This is how to upload pictures to item master using report in C/AL programming.
You can download the reports for different versions (fob/txt formats) using following links.
After download object you can change current object id 50200 to another id using txt object.
***Important :- All item images must in same folder and it's name must same with related item no.
***Important :- All item images must have same type. (Ex:- BMP,JPEG,..)
Before runing this report you must give folder path of images and type of images.