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JPEG EOF 与 EOI 标记

转载 作者:行者123 更新时间:2023-12-04 18:04:40 27 4
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JPEG file signature指出 JPEG EOI(图像结束)标记由最后的 FF D9 给出。 .但是,我偶尔会遇到在此 EOI 之后也有少量数据的 JPEG(在本例中为 02 24 ...):

FF D8 FF E1
...
...
FF D9
02 24 02 24 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 48 00 00 00 00 00 00 00 00 00 00 00 00 27 10 00 00 00 00 00 00 00 00 27 10 00 00 00 00 27 10 00 00 27 10 00 00 00 00 00 00 00 00 27 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 41 58 53 21 00 1E 5D 32 00 00 00 00

JPEG 标准是否允许跟随 EOI 标记的数据,或者这是额外的二进制数据损坏?

如果这不是损坏,那么在这些最终字节中编码了哪些信息?

最佳答案

JPEG 标准只定义了一个 JPEG 数据流。这就是 SOI 和 EOI 市场之间的关系。 JPEG 之外的任何东西。

JPEG 没有定义文件格式,因此从技术上讲,在开头或结尾添加额外数据没有任何问题。但是,如果您在 SOI 标记之前有额外的数据,大多数解码器会呕吐。

关于JPEG EOF 与 EOI 标记,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32971054/

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