6 Replies Latest reply on Oct 22, 2017 9:30 AM by HAZFEA67

    Raw to Jpeg - Poor Image Quality

    HAZFEA67

      Hi everyone,

       

      I have just started entering our local camera club competitions and had a little success, but I have a problem converting 16 Bit Raw files taken on my D810 to Jpegs.

      The images look sharp when I'm in Raw (image size example 6353 x 4240px) but when I change the image size in Photoshop to the clubs guideline of 1400 x 1050px they look very very blurred?

      I understand that I'm trying to compress a lot of data, but is this normal?

        • 1. Re: Raw to Jpeg - Poor Image Quality
          Test Screen Name Most Valuable Participant

          Changing (reducing) image size does not cause blurring on an ordinary photo. Saving as JPEG might, depending on your quality settings. When do you see the blurring? After resizing, or after saving the JPEG and reopening it? What JPEG settings do you use?

          • 2. Re: Raw to Jpeg - Poor Image Quality
            Stephen_A_Marsh Adobe Community Professional

            Generally speaking, interpolation from a higher resolution to a lower will slightly soften an image. There are different options when resizing, what method are you using? Some methods include a sharpening effect built into the interpolation method, or you may choose to apply unsharp mask or smart sharpen as a separate step after resizing. If your high resolution images contain repeating patterns, they can sometimes benefit from a slight blur before resizing down and then sharpening – it all depends on the image.

            • 3. Re: Raw to Jpeg - Poor Image Quality
              Derek Cross Adobe Community Professional

              Don't compress below 8 and also make sure you're not looking at them at above 100%.

              • 4. Re: Raw to Jpeg - Poor Image Quality
                HAZFEA67 Level 1

                Thank you for the replies.

                It occurs after re-sizing even though I save Jpegs at the maximum setting of 12 and use the Baseline setting.

                Maybe I'm expecting too much as I am looking at them at 100% as I do my Raw images. The most affected ones are of a Meadow so it is quite a busy photograph (flowers/grasses).

                Someone mentioned a "softening" of the image after re-sizing, I think that is a more accurate description than blurring.

                • 5. Re: Raw to Jpeg - Poor Image Quality
                  Per Berntsen Adobe Community Professional

                  First of all, your original image (6353 x 4240) has an aspect ratio of 1.5, and if you're resizing it to 1400 x 1050 (aspect ratio 1.33), you will be distorting the image, unless you cropped it first to a 1.33 aspect ratio.

                   

                  For good sharpness, I suggest this workflow:

                  With the raw file open in Camera Raw, make sure that it has received proper sharpening in the Detail tab. The sharpening you do here is called Capture sharpening, and is meant to compensate for softness in the digital capture. Always apply sharpening at 1:1, any other view will be inaccurate and misleading because of image scaling.

                  The image should look sharp, but not too sharp. Too much sharpening looks worse than too little, so if in doubt, sharpen less.

                   

                  Now click the workflow options (underlined text) at the bottom of the screen.

                  This allows you to resize the image, to apply output sharpening (which is designed to compensate for the sharpness loss cause by resizing), and to choose a color profile. Try the settings in the screenshot below. Note that the resized image will be 1400 x 934.

                  When the image opens in Photoshop, save it as a jpg.

                   

                  Workflow-sharpen.png

                  • 6. Re: Raw to Jpeg - Poor Image Quality
                    HAZFEA67 Level 1

                    Thank you so much for taking the time to give me such a detailed workflow and the good news is it my image is much sharper.

                    I really appreciate all your responses to my dilema.