JPEG EOF 与 EOI 标记答案

【问题标题】：JPEG EOF vs EOI markerJPEG EOF 与 EOI 标记
【发布时间】：2015-10-06 13:18:48
【问题描述】：

JPEG file signature 表明 JPEG EOI（图像结束）标记由最终的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（在此示例中为 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 EOI 标记之后的数据，或者这种额外的二进制数据损坏？

如果这不是损坏，这些最终字节中编码了什么信息？

【问题讨论】：

标签： jpeg file-format

【解决方案1】：

JPEG 标准只定义了一个 JPEG 数据流。这就是 SOI 和 EOI 市场之间的情况。 JPEG 之外的任何内容。

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并没有什么问题。但是，如果您在 SOI 标记之前有额外的数据，大多数解码器都会呕吐。

【讨论】：