə'b/-/srə'b/ and Group B, discrimination training on /sliyp/-/∫liyp/.
H, WINITZ, L, PREISLER
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Discrimination reversal learning in the crayfish

Animal Behaviour, 1967
Summary Nine crayfish failed to show progressive improvement in learning over nine reversals in a two-choice spatial discrimination problem involving a non-correction procedure of training. The results are discussed in their relationship to the habit reversal data on other species.
P J, Capretta, R, Rea
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The effects of physostigmine on discrimination learning

Psychopharmacologia, 1966
Two different discrimination learning experiments, the first using rats and the second cats, provide clear support for facilitation of acquisition rate by physostigmine injections. The results suggest that facilitating effects of physostigmine may be limited to a small dose range (.025–.075 mg/kg), although such facilitatory effects may be limited to ...
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Perceptual Learning in Maze Discriminations

The Quarterly Journal of Experimental Psychology Section B, 1991
In Experiment 1, rats were trained on a discrimination between rubber- and sandpaper-covered arms of a maze after one group had been pre-exposed to these intra-maze cues. Pre-exposure facilitated subsequent discrimination learning, unless the discrimination was made easier by adding further discriminative stimuli, when it now significantly retarded ...
J B, Trobalon, J, Sansa, V D, Chamizo, N J, Mackintosh   +3 more
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Reinforcer Acquisition in Discrimination Learning

Psychological Reports, 1966
This experiment extended an earlier study in which a buzzer sound was combined in pretraining with “Right” or “Wrong.” A two-choice discrimination learning task was presented immediately following the pretraining. Children learned that the buzz had meaning (in a direction opposite the verbal statement with which it was combined).
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