Scripts
To upload multiple images into one document open images via scripts and load files from stack...
Browse for images, for this we are using the Chicago Bean
Smart object is displayed in photoshop but is editable outside of photoshop. If we save all images as smart object it will collapse all the images onto one layer as opposed to multiple layers. To edit a smart object just double click and it opens all layers.
By going to layers, smart object, stack mode and selecting median it removes all people from the foreground.
However the sky is really blurry, to rectify this go to file, place and select an image with a sky you prefer.
But the people return to the meaning we need to delete sections of the photo but it's a smart object. To rasterise the layer, right click on the layer and rasterise layer. This allows to select sections.
Use the quick selection tool to select only the sky, select inverse and delete, this leaves us with only the sky on that layer.
File formats
Lossless- For print based images (PSD when working on it, TIFF when finished)
Lossy- Compress images to load quicker for screen based images (JPEG)
PDF portable document format