"局部图象分析法" can be translated as "Local Image Analysis Method" or "Local Image Analysis Technique". Both translations are acceptable, with the choice depending on the specific context and the level of formality desired.
"Local Image Analysis Method" emphasizes the approach or procedure used for analyzing specific parts of an image.
"Local Image Analysis Technique" highlights the skill or method applied in the detailed examination of image regions.
In most cases, either translation would be appropriate.