psd | 这是一个使用 C/C 编写的 功率谱分析 程序。运算部分是纯 C 的，图形使用的是 Qt

I am writing a regular expression that should match some graphic files (non-hidden) So I came up with the following expression

This is the original image:

This is the image after I opened and showed it with Pillow:

The original image is JPEG, but I've tried changing the format to TIFF, PSD, but nothing works. I've tried converting the image to RGB, RGBA, CMYK, and can't see any improvement.

If I simply take a screenshot of the image, and open it in Pillow, the colours are preserved.

Then I thought I might not need Pillow, and I can use another library, and tried OpenCV, but the same thing happened! Same results as the picture above.

As @HansHirse suggested in the comments in my previous question, the post made me realise that when I just saving the image, the colours are preserved. (Though just opening and saving without using the ICC profile produces the exact image anyway.)

I set up prerender.io for CRA and it works well, but when bot hits URL without parameters it puts in the end of URL - string ".var"

I tried variations of (.*) but it seems not working. Any ideas?

Here is .htaccess file

Previously I used File > New > New Module > Import .JAR/.AAR Package

but the option to Import .JAR/.AAR Package from the New Module wizard has been removed on Android Studio 4.2 and following the document which suggests using the Project Structure Dialog reveals no clear answer for importing .AAR module and seems to be outdated

I tried adding the module as a dependency in the project Structure but it did not work

I'm working on some legacy code using R. In the code, frequencies and intensities of a periodogram are extracted and used for some downstream analysis:

I have a timeseries for which I need PSD values using R. The data was sampled at non uniform intervals but I did a spline interpolation with the predict command to interpolate readings at exactly 0.01 seconds. I could obtain amplitude values from spec.pgram quite correctly but they are not psd values. However the psd values from the pspectrum command of the psd package are only between 0 and 0.5Hz while my area of interest extends to about 1.2Hz. The time series is: here

from my knowledge, Power Spectral Density (PSD) should stay relatively constant with the total time sampled (or aka. N-points sampled), however I have having trouble obtaining this result.

As I know from Discrete Fourier Transform (DFT), the amplitude normalization is 1/N. (e.g Amplitude Spectrum = DFT/N). However, from various sources, the PSD is defined as (DFT * DFT-conjugate / N).

How can this be possible? It is true that the Amplitude Spectrum has a 1/N normalization constant, then shouldn't the PSD have a 1/N^2 normalization constant (since DFT is proportional to N and so is its conjugate).

More specifically, I am trying to calcuated the PSD of a continuous electric field wave using the Eq. 9 of this paper. However I can't make sense of it's constants infront of the DFT since the factors of N's cancel out leaving behind only the summation of the window function squared. I tested this result and found that the PSD does not stay relatively constant with sampling size.

In summary, I have having troubles since my PSD varies with the amount of total time of the signal sampled. Any help would be great, thanks!

Good day, I have here a batch file (I call Installer.bat because it installs softwares)

How can I build Ghostscript with ENABLE_TRAPPING?

In docs it says "build with ENABLE_TRAPPING", but what does it mean?

When I execute "make ENABLE_TRAPPING" it returns "no rules for creating target "ENABLE_TRAPPING"" (it's okay).

But when I use "make ENABLE_TRAPPING=1" it compiles good, but the example in docs gs -sDEVICE=psdcmyk -dTrapX=2 -dTrapY=2 -o out.psd -c "<< /TrapOrder [ 4 5 3 1 0 2 ] >> setpagedevice" -f examples/tiger.eps doesn't work: artifacts instead of tiger image.

In addition, when trying to change Makefile (decomment $(PSD)trapping.dev and other actions), make returns compilation errors.

So how can I do it?

Makefile: https://pastebin.com/QVTw5bqK