jpeg转换hdr
在线计算网 · 收录于 2022-08-08 11:41:04
-
文件扩展名.jpeg
-
文件类别images
-
程序Adobe PhotoshopApple PreviewCorel Paint Shop Pro
-
主程序MS Paint
-
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.
-
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.
-
MIME类型image/jpeg
-
文件扩展名.hdr
-
文件类别images
-
程序Internet ExplorerSafariFirefoxGoogle Chrome
-
说明这种格式是用来存储位图图像但在其他方面，增强色彩和亮度的性能水平。它融合暴露于捕获的图像中高度照射的阴影或细节方面模糊的音调。 HDR具有这在他们的创作质量的图像的光上升分布不同众多图像组合的能力。
-
技术细节一个HDR文件的像素值可以封闭存在于现实世界的整个色调范围。图像必须显示的像素值的最大可能范围内的能力。捕获直射光和本颜色最大阴影的方式，如人生描绘。 HDR的创建可以通过两种方式来完成，通过不同的照片以某种方式或通过使用特有图像传感器的结合
