{ "schemaVersion": 1, "checkedAt": "2026-10-17 Asia/Shanghai", "publicCopy": { "basenameOnly": true, "description": "Complete actual output observations with staged input facts. Initial preparation product0/outputsfalse flags are omitted, not presented as current state.", "sourceIsDownloadOnly": true }, "nativeBytesUnmodified": true, "inputVerification": { "checks": 20, "passed": 20, "failed": 0 }, "primaryVerification": { "checks": 66, "passed": 66, "failed": 0 }, "independentVerification": { "checks": 43, "passed": 43, "failed": 0 }, "verificationCountsKeptSeparate": true, "inputFacts": { "schemaVersion": 1, "inputFile": "synthetic-vector.svg", "bytes": 2363, "sha256": "4a34ac6ee42701655d3e341314c9aa1b6da26fe30ca752e79852662a85456731", "mime": "image/svg+xml", "encoding": "UTF-8", "logicalDimensions": { "width": 640, "height": 400, "viewBox": [ 0, 0, 640, 400 ] }, "structure": { "elementCounts": { "svg": 1, "title": 1, "desc": 1, "defs": 1, "linearGradient": 1, "stop": 3, "rect": 5, "path": 8, "circle": 1 }, "ids": [ "qa-gradient", "corner-a", "label-a", "corner-b", "label-b", "corner-c", "label-c", "corner-d", "label-d", "gradient-panel", "direction-arrow", "translucent-circle", "triangle", "fine-lines", "step-line" ], "fontDependency": false, "cornerLabels": "A red top-left, B green top-right, C blue bottom-right, D purple bottom-left; every letter is a vector path, no system text/font.", "internalPaintReference": "url(#qa-gradient) refers to the local linearGradient ID only.", "transparentGeometryFacts": { "noOverallBackground": true, "outerMarginLogicalUnits": 16, "topRightStrip": { "x": 600, "y": 0, "width": 40, "height": 16, "noAuthoredPaintObjectIntersects": true }, "scope": "These are authored vector-space geometry facts. Actual alpha pixels, edge antialiasing, output dimensions and color fidelity require real conversion outputs." } }, "inputChecks": { "checks": 20, "passed": 20, "failed": 0, "records": [ { "check": "no-DTD-or-entity-declarations", "actual": false, "expected": false, "passed": true }, { "check": "root-svg", "actual": "svg", "expected": "svg", "passed": true }, { "check": "explicit-width", "actual": "640", "expected": "640", "passed": true }, { "check": "explicit-height", "actual": "400", "expected": "400", "passed": true }, { "check": "explicit-viewBox", "actual": "0 0 640 400", "expected": "0 0 640 400", "passed": true }, { "check": "safe-basic-vector-elements", "actual": [], "expected": [], "passed": true }, { "check": "no-script-foreignObject-image-text-font-use", "actual": [], "expected": [], "passed": true }, { "check": "no-event-handlers", "actual": [], "expected": [], "passed": true }, { "check": "no-href-anywhere", "actual": [], "expected": [], "passed": true }, { "check": "no-external-resource-values", "actual": [], "expected": [], "passed": true }, { "check": "only-internal-gradient-paint", "actual": [ "url(#qa-gradient)" ], "expected": [ "url(#qa-gradient)" ], "passed": true }, { "check": "ids-unique", "actual": 15, "expected": 15, "passed": true }, { "check": "gradient-definition-present", "actual": "linearGradient", "expected": "linearGradient", "passed": true }, { "check": "label-a-is-font-free-path", "actual": "path", "expected": "path", "passed": true }, { "check": "label-b-is-font-free-path", "actual": "path", "expected": "path", "passed": true }, { "check": "label-c-is-font-free-path", "actual": "path", "expected": "path", "passed": true }, { "check": "label-d-is-font-free-path", "actual": "path", "expected": "path", "passed": true }, { "check": "no-background-covering-transparent-outer-margin", "actual": false, "expected": false, "passed": true }, { "check": "top-right-transparent-strip-authored", "actual": "24", "expected": "24", "passed": true }, { "check": "bottom-corner-shapes-max-y", "actual": 376.0, "expected": 376.0, "passed": true } ] }, "sourceProvenance": "Entirely self-authored basic vector geometry; no user pictures, external assets, font, scripts or real metadata." }, "primaryObservation": { "schemaVersion": 1, "date": "2026-10-17", "status": "passed", "method": "Pillow 12.3.0 decoding of unchanged real product JPEG/PNG; explicit JPEG header inspection. Source SVG is parsed for dimensions only, never locally rasterized for comparison.", "source": { "file": "synthetic-vector.svg", "bytes": 2363, "sha256": "4a34ac6ee42701655d3e341314c9aa1b6da26fe30ca752e79852662a85456731" }, "outputs": [ { "file": "jpeg-native.jpg", "bytes": 24130, "sha256": "7d0d15416962e7f8b5b4599615a030c59c5dbfe5db7a3f0282b45b50c3d7d500", "format": "JPEG", "width": 640, "height": 400, "mode": "RGB" }, { "file": "png-native.png", "bytes": 125295, "sha256": "c6654f9e1c485ee77783b36ce20086e2d7a3163043c7011b770a524f1668e8b8", "format": "PNG", "width": 640, "height": 400, "mode": "RGBA" } ], "nativeOperations": { "fixtureUploads": 1, "inputFiles": 1, "conversionRuns": 2, "outputFormats": [ "JPEG", "PNG" ], "singleImageDownloads": 2, "nativeZipDownloads": 0, "keepExif": true }, "mainChecks": { "checks": 66, "passed": 66, "failed": 0, "records": [ { "check": "unchanged-known-input-sha256", "actual": "4a34ac6ee42701655d3e341314c9aa1b6da26fe30ca752e79852662a85456731", "expected": "4a34ac6ee42701655d3e341314c9aa1b6da26fe30ca752e79852662a85456731", "passed": true }, { "check": "receipt-fixtureUploads", "actual": 1, "expected": 1, "passed": true }, { "check": "receipt-inputFiles", "actual": 1, "expected": 1, "passed": true }, { "check": "receipt-conversionRuns", "actual": 2, "expected": 2, "passed": true }, { "check": "receipt-singleImageDownloads", "actual": 2, "expected": 2, "passed": true }, { "check": "receipt-nativeZipDownloads", "actual": 0, "expected": 0, "passed": true }, { "check": "receipt-keepExif", "actual": true, "expected": true, "passed": true }, { "check": "receipt-outputFormats", "actual": [ "JPEG", "PNG" ], "expected": [ "JPEG", "PNG" ], "passed": true }, { "check": "receipt-uniqueFreshOwnDownloadsVerified", "actual": true, "expected": true, "passed": true }, { "check": "receipt-originalOutputFormatRestoredJpegWithoutThirdRun", "actual": true, "expected": true, "passed": true }, { "check": "receipt-ownToolTabClosedAfterReceipt", "actual": true, "expected": true, "passed": true }, { "check": "jpeg-native.jpg-decoder-verify", "actual": true, "expected": true, "passed": true }, { "check": "jpeg-native.jpg-actual-format", "actual": "JPEG", "expected": "JPEG", "passed": true }, { "check": "jpeg-native.jpg-decoded-mode", "actual": "RGB", "expected": "RGB", "passed": true }, { "check": "jpeg-native.jpg-dimensions-match-explicit-input", "actual": [ 640, 400 ], "expected": [ 640, 400 ], "passed": true }, { "check": "jpeg-native.jpg-not-animated", "actual": false, "expected": false, "passed": true }, { "check": "png-native.png-decoder-verify", "actual": true, "expected": true, "passed": true }, { "check": "png-native.png-actual-format", "actual": "PNG", "expected": "PNG", "passed": true }, { "check": "png-native.png-decoded-mode", "actual": "RGBA", "expected": "RGBA", "passed": true }, { "check": "png-native.png-dimensions-match-explicit-input", "actual": [ 640, 400 ], "expected": [ 640, 400 ], "passed": true }, { "check": "png-native.png-not-animated", "actual": false, "expected": false, "passed": true }, { "check": "png-alpha-range", "actual": [ 0, 255 ], "expected": [ 0, 255 ], "passed": true }, { "check": "png-has-fullyTransparent", "actual": true, "expected": true, "passed": true }, { "check": "png-has-fullyOpaque", "actual": true, "expected": true, "passed": true }, { "check": "png-has-partiallyTransparent", "actual": true, "expected": true, "passed": true }, { "check": "png-content-boundary", "actual": [ 24, 24, 616, 376 ], "expected": [ 24, 24, 616, 376 ], "passed": true }, { "check": "png-top16-fully-transparent", "actual": [ 0, 0 ], "expected": [ 0, 0 ], "passed": true }, { "check": "jpeg-top16-near-white-mean", "actual": true, "expected": true, "passed": true }, { "check": "png-bottom16-fully-transparent", "actual": [ 0, 0 ], "expected": [ 0, 0 ], "passed": true }, { "check": "jpeg-bottom16-near-white-mean", "actual": true, "expected": true, "passed": true }, { "check": "png-left16-fully-transparent", "actual": [ 0, 0 ], "expected": [ 0, 0 ], "passed": true }, { "check": "jpeg-left16-near-white-mean", "actual": true, "expected": true, "passed": true }, { "check": "png-right16-fully-transparent", "actual": [ 0, 0 ], "expected": [ 0, 0 ], "passed": true }, { "check": "jpeg-right16-near-white-mean", "actual": true, "expected": true, "passed": true }, { "check": "png-topRight40x16-fully-transparent", "actual": [ 0, 0 ], "expected": [ 0, 0 ], "passed": true }, { "check": "jpeg-topRight40x16-near-white-mean", "actual": true, "expected": true, "passed": true }, { "check": "png-corner-A-fill-sample", "actual": [ 220, 52, 66, 255 ], "expected": [ 220, 52, 66, 255 ], "passed": true }, { "check": "png-corner-A-white-path-sample", "actual": [ 255, 255, 255, 255 ], "expected": [ 255, 255, 255, 255 ], "passed": true }, { "check": "jpeg-corner-A-fill-near-authored-color", "actual": true, "expected": true, "passed": true }, { "check": "jpeg-corner-A-light-path-sample", "actual": true, "expected": true, "passed": true }, { "check": "png-corner-B-fill-sample", "actual": [ 19, 142, 105, 255 ], "expected": [ 19, 142, 105, 255 ], "passed": true }, { "check": "png-corner-B-white-path-sample", "actual": [ 255, 255, 255, 255 ], "expected": [ 255, 255, 255, 255 ], "passed": true }, { "check": "jpeg-corner-B-fill-near-authored-color", "actual": true, "expected": true, "passed": true }, { "check": "jpeg-corner-B-light-path-sample", "actual": true, "expected": true, "passed": true }, { "check": "png-corner-C-fill-sample", "actual": [ 32, 117, 198, 255 ], "expected": [ 32, 117, 198, 255 ], "passed": true }, { "check": "png-corner-C-white-path-sample", "actual": [ 255, 255, 255, 255 ], "expected": [ 255, 255, 255, 255 ], "passed": true }, { "check": "jpeg-corner-C-fill-near-authored-color", "actual": true, "expected": true, "passed": true }, { "check": "jpeg-corner-C-light-path-sample", "actual": true, "expected": true, "passed": true }, { "check": "png-corner-D-fill-sample", "actual": [ 139, 69, 183, 255 ], "expected": [ 139, 69, 183, 255 ], "passed": true }, { "check": "png-corner-D-white-path-sample", "actual": [ 255, 255, 255, 255 ], "expected": [ 255, 255, 255, 255 ], "passed": true }, { "check": "jpeg-corner-D-fill-near-authored-color", "actual": true, "expected": true, "passed": true }, { "check": "jpeg-corner-D-light-path-sample", "actual": true, "expected": true, "passed": true }, { "check": "png-gradient-samples-opaque", "actual": true, "expected": true, "passed": true }, { "check": "png-gradient-samples-not-flat", "actual": 7, "expected": 7, "passed": true }, { "check": "png-gradient-top-row-red-decreases", "actual": true, "expected": true, "passed": true }, { "check": "png-gradient-top-row-blue-increases", "actual": true, "expected": true, "passed": true }, { "check": "jpeg-jfif-header-count", "actual": 1, "expected": 1, "passed": true }, { "check": "jpeg-jfif-version", "actual": [ 1, 1 ], "expected": [ 1, 1 ], "passed": true }, { "check": "jpeg-jfif-density-unit-is-unspecified", "actual": 0, "expected": 0, "passed": true }, { "check": "jpeg-jfif-density-ratio", "actual": [ 1, 1 ], "expected": [ 1, 1 ], "passed": true }, { "check": "jpeg-icc-app2-segment-count", "actual": 1, "expected": 1, "passed": true }, { "check": "jpeg-icc-profile-length", "actual": 456, "expected": 456, "passed": true }, { "check": "jpeg-no-exif-app1-in-this-output", "actual": 0, "expected": 0, "passed": true }, { "check": "png-no-icc-in-decoder-info", "actual": false, "expected": false, "passed": true }, { "check": "png-no-exif-in-decoder-info", "actual": false, "expected": false, "passed": true }, { "check": "native-jpeg-differs-from-white-composited-native-png", "actual": true, "expected": true, "passed": true } ] }, "separateInputChecks": { "source": "fixture-manifest.json", "checks": 20, "passed": 20, "failed": 0, "includedInMainCount": false, "scope": "Archived preparation-only XML checks; productOperationsPerformed=0 and realOutputsPresent=false describe that preparation stage, not this completed native run." }, "pngAlpha": { "range": [ 0, 255 ], "counts": { "fullyTransparent": 132216, "fullyOpaque": 123576, "partiallyTransparent": 208 }, "decodedRgbaSha256": "e43de38152a5348d3465ae41a53b52910d3ce0631f216791d6a2de32cbde2474", "histogram": { "0": 132216, "64": 44, "128": 88, "191": 76, "255": 123576 }, "contentBoundingBox": [ 24, 24, 616, 376 ], "scope": "Half-opacity circle overlays an opaque gradient panel; its interior is composited and remains alpha255. The 208 partial-alpha pixels are boundary observations, not proof of all SVG opacity behavior." }, "transparentBoundaryAndJpegWhiteBackground": [ { "region": "top16", "box": [ 0, 0, 640, 16 ], "pngAlphaExtrema": [ 0, 0 ], "jpegRgbExtrema": [ [ 251, 255 ], [ 254, 255 ], [ 253, 255 ] ], "jpegRgbMean": [ 254.996875, 254.99921875, 254.9984375 ] }, { "region": "bottom16", "box": [ 0, 384, 640, 400 ], "pngAlphaExtrema": [ 0, 0 ], "jpegRgbExtrema": [ [ 254, 255 ], [ 254, 255 ], [ 253, 255 ] ], "jpegRgbMean": [ 254.99921875, 254.99970703125, 254.9974609375 ] }, { "region": "left16", "box": [ 0, 0, 16, 400 ], "pngAlphaExtrema": [ 0, 0 ], "jpegRgbExtrema": [ [ 251, 255 ], [ 254, 255 ], [ 253, 255 ] ], "jpegRgbMean": [ 254.99578125, 254.9990625, 254.9953125 ] }, { "region": "right16", "box": [ 624, 0, 640, 400 ], "pngAlphaExtrema": [ 0, 0 ], "jpegRgbExtrema": [ [ 252, 255 ], [ 254, 255 ], [ 253, 255 ] ], "jpegRgbMean": [ 254.9978125, 254.99859375, 254.99875 ] }, { "region": "topRight40x16", "box": [ 600, 0, 640, 16 ], "pngAlphaExtrema": [ 0, 0 ], "jpegRgbExtrema": [ [ 252, 255 ], [ 254, 255 ], [ 255, 255 ] ], "jpegRgbMean": [ 254.9921875, 254.9984375, 255.0 ] } ], "cornerColorAndPathSamples": [ { "label": "A", "position": "top-left", "fillSampleAt": [ 30, 50 ], "pathSampleAt": [ 55, 40 ], "authoredFillRgb": [ 220, 52, 66 ], "pngFillRgba": [ 220, 52, 66, 255 ], "pngPathRgba": [ 255, 255, 255, 255 ], "jpegFillRgb": [ 220, 52, 67 ], "jpegPathRgb": [ 255, 251, 255 ] }, { "label": "B", "position": "top-right", "fillSampleAt": [ 558, 50 ], "pathSampleAt": [ 568, 45 ], "authoredFillRgb": [ 19, 142, 105 ], "pngFillRgba": [ 19, 142, 105, 255 ], "pngPathRgba": [ 255, 255, 255, 255 ], "jpegFillRgb": [ 20, 142, 105 ], "jpegPathRgb": [ 255, 254, 255 ] }, { "label": "C", "position": "bottom-right", "fillSampleAt": [ 558, 340 ], "pathSampleAt": [ 570, 344 ], "authoredFillRgb": [ 32, 117, 198 ], "pngFillRgba": [ 32, 117, 198, 255 ], "pngPathRgba": [ 255, 255, 255, 255 ], "jpegFillRgb": [ 34, 116, 198 ], "jpegPathRgb": [ 255, 254, 253 ] }, { "label": "D", "position": "bottom-left", "fillSampleAt": [ 30, 340 ], "pathSampleAt": [ 41, 340 ], "authoredFillRgb": [ 139, 69, 183 ], "pngFillRgba": [ 139, 69, 183, 255 ], "pngPathRgba": [ 255, 255, 255, 255 ], "jpegFillRgb": [ 139, 69, 183 ], "jpegPathRgb": [ 255, 253, 255 ] } ], "gradientSamples": [ { "at": [ 140, 100 ], "pngRgba": [ 232, 222, 148, 255 ], "jpegRgb": [ 232, 223, 148 ] }, { "at": [ 200, 100 ], "pngRgba": [ 203, 220, 160, 255 ], "jpegRgb": [ 203, 221, 161 ] }, { "at": [ 260, 100 ], "pngRgba": [ 174, 218, 173, 255 ], "jpegRgb": [ 175, 218, 173 ] }, { "at": [ 380, 100 ], "pngRgba": [ 116, 214, 199, 255 ], "jpegRgb": [ 116, 214, 201 ] }, { "at": [ 440, 100 ], "pngRgba": [ 121, 202, 209, 255 ], "jpegRgb": [ 122, 202, 209 ] }, { "at": [ 500, 100 ], "pngRgba": [ 126, 189, 218, 255 ], "jpegRgb": [ 126, 190, 218 ] }, { "at": [ 500, 300 ], "pngRgba": [ 138, 165, 238, 255 ], "jpegRgb": [ 138, 164, 238 ] } ], "metadata": { "jpeg": { "jfifVersion": [ 1, 1 ], "jfifDensityUnit": 0, "jfifDensity": [ 1, 1 ], "jfifMeaning": "Unit0 means unspecified physical units/pixel aspect ratio, not 1DPI or a selectable DPI setting.", "iccApp2PayloadBytes": [ 470 ], "iccProfileBytes": 456, "iccProfileSha256": "12afb4d9953adee0607d347daee5b78b18d6b3cab2d572b88970703f5edb37bc", "exifApp1Count": 0 }, "png": { "pillowInfoKeys": [], "iccProfilePresent": false, "exifPresent": false } }, "outputToOutputPixelObservation": { "reference": "Local in-memory white composite of unchanged png-native.png; not product output or SVG render", "comparedWith": "jpeg-native.jpg", "rgbChannelMeanAbsoluteError": [ 1.1202890625, 0.64512109375, 1.11176171875 ], "overallMeanAbsoluteError": 0.9590572916666668, "maxAbsoluteChannelError": 61, "differentRgbPixels": 132414, "totalPixels": 256000, "interpretation": "Numerical observation between two native products after white composition; no lossless, source pixel identity, perceptual score or arbitrary-SVG guarantee." }, "observations": [ "Both native downloads are 640×400 pixels, matching this SVG's explicit width/height. Its four corner labels and transparent border remain in place; no automatic crop was observed in this one case.", "PNG retains full-transparent outer areas and anti-aliased edges. JPEG is RGB without alpha and displays a near-white background in those areas; JPEG ringing means some edge/background samples are not 255.", "All four authored corner fills and white vector-path letters are present at selected positions, and sampled gradient colors vary across the panel. These limited samples do not establish full rasterizer precision.", "The UI receipt reports no output-size controls visible. No DPI or arbitrary output width/height was configured." ], "unmeasured": [ "SVG text, font substitution, embedded/external fonts", "External resources, images, CSS, filters, masks, animation, scripts or foreignObject", "Absent or relative width/height, viewBox-only dimensions, DPI and custom target size", "Arbitrary SVG, browser differences, batch/ZIP behavior", "Source-to-output pixel identity, lossless conversion, re-editable vector structure", "EXIF preservation/removal semantics for SVG without EXIF" ], "independentVerification": "independent-output-checks.json; separate checker/count, not added to mainChecks" }, "independentObservation": { "schemaVersion": 1, "date": "2026-10-17", "status": "passed", "method": "Independent Python standard-library parser: PNG chunk bounds/CRCs, zlib scanlines and PNG filters reconstruct every RGBA pixel; JPEG pre-SOS headers only. Does not import Pillow, main verifier or its report.", "sources": [ { "file": "png-native.png", "bytes": 125295, "sha256": "c6654f9e1c485ee77783b36ce20086e2d7a3163043c7011b770a524f1668e8b8" }, { "file": "jpeg-native.jpg", "bytes": 24130, "sha256": "7d0d15416962e7f8b5b4599615a030c59c5dbfe5db7a3f0282b45b50c3d7d500" } ], "independentChecks": { "checks": 43, "passed": 43, "failed": 0, "records": [ { "check": "PNG-signature", "observed": "89504e470d0a1a0a", "expected": "89504e470d0a1a0a", "passed": true }, { "check": "native-PNG-identity", "observed": "c6654f9e1c485ee77783b36ce20086e2d7a3163043c7011b770a524f1668e8b8", "expected": "c6654f9e1c485ee77783b36ce20086e2d7a3163043c7011b770a524f1668e8b8", "passed": true }, { "check": "native-JPEG-identity", "observed": "7d0d15416962e7f8b5b4599615a030c59c5dbfe5db7a3f0282b45b50c3d7d500", "expected": "7d0d15416962e7f8b5b4599615a030c59c5dbfe5db7a3f0282b45b50c3d7d500", "passed": true }, { "check": "PNG-all-chunk-CRCs-valid", "observed": [], "expected": [], "passed": true }, { "check": "PNG-file-ends-at-IEND", "observed": 125295, "expected": 125295, "passed": true }, { "check": "PNG-first-chunk-IHDR", "observed": "IHDR", "expected": "IHDR", "passed": true }, { "check": "PNG-last-chunk-empty-IEND", "observed": { "type": "IEND", "payloadBytes": 0 }, "expected": { "type": "IEND", "payloadBytes": 0 }, "passed": true }, { "check": "PNG-exact-dimensions", "observed": [ 640, 400 ], "expected": [ 640, 400 ], "passed": true }, { "check": "PNG-8-bit-RGBA", "observed": [ 8, 6 ], "expected": [ 8, 6 ], "passed": true }, { "check": "PNG-baseline-compression-filtering-no-interlace", "observed": [ 0, 0, 0 ], "expected": [ 0, 0, 0 ], "passed": true }, { "check": "PNG-only-IHDR-IDAT-IEND", "observed": [ "IDAT", "IEND", "IHDR" ], "expected": [ "IDAT", "IEND", "IHDR" ], "passed": true }, { "check": "PNG-no-ICC-EXIF-DPI-metadata-chunks", "observed": [], "expected": [], "passed": true }, { "check": "PNG-inflated-scanline-length", "observed": 1024400, "expected": 1024400, "passed": true }, { "check": "PNG-all-rows-decoded", "observed": 400, "expected": 400, "passed": true }, { "check": "PNG-decoded-pixel-byte-length", "observed": 1024000, "expected": 1024000, "passed": true }, { "check": "PNG-exact-alpha-histogram", "observed": { "0": 132216, "64": 44, "128": 88, "191": 76, "255": 123576 }, "expected": { "0": 132216, "64": 44, "128": 88, "191": 76, "255": 123576 }, "passed": true }, { "check": "PNG-alpha-bounding-box", "observed": [ 24, 24, 616, 376 ], "expected": [ 24, 24, 616, 376 ], "passed": true }, { "check": "PNG-top16-all-alpha-zero", "observed": true, "expected": true, "passed": true }, { "check": "PNG-bottom16-all-alpha-zero", "observed": true, "expected": true, "passed": true }, { "check": "PNG-left16-all-alpha-zero", "observed": true, "expected": true, "passed": true }, { "check": "PNG-right16-all-alpha-zero", "observed": true, "expected": true, "passed": true }, { "check": "PNG-topRight40x16-all-alpha-zero", "observed": true, "expected": true, "passed": true }, { "check": "PNG-A-fill-pixel", "observed": [ 220, 52, 66, 255 ], "expected": [ 220, 52, 66, 255 ], "passed": true }, { "check": "PNG-A-path-pixel", "observed": [ 255, 255, 255, 255 ], "expected": [ 255, 255, 255, 255 ], "passed": true }, { "check": "PNG-B-fill-pixel", "observed": [ 19, 142, 105, 255 ], "expected": [ 19, 142, 105, 255 ], "passed": true }, { "check": "PNG-B-path-pixel", "observed": [ 255, 255, 255, 255 ], "expected": [ 255, 255, 255, 255 ], "passed": true }, { "check": "PNG-C-fill-pixel", "observed": [ 32, 117, 198, 255 ], "expected": [ 32, 117, 198, 255 ], "passed": true }, { "check": "PNG-C-path-pixel", "observed": [ 255, 255, 255, 255 ], "expected": [ 255, 255, 255, 255 ], "passed": true }, { "check": "PNG-D-fill-pixel", "observed": [ 139, 69, 183, 255 ], "expected": [ 139, 69, 183, 255 ], "passed": true }, { "check": "PNG-D-path-pixel", "observed": [ 255, 255, 255, 255 ], "expected": [ 255, 255, 255, 255 ], "passed": true }, { "check": "PNG-gradient-samples-all-distinct", "observed": 7, "expected": 7, "passed": true }, { "check": "PNG-gradient-samples-all-opaque", "observed": true, "expected": true, "passed": true }, { "check": "JPEG-SOI", "observed": "ffd8", "expected": "ffd8", "passed": true }, { "check": "JPEG-EOI", "observed": "ffd9", "expected": "ffd9", "passed": true }, { "check": "JPEG-three-component-640x400-frame", "observed": [ { "precision": 8, "height": 400, "width": 640, "components": 3 } ], "expected": [ { "precision": 8, "height": 400, "width": 640, "components": 3 } ], "passed": true }, { "check": "JPEG-JFIF-single-header", "observed": 1, "expected": 1, "passed": true }, { "check": "JPEG-JFIF-unit0-ratio1x1", "observed": [ 1, 1, 0, 0, 1, 0, 1 ], "expected": [ 1, 1, 0, 0, 1, 0, 1 ], "passed": true }, { "check": "JPEG-ICC-single-APP2", "observed": 1, "expected": 1, "passed": true }, { "check": "JPEG-ICC-sequence1-of1", "observed": [ 1, 1 ], "expected": [ 1, 1 ], "passed": true }, { "check": "JPEG-ICC-actual-and-declared-length", "observed": [ 456, 456 ], "expected": [ 456, 456 ], "passed": true }, { "check": "JPEG-ICC-acsp-signature", "observed": "acsp", "expected": "acsp", "passed": true }, { "check": "JPEG-no-EXIF-APP1", "observed": 0, "expected": 0, "passed": true }, { "check": "JPEG-SOS-present", "observed": "DA", "expected": "DA", "passed": true } ] }, "png": { "width": 640, "height": 400, "bitDepth": 8, "colorType": 6, "chunks": [ { "type": "IHDR", "payloadBytes": 13 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 4096 }, { "type": "IDAT", "payloadBytes": 1980 }, { "type": "IDAT", "payloadBytes": 6 }, { "type": "IEND", "payloadBytes": 0 } ], "chunkCrcFailures": [], "rowFilters": { "2": 400 }, "decodedRgbaSha256": "e43de38152a5348d3465ae41a53b52910d3ce0631f216791d6a2de32cbde2474", "alphaHistogram": { "0": 132216, "64": 44, "128": 88, "191": 76, "255": 123576 }, "alphaBoundingBox": [ 24, 24, 616, 376 ], "gradientSamples": [ { "at": [ 140, 100 ], "rgba": [ 232, 222, 148, 255 ] }, { "at": [ 200, 100 ], "rgba": [ 203, 220, 160, 255 ] }, { "at": [ 260, 100 ], "rgba": [ 174, 218, 173, 255 ] }, { "at": [ 380, 100 ], "rgba": [ 116, 214, 199, 255 ] }, { "at": [ 440, 100 ], "rgba": [ 121, 202, 209, 255 ] }, { "at": [ 500, 100 ], "rgba": [ 126, 189, 218, 255 ] }, { "at": [ 500, 300 ], "rgba": [ 138, 165, 238, 255 ] } ] }, "jpeg": { "preSosMarkers": [ { "markerHex": "E0", "payloadBytes": 14 }, { "markerHex": "E2", "payloadBytes": 470 }, { "markerHex": "DB", "payloadBytes": 65 }, { "markerHex": "DB", "payloadBytes": 65 }, { "markerHex": "C0", "payloadBytes": 15 }, { "markerHex": "C4", "payloadBytes": 27 }, { "markerHex": "C4", "payloadBytes": 91 }, { "markerHex": "C4", "payloadBytes": 26 }, { "markerHex": "C4", "payloadBytes": 75 }, { "markerHex": "DA", "payloadBytes": 10 } ], "frameHeaders": [ { "precision": 8, "height": 400, "width": 640, "components": 3 } ], "iccApp2PayloadBytes": [ 470 ], "iccProfileBytes": 456, "iccProfileSha256": "12afb4d9953adee0607d347daee5b78b18d6b3cab2d572b88970703f5edb37bc", "jfifDensityInterpretation": "unit 0/density 1×1 is an unspecified-unit pixel aspect ratio, not 1 DPI.", "pixelDecodingScope": "JPEG entropy/pixels and PNG-vs-JPEG MAE are covered only by the separate main Pillow observation." }, "countSeparation": { "mainChecksIncluded": false, "inputChecksIncluded": false, "inputCheckReference": "fixture-manifest.json has 20 preparation-only checks; not counted here." }, "limits": [ "One explicit-size self-authored font-free, external-resource-free SVG", "No independent source-SVG rasterizer or lossless/source-pixel-equivalence claim", "No text/fonts, filters, foreignObject, external resources, animations, arbitrary SVG or selectable dimensions/DPI validated" ] }, "actualOperations": { "fixtureUploads": 1, "inputFiles": 1, "inputFile": "synthetic-vector.svg", "fileInputAccept": "image/*", "conversionRuns": 2, "outputFormats": [ "JPEG", "PNG" ], "singleImageDownloads": 2, "nativeZipDownloads": 0, "keepExif": true, "initialSettings": "图片格式转换工具\n\n支持多种图片格式转换，批量处理\n\n开始转换\n文件列表 (1)\nsynthetic-vector.svg\n原始大小: 2.31 KB\n\n点击或拖拽添加更多图片文件\n\n最多支持20个文件\n\n转换设置\n输出格式\nJPEG\n元数据\n保留 EXIF 信息\n操作\n下载全部\n清空队列\nHEIC 转换提示\n\n目前暂不支持直接在浏览器中将 HEIC 格式转换为 JPG。 建议您在本地操作系统（如 macOS 或 iOS）中先行转换，或使用其他桌面工具进行转换。", "downloadButtonsClickedOncePerOutput": true, "downloadEventsObserved": false, "uniqueFreshOwnDownloadsVerified": true, "originalOutputFormatRestoredJpegWithoutThirdRun": true, "ownToolTabClosedAfterReceipt": true, "limits": "One self-authored SVG with explicit size and no external resources; no text/font/filter/animation behavior tested. No output size controls were visible in conversion settings." }, "marketEvidence": { "checkedAt": "2026-10-17 Asia/Shanghai", "seed": "svg转png", "selectedDuration": "3M", "scope": "All countries/languages/devices", "dateBounds": [ "2026-07-17", "2026-10-14" ], "seedImpressionsDisplayed": "17.7K", "exportRows": 19, "exportSha256": "2626b844a1511bac46cfcdd4d7d2113c04970ce0dd7248614daf5d0c909f5721", "relevantForwardConversionRows": [ { "Keyword": "svgtopng", "Trends": "[34,43,27,38,31,21,23,33,21,26]", "Impressions": "297" }, { "Keyword": "svg 转 png", "Trends": "[33,33,31,30,23,32,28,24,40,29,23]", "Impressions": "326" }, { "Keyword": "svg png", "Trends": "[33,37,55,42,31,48,32,31,37,42,34,46]", "Impressions": "468" }, { "Keyword": "svg转jpg", "Trends": "[80,100,78,54,62,67,79,76,88,72,59,67]", "Impressions": "882" }, { "Keyword": "svg to png converter", "Trends": "[326,327,287,306,253,250,264,274,279,266,231,257]", "Impressions": "3320" }, { "Keyword": "svg to jpg", "Trends": "[590,700,655,658,592,644,628,624,675,662,606,631]", "Impressions": "7665" }, { "Keyword": "svg to png", "Trends": "[3767,3827,3775,3660,3631,3515,3767,3566,3645,3539,3602,3580]", "Impressions": "43874" } ], "limits": [ "Market impressions are not monthly search volume or site traffic.", "PNG/JPG to SVG and SVG editing intents are distinct and cannot be claimed as supported.", "No SVG-input canonical is to be published before actual UI conversion verification." ] }, "sourceHashes": [ { "file": "synthetic-vector.svg", "bytes": 2363, "sha256": "4a34ac6ee42701655d3e341314c9aa1b6da26fe30ca752e79852662a85456731" }, { "file": "jpeg-native.jpg", "bytes": 24130, "sha256": "7d0d15416962e7f8b5b4599615a030c59c5dbfe5db7a3f0282b45b50c3d7d500" }, { "file": "png-native.png", "bytes": 125295, "sha256": "c6654f9e1c485ee77783b36ce20086e2d7a3163043c7011b770a524f1668e8b8" }, { "file": "jpeg-settings.jpg", "bytes": 81709, "sha256": "1b290acd47c4a4b0cb3a271fac22763b0f527ff90bd1ec653b2f1bbbbcf54e53" }, { "file": "png-settings.jpg", "bytes": 82302, "sha256": "30617249f47c0eaea903e0aafe4856d9b68afa0ce6ff03085fe31ac22e15b7e8" } ], "sourceReportHashes": [ { "file": "fixture-manifest.json", "sha256": "a5aec22409d805e54e3e8f651d491166737468f8aae9b956dd3b71dbdaba3514" }, { "file": "output-checks.json", "sha256": "811f1842848ab08d06e3fe71a53cadbabd8b3eb9481780d11d4143dee35159bf" }, { "file": "independent-output-checks.json", "sha256": "d3d72f6ce34819d177ec567c6dfca87f520757e9ac3486b7361da0e1b879974f" }, { "file": "product-run-receipt.json", "sha256": "00f07640691b054c1cf78c22e9b8ecb959a50b5363e6a073610b03d4d1e55f64" }, { "file": "keyword-research-review.json", "sha256": "f341600d58d3d046b62721d205472586faac5c4345e2bc8c629bdff9ff41ab50" }, { "file": "keyword-research-export.csv", "sha256": "2626b844a1511bac46cfcdd4d7d2113c04970ce0dd7248614daf5d0c909f5721" } ], "newBrowserOrProductRunsForPackaging": 0, "comparisonScope": "Local decoding of only the two native PNG/JPEG files, no source SVG renderer. Scaling and checkerboard are presentation only; raw source remains a fixed download, never inline.", "limits": [ "SVG text, font substitution, embedded/external fonts", "External resources, images, CSS, filters, masks, animation, scripts or foreignObject", "Absent or relative width/height, viewBox-only dimensions, DPI and custom target size", "Arbitrary SVG, browser differences, batch/ZIP behavior", "Source-to-output pixel identity, lossless conversion, re-editable vector structure", "EXIF preservation/removal semantics for SVG without EXIF" ] }