Downsize | Tag safe text truncation for HTML and XML! | Parser library
kandi X-RAY | Downsize Summary
kandi X-RAY | Downsize Summary
Tag-safe HTML and XML text-truncation!.
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QUESTION
I'm seeing very ugly artifacting / jagged edges when I downsize an image on an Android device no matter what I try. I've gone through several potential solutions I found on StackOverflow and blogs, and everything seems to give me similar results.
Scaled Image (214 x 214) (notice the jagged edges):
What I have tried:
- Drawing the image to a
Canvas
using aPaint
with anti-aliasing, and filtering enabled - Multiple variations of
BitmapFactory.decode
bitmap.scale()
- Compressor - an Android Image Scaling Library
All of the above trials have yielded almost the exact same result. This is such a common problem though, that surely I'm overlooking something, or not doing something properly.
If I use a web-based image-resizer, here is the result: What it should look like:
What can I do to get the same results as the above image?
...ANSWER
Answered 2021-May-17 at 04:59The lack of smoothness in the trial image indicate some anti-aliasing is missing.
A relatively quick search show that Sub-pixel antialiasing rules can get complicated.
The next thing is to figure out which tool the "web-based image resizer" used to generate the trial image.
Nine times out of ten (or more) the website would be using FOSS software, which would lead to ImageMagick
A quick run of your source image through ImageMagick with a command like:
convert SO_source_image.png -resize 5% SO_result.png
Results in this similar but not exact (205x205 pixels) image:
At this point you could either dive into the algorithms used by ImageMagick (see the command line options for the variety of methods) or see if you can get a similar result with an existing port like: cherryleafroad/Android-ImageMagick7 or paulasiimwe/Android-ImageMagick
QUESTION
ANSWER
Answered 2021-Apr-23 at 05:26Using flexbox may be more appropriate? note the margin-right on the first element in container 1, and margin-left on the second element in container 2. auto margins are quite powerful in flex containers.
QUESTION
I am trying to use ffmpeg to downscale a video and pipe the stdout data to ffplay to play the new downsized video by piping it to ffplay on aws lambda.
This is the command I have so far, but for some reason adding a scale option is not working.
I am trying to run this command locally before I deploy it on python with subprocess command. I need the raw video to be able to save into database for streaming the data in realtime.
%ffmpeg -i sample.mp4 -vf scale=240:-2 -f mpegts -c:v copy -af aresample=async=1:first_pts=0 - | ffplay -
adding the scale optioin for some reason is saving the video as the name scale=240:-2 which does not make sense.
...ANSWER
Answered 2021-Apr-02 at 16:43This command makes it so that you can convert it in memory rather than saving the video to a local storage as mp4. You can remove the -movflags if you are formatting it as mpegts, but in the case of mp4 you need fragmented flag.
QUESTION
I am using opencv to take images using my webcam.
...ANSWER
Answered 2021-Mar-19 at 20:18You have two options:
Choosing a better global threshold for the gray values. This is the easier less generic solution. Normally, people would choose the Otsu method to automatically select the optimal threshold. Have a look at: Opencv Thresholding Tutorial
threshold, dst_img = cv2.threshold(img, 0, 255, cv2.THRESH_OTSU)
Using an adaptive threshold. Adaptive simply means using a calculated threshold for each sliding window location based on some criteria. Have a look at: Niblack's Binarization methods
Using option one:
QUESTION
I'm fairly new to coding and am struggling with an assignment for my class. The program takes a user input for the size of an Array and prompts the user to enter each value 1 at a time. The array size starts at 3 and if the array needs to be bigger when the array has filled a new array that's 2x size is created and all info is copied into it. I was able to figure out this part but I just can't see what I'm doing wrong in the downsizing part. After the info is copied I have to remove the trailing zeroes. I think I have the downsize method right but I don't know if I'm calling it right
...ANSWER
Answered 2021-Mar-10 at 01:32Giving you a full response rather than a comment since you're new here and I don't want to discourage you with brevity which could be misunderstood.
Not sure what happened to your code when you pasted it in here, you've provided everything but the format is weird (the 'code' bit is missing out a few lines at the top and bottom). Might be one to double-check before posting. After posting, I see that someone else has already edited your code to fix this one.
You're missing a semi-colon. I'm not a fan of handing out answers, so I'll leave you to find it :) If you're running your code in an IDE, it should already be flagging that one up for you. If you're not, why on earth not??? IntelliJ is free, easy to get going with, and incredibly helpful. There are others out there as well which different folk prefer :) An IDE will help you spot all sorts of useful things quickly.
I have now run your code, and you do have a problem! It's in your final method,
downsize()
. Look very, very carefully at the return statement ;) Your questions suggests you aren't actually sure whether or not this method is right, which makes me wonder: have you actually run this code with different inputs to see what results you get? Please do that.Style-wise: blank lines between methods would make the code easier to look at, by providing a visual gap between components. Please be consistent with putting your opening { on the same line as the method signature, and with having spaces between items, e.g.
for (int i = 0; i < count; i++)
rather thanfor (int i =0; i. The compiler couldn't care less, but it is easier for humans to look at and just makes it look like you did care. Always a good thing!
I think it is awesome that you are separating some of the work into smaller methods. Seriously. For extra brownie points, think about how you could move that while() block into its own method, e.g. private int[] getUserData(int numberOfItems, Scanner scanner). Your code is great without this, but the more you learn to write tiny units, the more favours you will be doing your future self.
Has your class looked at unit testing yet? Trust me, if not, when you get to this you will realise just how important point 5 can be. Unit tests will also help a lot with issues such as the one in point 3 above.
Overall, it looks pretty good to me. Keep going!!!
QUESTION
I have to reduce incoming files to a size of max 1MB. I use PIL
for image operations and python 3.5.
The filesize of an image is given by:
ANSWER
Answered 2021-Mar-03 at 15:01Long story short, you do not know how well the image will be compressed, because it depends a lot on what kind of image it is. That said, we can optimize your code.
Some optimizations:
- Approximate the number of bytes per pixel using the memory size and the image width.
- performing a ratio updated based on the new memory consumption and old memory consumption.
My coding solution applies both of the above methods, because applying them separately didn't seem to result in very stable convergence. The following sections will explain both part in more depth and show the test cases that I considered.
Reducing image memoryThe following code approximates the new image dimensions based on the difference between the original file size (in bytes) and the preferred file size (in bytes). It will approximate the number of bytes per pixels and then applies the difference between the original bytes per pixel and the preferred bytes per pixel on the image width and height (therefore the square root is taken).
Then I use opencv-python
(cv2) for the image rescaling, but that can be changed by your code.
QUESTION
ANSWER
Answered 2021-Feb-18 at 10:29Have you tried adding this to your .row
QUESTION
I have a pulsing circle that needs to be able to stop pulsing on hover, but then scale to the correct size.
...ANSWER
Answered 2021-Feb-17 at 12:32Animation properties will always override normal properties. You can use a CSS variable to override animation property.
var(--expected-variable-if-exist, default)
QUESTION
I have a column which records time in milliseconds starting at 0 and uniformly increasing by .001. I would like to downsize my dataframe by creating a new dataframe that only records the rows that occur every ten milliseconds.
My problem is that the data is in long format and not all participants took the same amount of time to complete the task, so I cannot just take every 10th row.
To try and clarify, this means that whenever there is 0.000 in the time column, I would like to record this point in the new dataframe and then restart the process of taking every tenth millisecond. So far I have tried using "filter" and "subset" with no success.
This is a small example of the data I have:
ID Time X Y 1 0.000 1 5 1 0.001 2 10 1 0.002 3 15 1 0.003 4 20 1 0.004 (on so on... until 0.052) ... ... 1 0.053 10 25 2 0.000 30 30 2 0.001 35 35 2 0.002 (on so on...until 0.036) ... ... 2 0.037 50 55 3 0.000 55 50And this is what I would like:
ID Time X Y 1 0.000 1 5 1 0.010 30 40 1 0.020 35 45 1 0.030 30 40 1 0.040 33 44 1 0.050 60 100 2 0.000 30 30 2 0.010 40 40 2 0.020 50 50 2 0.030 60 60 3 0.000 55 50 ...ANSWER
Answered 2021-Feb-16 at 14:56You can try subset
+ ave
+ duplicated
like below
QUESTION
I'm trying to ultimately convert this df into json. I want to merge all rows from the df matching on several columns. The remaining columns that remain different, I want them in a list contained in a new 'lob' column. The code below does exactly what I want. But I'm asking because I feel it's really ugly and this is a downsized example. I have many more columns that will and won't match so this will get ugly quickly.
New to Python and Pandas so explanations will be very helpful.
...ANSWER
Answered 2021-Feb-09 at 02:17you can use to_dict
to convert the column to dict records first, then assign to new column.
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