How to remove shade from a rectangular picture?

[santander]

How to remove shade from a rectangular picture (on the edges of object)? I can just select a picture without shade use Rectangular Marguee Tool, then Copy and Paste into new image(or just do Image > Crop then Save). Or there is other ways, eliminate the shadow use layers, etc?

 

[sPECtre]

You could use the crop tool ( C ) to do it in one swoop. Just leave the settings blank in the option bar.

 

[santander]

Where do you meant leave the settings blank in the option bar? After crop I do 'save as', select jpeg(original is .PSD), quality?

 

[sPECtre]

When you are using the crop tool, otherwize, you'll be resampling, or changing ths size of the image...
You save in the format that you want, jpeg is lossy, while PSD is lossless...