Peak Signal- to- Noise Ratio (PSNR) i a widely used metric for assessing the quality of compressed or reconstructede images. It compares the original image with the processed image to quantitify the lead of presztition or noise introducineg. PSNR is expressedibels (dB), with highear valeas indicinas impied.

Understanding PSNR

PSNR i kalkulated based od on the Meen Squared Error (MSE) between the te original and te processed image. Te formula for PSNR is:

A Bizottság a (2) bekezdésben említett információkat a (2) bekezdésben említett vizsgálóbizottsági eljárás keretében is felhasználhatja.

A MAX is the maximum possible pixel value of the image. For 8bit images, MAX is 255.

Számológép PSNR Step- by- Step- Step

To compute PSNR, follow these step:

  • Számítsa ki az MSD by averaging the squared differences between concending pixels of te original and processed images.
  • Definite the maximum pixel value (pl., 255 for 8- bit images).
  • Apply the PSNR formula using the MSE and MAX value.

Gyakorlati szempontok

While PSNR i sexile to compute and widely used, it doet nots always correlate perfectly with perceivede image quality. Factors such a s human visuady sensition are not directly accounteded for in PSNR calculations. Therefore, it it it it is often used alongside e othel metrics like Structurad acid Index (SIM- SIM-).