相机图片元数据
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
ARCore 允许您使用 ImageMetadata
从
相机图片拍摄结果。下面列出了一些常见类型的相机图像元数据
比如焦距、图片时间戳数据或光线情况
信息。
Android Camera
模块可以记录 160 个或更多与图片相关的参数
具体取决于设备的功能。有关
可能的元数据键,请参阅 ImageMetadata
。
使用getImageMetadata()
以获取特定的元数据键值对,并捕获 MetadataNotFoundException
。
。以下示例展示了如何获取
SENSOR_EXPOSURE_TIME
元数据键值对。
Java
// Obtain the SENSOR_EXPOSURE_TIME metadata value from the frame.
Long getSensorExposureTime(Frame frame) {
try {
// Can throw NotYetAvailableException when sensors data is not yet available.
ImageMetadata metadata = frame.getImageMetadata();
// Get the exposure time metadata. Throws MetadataNotFoundException if it's not available.
return metadata.getLong(ImageMetadata.SENSOR_EXPOSURE_TIME);
} catch (MetadataNotFoundException | NotYetAvailableException exception) {
return null;
}
}
Kotlin
// Obtain the SENSOR_EXPOSURE_TIME metadata value from the frame.
fun getSensorExposureTime(frame: Frame): Long? {
return runCatching {
// Can throw NotYetAvailableException when sensors data is not yet available.
val metadata = frame.imageMetadata
// Get the exposure time metadata. Throws MetadataNotFoundException if it's not available.
return metadata.getLong(ImageMetadata.SENSOR_EXPOSURE_TIME)
}
.getOrNull()
}
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最后更新时间 (UTC):2024-09-12。
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