APOD: Black Sun and Inverted Starfield (2012 Oct 15)

Comments and questions about the APOD on the main view screen.
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Anthony Barreiro
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Re: APOD: Black Sun and Inverted Starfield (2012 Oct 15)

Post by Anthony Barreiro » Mon Oct 15, 2012 10:40 pm

JimLafferty wrote:@Anthony>>>>the image was taken on September 26, 2012.

Regards!

Jim

Jim Lafferty
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Thanks Jim!
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starbridge
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Re: APOD: Black Sun and Inverted Starfield (2012 Oct 15)

Post by starbridge » Mon Oct 15, 2012 11:30 pm

The black sun looks to me like a micrograph of a white blood cell.

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Re: APOD: Black Sun and Inverted Starfield (2012 Oct 15)

Post by Boomer12k » Mon Oct 15, 2012 11:59 pm

An Ocean of Flames.... 8-)


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Re: APOD: Black Sun and Inverted Starfield (2012 Oct 15)

Post by saturno2 » Tue Oct 16, 2012 12:14 am

The Sun?
Strange image :?

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Ann
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Re: APOD: Black Sun and Inverted Starfield (2012 Oct 15)

Post by Ann » Tue Oct 16, 2012 12:17 am

Thanks for commenting - twice - on your fascinating-looking image, Jim.

Ann
Color Commentator

AustiMN

Re: APOD: Black Sun and Inverted Starfield (2012 Oct 15)

Post by AustiMN » Tue Oct 16, 2012 3:21 am

It reminds me of a spongy old mushroom, seen from the top down.

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Re: APOD: Black Sun and Inverted Starfield (2012 Oct 15)

Post by neufer » Tue Oct 16, 2012 4:08 am

AustiMN wrote:
It reminds me of a spongy old mushroom, seen from the top down.
Click to play embedded YouTube video.
Art Neuendorffer

RickM

Re: APOD: Black Sun and Inverted Starfield (2012 Oct 15)

Post by RickM » Wed Oct 17, 2012 3:00 pm

A detailed solar view was captured originally in a very specific color of red light, then rendered in black and white, and then color inverted. Once complete, the resulting image was added to a starfield, then also color inverted.
if you color invert a black and white picture, don't you still have a black and white picture? How then does the sun's image get its bluish cast?

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Chris Peterson
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Re: APOD: Black Sun and Inverted Starfield (2012 Oct 15)

Post by Chris Peterson » Wed Oct 17, 2012 3:29 pm

RickM wrote:
A detailed solar view was captured originally in a very specific color of red light, then rendered in black and white, and then color inverted. Once complete, the resulting image was added to a starfield, then also color inverted.
if you color invert a black and white picture, don't you still have a black and white picture? How then does the sun's image get its bluish cast?
The original description is a bit off. Actually, the source image should be described as monochromatic: there is only a single value (intensity) associated with each pixel. This is how the image was collected, not rendered. The result of this sort of imaging is a grayscale image. However, such images are often rendered in color, using some sort of mapping between intensity and color, since this can let us see more detail, and also can provide a more aesthetically pleasing image. That appears to have been done here.
Chris

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JimLafferty
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Re: APOD: Black Sun and Inverted Starfield (2012 Oct 15)

Post by JimLafferty » Thu Oct 18, 2012 3:37 am

The stacked monochrome image was inverted and then colored.--thanks.

Jim
Jim Lafferty
Redlands, Ca

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