Image synthesizing apparatus
AssigneeSharp Kabushiki Kaisha
InventorsMasaki Takakura, Yasukuni Yamane, Noritoshi Kako
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Abstract
An image synthesizing apparatus includes a first storage unit for storing first image data, a second storage unit for storing second image data, a third storage unit for storing data of a synthesizing ratio of the first image data to the second image data, a selective unit for selectively outputting at least the lower bits of the first and second image data based on the synthesizing ratio, and a synthesizing unit for synthesizing the image data selected by the selective unit and outputting the synthesized image data. The selective unit is connected to the first, second and third storage unit, and the synthesizing unit is connected to the selective unit.
Claims9
An image synthesizing apparatus for synthesizing two images in a given ratio, the apparatus comprising:
- a first storage means for storing first image data;
- a second storage means for storing second image data;
- a third storage means for storing data of a synthesizing ratio of said first image data to second image data;
- a fourth storage means for storing a plurality of sets of bit selection data, the plurality of sets respectively corresponding to a plurality of synthesizing ratios, for selecting a part of bit data from the first image data and a part of bit data from the second image data so as to minimize a difference between an image synthesized in each of said synthesizing ratios by said first image data and said second image data as a whole, and an image synthesized by each of said synthesizing ratios by said part of bit data of said first image data and said part of bit data of said second image data, and for outputting one set of bit selection data corresponding to said stored synthesizing ratio in said third storage means;
- a selecting means for selecting said part of bit data of said first image data and said part of bit data of said second image data on the basis of said one set of bit selection data outputted from said fourth storage means;
- a synthesizing means stored with synthesized image data of said first image data to said second image data for all combination of said selected part of bit data and said synthesizing ratio, and for outputting said synthesized image data corresponding to said selected part of bit data and said synthesizing ratio stored in said third storage means;
- and
- wherein said bit selection data stored in said fourth storage means is obtained by minimizing the following equation:
- (2.sup..delta.a .times.C+2.sup.(D-.delta.a) .times.(Cm-C))/Cm
- where .delta.a+.delta.b=D (D is a constant),
- .beta.=C/Cm,
- .delta.a denotes the error of the first image data,
- .delta.b denotes the error of the second image data,
- .beta.denotes the synthesizing ratio,
- C denotes the control data,
- Cm denotes the maximum control data.
An image synthesizing apparatus for synthesizing two images in a given ratio, the apparatus comprising:
- a first storage means for storing first image data;
- a second storage means for storing second image data;
- a third storage means for storing data of a synthesizing ratio of said first image data to second image data;
- a selecting means for selecting at least part of bit data of said first image data and at least part of bit data of said second image data;
- control means for controlling the selecting means based on an error minimizing relationship, the control means including a table having contents of a plurality of sets of bit selection data corresponding to a plurality of respective synthesizing ratios, each set of selection data being determined based on said error minimizing relationship;
- a synthesizing means stored with synthesized image data of said first image data to said second image data for all combination of said selected part of bit data and said synthesizing ratio, and for outputting said synthesized image data corresponding to said selected part of bit data and said synthesizing ratio stored in said third storage means;
- and
- wherein said error minimizing relationship is as follows:
- (2.sup..sym.a .times.C+2.sup.(D-.sym.a) .times.(Cm-C))/Cm
- where .delta.a+.delta.b=D (D is a constant.),
- .beta.=C/Cm,
- .delta.a denotes the error of the first image data,
- .delta.b denotes the error of the second image data,
- .beta. denotes the synthesizing ratio,
- C denotes the control data,
- Cm denotes the maximum control data.
Dependencies are inferred from the claim text.