Research on underwater image enhancement algorithm based on improved DCP

All for underwater images, there are some drawbacks, such as low definition, serious color bias, dark brightness, etc. On the basis of in-depth analysis of common image enhancement algorithms, This paper uses the improved dark channel priority algorithm to enhance the underwater image, Improving the contrast of underwater images and color correction of underwater images. Color correction is added based on dark channel prior algorithm; Make the image look more even, higher contrast, more acceptable. The improved algorithm model has a higher transfer rate; PSNR is more balanced and has better contrast to meet the requirements of underwater image observation.

An Automatic Shadow Compensation Method via a New Model Combined Wallis Filter with LCC Model in High Resolution Remote Sensing Images

Current automatic shadow compensation methods often suffer because their contrast improvement processes are not self-adaptive and, consequently, the results they produce do not adequately represent the real objects. The study presented in this paper designed a new automatic shadow compensation framework based on improvements to the Wallis principle, which included an intensity coefficient and a stretching coefficient to enhance contrast and brightness more efficiently. An automatic parameter calculation strategy also is a part of this framework, which is based on searching for and matching similar feature points around shadow boundaries. Finally, a final compensation combination strategy combines the regional compensation with the local window compensation of the pixels in each shadow to improve the shaded information in a balanced way. All these strategies in our method work together to provide a better measurement for customizing suitable compensation depending on the condition of each region and pixel. The intensity component I also is automatically strengthened through the customized compensation model. Color correction is executed in a way that avoids the color bias caused by over-compensated component values, thereby better reflecting shaded information. Images with clouds shadows and ground objects shadows were utilized to test our method and six other state-of-the-art methods. The comparison results indicate that our method compensated for shaded information more effectively, accurately, and evenly than the other methods for customizing suitable models for each shadow and pixel with reasonable time-cost. Its brightness, contrast, and object color in shaded areas were approximately equalized with non-shaded regions to present a shadow-free image.

African Americans: Colorism in Morrow v. IRS Litigation

Walker v. Secretary of Treasury, IRS (Internal Revenue Service) served as a landmark case in shaping the legal context of color-based discrimination in the workplace. As the first case of colorism between Black Americans heard at the federal level, the Walker decision broadened the scope of Title VII of the 1964 Civil Rights Act, treating race and color as two distinctive categories and protected classes. Beyond the legal significance of the ruling, Walker v. IRS carried important social and cultural implications that exposed the continuing significance of colorism in the post–Civil Rights Era. This article deals with an overview of the Walker v. IRS lawsuit, including a discussion of the overall impact of the ruling on the interpretation of Title VII and the inclusion of color(ism) in the application of the Civil Rights Act of 1964. Subsequent cases of color bias in the workplace are explored, and the enduring impact of the Walker judgment is examined.

Vou aprender a ler pra ensinar meus camaradas: associativismo negro e educação no pós-abolição / I will learn to read to teach my comrades: black associativism and post-abolition education

Este artigo pretendeu evidenciar algumas práticas executadas, no campo educacional, pelo coletivo negro associado ao Clube 28 de Setembro em Pouso Alegre, Minas Gerais. Os recentes estudos sobre associativismo negro no pós-abolição têm revelado o quanto associações beneficentes e culturais, formadas por homens e mulheres negras, contribuíram para a constituição e consolidação de ideias e ações práticas no campo educacional. Verificou-se também que, para aqueles sujeitos, a educação foi considerada a porta de entrada para a ascensão econômica e social, além de ser um meio de combate ao preconceito de cor e uma forma de garantia ao exercício da cidadania plena.* * *This article intends to highlight some of the practices carried out in the educational field by the black group associated to the Clube 28 de Setembro in Pouso Alegre, Minas Gerais. Recent studies of black associativism in post-abolition have revealed how much benevolent and cultural associations formed by black men and women have contributed to the constitution and consolidation of practical ideas and actions in the educational field. It was also found that, for those subjects, education was considered the gateway to economic and social rise, as well as being a means of combating color bias and a form of guarantee to the exercise of full citizenship.