xlsx转换jpeg
在线计算网 · 收录于 2022-08-08 12:17:44
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文件扩展名.xlsx
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文件类别documents
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程序Microsoft OfficeLibreOfficeKingsoft OfficeGoogle Docs
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主程序Microsoft Office
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说明XLSX - 是一个使用早于2007年的Excel程序版本创建的电子书。因此，数据具有由列和线组成的表的形式。每个表都分为具有唯一地址的单元格，该地址由数字和字母字符组成。单元格包含手动输入的数据和作为计算结果获得的信息。XLSX允许使用图像，图表和图形信息。
XLSX文件的格式基于Open XML标准，允许您按ZIP类型压缩数据。存档包含一个文件，用于描述每个工作表的表和单个文件。该格式使得可以使用各种公式和数据源开发和编辑复杂的多表电子表格。
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技术细节使用XLSX格式有助于优化文件内容，即管理和恢复信息的技术。 该格式显着增加了过时的Excel程序变体的二进制文件的功能。 读取扩展名XML的所有应用程序都可以使用XLSX扩展正常工作。 由于以XML格式保存数据，因此提供了可靠的数据存储。 这提供了通过本地网络无缝传输文件的机会。
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MIME类型application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
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文件扩展名.jpeg
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文件类别images
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程序Adobe PhotoshopApple PreviewCorel Paint Shop Pro
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主程序MS Paint
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说明JPEG – is a popular graphic format, which is characterized by a high degree of compression, which leads to a decrease in image quality. It uses the technology of encoding of smooth color renditions, providing the ability to reduce the amount of data frequently during the recording of the image.
Because of the small size it is requested by the owners of websites, allowing you to save the traffic effectively. It is also frequently used in memory cards of digital video cameras. The JPEG algorithm is optimally suitable for compressing photographs and pictures, in which realistic scenes with little contrast of colors are present. It is not recommended to use this format for compression of drawings and various kinds of graphics, since a strong contrast between a number of closely located pixels provokes the appearance of visible artifacts.
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技术细节The procedure for compressing the digital images in JPEG format is carried out in several stages. First, the photo is transformed into a color space YCbCr, then it is divided into squares to determine the upper range of the color spectrum. Finally, the colors and brightness are coded.
JPEG uses a "lossy" compression system and discrete cosine transform technology. The format acts simultaneously as the standard of ISO and the International Telecommunication Union. The file compression ratio is in the range from 10:1 to 100:1. In this case, the reduction in image quality can vary from insignificant to substantial.
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MIME类型image/jpeg
