No abstract

K e y Words: Multimedia, image quality measure, image compression. A B S T R A C TThis paper describes a new measure for calculating the error that has been introduced when an image is modified which can be used to compare the quality of images. It is based on the following principle:The quality of an image should be measured locally and globally. This implies that:(1) Since the change of each pixel value affects the quality of the image, and the overall quality is dependent on the total number of pixels that were changed, the total number of pixels that were changed should hence be used in evaluating the quality of the image.(2) The change of each pixel value first affects the quality of a small part of the image that directly contains the pixel, and the change of that part of the image affects the quality of the whole image. This suggests that image quality should be evaluated part by part rather than pixel by pixel.Experimental results show that this proposed measure performs better than the signal-to-noise ratio and colour-based methods. It not only works well when the other two methods work but also works where the other two methods fail.

No abstract

No abstract

Hungary stands at a pivotal point in establishing its role as a global leader in the modern approach to historical photo archiving. Born from the effort of two friends to save discarded family photographs from dumpsters and trash bags on the streets of Budapest, the Fortepan archive (fortepan.hu), now with over 150,000 donated images, has become a cultural institution within Hungary as well as a disruptive force to the archival paradigm in both content and accessibility. Fortepan has rejected traditional archival practices such as exclusivity, restriction, and regulation in favor of openness, crowdsourcing, free public downloading and use, and a new web-based structure which releases images from the limitations of historical provenance and original order. Donated images are scanned at high resolution, curated, and organized by date on a timeline that invites users to immerse themselves in the curious, poetic, and mundane moments of everyday life. Acting as a collective “family album” for Hungary, Fortepan places the public at the forefront of archival practice by inviting them to contribute to their recorded history and public memory as donors, volunteers, taggers, historians, and citizen archivists.