Assuming you’re in folder a the following might work for you find . -name “*.jpg” -exec mogrify -format png {} \; You can use the find command to get all the jpg files in all the subfolders and pass your command as an argument to find
There is a program named jpegtran jpegtran – a utility for lossless transcoding between different JPEG formats. To rotate the image losslessly, you can do the following: $ jpegtran -rotate 180 -perfect -outfile rotated.jpg origin.jpg And Here is a list of applications which provide the JPEG lossless rotation feature based on the IJG code
Actually, I’d like turn the problem around, and say I’m surprised that so many different platforms and tools actually produce the same values. 🙂 JPEG is lossy First of all, JPEG is a lossy image compression method. This means that reproducing the exact data of the original is not possible. Or, if you like, several … Read more
JPEG = the compression algorithm (Joint Photographic Experts Group) JFIF = the file format (JPEG File Interchange Format) Effectively when you mention jpeg/jpg you are actually talking about JPEG/JFIF, although there is a spec for JPEG/TIFF and JPEG/EXIF (usually digital photos is where you’ll see these) A lot of the time whatever produces the EXIF … Read more
I have successfully solved the issue. I posted the code to read the tiff files in a folder and convert into jpeg automatically. import os from PIL import Image yourpath = os.getcwd() for root, dirs, files in os.walk(yourpath, topdown=False): for name in files: print(os.path.join(root, name)) if os.path.splitext(os.path.join(root, name))[1].lower() == “.tiff”: if os.path.isfile(os.path.splitext(os.path.join(root, name))[0] + “.jpg”): … Read more
You can use imencode: encode_param = [int(cv2.IMWRITE_JPEG_QUALITY), 90] result, encimg = cv2.imencode(‘.jpg’, img, encode_param) (The default value for IMWRITE_JPEG_QUALITY is 95.) You can decode it back with: decimg = cv2.imdecode(encimg, 1) Snippet from here
Yes you can do this. The JPEG format makes provision for exchangeable image file format Color space definition Component sub-sampling registration Pixel aspect ratio definition JPEG/Exif is the most common for photography and JPEG/JFIF is the most commonly used for storage. When the others state JPEG format doesn’t provide for an alpha channel all they … Read more
No, the JPEG file format has no inherent support for animation. The image you linked is actually an animated GIF disguised with a jpg file extension. (The browser apparently ignores even the MIME type and looks at the file header bytes in such cases.)