title: Observations on adaptive vector filters for noise reduction in color images

authors: Cree, Michael J.

subjects: adaptive filters

abstract: In a series of papers, Plataniotis et al. proposed a number of filters for noise reduction in color images where the noise type is unknown. In this letter, those filters with a unified notation are summarized, and it is shown that they are essentially variants of the same filtering procedure. It is also shown that the class of adaptive vector filters can be considered as interpolants between the arithmetic mean filter and the vector median filter. Results are presented of numerical computations with the filters on test images corrupted with noise. It is found that the adaptive vector filters perform well with general applicability.

text: Observations on adaptive vector filters for noise reduction in color images In a series of papers, Plataniotis et al. proposed a number of filters for noise reduction in color images where the noise type is unknown. In this letter, those filters with a unified notation are summarized, and it is shown that they are essentially variants of the same filtering procedure. It is also shown that the class of adaptive vector filters can be considered as interpolants between the arithmetic mean filter and the vector median filter. Results are presented of numerical computations with the filters on test images corrupted with noise. It is found that the adaptive vector filters perform well with general applicability.

year: 2004-02-01

title: Preference in Asynchronous Presentation of Stimuli

authors: Yuan, Chengan

subjects: Self-Control

abstract: A self-control procedure that involved a later onset of a stimulus signalling a
small reinforcer within the waiting time for a larger reinforcer was investigated to
determine a point of shifting preference and a discounting function as the delay
varied. The results from Experiment 1 to Experiment 3 showed exclusive
impulsive choices regardless of the delay. In order to examine if the results were
due to the procedure and the parameters, or the species used, Experiment 4
attempted to obtain shifts in preference using simultaneous onset of stimuli with
the same species. The results demonstrated no changes in preference but an
increase in proportion of self-control choices was shown. Due to the limited
information from the replicated studies, the accounts for the results could not be
concluded. The explanations derived from choice models seemed most plausible,
but limitations of the choice models were discussed.

text: Preference in Asynchronous Presentation of Stimuli A self-control procedure that involved a later onset of a stimulus signalling a
small reinforcer within the waiting time for a larger reinforcer was investigated to
determine a point of shifting preference and a discounting function as the delay
varied. The results from Experiment 1 to Experiment 3 showed exclusive
impulsive choices regardless of the delay. In order to examine if the results were
due to the procedure and the parameters, or the species used, Experiment 4
attempted to obtain shifts in preference using simultaneous onset of stimuli with
the same species. The results demonstrated no changes in preference but an
increase in proportion of self-control choices was shown. Due to the limited
information from the replicated studies, the accounts for the results could not be
concluded. The explanations derived from choice models seemed most plausible,
but limitations of the choice models were discussed.

year: 2009

title: Maori Te Aroha before the opening of the goldfield (mostly through Pakeha eyes)

authors: Hart, Philip

abstract: The various names of the peaks of the mountain and the legends concerning it reflected a violent past. As proof, several pa have been located, both at Te Aroha and at Waiorongomai, and the names of some of the streams indicate the nature and consequences of the battles fought in this contested area.
Ngati Rahiri was subdivided into three hapu: Ngati Tumutumu, Hgati Hue, and Ngati Kopirimau, descendents of these ancestors. In the nineteenth century, when the population was small, Hou was the senior rangatira, with Tutuki being the subordinate rangatira of the plains. A pa (later known as Tui pa) was constructed at Omahu, to the north of the hot springs, which were prized by Maori and increasingly enjoyed by Pakeha. Some of the land was cultivated, though visiting Pakeha considered that settlers could do much more to develop the agricultural potential. Most Ngati Rahiri were regarded as being ‘friendly’, welcoming (and benefiting from) visitors. Elaborate welcoming ceremonies were held for officials and rangatira, and a hotel operated by a rangatira’s son provided basic accommodation. Under Maori auspices the first race day was held in January 1878. 
Also in 1878, negotiators obtained an agreement to make a road to Paeroa, using Maori workers, and as the benefits of such improvements became apparent there was increased willingness to permit the construction of more roads, a bridge, and the snagging of the river, over the objections of a minority. Pakeha disapproved of how money raised through land sales in particular were wasted on extravagant displays of mana, which were not possible after the end of the 1870s because of lack of money, necessitating seeking paid employment. Friendly contact increased steadily, apart from occasional worries prompted by such events as the shooting of Daldy McWilliams, and a football match in May 1880 reportedly revealed ‘the utmost friendly feeling’ existing between Maori and Pakeha.

text: Maori Te Aroha before the opening of the goldfield (mostly through Pakeha eyes) The various names of the peaks of the mountain and the legends concerning it reflected a violent past. As proof, several pa have been located, both at Te Aroha and at Waiorongomai, and the names of some of the streams indicate the nature and consequences of the battles fought in this contested area.
Ngati Rahiri was subdivided into three hapu: Ngati Tumutumu, Hgati Hue, and Ngati Kopirimau, descendents of these ancestors. In the nineteenth century, when the population was small, Hou was the senior rangatira, with Tutuki being the subordinate rangatira of the plains. A pa (later known as Tui pa) was constructed at Omahu, to the north of the hot springs, which were prized by Maori and increasingly enjoyed by Pakeha. Some of the land was cultivated, though visiting Pakeha considered that settlers could do much more to develop the agricultural potential. Most Ngati Rahiri were regarded as being ‘friendly’, welcoming (and benefiting from) visitors. Elaborate welcoming ceremonies were held for officials and rangatira, and a hotel operated by a rangatira’s son provided basic accommodation. Under Maori auspices the first race day was held in January 1878. 
Also in 1878, negotiators obtained an agreement to make a road to Paeroa, using Maori workers, and as the benefits of such improvements became apparent there was increased willingness to permit the construction of more roads, a bridge, and the snagging of the river, over the objections of a minority. Pakeha disapproved of how money raised through land sales in particular were wasted on extravagant displays of mana, which were not possible after the end of the 1870s because of lack of money, necessitating seeking paid employment. Friendly contact increased steadily, apart from occasional worries prompted by such events as the shooting of Daldy McWilliams, and a football match in May 1880 reportedly revealed ‘the utmost friendly feeling’ existing between Maori and Pakeha.

year: 2016