fix image size and crop and bg alignemnt options

app/controllers/merged/images_controller.rb

@@ -31,18 +31,14 @@ module Merged
     end
 
     def scale
-      mini = MiniMagick::Image.new( @image.full_filename)
-      mini.resize( "#{params[:scale]}%")
-      @image.init_file_data
+      @image.scale( params[:scale] )
       @image.edit_save(current_member.email)
       redirect_to image_path(@image) , notice: "Image was scaled"
     end
 
     def crop
-      mini = MiniMagick::Image.new( @image.full_filename)
       size = "#{params[:size_x]}x#{params[:size_y]}+#{params[:off_x]}+#{params[:off_y]}"
-      mini.crop( size )
-      @image.init_file_data
+      @image.crop( size )
       @image.edit_save(current_member.email)
       redirect_to image_path(@image) , notice: "Image was resized"
     end