bitcoin core – Differences to CCompactSize and CVarInt

The CVarInt encoding is used only for the internal storage of the UTXO sentence and never for the P2P protocol. CCompactSize is used in several places, including the number of transactions per block, the number of inputs and outputs per transaction, and the length of the scripts.

When analyzing block data, you will never encounter a CVarInt. If you experience problems, this is most likely something else or a bug in your CCompactSize decoder.

What are the differences and links between UML profile and UML class diagrams?

I am researching the development of a software platform and have created some class diagrams for the platform. My supervisor advised me to use UML profiles to describe the platform in more detail. After Googling, I still do not really understand the difference between class diagrams and UML profiling. At the moment, I do not think you can connect them. Can someone help me with my question?

Color Correction – How can I prevent the camera from exceeding the differences in skin color?

You probably will not get the colors you want because of the color profile on your camera or RAW software does not meet your wishes.The camera and lens selection can also play a role. Lighting too (see answer by Michael C).

lens selection

Lenses can transmit different frequencies. For example, some produce warmer colors while others are cooler. Some lenses also have defects, eg. For example, "glow" when opened wide. Some people find a soft focus in portraits as pleasant.

The automatic white balance in some cameras normalizes color differences between lenses. For other cameras, it does not work. Setting Custom White Balance normally neutralizes many color differences in the lens.

camera settings

If you are disciplined, you should Set the custom white balance , However, if you record in different lighting conditions, forgetting the white balance may ruin dozens of subsequent shots or waste your time in post-processing. (How important this is depends on your workflow.)

Some cameras allow color shifts for automatic white balance. Since AWB on my camera tends to produce images with more magenta than I would like, I set AWB to increase the complementary color green.

You should too On your camera, choose the color profile that best suits your needs. Usually one or two profiles will suppress magenta colors. The options available vary by camera manufacturer:

  • Fujifilm: Provia, Velvia, Asti, Classic Chrome, ProNeg-High, ProNeg-Low,
  • Canon: Default, portraitlandscape Neutral, loyal,
  • Nikon:Default, Neutralvibrant, portraitlandscape Just,
  • Olympus (Picture modes):i-Enhance, Alive, Of course, muted, portrait,
  • Sony(Creative style):Standard, Alive, Neutral, Clear, deep, light, portrait, Landscape, sunset, night scene, autumn leaves.

  • (You are welcome to suggest changes to camera manufacturers and profile names …)

In general, cameras also allow adjustment of saturation, contrast, highlighting, shadows, noise reduction, and sharpness.

post processing

The annoying skin tones are most likely magentaless so red. Even if the colors are accurate, you may prefer less magenta.

Many tools do the same.The concepts for curves and layers apply to almost all other color customization tools. Apart from that, you can use whatever tool you like best. Regardless of what you choose, It helps to know which primary colors and complementary colors belong together(Red-cyan, green-magenta, blue-yellow), as well as red magenta and blue cyan differ.

  • You can reduce the magenta by around Adjust curvesto increase the complementary color green in relevant areas. Use the color layer mixture to prevent the overall brightness of the image from changing. Use layer masks to isolate changes.

  • You can do the same with Adjust level, You can use the Auto button or use the Eyedropper tool to select white, gray, and black dots. Then look at each channel to see what the software used as a starting point for your customizations.

  • Sometimes slightly desaturatedis enough to fix skin tones. Use a layer mask to isolate changes.

  • Michael C states that he likes HSL / HSV / HSB adjustments. I do not use it at all, because I do not know how to adjust "Hue" to get the intended results consistent.

  • You can try it too Set temperature and color, (In addition to saturation, these are the main color adjustment tools in Google Photos.)

  • Some editors included Skin color specific tools, If these are available to you, experiment with them until you find the settings you want.


In your sample image, the "whites" of the girl's eyes are pink. I used the level tool's gray eyedropper to select a point in their sclera. This resulted in RGB gamma settings of (0.71, 1.08, 1.26). Different points give slightly different values, but this is just a starting point, so it does not have to be "perfect".

I changed the gamma values ​​(0.85, 1.08, 1.1) because I thought the result would be too blue / cyan. Then I changed it (0.85, 1.15, 1.1) to reduce the magenta slightly. Her cheeks are still pink, but it should look more natural and maybe more to your liking.

customized image layers

Another approach is to use auto white balance for a copy of the image. Then use the color coat mixture to maintain the luminosity. Adjust the opacity of the color plane to the taste. (I used 50%.) The result is a bit different. (This is an advanced version of the Laurence Payne approach.)

adjusted picture color level

Color Correction – How can I prevent the camera from exceeding the differences in skin color?

The skin color of my subject is largely inconsistent and I'm not sure what the reason is. For me it looks like the face half suffers from a color shadow that is thrown through the fair hair. At the same time, the color of the skin, which is closer to the center of the face, appears as an exaggeration of slight color differences on the person's skin. These reddish-pink spots are not really visible to my eye.

What is the best way to avoid such problems when taking a picture so that I do not have to fix it later in Photoshop? Is it something with my settings? Woman face with exaggerated skin color differences

SQL Server Express – Differences between Visual Studio data sources and external databases outside of Visual Studio

I have worked with many databases outside of Visual Studio. When I work in Visual Studio and need to work with either Oracle Express, SQLite, or MS SQL Express, I've never used the DataSource feature. Now I've come to a point where I need to use the Database Explorer, now called the Server Explorer function, and I'm looking for an intro and an explanation of the benefits of this feature as opposed to manually coding my databases.

I'm curious now because I have to work on an existing project that used this feature. Since I did not install it, I received the following error message / prompt:

Enter the image description here

My question now asks which way to take? Do I make the installation of SQL Server Express outside of Visual Studio, and then add it, or does this installation work seamlessly from Visual Studio? Maybe I'm confused and there's no other way, and I just have to install SQL Express and then add it as a data source. Here I am easily lost.

Info visualization – Highlight differences between old and new results and convey value to the user

context
I have a dashboard where I want to highlight.

A. Total data that the user has uploaded to our system and the number of matches to this data in our database.
B. The difference between the matches when the X function is enabled.

What I need to convey is that about 200,000 items uploaded by the user fit 50,000 to our database. When the user activates Feature X, the matches are increased to 81 KB.

The following ideas are what I came for

Enter the image description here
1. Of the 200K elements uploaded by the user, 50KD corresponded to our database (consisting of 30KS1 and 20KS2). However, if Feature X is enabled, the matches will be increased to 81K.


Enter the image description here
2. Try to emphasize a more visual representation of the same &

It has proven to be very difficult to communicate effectively. Are there any examples of such workflows that would not confuse the user?

Why do researchers show that the differences exist between genesis blocking?

To explain this, you must understand that on a technical level, a bitcoin does not exist as a "balance at an address" but uses the system "unused transaction issues" (UTXOs). For more information, see this question.

It is especially important to understand this because there is no UTXO for the Genesis Block Reward due to an obvious bug in the Bitcoin codebase, meaning that the Genese Block Reward is not expendable.

Therefore, we can look at all the examples listed.

66.92700504 BTC

https://bitref.com/1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa> https://www.blockchain.com/btc/address/1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa

These block explorers list the balance of the address for which the Genesis Block Coinbase transaction is paid and include the 50 BTC Block Reward in their report.

16.91700504 BTC

https://insight.bitpay.com/address/1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa> https://blockstream.info/address/1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa

These block explorers seem to list only existing and chargeable UTXOs. The block reward can not be spent and was therefore not included in the total.

66.92700504 BTC - 50 BTC = 16.91700504 BTC

and many others that do not summarize two transactions:

for 50 BTC> https://www.blockchain.com/btc/tx/4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b?show_adv=true

and 0.1 BTC> https://www.blockchain.com/btc/tx/3387418aaddb4927209c5032f515aa442a6587d6e54677f08a03b8fa7789e688

These two URLs are associated with certain transactions, not the address itself. The first is the Coinbase transaction (although, as mentioned above, there is no valid UTXO for it), and the second is a transaction that is a 0.1 BTC -UTXO that can be issued by the owner of the system 1A1zP1eP ... Private key.

Python – What are the differences between these two ways to save form information?

I learn how to use Django forms, and have been presented with two ways to store information from a form in a database. I tested both of them and both work with validations, but I did not understand the difference between the two.

The first uses functions inherited from the models.Model class, using the objects.create (** form.cleaned_data) function and passing the form fields as parameters.

In the following example, I instantiate the ProductForm class used by & # 39; forms.ModelForm & # 39; inherits, and use the function 'clean_data' to pass it as a parameter.

def product_create_view (request):

form = ProductForm ()

if request.method == & # 39; POST & # 39 ;:
form = ProductForm (request.POST or None)

if form.is_valid ():
Product.objects.create (** form.cleaned_data)
form = ProductForm ()

data = {}
date['form'] form

Render return (request, & # 39; products / product_create.html & # 39 ;, date)

The second possibility, instead of the function 'objects.create (** dict) & # 39; to use form.save () directly.

def product_create_view (request):

form = ProductForm ()

if request.method == & # 39; POST & # 39 ;:
form = ProductForm (request.POST or None)

if form.is_valid ():
form.save ()
form = ProductForm ()

data = {}
date['form'] form

Render return (request, & # 39; products / product_create.html & # 39 ;, date)

I'd like to know shortly that there are differences between form.save () and Product.objects.create (** dict).

dnd 5e – What are the differences between enchanting and magical objects?

I completely understand if this sounds silly or unusual, as this particular scenario is more for the struggle between more than plausible technical issues. Please scroll down to the main question:

Your party will be accompanied by a dealer and his car (PC). How he travels
If you take his car, he offers an interesting piece
Information … The canvas covering on his car is enchanted
with two spells: Darkness and silence, so a quiet place
rest when someone gets tired (activated only when the flaps are closed,
to create a space). Later, he suggests that when it gets dark, the
Guards for the first watch spend a few hours to rest for the night
Shift.

Although I realize that sounds stupid and bizarre, it's an idea that I use to evolve as I progress (paid to enchant the canvas of his car). I realize that this would bring some limitations, such as:

  • Spells, spells and abilities bestowed on humans
    encapsulated would be suspended temporarily.
  • Crossing dangerous terrain would make recovery more difficult
    to pour.
  • Probably a limit of 2 medium adventurers, a Large, could fit
    Immediately, without preventing the enchantment from working.
  • The car would be vulnerable to accident Recognize magic spells
  • When ambushed, adventurers would be just like the driver in the room
    Give up a surprise attack

All in all, I believe that in some cases this could be an interesting advantage:

  1. As already mentioned, giving the first watchers a chance to rest during the trip would be to avoid fatigue.

  2. Adventurers who want to call an early night camping can do so without ruining the party.

  3. Magic slots can be used a bit more freely in some cases (for classes that receive magic slots per short break, they can now afford to do small things before their break without having to worry about an ambush).

  4. For accompanying missions, a surcharge for "a quiet room" could be charged.

  5. If you tie a trapped enemy with a non-magical rope and use that space, your group can discuss or transport plans without them being smarter.

Again, I realize that this is unlikely to do much for the actual course of the campaign, but I think it could personalize a character if they can aspire to it.

The question: Although my question has inspired many of my concept of a restful space, it provides a more general understanding of magical subject classifications.

In XGE it is said that magical items require special and rare materials, but a magician may act light You do not need any special metal to raise your weapon to a +1 weapon. For me, this means that enchanting an object and creating a magical item would be two different things, right?

If so, What are the differences and boundaries between enchanting and magical objects?