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BlockHead
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- BlockHead
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Comments
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Ok. For others...just need to make the readout preview visible. -the Blockhead
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That was my point. There isn't really a reason to focus on getting the true signal strengths. However, it does act as a foundation in terms of a starting point from one NB image to the next. You said there was a debate...it sounds like a preference …
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We are tri-chromats. We blend large swathes of the spectrum together to create intermediate colors. There isn't a way to do this with NB since these wavelengths are not there in the first place. You can mix NB colors and try to to approximate broadb…
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I am not certain I understand. What do you mean by True Color for NB? You can certainly choose color mixes that result in colors that look like those of broadband imagery- but this doesn't have anything to do with actually being an approximation in …
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The clamping threshold will minimize hard edges when Lanczos is used as the interpolation method ... especially as it related to undersampled data. Please reference the precise commentary or webpage that discusses your question... otherwise I pretty…
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I simply do not know enough to answer your question. This is a color space issue. My gut says, No. When you adjust the saturation you do affect the hue in some subtle ways- and as the video demonstrates it is tied with the lightness as well. On the …
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Color saturation with respect to the lightness of an image is a non-trivial thing to explain. I can't do it. Have you seen this? -the Blockhead
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Ray, An interesting challenge would be to present the same problem as you did with me and see if anyone else can solve it (as quickly). Maybe pass on the word to Robin that I am genuine? PI is not always backward compatible in certain areas. Not so …
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Ray, One of the things that is very subtle that people do constantly (drives me a little mad) is take calibration data with different software programs. This can definitely cause issues. You did not do that... But what you DID do was UPGRADE your so…
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There is a dark frame exposure tolerance. (when you are in the Darks tab, your first picture you will see the option to the right.)The default is 10 seconds I believe. If you want to have exact matching of darks you would lower the exposure toleranc…
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This is unreasonable. It means the flats are no being calibrated correctly.You need to make certain you are not changing gain settings or software in any way between types of data. All has to be the same. You need to check your configuration in WBPP…
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Hi Roger, So a couple of things. 1. The number of videos in Fundamentals is grown (and continues to grow). They have different degrees of "freshness" in terms of the evolution of PixInsight. Organization of all of this in either topic or time domain…
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Hi Frederic, The information is in the ImageIntegration Primer series of videos. Please see the Fundamentals Path here:https://www.adamblockstudios.com/articles/the-pixinsight-path #54 - #60 will explain quite a bit. It you type "standard deviatio…
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Hi Brent, I have not looked into this.My gut says you need to assemble the mosaic first and then later extract the channels to give you your base Ha, OIII, SII data. A color image is just a container, a multiplex. The data really isn't touched (othe…
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Hi Jesus, Yeah, you are encountering the fact I could not explain everything in the FastTrack course...it is just a BEGINNING. If you like what I did there- you will definitely like Fundamentals. The information you want is in Fundamentals here:http…
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What I am referring to is here:h ttps://youtu.be/mPi8SwfZ27Q?t=200 I will make the sky neutral by removing the bias in each channel and *then* stretch the channels together with a common stretch. If I have color calibrated images with correct scali…
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You are referring to the image normalization? v-backgroundReferencethen image normalization (from SPCC background Neutralization) template static void ApplyBackgroundNeutralization( GenericImage& image, const DVector& backgroundReference ) …
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Ray, Fundamentally the overcorrection is telling you there is an issue with the darks/biases that are being used to calibrate the flat field images. Even worse, is that the flats are perhaps not be calibrated at all. Or there could be a configuratio…
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You got it right. If multiscale analysis works- it means PixInsight does not agree that your PSFs are of good quality. And so as you note the star shapes are the issue. PSF fitting will fail (as it should) and multiscale methods (basically structur…
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As far as compressing (scaling) the data in GHS to move the histogram to the left- I believe this is wrongly conceived. You want to do this with the linear mode since this is an additive pedestal and you are effectively subtracting it. Shifting in t…