Piksel
Dalam bidang imejan digital, piksel (picture element[1] atau unsur gambar) merupakan cebisan maklumat yang paling kecil dalam sesuatu imej. Piksel biasanya disusun dalam sebidang grid dua matra, dan berbentuk titik atau petak halus. Setiap piksel adalah satu sampel dari imej asli, oleh itu lebih banyak sampelnya maka lebih tepat gambaran imej asli tersebut. Keamatan setiap piksel adalah berbagai-bagai; dalam sistem paparan berwarna, setiap piksel biasanya mengandungi tiga atau empat komponen seperti merah, hijau dan biru, atau sian, magenta, kuning dan hitam.
Selain piksel, terdapat juga voksel (volume element atau unsur isi padu)[2] dan teksel (texture element atau unsur tekstur)[3].
Rujukan
[sunting | sunting sumber]- ^ Rudolf F. Graf (1999). Modern Dictionary of Electronics. Oxford: Newnes. m/s. 569. ISBN 0-7506-4331-5.
- ^ Foley, James D. (1990). "spatial-partitioning representations". Computer Graphics Principles and Practice. The Systems Programming Series. Addison-Wesley. ISBN 0-201-12110-7.
These cells are often called voxels (volume elements), in analogy to pixels.
Unknown parameter|coauthors=ignored (|author=suggested) (bantuan) - ^ Foley, James D. (1990). "surface detail". Computer Graphics Principles and Practice. The Systems Programming Series. Addison-Wesley. ISBN 0-201-12110-7.
This approach is known as texture mapping or pattern mapping; the image is called a texture map, and its individual elements are often called texels.
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Pautan luar
[sunting | sunting sumber]- A Pixel Is Not A Little Square: Microsoft Memo by computer graphics pioneer Alvy Ray Smith.
- A Brief History of 'Pixel': More than you need to know about the history of pixel, pel, and picture element.
- Pixels and Me Diarkibkan 2011-06-22 di Wayback Machine: Video of a history talk at the Computer History Museum.
- Square and non-Square Pixels: Technical info on pixel aspect ratios of modern video standards (480i,576i,1080i,720p), plus software implications.