Display Filter Reference: Portable Network Graphics

Protocol field name: png

Versions: 1.0.0 to 4.4.0

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Field name Description Type Versions
png.bkgd.blueBlueUnsigned integer (16 bits)1.0.0 to 4.4.0
png.bkgd.greenGreenUnsigned integer (16 bits)1.0.0 to 4.4.0
png.bkgd.greyscaleGreyscaleUnsigned integer (16 bits)1.0.0 to 4.4.0
png.bkgd.palette_indexPalette IndexUnsigned integer (8 bits)1.0.0 to 4.4.0
png.bkgd.redRedUnsigned integer (16 bits)1.0.0 to 4.4.0
png.chrm.blue.xBlue XFloating point (single-precision)1.12.0 to 4.4.0
png.chrm.blue.yBlue YFloating point (single-precision)1.12.0 to 4.4.0
png.chrm.green.xGreen XFloating point (single-precision)1.12.0 to 4.4.0
png.chrm.green.yGreen YFloating point (single-precision)1.12.0 to 4.4.0
png.chrm.red.xRed XFloating point (single-precision)1.12.0 to 4.4.0
png.chrm.red.yRed YFloating point (single-precision)1.12.0 to 4.4.0
png.chrm.white.xWhite XFloating point (single-precision)1.12.0 to 4.4.0
png.chrm.white.yWhite YFloating point (single-precision)1.12.0 to 4.4.0
png.chunk.crcCRCUnsigned integer (32 bits)1.0.0 to 4.4.0
png.chunk.dataDataLabel1.0.0 to 4.4.0
png.chunk.flag.ancillaryAncillaryBoolean1.0.0 to 4.4.0
png.chunk.flag.privatePrivateBoolean1.0.0 to 4.4.0
png.chunk.flag.stcSafe To CopyBoolean1.0.0 to 4.4.0
png.chunk.lenLenUnsigned integer (32 bits)1.0.0 to 4.4.0
png.chunk.typeTypeCharacter string1.0.0 to 4.4.0
png.chunk_too_largechunk size too large, dissection of this chunk is not supportedLabel1.12.0 to 4.4.0
png.gama.gammaGammaFloating point (single-precision)1.12.0 to 4.4.0
png.ihdr.bitdepthBit DepthUnsigned integer (8 bits)1.0.0 to 4.4.0
png.ihdr.colour_typeColour TypeUnsigned integer (8 bits)1.0.0 to 4.4.0
png.ihdr.compression_methodCompression MethodUnsigned integer (8 bits)1.0.0 to 4.4.0
png.ihdr.filter_methodFilter MethodUnsigned integer (8 bits)1.0.0 to 4.4.0
png.ihdr.heightHeightUnsigned integer (32 bits)1.0.0 to 4.4.0
png.ihdr.interlace_methodInterlace MethodUnsigned integer (8 bits)1.0.0 to 4.4.0
png.ihdr.widthWidthUnsigned integer (32 bits)1.0.0 to 4.4.0
png.phys.horizHorizontal pixels per unitUnsigned integer (32 bits)1.0.0 to 4.4.0
png.phys.unitUnitUnsigned integer (8 bits)1.0.0 to 4.4.0
png.phys.vertVertical pixels per unitUnsigned integer (32 bits)1.0.0 to 4.4.0
png.signaturePNG SignatureByte sequence1.0.0 to 4.4.0
png.srgb.intentIntentUnsigned integer (8 bits)1.12.0 to 4.4.0
png.text.keywordKeywordCharacter string1.0.0 to 4.4.0
png.text.stringStringCharacter string1.0.0 to 4.4.0
png.time.dayDayUnsigned integer (8 bits)1.0.0 to 4.4.0
png.time.hourHourUnsigned integer (8 bits)1.0.0 to 4.4.0
png.time.minuteMinuteUnsigned integer (8 bits)1.0.0 to 4.4.0
png.time.monthMonthUnsigned integer (8 bits)1.0.0 to 4.4.0
png.time.secondSecondUnsigned integer (8 bits)1.0.0 to 4.4.0
png.time.yearYearUnsigned integer (16 bits)1.0.0 to 4.4.0