Consistency of pixel brightness is an important index for LED display. For LED display with un-ideal consistency of pixel brightness

to get pictures file including brightness information by taking photograph

via computer

background can be de-noised

pixel can be positioned

and even information about brightness can be obtained

thus getting file about brightness data

and finally

handled by computer and database

the Excel brightness corrected file will be made. The brightness file corrected in Excel format can be convenient to deliver to the controller of LED display where it will be corrected point by point. In this way

the visual effect of LED display could be greatly improved.