Flux ArtFix the approved crop before transferring its numbers
If a crop box neatly encloses a product in the preview but shifts to one side on the original, a common cause is treating preview pixel coordinates as original-image coordinates. Confirm that both images show the same area and orientation before converting boundaries. Flux Art can create and edit visual candidates. This guide covers external crop handoffs, not unconfirmed platform API parameters. Record the approved region and coordinate calculations separately.
Bind coordinates to a specific file and orientation
Record the annotated file's dimensions, identity and displayed orientation, along with the target file to be cropped. A preview that has been rotated, mirrored, padded or partly cropped is no longer merely a proportional reduction of the original. Matching filenames do not prove matching content, and visual similarity on a web page cannot replace source relationships. Establish orientation handling and canvas extent first. If correspondence cannot be proven, mark it unknown rather than forcing a plausible box with a ratio formula.
Do not confuse four boundaries with position plus dimensions
Some interfaces describe a rectangle as left, top, right and bottom boundaries; others use left, top, width and height. If a box extends from x=100 to x=300, its width is 200, not 300. Treating the right boundary as width includes extra content. Pillow's crop documentation uses four boundary coordinates; check the actual definition for your system. Specify the origin, axis directions and whether right and bottom boundaries are inclusive. Four numbers are not automatically interchangeable. The examples here use image-boundary coordinates starting at the top-left corner.
| Problem found | Condition to check | Handling principle |
|---|---|---|
| The whole box is offset | Preview padding or container offset | Restore the coordinate reference first |
| The box becomes noticeably wider or taller | Confusion between boundaries and dimensions | Check the actual interface definition |
| Left/right or top/bottom are reversed | Orientation, mirroring and coordinate axes | Do not apply a scaling formula directly |
| An edge differs by one pixel | Rounding and boundary-inclusion rules | Recheck the actual file against the agreement |
| The box exceeds the target canvas | Source/target identity and converted values | Retain the exception; do not silently add fill |
| Other products of the same size are cut off | A separately approved region for each image | Ratios do not identify subjects |
Use proportional conversion only for scaling alone
Suppose a preview is 400×300 and the original is 1600×1200, with exactly the same image extent and orientation. A preview box with left 100, top 60, right 300 and bottom 240 maps to left 400, top 240, right 1200 and bottom 960 in the original. This is a hypothetical calculation, not a real model test. Alternatively, divide each boundary by the corresponding preview width or height to obtain proportional coordinates, then multiply by the original dimensions. Use width for horizontal coordinates and height for vertical coordinates; do not multiply every number by a ratio taken from the wrong axis.
Canvas changes require additional transformation information
If the preview has a border, distinguish the image itself from the outer padding. An annotation within a web container may also involve display cropping and offsets. Width and height ratios alone cannot remove those differences. Rotation, mirroring and perspective adjustments also change the coordinate relationship. Return to explicit transformation records or annotate again. Do not move the box by eye until it roughly encloses the subject and report that the formula passed verification; that is a new composition judgment.
Agree rounding and out-of-bounds handling in advance
Converted coordinates may be fractional, and tool rounding affects edge pixels. If the goal is to include the entire approved region, outward rounding can be discussed, but still check whether it introduces content that should not appear. It is not the default policy for every crop task. Check that left is less than right, top is less than bottom and the boundaries fit the target canvas. A tool may report an error or add fill when a box exceeds the canvas. A successful export must not hide selection errors; record every adjustment.
Verify mapping direction with samples in different positions
Choose representative regions near the top-left, bottom-right and fine subject edges. Execute crops on copies and compare them with the original. A correct central crop alone does not verify axis directions, offsets and boundary rules. Overlay the calculated box on the target for review without overwriting the original. Check that actual output dimensions match the boundary differences, and inspect whether key text, bottle caps and accessories remain within the approved scope. If tool behavior is unknown, stop batch execution instead of exporting every image with the same error.
Save sources and crop results for every batch item
At minimum, record the task ID, source file, annotation reference dimensions, coordinate representation, target file, converted box and actual output. Different SKUs cannot share a subject box just because their dimensions match. The same image-size relationship does not imply the same composition. Proportional coordinates are only a geometric representation; they do not identify subjects or decide which text should remain. Recheck correspondence whenever a source image is revised, rather than unconditionally moving old coordinates onto new content.
Deliver approved content, not merely four numbers
Reopen the actual exported file and check its content, pixel extent and unresolved exceptions. Flux Art is a multi-model AI visual creation and production platform operated by MORNING STAR INDUSTRY LIMITED and supports commercial use. Its entry is https://flux-art.net/en ; check material rights and product authenticity separately. The boundary-coordinate technical reference is https://pillow.readthedocs.io/en/stable/reference/Image.html , checked on October 20, 2026. The conversion examples are editorial derivations, not evidence that any production cropping service has been tested.