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Some programs re-encode JPEG images even if nothing is changed, so they add even more artefacts. If you do some changes in an image (even if just cropping it), saving it as a PNG (or even GIF, if it's monochromatic) is always better.
Originally posted by BigBrotherDarkness
I'll try to get some up in PNG, unaltered unless the original format from NASA is JPG, then I will keep it native, unless you think PNG would be better.
That's why I think it's always a good idea providing the original along with any altered version, as that way people can see what we are talking about and still look at the original.
I removed the digital camera distortion and it went from grainy sandy to watery from blending with adjacent pixels. Making it a lot clearer in my opinion, but I agree any alteration from original causes more distortion not less...
On another note I have developed the ability to see 3D from a 2D due to my line of work in engineering, if a top, front, and right hand side isn't available, and it is a 2D isometric representation like this is, you have to rely on light and shadows to see the 2D feature in 3D.
Speaking of which does anyone have a direct NASA JPL link to the "Bunny" I'd like to examine it more closely.
Originally posted by BigBrotherDarkness
The shadow I was referring to, is the cast base shadow from a light source. The darker areas on an object rarely contain any visual information of the objects true shape.
I personally prefer the TIF format, as I mainly deal with raster and graphic images.
Although I understand why perhaps you prefer the B/W, not being fond of dark spots and all, it does make the base shadow very prominent.
Greyscale images are better to understand shapes, as colour may be a source of optical illusions, although those also happen in greyscale images.
Originally posted by BigBrotherDarkness
reply to post by abeverage
That's a Mars image? Yeah, I have no idea what those things are wow very odd.