Image processing method and apparatus

• US 6,646,760 B1
• Filed: 09/07/1999
• Issued: 11/11/2003
• Est. Priority Date: 09/07/1998
• Status: Expired due to Term

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Hanihara, Kanji
• Primary Examiner(s): ROGERS, SCOTT A
• Application Number:
  US09/390,631
• Time in Patent Office: 1,526 Days
• Field of Search: 358/1.9, 358/3.26, 358/518, 358/530, 382/275, 382/167, 382/255, 382/274, 382/282, 348/241, 348/222.1, 396/311, 355/52, 355/40
• US Class Current: 358/1.9
• CPC Class Codes: G06T 2207/10008 from scanner, fax or copier
• CPC Class Codes: G06T 5/80 Geometric correction
• CPC Class Codes: H04N 1/3873 defined only by a limited number of coordinate points or parameters, e.g. corners, centre; for trimming
• CPC Class Codes: H04N 1/401 Compensating positionally unequal response of the pick-up or reproducing head H04N1/403 takes precedence
• CPC Class Codes: H04N 1/58 Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction H04N1/62 takes precedence

Abstract

The image processing method and apparatus display a processed image on a monitor as it is reproduced from processed image data obtained by performing specified processing schemes on input image data obtained from a picture optically taken with a taking lens, designate a portion of the processed image on the monitor to create a designated area in accordance with a state of an aberration in the processed image due to the taking lens, determine a corrective value for correcting the aberration based on an information in the input image data for the designated area and correct, based on the corrective value, the aberration on the input image data obtained from the picture and outputting the corrected image data. When the image suitable for outputting a print is obtained from the picture optically taken with the taking lens by the correction of the aberrations due to the taking lens is performed manually, the correction of the aberrations is capable of performing in a uniform and appropriate manner independently of the operator'"'"'s experience and obtaining efficiently a satisfactory finished print.

Claims

1. An image processing method that obtains input image data from a picture optically taken with a taking lens and that performs specified processing schemes on the obtained input image data to obtain output image data suitable for producing an output image, which comprises the steps of:

displaying a processed image on a monitor as it is reproduced from processed image data obtained by performing specified processing schemes on the input image data obtained from said picture;

designating a portion of said processed image on said monitor to create a designated area in accordance with a state of an aberration in said processed image due to the taking lens;

determining a corrective value for correcting said aberration based on an information in the input image data for the designated area; and

correcting, based on said corrective value, said aberration on the input image data obtained from said picture and outputting the corrected image data.

2. The image processing method according to claim 1, wherein said processed image is one that is reproduced from the processed image data obtained by processing the input image data obtained from said picture such that initial correction of the aberration due to said taking lens is subjected based on an initial correcting value as determined by an information about said taking lens or a predetermined initial correcting value.

3. The image processing method according to claim 1, wherein, when said corrective value is determined based on the information in the input image data for said designated area, a provisional corrective value is determined for the input image data obtained from said picture and provisional correction is performed based on the provisional corrective value to obtain provisionally corrected image data and, depending upon the state of the aberration in a provisionally corrected image, said provisional correcting value is cancelled and said provisionally corrected image data is reverted to the processed image data for said processed image.

4. The image processing method according to claim 1, wherein said aberration is distortion based on the aberrations of said taking lens, said designated area is defined by a reference line which is either a horizontal line or a vertical line or both that are obtained by designating two points on said processed image and a designated point not lying on said reference line, and the step of determining the corrective value based on the information in the input image data for said designated area is for determining the corrective value for correcting the distortion by determining the correcting value based on the position information about the recorded subject such that said designated point comes to lie on said reference line as a result of correction.

5. The image processing method according to claim 1, wherein said aberration is chromatic aberration of magnification based on the aberrations of the taking lens, said designated area is created by designating the portion which involves a color mismatch caused by the chromatic aberration of magnification in said processed image, and the step of determining the corrective value based on the information in the input image data for said designated area is for determining the corrective value for correcting the chromatic aberration of magnification by first performing provisional correction on the input image data for said designated area, with the corrective value for use in correcting the chromatic aberration of magnification being varied, and then determining the corrective value based on the chromatic aberration of magnification of the processed image in said designated area after it has been corrected provisionally.

6. The image processing method according to claim 1, wherein said aberration is deterioration of marginal lumination based on the aberrations of the taking lens, said designated area is a rectangular area within said processed image, that has at a center a single reference point designated from among four reference points that lie on two diagonals across said processed image and which are spaced from an intersection of the two diagonals by a specified distance toward corners of said processed image, and the step of determining the corrective value based on the information in the input image data for said designated area is for determining the corrective value for correcting the deterioration of the marginal lumination by first performing provisional correction on the input image data for said designated area, with the corrective value for use in correcting the deterioration of the marginal lumination being varied, and then determining the corrective value based on the deterioration of the marginal lumination of the processed image in said designated area after it has been corrected provisionally.

7. The image processing method according to claim 6, wherein the single reference point designated from among said four reference points is closest to a position on said processed image, that is designated for correcting the deterioration of the marginal lumination.

8. The image processing method according to claim 6, wherein said specified distance ranges from 0.2 to 0.5 times length of said diagonals.

9. The image processing method according to claim 2, wherein said picture is one that is subjected to image processing after another picture that was taken with the taking lens as same as what was used to take said picture and said predetermined initial corrective value was determined when correcting the aberrations due to said taking lens in said another image.

10. An image processing apparatus that obtains input image data from an image optically taken with a taking lens and that performs specified processing schemes on the obtained input image data to obtain output image data suitable for producing an output image, comprising:

information acquisition means for acquiring an information about the taking lens used to take said image;

initial correcting means for performing on the input image data initial correction of an aberration due to said taking lens based on either an initial corrective value that is determined by the information about the taking lens that was obtained by said information acquisition means or a predetermined initial corrective value;

a monitor for displaying an image that has been subjected to said initial correction;

designating means by which a portion of said image that has been subjected to said initial correction is designated as a designated area on said monitor; and

correcting means which, based on an image information about the designated area created by designation by said designating means, determines a corrective value for correcting said aberration and corrects the aberration in said taken image based on the corrective value.