Systems and methods for image processing

A system for image processing, comprising:

• at least one storage medium including a set of instructions;
• and
• at least one processor in communication with the at least one storage medium, wherein when executing the set of instructions, the at least one processor is directed to cause the system to:
• obtain a target image to be processed, the target image including one or more target pixels to be processed;
• for each of the one or more target pixels,
• select one or more previous pixels and one or more subsequent pixels along a predetermined direction in the target image;
• determine a first gray value based on the one or more previous pixels and a second gray value based on the one or more subsequent pixels;
• select a target gray value from the first gray value and the second gray value based on an initial gray value of the target pixel, wherein to select the target gray value from the first gray value and the second gray value based on the initial gray value of the target pixel, the at least one processor is directed to cause the system to:
• in response to the determination that the first gray value and the second gray value are smaller than the initial gray value of the target pixel, select the smaller one of the first gray value and the second gray value as the target gray value;
• and
• determine an adjusted gray value of the target pixel based on the initial gray value and the target gray value.