pixel-perfect | Make your web development Pixel Perfect | Frontend Framework library
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kandi X-RAY | pixel-perfect Summary
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QUESTION
I have a dataset with drone view images of size 4000x6000, grayscale. Each individual pixel value corresponds to a class (I have 20 classes in total), so a pixel value of 3 would mean "tree" for example. Using the original image, I can very easily create binary masks for all 20 of the classes by using equality operators in NumPy and I get pixel-perfect masks.
Here's an example of what one row would look like:
[[2, 2, 2, 2, ...... , 5, 5, 5]]
However, 4000x6000 is much too big for my purposes, and I want to resize these segmentation targets to something a bit more bearable, such as 400x400 or 400x600. Though I've tried a few different Python libraries, all of them convert my pixel values to different float values causing me to lose my segmentation map labels. Is there any method (not including cropping), where I can resize my segmentation target maps AND the original RGB input images without losing my labels?
...ANSWER
Answered 2021-Jun-09 at 05:01When one resizes an image, one usually needs to interpolate pixel values (e.g., decide on the "intensity" at sub-pixel locations). Natural images tend to vary smoothly between pixels, which makes interpolation with large support very appealing (see detailed discussion here).
However, as you observed, interpolating between integer values of labels makes no sense at all.
Therefore, you can:
Do not interpolate - use nearest-neighbor resizing for the label map.
That is, use whatever interpolation method you like (LANCZOS,BICUBIC...) for the input image, but useNEARESTmethod for the label map.Interpolate the per-label probability maps - for each
4000x6000label map, produce 20 per-class probability maps and interpolate them to the desired size (using the same interpolation method as used for the image:LANCZOS,BICUBIC...). Now, for each resized pixel you have a 20-dim target distribution. You can train with these "soft labels", or take theargmaxand train with the most dominant label per pixel.
QUESTION
I used this code for responsiveness in my UI. So what this code basically does is calculate the size of the screen and I use the functions below to put the exact font size according to the design provided to me in Figma or Adobe XD. Using this method, I was able to create pixel-perfect UI.
After upgrading to Flutter 2.0.3, I am getting null safety errors. I was able to solve most of them but I am not able to solve this error.
Please advice.
Complete Code
ANSWER
Answered 2021-Apr-07 at 12:59Because SizeConfig.defaultSize is nullable, you need to make sure that its value should not be null.
You can add some assertion to notify the caller that SizeConfig should be initialized first. Then, you can change it to SizeConfig.defaultSize!.
Sample...
QUESTION
I'm working on DOM Playground, where I'm editing the page's style strictly using Javascript (I know its inefficient – its for an assignment). DOM Playground
For the most part, I'm almost done. I just need to add list elements in the unordered list that is commented (I'll share the code below). There is an array called resources, which holds five objects with the following properties – title, href, and innerHTML.
I'm trying to create a forEach function, that runs through the resources list, and inserts a list item (li) with the same href, title, and innerHTML as the objects in the array. So for example, resources[0] =
...ANSWER
Answered 2021-Mar-05 at 21:04If your resource list is an array of objects, using the same object form as given in your example, this code snippet should give you what you need,
QUESTION
Im trying to match some vectors above a Image comonent. In order to do this pixel-perfect, I need to know the size of the image displayed inside Image component.
At this point I have the width and height of the component layout, but can't figure out how to calculate the width and height of the image once is inside the Image component.
I tried to calculate the following way with the proportions of with and viceversa, but there are some cases (specially vertical image) where this does not work.
...ANSWER
Answered 2021-Jan-18 at 22:25Use the .clientWidth and .clientHeight properties of the image element to determine its actual scaled width and height. If for some reason that's not an option, you can do the calculation yourself:
If ( photo.width / photo.height ) > ( containerWidth / containerHeight ) then the photo has a wider aspect ratio than the container and can be scaled to fit full-width in the container, with letterboxing (blank space above and below). The new width and height of the photo is:
QUESTION
I have a nested list with counters:
...ANSWER
Answered 2020-Dec-05 at 13:13You can use position: absolute in ::before
QUESTION
I have some elements within a section in a webpage. Here's my code. You just need to look at the section with id="recent-blog-article". I am including more code because it might help people understand. In the CSS, the relevant portion is below the /* Relevant Section */ comment.
ANSWER
Answered 2020-Oct-07 at 19:38On the image's CSS first try:
QUESTION
I am trying to put similar groups of elements in a grid:
...ANSWER
Answered 2020-Oct-07 at 16:52Since your content-* elements are not direct children, they are not affected by the #grid parent. You can make your #content element a grid parent.
I changed the grid-template-areas for your #grid element and update the CSS to include styles for the #content element (which you may need to update for your needs)
QUESTION
I am learning web designing by trying to clone a part of a website. Here is my html code:
...ANSWER
Answered 2020-Oct-05 at 15:41Add position: absolute; to the #search-bar selector
More information on the position property: https://developer.mozilla.org/en-US/docs/Web/CSS/position
QUESTION
Note: I do not want to use pygame sprites.
I am making a simple game and I need a way to detect if two images overlap using pixel-perfect collision in pygame. All the answers I have found so far require that I use pygame sprites, which I prefer not to use because I have less control over the objects.
(These images have transparent backgrounds)
...ANSWER
Answered 2020-Jun-16 at 08:23First of all, don't be afraid of Sprites.
A Sprite is just a simple class with an image (a Surface that is stored in the image attribute) and the size and position of the image (a Rect stored in the rect attribute).
So when you use a class like this:
QUESTION
I'd like to draw on a JavaFX Canvas. Coordinates for the canvas are provided by double values, but I understand that in order to "snap" to the pixel grid, I need integer numbers to avoid drawing "inbetween" pixels, which will result in a blur/smoothing on edges.
Consider this minimal example:
...ANSWER
Answered 2020-Jun-14 at 23:41You can solve this by eliminating the scaling used by scaling the Canvas to a smaller size. Here is a sample (note that lines are drawn "in between" pixels in JavaFX, so to get them sharp you need to add 0.5).
This example also places a Group around the scaled Canvas. This is required to take the scale into account when doing layout, but also has some effect on rendering. This example was tested at 100%, 125% and 150%.
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