jpeg转换ico
在线计算网 · 收录于 2022-08-08 11:41:04
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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
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文件扩展名.ico
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文件类别images
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程序Adobe PhotoshopMicrosoft PaintWindows Picture and Fax Viewer
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说明ICO - 是一种在Windows操作系统中显示图标，快捷方式和图标的特殊格式。 它代表两个位图。 第一个是图像蒙版，第二个是蒙版上显示的图标。 它用于将图片与OS文件连接。 具有Microsoft操作系统的设备用户可以编辑ICO文件以创建特殊图标。 它可以转换为具有流行的JEPG和PNG扩展名的文件。
在以指示器，图标和类似图形元素的形式开发图形时，使用在ICO中保存文件。 它们用作图标和站点徽标。 它们由任何用于查看图像和ACDSee或Axialis IconWorkshop等特殊程序的应用程序打开。
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技术细节从最初的Windows操作系统版本开始使用.ico扩展，逐渐增加支持的色调大小和最大数量。 例如，“七”是指“七”。 能够支持32位高达256x256像素的图标。 为确保与早期版本的Windows兼容，最好使用八位图标版本。
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MIME类型image/icoimage/x-iconapplication/icoapplication/x-icoapplication/x-win-bitmapimage/x-win-bitmapapplication/octet-stream
