摘要:
A computerised methodology for reducing swath scanner swath boundary discontinuities is provided by using a predetermined overlap of pixel row during each sequential scan. Pixel data from a first scan (400-401) of the overlapped pixel rows is compared to the pixel data from a second scan (405, 409, 411, 415, 417) of the overlapped pixel rows, identical pixels of the overlapped pixel rows ideally having the same representative scan data. Errors are compensated by weighting representative scan data for each pixel row, linearly decreasing the weighting in proportion to the proximity to the swath boundary (413). Weighted data is substituted for true data depending upon comparison factors (403, 407). In one embodiment, the weighting factor is an increase or decrease in the first scan data relative to the percentage change in white level intensity captured in the second scan of the overlapped pixel rows. In another embodiment, the weighting factor is a linear shifting of the proportion of the pixel data from the first scan and the pixel data from the second scan of the overlapped pixel rows used as the scanned image data such that the proportion of the first scan decreases as the proportion of the second scan increases, thereby smoothing differentials in data representative of individual pixel rows at swath boundaries. In another embodiment, scanner signal-to-noise ratio is improved by using a weighting factor in accordance with the Central Limit Theorem.
摘要:
Image data is thinned out by using thinning patterns having arrays not synchronized with an image data array according to an area gradation method at the same duty, and the resulting thinned image data is divisionally recorded on a predetermined area of a recording medium by using different record areas of a recording head while a scan operation is performed a plurality of number of times. The thinning patterns are formed such that substantially equal quantities of an ink are implanted in a plurality of number of times of the divisional recording.
摘要:
The recording apparatus includes a recording head (55) that performs dot-recording on the recording material through a plurality of recording elements arranged on the recording head; a mechanism (16, 17, 18, 19, 20A, 20B) to move the recording head in a main scan direction to perform recording; and a transport mechanism (103A, 104A, 105A, 106A) to feed the recording material in a sub-scan direction perpendicular to the main scan direction after each main scan operation. The transport mechanism is formed of a combination of driving elements (103A, 104A, 105A, 106A) including a driving source (22). The feeding distance that the recording material is fed in one feeding operation is set synchronized with the driving cycle of the driving elements including the driving source. This arrangement allows the recording head, which has an array of ink ejection nozzles (65) arranged with a conventional density, to produce a dot-recorded image having a resolution two or more times higher than the conventional resolution.
摘要:
Image data is thinned out by using thinning patterns having arrays not synchronized with an image data array according to an area gradation method at the same duty, and the resulting thinned image data is divisionally recorded on a predetermined area of a recording medium by using different record areas of a recording head while a scan operation is performed a plurality of number of times. The thinning patterns are formed such that substantially equal quantities of an ink are implanted in a plurality of number of times of the divisional recording.
摘要:
Verfahren zur Harmonisierung für Offsetspannungen und unterschiedliche Responsivitäten bei einem elektrooptischen Zeilen- oder Mosaikdetektor; zusätzlich wird die Beseitigung bzw. Reduzierung des Aliasing-Phänomens angestrebt. Hierzu werden wenigstens jeweils zwei Detektoren (1; 2) einer aus der Szene abgeleiteten, möglichst identischen Strahlung und einer möglichst identischen Änderung derselben ausgesetzt, indem diese Aussetzung so schnell hintereinander erfolgt, daß praktisch keine Veränderung der Szenenstrahlung möglich ist. Der Detektor 1 wird hierbei von seiner Ruhestellung 1' zur Position2', der Ruhestellung von Detektor 2 und fakultativ zur Position 5' geführt, während Detektor 2 von Position 2'' nach 5'' und fakultativ nach n' geführt wird. Die Ausgangsspannungen dieser Detektoren werden elektrisch kompensiert oder harmonisiert.
摘要:
Quality of printed images as produced by an ink-jet printer ( 10 ) is improved by staggering applications of ink dots ( 30 ) to pixel locations ( 36 ) such that overlapping ink dots ( 30 ) are printed on successive passes of a printhead (16) and such that swaths ( 38 ) are partially printed on overlapping passes of the printhead ( 16 ). Quality of multi-colored or multi-shaded images is further improved by grouping pixels ( 36 ) into super pixels ( 42 ), and applying various combinations of colored ink dots ( 30 ) to the various pixels ( 36 ) within each super pixel ( 42 ) in a staggered sequence.
摘要:
Procédé d'analyse et/ou de restitution de documents selon lequel on traite par des moyens' d'analyse ou de restitution plusieurs lignes à la fois, dans un seul balayage suivant une direction X, et, après ce balayage, une translation relative est effectée entre le document et les moyens d'analyse ou de restitution suivant une direction Y transversale à la direction X, puis un nouveau balayage de plusieurs lignes suivantes a lieu et ainsi de suite, ce procédé étant prévu pour analyser ou restituer p points suivant chaque ligne. On effectue chaque balayage suivant une largeur de n.k lignes; à chaque balayage on traite p/k points par ligne; la translation suivant la direction Y, entre deux balayages successifs, a une amplitude correspondant à n lignes et, à chaque balayage, on traite des points qui sont décalés par rapport aux points du balayage précédent d'une distance i/k suivant la direction X, i étant la distance qui sépare deux points successifs d'une ligne divisée en p/k points.
摘要:
P (fifteen) recording heads are arranged in two columns in a zigzag pattern in a recording unit. The P recording heads are divided into N (two) groups in the sub-scanning direction (up-down direction in the figure). The N (two) controllers respectively control the recording heads pertaining to corresponding groups. Therefore, the number of the boundary (M/S boundary line) of the recording regions (master recording region and slave recording region) of the recording heads controlled by the different controllers becomes at least N-1 (one).
摘要:
A method of multi-pass dot matrix printing, wherein a print head (30) records print data on a medium in swaths by scanning the print head relative over the medium along a fast scan direction (33) bidirectionally and by feeding the medium relative to the print head along a feed direction (34) transverse to the fast scan direction comprises the step of predetermining a chronological order of recording the swaths and a sequence of medium feeds for obtaining the chronological order. The sequence comprises medium feeds in a forward sense (31) of the feed direction and medium feeds in the reverse sense (32) thereof. The chronological order of recording and the sequence of medium feeds are so selected that recorded swaths form a superposition of layers of swaths, each layer formed of a juxtaposition of at least portions of swaths and that for at least one layer of said superposition, the swaths forming said at least one layer are recorded by fast scans of the print head running in a same fast scan sense. Printing apparatuses for carrying out said methods are disclosed as well.