jpeg format IS a high quality format when created or saved as 12% (or 120 depending on application) - it has the same quality as a BMP or TIF with no compression artifacts
a low quality jpeg cant be made high quality just by converting the file format - the amount of work involved in improving the quality of a highly compressed jpeg usually isn't worth it and you still end up with an inferior image than if you just start out with a high quality image to begin with
when working with jpegs in photoshop or other programs always save as 12 (or 120) and you will get no compression artifacts (those annoying blocks of pixels) - most better digital cameras save jpegs as 8% (or 80), occasionally as 10% (or 100) which is good enough for most uses but be sure anytime you edit the image you save it as 12 so you don't further damage the image
as a digital photographer i shoot exclusively in jpeg format and my camera saves at a 10% compression which makes those pixel squares almost unnoticeable and i never had a complaint about image quality
High resolution for a JPEG image is typically considered to be around 300 pixels per inch (ppi) or higher. This level of resolution ensures that the image is sharp and detailed when viewed on a screen or printed.
To optimize the resolution of your JPEG image for high-quality printing, you should ensure that the image has a resolution of at least 300 pixels per inch (PPI) and is saved in the CMYK color mode. Additionally, make sure the image is saved at the appropriate dimensions for the desired print size to maintain sharpness and clarity.
To obtain a high-quality JPEG image of the document, you can scan it using a scanner or take a high-resolution photograph of it with a good quality camera. Make sure the lighting is good and the document is flat to avoid any distortions. After capturing the image, you can save it as a JPEG file for high quality.
The best JPEG resolution for high-quality digital images is typically 300 pixels per inch (ppi) or higher. This resolution ensures sharpness and clarity in the image when viewed on digital devices or printed.
The optimal JPEG image size for high-quality resolution on a website is typically around 1920 pixels in width and 1080 pixels in height. This size ensures good image quality while also keeping the file size manageable for faster loading times on the web.
High resolution JPEG images are typically considered to be at least 3000 pixels on the longest side, with a resolution of 300 pixels per inch (ppi).
Image > Image Size
Depends for what the image is going to be used. If it's for a high resolution printing such as print ad in a magazine or poster TIFF format with LZW is preferred for quality purpose. JPEG format gives more options for compressing an image, especially for web usages or not for high quality printing purpose. Also it depends on the original image quality and resolution, if the quality of the original image is good, then JPEG will be a good option to use.
Open image in Photoshop then go to Image > Image Size.
The maximum file size for a high-quality JPEG image is typically around 10-12 megabytes.
The number of high-resolution photographs that can fit on a megabyte depends on the image format and compression. For example, a typical high-resolution JPEG image might range from about 1 to 5 megabytes, depending on its dimensions and quality settings. Therefore, on average, you might fit only a fraction of a single high-resolution photo on a megabyte, likely around one image or less. In contrast, lower-resolution images could fit several dozen to hundreds within the same space.
The best way to decrease the resolution of digital artwork is to open it with Adobe Photoshop. Then go to the top of the screen and click Image > Image Size > and change the number in the box labeled "resolution." Be sure that "Resample Image" is checked so that it will discard the extra resolution, rather than reallocating it. Then Save As, and you're done.