Mosaic | Real time Photographic Mosaics for iOS | iOS library
kandi X-RAY | Mosaic Summary
kandi X-RAY | Mosaic Summary
Mosaic makes it easy to create Photographic mosaics on still images or live video feeds.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Mosaic
Mosaic Key Features
Mosaic Examples and Code Snippets
let images = [
UIImage(named:"myImage_1.jpg")
UIImage(named:"myImage_2.jpg")
UIImage(named:"myImage_3.jpg")
...
]
let mosaic = try! Mosaic(imagePool: images)
let imageToTransform = UIImage(named:"myImage_4.jpg").cgImage!
let photoMo
def main() -> None:
"""
Get images list and annotations list from input dir.
Update new images and annotations.
Save images and annotations in output dir.
>>> pass # A doctest is not possible for this function.
""
Community Discussions
Trending Discussions on Mosaic
QUESTION
I'm trying to recreate the mean-median difference test described here: Archive of NYT article. I've downloaded House data from MIT's Election Lab, and pared it down to the 2012 Pennsylvania race. Using dplyr
, I whittled it down to the relevant columns, and it now looks something like this:
ANSWER
Answered 2022-Feb-09 at 23:58I figured it out! Randomly placing voters in each district is not correct, and honestly it was pretty silly of me to do so. Instead, I had to use dplyr
to create a data frame with the number of Democrat and Republican votes in each of the 435 House districts, one district per row. Then, I followed the advice on page 12 of this paper. I created samples of 18 districts sampled from this 435-row data frame, rejecting them if the mean vote share was more than 1 percent away from that of PA. The results have a much nicer 95% confidence interval, that matches the results of the original article.
QUESTION
I'm trying to read a number of Siemens DICOM images with DCMTK, some of which are mosaic images. I'm looking for a quick way to find those.
What I can see with mosaic images is that this is specified in the ImageType tag, e.g.
...ANSWER
Answered 2022-Jan-26 at 11:17Image Type (0008,0008) is a multi-valued attribute. That is, it may include several values which are separated by the backslash character. Note, that "officially", the backslash is not part of the attribute's value. It is a delimiter between several values of the attribute. This is what you have. So in terms of DICOM, there is no "one value" but multiple ones. The DCMTK API allows you to handle this (of course).
findAndGetOFString() has a third parameter ("index") to define which of the multiple values you want to obtain.
The behavior that you probably expect is what findAndGetOFStringArray() does.
As an alternative, you could iterate through the multiple values of the attribute by obtaining the "Value Multiplicity" first and then loop through the values like
QUESTION
The lidR package has a neat way to work with huge (pointcloud) datasets: The catalog
function (doc here) avoids loading the dataset to memory and can treat mosaics [datasets that are spread across multiple (non-overlapping) tiles] as single dataset. It loads required tiles on-the-fly during computations in an intelligent way. It is great to avoid working with huge files (multiple GBs) and keep memory requirements lean if only working with small parts of the dataset.
Is there a similar convenient/memory-efficient/"lidR-catalog-way" to process large raster mosaics in R? Or more put in a more general way: Is there a way to work with mosaic raster datasets in R without merging them first?
I am aware of the mosaic
(doc) and merge
functions, which allow me to merge my tiled raster mosaic into a single raster dataset. I also found that gdal
will do so a lot faster and memory efficient. Here is a R-snippet for this:
ANSWER
Answered 2021-Nov-30 at 16:52You should look into the terra
package which provides exactly the functionality you're looking for through virtual raster tiles (VRTs). We can use them to treat a collection of raster files on disk as a single raster file while taking advantage of the API to do a majority of the same tasks as you can do through the raster
package.
First, let's create a sample of 4 rasters using the example straight from the ?terra::vrt()
documentation.
QUESTION
With a large number of variables, the sizing of tick mark labels is too large in barplots along the diagonal of a mosaic pairs plot created with pairs_barplot()
in the R vcd package. Is there any way to make them smaller? Here is a minimal working example:
ANSWER
Answered 2021-Oct-17 at 23:51Currently, you cannot set gpar()
for drawing the y-axis of the bar plot explicitly. There are two general workarounds, though: (1) Not messing with the font sizes but instead plotting on a bigger device. (2) Setting an outer viewport with a different gpar(fontsize = ...)
that is used as the viewports further down in the plot.
For illustration I use a png()
device here because the PNG graphic is what I embed on StackOverflow. But, of course, you could use the same trick on other devices including those that you do not create yourself but via chunk options in R/Markdown etc.
I use a device size of 13 x 13 inches (as opposed to a more common setting of 6 x 6 or 7 x 7 inches). Then I can omit all of the gpar()
settings because the device is large enough to accomodate the default parameters. I still set abbreviate
and var_offset
, though.
QUESTION
I am trying to automatically add multiple model evaluation parameters in lattice
plot. I am using the following code
ANSWER
Answered 2021-Aug-23 at 14:26There are three approaches with lattice. summ
is calculated in (1) as in the question except RMSE
is rmse
in hydroGOF and we add an ann
column which contains the annotations. summ
is also used in (2) and (3). p
in (1) uses the same code as in the question and it is used again without change in (3). All use panel.key
from latticeExtra and (3) also uses layer
from latticeExtra.
1) trellis.focus We can use trellis.focus/trellis.unfocus
to modify panels after the fact.
QUESTION
I recently started learning web scraping. I wanted to have some information about the Job ads in the "Indeed" website. My problem is that when I click on the job name, the site shows the job description on the right side. I want to have access to this part to get information out but I run into this problem every time :
Message: no such element: Unable to locate element: {"method":"css selector","selector":"[id="jobDescriptionText"]"}
I tried other ways , but I couldn't solve it , so How can I get access to that part without getting that Error?
...ANSWER
Answered 2021-Jul-17 at 09:57This id
QUESTION
I'm trying to stitch two pre-warped images together seamlessly using multi-band blending. I have two input images (that have already been warped) and one mask. However, when I apply MBB, the area surrounding the seams glow brighter and as a result, they become more visible which is the opposite of the objective here. I have absolutely no idea what I'm doing wrong.
To better explain the problem, here are the images and the output:
Target:
Source:
Mask:
And once I blend the source image into the target, this is what I get:
Here's my code for reference:
...ANSWER
Answered 2021-Jun-03 at 17:30here's a C++ answer, but the algorithm is easy.
QUESTION
I want to perform the color calibration of my camera. That's why I search demosaic algorithm, which can provide the closest color to color of a real object. That's why I want:
- create synthetic images in OpenCV with known colors
- mosaic it
- pass it in an algorithm for estimation of efficiency
I use libraw for unpacking raw images and OpenCV for processing and storing them.
So, the question is, is there a library that can provide me different demosaic algorithms(i am ready to convert my synthetic image from Mat to C-style array) where I can pass my mosaic image and receive demosaic image. I think that it is possible to convert my image from tiff to dng and use RawTherapee for demosaicing, but it looks more complicated.
...ANSWER
Answered 2021-May-23 at 13:32I solved that problem by using dng sdk.
Pipeline for using class from link in the end of answer is here:
QUESTION
I have some issues trying to sum 15 rasters with these dimensions Col = 53241 rows=45598 cell size =30 meters, data type= float32. I used rasterio to perform this operation but I have a problem with memory. Any suggestions?
Thanks in advance
This the code
...ANSWER
Answered 2021-May-04 at 20:59There are several ways (there are some threads here in Stackoverflow about it) to improve performance and/or memory consumption while read, write and process large rasters. Here an example that uses a library called dask-raster for read/process/write using chunks or window blocks, I like it because its easy to use but you can also implement it in a pure dask:
QUESTION
Section 6.2 of A Layered Grammar of Graphics says the following:
In the grammar, a pie chart is a stacked bar geom drawn in a polar coordinate system.
Similarly, the documentation for ggplot2's coord_polar
says:
...
ANSWER
Answered 2021-Apr-28 at 23:12A spineplot requires two variables, so to plot mtcars$cyl
you need to add another variable, e.g. mtcars$gear
:
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Install Mosaic
Get an array of UIImage instances. This is the image pool that will be used to populate the photo mosaic.
Initialize a Mosaic instance, passing in the UIImage instances created in the previous step.
Finally, call the generate() function on the Mosaic instance previously created, and pass in the image (as a CGImage) that needs to be transformed into a photo mosaic.
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