ISO IEC 13660 pdf download – Information technology – Office equipment – Measurement of image quality attributes for hardcopy output – Binary monochrome text and graphic images

ISO IEC 13660 pdf download – Information technology – Office equipment – Measurement of image quality attributes for hardcopy output – Binary monochrome text and graphic images
3Terms and definitions
For the purposes of this International Standard,the following terms and definitions apply. The image qualityattributes themselves are defined in Clause 5.
binary– any system based on exactly two possible values, such as 0/1 or black/white.binary image- an image with only two fundamental tones: the substrate and the colourant.
boundary- the region of an edge within which the reflectance factor makes the transition from 10% to 90% of thedifference between image and substrate reflectance factors.See also threshold contour.
character image– a specific physical representation of a character glyph.
colourant– the material used to make an image visible. In copying and electronic printing, the two maincolourants are dye and pigment.
density, optical- log10 (1/R), where Ris the reflectance factor, measured according with 0/45-degree geometry,lluminant A, and lSo visual density calibration.
distortion– undesired change in the shape of an image.
edge threshold– the points in the gradients of an edge that define the location of the edge.This is the thresholdcontour corresponding to Reo for the ROI.See also threshold contour.
gradient, edge— the relative reflectance value gradient along a line normal to the edge of an image segment.hardcopy- a document on a substrate.
human-readable– designed to be interpreted by a standard human viewer.
image element– a single, evidently intentional, object not connected to other objects.image segment– a collection of image elements that are treated as a unit.
inner boundary edge- the point in the gradient of an edge that is at 90% of the transition from the substratereflectance factor to the image reflectance factor: Rgo = Rma.-90%(Rmax 一 Rmin).
line width- width of the line measured normal to the line from edge threshold to edge threshold.monochrome image- an image in one colour or shades of one hue.
nominal– a value used as a reference value. This value is obtained by assumption, by calculation, or by someother means and then treated as the actual, intended value.
normal edge profile— the reflectance factor gradient along a line normal to the edge of an image segment.
outer boundary edge— the point in the gradient of an edge that is at 10% of the transition from the substratereflectance factor to the image reflectance factor: Ryo = Rmax-10%(Rmax 一 Rmin).
page– a collection of text, graphics, and other image objects intended to be printed on one side of a sheet ofhardcopy.
pixel– a contraction of the term“picture element;the smallest geometric unit of information in a digitalrepresentation of an image.
4 Report of results and sampling scheme
This clause contains the three possible image sampling schemes (4.3) and a description of the report of an evaluation carried out under this International Standard (4.1 ).
4.1 Report of results
4.1.1 Test identification information
The report shall include the date of the measurements, the identity of the test operator, lot identifications, etc.
4.1.2 Instrument system
The report shall include a description of the instrument system used, noting any of the specifications (see Clause 6)
that are emulated or deviated from in any way.
4.1.3 Compliance
Report the results of the compliance tests. (See Clause 6 and Annex B.)
4.1.4 Sampling scheme
The report shall include a complete description of the sampling scheme (4.3) used to select the pages and images.
4.1.5 Results
For each attribute, the report shall include the number of samples per page and the mean, standard deviation, and range of the results for each page and for the entire lot.