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At thumbnail size, image appears clear, at the size on the image page small artifacts can be seen, but at 100% (actual size) the image is heavily artifacted with JPG compression blocks over the entire photograph.
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should not display any of the following technical flaws, unless there are strong mitigating reasons, such as historical significance or unique subject matter: see the
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Stitching errors, white building overexposed, posterisation (probably caused by JPEG compression), slight chromatic aberration, inappropriate file type
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Typically, technical problems in nominated images aren't as blatant as they are in the examples above. Here are some real world case studies.
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of 3D objects such as statues and sculptures. This one's OK - the author died about 170 years ago. Check
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There is no agreed definition of what constitutes a featured picture. However, Knowledge (XXG)
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Knowledge (XXG):Featured picture candidates/Snail climbing grass SMC 07.jpg
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to see whether such derivative works are permitted to be freely licensed.
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Large number of (block-shaped) JPEG artifacts, inappropriate black border
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146:(grain) due to a high sensitivity (ISO) necessitated by poor lighting.
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Knowledge (XXG):Featured picture candidates/Two JFKs For Father's Day
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original image. Loss of detail due to JPEG artifacts and enlargement
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Knowledge (XXG):Featured picture candidates/Oklahoma City memorial
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resulting in unrealistic colors (often incorrectly called
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Noise, subject not entirely in focus (insufficient DOF)
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Knowledge (XXG):Featured picture candidates/Blue
Manakin
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Purple fringing, a form of chromatic aberration. See
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Knowledge (XXG):WIAFP/Examples of technical problems
448:Film grain, out of focus, oversharpened, smallish
108:, main subject partially obscured and out of focus
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334:Poor composition: subject partially obscured
45:gallery for examples of notable exceptions.
231:Right: over-sharpened, with both excessive
18:Knowledge (XXG):What is a featured picture?
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316:Main subject not entirely in focus (
129:Bottom: blown-out areas marked red
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482:Insufficient DOF, JPEG artifacts
348:Even a small tilt is noticeable.
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41:page for guidelines, and the
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365:Unencyclopedic composition
35:featured picture candidates
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104:Over-exposed, undesirable
39:featured picture criteria
223:Example of excessively
384:Be on the lookout for
209:JPEG artifacts closeup
49:Image quality problems
229:Left: original image.
142:Example of excessive
127:Top: original image.
123:Blown-out highlights
352:may fix the issue.
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350:Editing the image
233:colour saturation
22:(Redirected from
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398:In practice
300:composition
144:image noise
106:motion blur
411:Nomination
414:Problems
164:artifacts
87:with low
237:contrast
89:contrast
81:lighting
65:problems
63:lighting
59:contrast
55:Exposure
302:errors
227:image.
408:Image
296:Focus
179:Left:
79:Poor
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266:here
235:and
160:and
83:and
61:and
287:HDR
156:,
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289:)
239:.
26:)
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