A method, apparatus, and computer-readable storage medium for an improved image processing method applied to an electronic device is provided. The method incudes acquiring a first image including a particular part of a target object.. The first image is collected based on a first focus parameter, and the particular part includes biometric features of the target object. A state of the particular part is detected when the first image is collected. Edge detection on the particular part in the first image is performed to obtain an edge area of the particular part. Sharpness of the edge area is detected. The first focus parameter is adjusted based on the sharpness to obtain a second focus parameter, and the second focus parameter is configured to replace the first focus parameter to collect a second image including the particular part of the target object.