Abstract Method for rotating an image by 90 degrees includes the steps of: storing the image in a raster format arranged in r rows by c columns, image information in each row being stored in a number of bytes, each byte having b bits, there being c/b bytes in each row of the raster format; moving a block of the image into a temporary storage, there being n rows by m columns in the block; separating each image block into groups of bytes of rotatable size; determining for each group if all bits are the same value; rotating each group that does not have all bits the same value; storing each rotated group in an output area of the raster storage; repeating the above steps for all remaining blocks of the image.
Inventors
👤 Karen Louise Anderson
👤 Frederick Cole Mintzer
👤 Gerald Goertzel
👤 Joan La Verne Mitchell
Bibliographic Details
Application Number—
JurisdictionEP
Data Sourcegoogle_patents
Last Synchronized2026-11-03 21:53
CPC Classifications
G; G06; G06T; G06T3/00; G06T3/60; G06T3/602
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A method for rotating an image comprising the steps of: storing said image in raster form having a plurality of bytes, each byte having n bits; copying a plurality of bytes into a temporary storage; separating said plurality of bytes into groups of rotatable size; determining for each said group if all bits are same values; rotating each group that does not have all bits the same value; storing each rotated group in an output area of said raster storage.
Claim 2
Independent Claim
80 words
A method for rotating an image comprising the steps of: storing said image in raster form having a plurality of bytes, each byte having n bits; copying a plurality of bytes into a temporary storage; separating said plurality of bytes into groups of rotatable size; determining for each said group if all bits are same values; rotating each group that does not have all bits the same value; storing each rotated group in an output area of said raster storage.
Claim 3
Dependent Claim
35 words
A method according to claim 1 further comprising the step of: moving a remainder of said stored image to fill the space vacated by said plurality of bytes for in situ rotation of said image.
Claim 4
Dependent Claim
20 words
A method according to claim 1 wherein said step of determining further comprises: testing each group for all one bits.
Claim 5
Dependent Claim
20 words
A method according to claim 1 wherein said step of determining further comprises: testing each group for all zero bits.
Claim 6
Dependent Claim
27 words
A method according to claim 1 wherein said step of separating further comprises: selecting 8 by 8 bit blocks of said image for rotation by ninety degrees.
References Cited (Backward Citations)
No citation records indexed.
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