

I think that Alamy (the photo agency) have just about the best and simplest explanation of how to prepare high quality images and you may want to have a lookĪmbient troutmask (a group admin) edited this topic ages ago. Make sure that you either apply no or minimum sharpening as sharpening not only produces larger file sizes but also produces more artifacts when compressed. The image at 125K will usually have an uncompressed file size of around 1 Mb when opened in PS or other applications. 80% and above should all look fine on the screen, however artifacts are produced below 95%. The compressed file size is depedent on many factors within the image itself.the nore detail the more you will need to compress, you may need 90% to ge tto the size they suggest. It seems they have only suggested a compressed file size (125K) so the uncompressed file size can be considerably larger. With lightroom a compression factor of a jpg of 90% or 10 and above in Photoshop will give the smallest compressed file size whilst avoiding visable artifacts. However the actual size of the image is defined by its measurements in pixals and its compression factor. Usually two sizes one as a uncompressed jpg and one as a compressed jpg. Those that understand digital images will specify a file size. The fact that the competition organizers specify a dpi or ppi just shows their ignorance about digital images. Ppi or dpi are completely irreverent until you come to print. In the end much the same, but the competition has referred to the wrong thing!
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Ppi (pixels per inch) = related to file/viewing resolution its a silhouette and the outline of the subject was what turned pixelated.ĭpi (dots per inch) = related to printing resolution When I opened in explorer the image was pretty pixelated. I was originally exporting at quality 100 but I'll fiddle. So I would fiddle with the quality until you get the max quality that is acceptable to them.

I chose a lower quality (I think 60) and it came out to be 107K. I exported an image at 640x480 at the default "quality" (80) and it was 204K. But at 1-1 on your screen it should look OK. 640x480 is not very big and can't be used for very much but looking at on the screen, but I presume the winners will be asked for a larger image. I don't know why your photo would look terrible. That's the only way you can vary the jpg size for a particular picture if the width and height are fixed. You didn't say what you set for "quality". When I view the above export in explorer, the file size is 159kb and the quality looks terrible. Is 72 ppi ok?Īnd when I plug in the dimensions, I check the 'resize to fit' box and choose 'width&heigth' and then enter 640 x 480 pixels. I just can't seem to get to this file/image size.įor the resolution of 72 dpi, LR only gives a ppi option. The maximum file size is 125K each image size up to 640 x 480 pixels and resolution of 72 dpi.
#Easybatchphoto mac update
