I can. However, the png format in 2 and more times larger than jpeg. When posting on the forum this will lead to a significant loss of quality. In photoshop monochrome background stands out and is removed very simply and quickly: the file is copied to a new layer and use shift+magic wand. For example.
When working with the tools of photoshop can produce artifacts (garbage). In particular, such a picture as You I got when I increased the length of the canvas down to the selection. The formation of artifacts depends on a variety of reasons until the features of the computer. However, this debris which could have removed manually for 1-2 minutes. If you work with the original image of the debris is not formed. The above two images - jpeg, ~120 KB and png, ~ 250 KB, with the same quality.
These are interesting and useful information.
Not yet six minutes? Wow!
With the polygonal lasso no problems - that is allocated that is highlighted. I usually use it with this tool, but prefer not to set point and allocate pixels at high magnification. But it's a matter of taste. Talking about the magic wand tool which allows one click to select large areas of complex shape. Since this instrument is tuned to the difference of light and colors that stand out well solid areas of color with a small difference in light.
A little Toshiba netbook, Windows 7, a mouse and a portable Photoshop which a child could use. I do understand what you mean by getting pleasure and taking your time. It can be a very relaxing pastime,
