I cropped a small area to show the engraving up close. Why does it look soft when the store displays it large?
Because a small area holds few pixels. The cropper takes pixels as they are, with no rescaling, so cropping a 500 × 500 area gives you an image only 500 pixels wide. When the store shows it in a larger space it enlarges it, and it looks soft. Watch the 'Output:' line before you download, and for detail shots, photograph the product up close instead of cropping from afar.
Cropping does not add detail
Picture a ring photographed from a distance at 4000 × 3000, with the engraving taking up a small area in the middle. In the Image cropper you choose 1:1 and shrink the box around the engraving. The preview looks fine because it is small, but the file only contains the pixels the camera captured for that area.
A 4000 × 3000 photo, with the box around the engraving at 500 × 500, starting at X = 1800, Y = 1200.
The downloaded file is exactly 500 × 500, and the 'Output:' line shows that before you download.
If the store shows the image in a space 1000 pixels wide, it enlarges it twice in each direction.
Enlarging twice means each real pixel covers four on screen, and the extra pixels are calculated from their neighbors. Edges soften and the fine lines of the engraving fade, which are exactly the details you wanted to show.
Does resizing fix it?
No. If you open the crop in the Image resizer and enlarge it to 1000 × 1000, the tool warns you that you are upscaling, and the result is about as soft. Enlarging it yourself before uploading is not much different from letting the store enlarge it: no new detail appears either way.
How to tell before you download
- Find out how large the image will be shown. Check your theme settings or inspect the image width on a product page.
- Set the crop box around the detail, then look at the 'Output:' line under the preview.
- If the output width is far below the display width, expect a soft image.
- Widen the box a little to include some of the product around the detail: the pixel count goes up and the shot stays clear.
The real fix: shoot closer
Detail shots need their own photo. Bring the phone close to the engraving or fabric until it fills the frame, with good side lighting to bring out the relief. The detail then spans thousands of pixels instead of hundreds, and you can crop it later to the ratio you want without shrinking it this far.
- If your phone has a telephoto lens or a close-up mode, try it for fine detail.
- Moving closer beats digital zoom: digital zoom enlarges part of the frame, so it cannot add detail either.
- Rest the phone on a stand or a surface, because shake loses detail faster than anything else.
Common questions
Does the cropper lower the resolution?
No. The cropped area keeps its original pixels with no rescaling; the issue is how few there are, not the crop.
Why did the preview look sharp?
The preview is shown small, so the lack of pixels only shows when the image is displayed large.
Does PNG help here?
PNG prevents any extra loss from compression, but it does not add pixels.