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Total XMP blob size smaller than 64 KB
<rdf:Description rdf:about=""
xmlns:GDepth="http://ns.google.com/photos/1.0/depthmap/"
GDepth:Mime="image/jpeg"
GDepth:Format="RangeInverse"
GDepth:Near="29.3"
GDepth:Far="878.7"
GDepth:Mime="image/png"
GDepth:Data="iVBORw0KGgoAAAANSUhEUgAAAtAAAAPACAYAAAA..." />
Total XMP blob size larger than 64 KB
<rdf:Description rdf:about=""
xmlns:GDepth="http://ns.google.com/photos/1.0/depthmap/"
xmlns:xmpNote="http://ns.adobe.com/xmp/note/"
GDepth:Mime="image/jpeg"
GDepth:Format="RangeInverse"
GDepth:Near="29.3"
GDepth:Far="878.7"
GDepth:Mime="image/png"
GDepth:MeasureType="OpticalAxis"
GDepth:ConfidenceMime="image/png"
GDepth:Manufacturer="Primesense"
GDepth:Model="Carmine"
GDepth:Software="Tango 1.0"
GDepth:Units="mm"
xmpNote:HasExtendedXMP="36BE52D449F3E6B9760D7602FF75168D"/>
and a possibly very large extended xmp section:
<rdf:Description rdf:about=""
xmlns:GDepth="http://ns.google.com/photos/1.0/depthmap/"
GDepth:Data="iVBORw0KGgoAAAANSUhEUgAAAtAAAAPACAYAAAA..."
GDepth:Confidence="iVBORw0KGgoAAATNSUhEUgBAAtAAAACCA..." />
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Last updated 2023-06-23 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2023-06-23 UTC."],[[["\u003cp\u003eDepth data in Google Photos is stored using XMP metadata, with different handling for data sizes below and above 64 KB.\u003c/p\u003e\n"],["\u003cp\u003eSmaller depth data is directly embedded within the main XMP block using the \u003ccode\u003eGDepth:Data\u003c/code\u003e tag.\u003c/p\u003e\n"],["\u003cp\u003eLarger depth data is split, with key properties in the main XMP and the raw depth and confidence data moved to an extended XMP section referenced by \u003ccode\u003exmpNote:HasExtendedXMP\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eGDepth\u003c/code\u003e namespace defines specific tags for depth metadata like format, near/far values, and measurement units.\u003c/p\u003e\n"],["\u003cp\u003eExtended XMP allows for storing large depth and confidence data separately, ensuring efficient handling of comprehensive depth information.\u003c/p\u003e\n"]]],[],null,[]]