"局部图象分析法" can be translated as "local image analysis method" or "partial image analysis technique".
"Local" or "partial" both convey the idea of focusing on a specific part or region of an image.
"Image analysis" refers to the process of extracting meaningful information from images.
"Method" or "technique" can be used interchangeably to describe the approach or procedure used for this analysis.
选择哪个表述可能取决于具体语境和偏好，但两者在传达核心意思上都是准确的。