By pressing the above key combination, Photoshop will show you the “Gaussian Blur” Dialog box. You can adjust the settings by moving the slider. Since in the previous use of the blur filter you have used a very large pixel value, you will need to apply a smaller amount of blur.

You only have to use a small amount of blur. You will see that your water drops will have smother edges with a value of just 0.7 – 0.9 pixels.

Click the “OK” button so the Gaussian blur will be applied to the picture.

At this point you can select only the water drops from the picture and delete the rest (in your case, all the white parts of the image). Select all the black spots using the “Magic Wand”. You will find it in the Tools palette, or by pressing the W on the keyboard.

Be sure to have the “Magic Wand” tool selected. Look up in the Options Bar situated at the top of the screen and be sure not to have the “Contiguous” option checked. If this option was selected, you would have to select each black spot individually. You will be able to select them all at once if this option is not selected.

At this point you have all the black areas selected. What you really need is to have the white parts of the picture selected so you can delete them. To do this, you will need to invert the selection (by inverting the selection, Photoshop will select all that is not currently selected – in your picture you are editing it will select the white parts of the image and deselect the black spots). Use the Ctrl+Shift+I key combination to invert the selection. Now all the white area will be selected.