JP2017108323A5 - - Google Patents
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Description
本発明の一態様に係る画像処理装置は、主走査方向に並ぶ複数のラインセンサが、前記複数のラインセンサの内の隣り合うラインセンサの読取範囲の端部同士が互いに重なるオーバーラップ領域を有するように配置された撮像部によって、生成された画像信号を処理する画像処理装置であって、前記画像信号に基づく画像データを格納する画像メモリと、前記画像メモリから読み出された前記画像データの内の前記オーバーラップ領域の画像データから、副走査方向の基準位置の基準データと、前記基準データのオーバーラップ領域に重複する領域における比較データとを求め、前記基準データと前記比較データとを比較する処理を、前記比較データの位置を副走査方向に移動させた複数の位置について行い、前記基準データと前記複数の副走査方向の位置についての前記比較データとの類似度を算出し、前記類似度を示す類似度データを出力する類似度算出部と、前記類似度データから前記複数の副走査方向の位置での比較データの内の最も高い類似度を持つ比較データの位置を求め、前記基準データの副走査方向の位置と前記最も高い類似度を持つ比較データの位置との差分に基づき位置ずれ量を算出し、前記位置ずれ量を示す位置ずれ量データを出力する位置ずれ推定部と、前記類似度データの値に基づき前記類似度データの極値を検出する処理を行い、前記処理の結果と前記検出された極値の数とに基づいて前記オーバーラップ領域における前記位置ずれ量の信頼度を設定し、前記信頼度を示す信頼度データを出力する信頼度判定部と、前記信頼度判定部から出力された前記信頼度データに基づいて、前記オーバーラップ領域である第１の領域における前記位置ずれ量データを、前記第１の領域での信頼度よりも高い信頼度を持ち、前記第１の領域と異なる他のオーバーラップ領域である第２の領域における位置ずれ量データによって補正する相関位置補正部と、前記相関位置補正部によって補正された位置ずれ量データに基づいて前記画像メモリから読み出される画像データの内の、前記隣り合うラインセンサによって読み出された画像データを結合することによって合成画像データを生成する結合処理部とを備え、前記第２の領域は、前記第１の領域の直ぐ隣のオーバーラップ領域の少なくとも一方を含むことを特徴としている。 In the image processing device according to one aspect of the present invention, the plurality of line sensors arranged in the main scanning direction have an overlap region in which ends of reading ranges of adjacent line sensors among the plurality of line sensors overlap each other. An image processing apparatus that processes an image signal generated by an imaging unit arranged as described above, the image memory storing image data based on the image signal, and the image data read from the image memory The reference data of the reference position in the sub-scanning direction and the comparison data in the area overlapping the overlap area of the reference data are obtained from the image data of the overlap area, and the reference data and the comparison data are compared Processing is performed for a plurality of positions where the position of the comparison data is moved in the sub-scanning direction, and the reference data and the plurality of sub-data are A similarity calculation unit that calculates the similarity with the comparison data for the position in the inspection direction and outputs the similarity data indicating the similarity, and the comparison at the positions in the plurality of sub-scanning directions from the similarity data Find the position of the comparison data having the highest similarity in the data, calculate the amount of displacement based on the difference between the position of the reference data in the sub-scanning direction and the position of the comparison data having the highest similarity, A positional deviation estimation unit that outputs positional deviation amount data indicating the positional deviation amount, a process of detecting an extreme value of the similarity data based on the value of the similarity degree data, and a result of the process and the detected A reliability determination unit configured to set reliability of the positional deviation amount in the overlap region based on the number of extreme values, and output reliability data indicating the reliability; and output from the reliability determination unit Previous Based on the reliability data, the misregistration amount data in the first area which is the overlap area has a reliability higher than the reliability in the first area and is different from the first area. A correlation position correction unit that corrects the positional deviation amount data in the second region, which is an overlap region, and image data read from the image memory based on the positional deviation amount data corrected by the correlation position correction unit. A combination processing unit that generates combined image data by combining image data read by the adjacent line sensors, and the second region overlaps immediately adjacent to the first region. It includes at least one of the regions .
本発明の他の態様に係る画像処理方法は、主走査方向に並ぶ複数のラインセンサが、前記複数のラインセンサの内の隣り合うラインセンサの読取範囲の端部同士が互いに重なるオーバーラップ領域を有するように配置された撮像部によって、生成された画像信号を処理する画像処理方法であって、前記画像信号に基づく画像データを画像メモリに格納する格納ステップと、前記画像メモリから読み出された前記画像データの内の前記オーバーラップ領域の画像データから、副走査方向の基準位置の基準データと、前記基準データのオーバーラップ領域に重複する領域における比較データとを求め、前記基準データと前記比較データとを比較する処理を、前記比較データの位置を副走査方向に移動させた複数の位置について行い、前記基準データと前記複数の副走査方向の位置についての前記比較データとの類似度を算出し、前記類似度を示す類似度データを出力する類似度算出ステップと、前記類似度データから前記複数の副走査方向の位置での比較データの内の最も高い類似度を持つ比較データの位置を求め、前記基準データの副走査方向の位置と前記最も高い類似度を持つ比較データの位置との差分に基づき位置ずれ量を算出し、前記位置ずれ量を示す位置ずれ量データを出力する位置ずれ推定ステップと、前記類似度データの値に基づき前記類似度データの極値を検出する処理を行い、前記処理の結果と前記検出された極値の数とに基づいて前記オーバーラップ領域における前記位置ずれ量の信頼度を設定し、前記信頼度を示す信頼度データを出力する信頼度判定ステップと、前記信頼度判定ステップで出力された前記信頼度データに基づいて、前記オーバーラップ領域である第１の領域における前記位置ずれ量データを、前記第１の領域での信頼度よりも高い信頼度を持ち、前記第１の領域と異なる他のオーバーラップ領域である第２の領域における位置ずれ量データによって補正する相関位置補正ステップと、前記相関位置補正ステップで補正された位置ずれ量データに基づいて前記画像メモリから読み出される画像データの内の、前記隣り合うラインセンサによって読み出された画像データを結合することによって合成画像データを生成する結合処理ステップとを有し、前記第２の領域は、前記第１の領域の直ぐ隣のオーバーラップ領域の少なくとも一方を含むことを特徴としている。 In the image processing method according to another aspect of the present invention, the plurality of line sensors arranged in the main scanning direction has an overlap region in which ends of reading ranges of adjacent line sensors of the plurality of line sensors overlap each other. An image processing method for processing a generated image signal by an imaging unit arranged to have a storage step of storing image data based on the image signal in an image memory, and reading from the image memory The reference data of the reference position in the sub-scanning direction and the comparison data in the area overlapping the overlap area of the reference data are obtained from the image data of the overlap area of the image data, and the reference data and the comparison A process of comparing data is performed for a plurality of positions where the position of the comparison data is moved in the sub-scanning direction, and the reference data is Calculating a similarity between the plurality of sub-scanning direction positions and the comparison data, and outputting similarity data indicating the similarity, and calculating the plurality of sub-scanning directions from the similarity data The position of the comparison data having the highest similarity in the comparison data at the position is obtained, and the position shift is based on the difference between the position of the reference data in the sub-scanning direction and the position of the comparison data having the highest similarity. A positional deviation estimation step for calculating a quantity and outputting positional deviation amount data indicating the positional deviation amount; and a process for detecting an extreme value of the similarity degree data based on the value of the similarity degree data. said based on the number of detected extreme setting the reliability of the positional shift amount in the overlap region, the reliability determination step of outputting a reliability data indicating the reliability and Based on the reliability data output in the reliability determination step, the positional deviation amount data in the first area that is the overlap area is given a higher reliability than the reliability in the first area. A correlation position correction step that is corrected by position shift amount data in a second region that is another overlap region different from the first region, and based on the position shift amount data corrected in the correlation position correction step. wherein in the image data read out from the image memory, possess a binding processing step of generating a composite image data by combining the image data read by the adjacent line sensors, said second region, It includes at least one of the overlap regions immediately adjacent to the first region .
本発明の他の態様に係る画像読取装置は、
主走査方向に並ぶ複数のラインセンサが、前記複数のラインセンサの内の隣り合うラインセンサの読取範囲の端部同士が互いに重なるオーバーラップ領域を有するように配置された撮像部と、前記撮像部によって、生成された画像信号に基づく画像データを格納する画像メモリと、前記画像メモリから読み出された前記画像データの内の前記オーバーラップ領域の画像データから、副走査方向の基準位置の基準データと、前記基準データのオーバーラップ領域に重複する領域における比較データとを求め、前記基準データと前記比較データとを比較する処理を、前記比較データの位置を副走査方向に移動させた複数の位置について行い、前記基準データと前記複数の副走査方向の位置についての前記比較データとの類似度を算出し、前記類似度を示す類似度データを出力する類似度算出部と、前記類似度データから前記複数の副走査方向の位置での比較データの内の最も高い類似度を持つ比較データの位置を求め、前記基準データの副走査方向の位置と前記最も類似度が高い比較データの位置との差分に基づき位置ずれ量を算出し、前記位置ずれ量を示す位置ずれ量データを出力する位置ずれ推定部と、前記類似度データの値に基づき前記類似度データの極値を検出する処理を行い、前記処理の結果と前記検出された極値の数とに基づいて前記オーバーラップ領域における前記位置ずれ量の信頼度を設定し、前記信頼度を示す信頼度データを出力する信頼度判定部と、前記信頼度判定部から出力された前記信頼度データに基づいて、前記オーバーラップ領域である第１の領域における前記位置ずれ量データを、前記第１の領域での信頼度よりも高い信頼度を持ち、前記第１の領域と異なる他のオーバーラップ領域である第２の領域における位置ずれ量データによって補正する相関位置補正部と、前記相関位置補正部によって補正された位置ずれ量データに基づいて前記画像メモリから読み出される画像データの内の、前記隣り合うラインセンサによって読み出された画像データを結合することによって合成画像データを生成する結合処理部とを備え、前記第２の領域は、前記第１の領域の直ぐ隣のオーバーラップ領域の少なくとも一方を含むことを特徴としている。
An image reading apparatus according to another aspect of the present invention includes:
An imaging unit in which a plurality of line sensors arranged in the main scanning direction have an overlap region in which ends of reading ranges of adjacent line sensors of the plurality of line sensors overlap each other; and the imaging unit The reference data of the reference position in the sub-scanning direction from the image memory for storing the image data based on the generated image signal and the image data of the overlap area in the image data read from the image memory And comparison data in an area overlapping the overlap area of the reference data, and comparing the reference data and the comparison data with a plurality of positions where the position of the comparison data is moved in the sub-scanning direction And calculating the similarity between the reference data and the comparison data for the positions in the sub-scanning direction. A similarity calculation unit that outputs similarity data indicating a position of comparison data having the highest similarity among the comparison data at the plurality of positions in the sub-scanning direction from the similarity data, and the reference data A positional deviation estimation unit that calculates a positional deviation amount based on a difference between a position in the sub-scanning direction and a position of the comparison data having the highest similarity, and outputs positional deviation amount data indicating the positional deviation amount, and the similarity Based on the value of the degree data, a process of detecting the extreme value of the similarity data is performed, and the reliability of the positional deviation amount in the overlap region is determined based on the result of the process and the number of detected extreme values. A reliability determination unit configured to output reliability data indicating the reliability, and a first region that is the overlap region based on the reliability data output from the reliability determination unit. The misregistration amount data is corrected by misregistration amount data in a second region which is a different overlap region from the first region and has a higher reliability than the reliability in the first region. A correlation position correction unit and image data read by the adjacent line sensor among image data read from the image memory based on the positional deviation amount data corrected by the correlation position correction unit are combined. And a combination processing unit for generating composite image data , wherein the second area includes at least one of the overlap areas immediately adjacent to the first area .
本発明の他の態様に係るプログラムは、主走査方向に並ぶ複数のラインセンサが、前記複数のラインセンサの内の隣り合うラインセンサの読取範囲の端部同士が互いに重なるオーバーラップ領域を有するように配置された撮像部によって、生成された画像信号に基づく画像データを格納する画像メモリから読み出された前記画像データの内の前記オーバーラップ領域の画像データから、副走査方向の基準位置の基準データと、前記基準データのオーバーラップ領域に重複する領域における比較データとを求め、前記基準データと前記比較データとを比較する処理を、前記比較データの位置を副走査方向に移動させた複数の位置について行い、前記基準データと前記複数の副走査方向の位置についての前記比較データとの類似度を算出し、前記類似度を示す類似度データを出力する類似度算出処理と、
前記類似度データから前記複数の副走査方向の位置での比較データの内の最も類似度が高い比較データの位置を求め、前記基準データの副走査方向の位置と前記最も類似度が高い比較データの位置との差分に基づき位置ずれ量を算出し、前記位置ずれ量を示す位置ずれ量データを出力する位置ずれ推定処理と、前記類似度データの値に基づき前記類似度データの極値を検出する処理を行い、前記処理の結果と前記検出された極値の数とに基づいて前記オーバーラップ領域における前記位置ずれ量の信頼度を設定し、前記信頼度を示す信頼度データを出力する信頼度判定処理と、前記信頼度判定処理で出力された前記信頼度データに基づいて、前記オーバーラップ領域である第１の領域における前記位置ずれ量データを、前記第１の領域での信頼度よりも高い信頼度を持ち、前記第１の領域と異なる他のオーバーラップ領域である第２の領域における位置ずれ量データによって補正する相関位置補正処理と、前記相関位置補正処理で補正された位置ずれ量データに基づいて前記画像メモリから読み出される画像データの内の、前記隣り合うラインセンサによって読み出された画像データを結合することによって合成画像データを生成する結合処理とをコンピュータに実行させ、前記第２の領域は、前記第１の領域の直ぐ隣のオーバーラップ領域の少なくとも一方を含むことを特徴としている。
In the program according to another aspect of the present invention, the plurality of line sensors arranged in the main scanning direction have an overlap region in which ends of reading ranges of adjacent line sensors among the plurality of line sensors overlap each other. A reference position reference in the sub-scanning direction from the image data in the overlap area of the image data read from the image memory storing image data based on the generated image signal by the imaging unit arranged in Data and comparison data in an area overlapping with an overlap area of the reference data, and a process of comparing the reference data and the comparison data is performed by moving a position of the comparison data in a sub-scanning direction. Performing the position, calculating the similarity between the reference data and the comparison data for the plurality of positions in the sub-scanning direction, A similarity calculation processing for outputting the similarity data indicating a similarity score,
The position of the comparison data having the highest similarity among the comparison data at the plurality of positions in the sub-scanning direction is obtained from the similarity data, and the position of the reference data in the sub-scanning direction and the comparison data having the highest similarity. A positional deviation estimation process for calculating a positional deviation amount based on a difference from the position of the position and outputting positional deviation amount data indicating the positional deviation amount, and detecting an extreme value of the similarity data based on the value of the similarity data The reliability of the positional deviation amount in the overlap region is set based on the result of the processing and the number of detected extreme values, and the reliability data indicating the reliability is output. On the basis of the degree determination process and the reliability data output in the reliability determination process, the positional deviation amount data in the first area, which is the overlap area, is converted into the signal in the first area. Correlation position correction processing for correcting by positional deviation amount data in the second region, which is another overlap region different from the first region, having a higher reliability than the first region, and corrected by the correlation position correction processing Causing a computer to execute a combining process for generating composite image data by combining image data read out by the adjacent line sensors in image data read out from the image memory based on positional deviation amount data; The second region includes at least one of the overlap regions immediately adjacent to the first region .
Claims (8)
前記画像信号に基づく画像データを格納する画像メモリと、
前記画像メモリから読み出された前記画像データの内の前記オーバーラップ領域の画像データから、副走査方向の基準位置の基準データと、前記基準データのオーバーラップ領域に重複する領域における比較データとを求め、前記基準データと前記比較データとを比較する処理を、前記比較データの位置を副走査方向に移動させた複数の位置について行い、前記基準データと前記複数の副走査方向の位置についての前記比較データとの類似度を算出し、前記類似度を示す類似度データを出力する類似度算出部と、
前記類似度データから前記複数の副走査方向の位置での比較データの内の最も高い類似度を持つ比較データの位置を求め、前記基準データの副走査方向の位置と前記最も高い類似度を持つ比較データの位置との差分に基づき位置ずれ量を算出し、前記位置ずれ量を示す位置ずれ量データを出力する位置ずれ推定部と、
前記類似度データの値に基づき前記類似度データの極値を検出する処理を行い、前記処理の結果と前記検出された極値の数とに基づいて前記オーバーラップ領域における前記位置ずれ量の信頼度を設定し、前記信頼度を示す信頼度データを出力する信頼度判定部と、
前記信頼度判定部から出力された前記信頼度データに基づいて、前記オーバーラップ領域である第１の領域における前記位置ずれ量データを、前記第１の領域での信頼度よりも高い信頼度を持ち、前記第１の領域と異なる他のオーバーラップ領域である第２の領域における位置ずれ量データによって補正する相関位置補正部と、
前記相関位置補正部によって補正された位置ずれ量データに基づいて前記画像メモリから読み出される画像データの内の、前記隣り合うラインセンサによって読み出された画像データを結合することによって合成画像データを生成する結合処理部と
を備え、
前記第２の領域は、前記第１の領域の直ぐ隣のオーバーラップ領域の少なくとも一方を含むこと
を特徴とする画像処理装置。 A plurality of line sensors arranged in the main scanning direction are generated by an imaging unit arranged so that end portions of reading ranges of adjacent line sensors of the plurality of line sensors overlap each other. In an image processing apparatus that processes an image signal,
An image memory for storing image data based on the image signal;
From the image data in the overlap area of the image data read out from the image memory, reference data at a reference position in the sub-scanning direction and comparison data in an area overlapping the overlap area of the reference data The process of obtaining and comparing the reference data and the comparison data is performed for a plurality of positions where the position of the comparison data is moved in the sub-scanning direction, and the reference data and the plurality of positions in the sub-scanning direction are A similarity calculation unit that calculates similarity with comparison data and outputs similarity data indicating the similarity;
The position of the comparison data having the highest similarity among the comparison data at the plurality of positions in the sub-scanning direction is obtained from the similarity data, and the position having the highest similarity with the position in the sub-scanning direction of the reference data is obtained. A positional deviation estimation unit that calculates a positional deviation amount based on a difference from the position of the comparison data and outputs positional deviation amount data indicating the positional deviation amount;
A process of detecting an extreme value of the similarity data based on the value of the similarity data is performed, and the positional deviation amount reliability in the overlap region is determined based on the result of the process and the number of detected extreme values. A reliability determination unit that sets a degree and outputs reliability data indicating the reliability;
Based on the reliability data output from the reliability determination unit, the positional deviation amount data in the first region that is the overlap region is given a higher reliability than the reliability in the first region. A correlation position correction unit that corrects by positional deviation amount data in a second region that is another overlap region different from the first region;
Composite image data is generated by combining the image data read by the adjacent line sensors among the image data read from the image memory based on the positional deviation amount data corrected by the correlation position correction unit. and a coupling unit for,
The image processing apparatus according to claim 2, wherein the second area includes at least one of an overlap area immediately adjacent to the first area .
を含むことを特徴とする請求項１に記載の画像処理装置。 The second region includes at least one of an overlap region immediately adjacent to the first region and at least one of an overlap region adjacent to the second region from the first region. Item 8. The image processing apparatus according to Item 1 .
前記複数の副走査方向の位置での比較データの内の前記類似度データの値の極値を検出する処理を行う極値検出部と、
前記極値を検出する処理の結果と前記検出された極値の数とに基づいて前記信頼度データを生成する信頼度設定部と、
を有することを特徴とする請求項１又は２に記載の画像処理装置。 The reliability determination unit
An extreme value detection unit that performs a process of detecting an extreme value of the value of the similarity data in the comparison data at the plurality of positions in the sub-scanning direction;
A reliability setting unit that generates the reliability data based on a result of the process of detecting the extreme value and the number of detected extreme values ;
The image processing apparatus according to claim 1 or 2, characterized in that it has a.
前記信頼度データに基づいて、互いに隣接するオーバーラップ領域間の前記位置ずれ量データを補間処理して、補正位置ずれ量データを生成する補正位置生成部と、
当該オーバーラップ領域における前記位置ずれ量データと補正位置ずれ量とから、結合のための補正後の位置ずれ量データを求める結合位置決定部と、
を有し、
当該オーバーラップ領域での前記位置ずれ量データを、隣接する他のオーバーラップ領域の内の前記高い信頼度を持つオーバーラップ領域での位置ずれ量データに基づき補正する
ことを特徴とする請求項１から３のいずれか１項に記載の画像処理装置。 The correlation position correction unit
Based on the reliability data, a correction position generation unit that generates correction position deviation amount data by interpolating the position deviation amount data between adjacent overlap areas;
A combined position determination unit for obtaining corrected positional deviation amount data for coupling from the positional deviation amount data and the corrected positional deviation amount in the overlap region;
Have
2. The position shift amount data in the overlap region is corrected based on the position shift amount data in the overlap region having the high reliability among other adjacent overlap regions. 4. The image processing device according to any one of items 1 to 3 .
前記位置ずれ量データと、１ライン前の位置ずれ量データとの変化量を算出する変化量算出部と、
前記信頼度データに基づき、当該オーバーラップ領域とその隣接する他のオーバーラップ領域における前記変化量を補間処理し、補正変化量を生成する補正変化量生成部と、
前記１ライン前の位置ずれ量データとの前記補正変化量とを加算処理し、結合のための補正後の位置ずれ量データを求める結合位置決定部と、
を有し、
前記当該オーバーラップ領域での前記位置ずれ量データを、隣接する他のオーバーラップ領域の内の前記高い信頼度を持つオーバーラップ領域での位置ずれ量データに基づき補正する
ことを特徴とする請求項１から３のいずれか１項に記載の画像処理装置。 The correlation position correction unit
A change amount calculation unit that calculates a change amount between the positional deviation amount data and the positional deviation amount data of one line before;
Based on the reliability data, a correction change amount generation unit that interpolates the change amount in the overlap region and another overlap region adjacent thereto, and generates a correction change amount;
A combined position determination unit that adds the correction change amount to the positional deviation amount data of the previous line and obtains corrected positional deviation amount data for coupling;
Have
The position shift amount data in the overlap region is corrected based on the position shift amount data in the overlap region having the high reliability of the other adjacent overlap regions. The image processing apparatus according to any one of 1 to 3 .
前記画像信号に基づく画像データを画像メモリに格納する格納ステップと、
前記画像メモリから読み出された前記画像データの内の前記オーバーラップ領域の画像データから、副走査方向の基準位置の基準データと、前記基準データのオーバーラップ領域に重複する領域における比較データとを求め、前記基準データと前記比較データとを比較する処理を、前記比較データの位置を副走査方向に移動させた複数の位置について行い、前記基準データと前記複数の副走査方向の位置についての前記比較データとの類似度を算出し、前記類似度を示す類似度データを出力する類似度算出ステップと、
前記類似度データから前記複数の副走査方向の位置での比較データの内の最も高い類似度を持つ比較データの位置を求め、前記基準データの副走査方向の位置と前記最も高い類似度を持つ比較データの位置との差分に基づき位置ずれ量を算出し、前記位置ずれ量を示す位置ずれ量データを出力する位置ずれ推定ステップと、
前記類似度データの値に基づき前記類似度データの極値を検出する処理を行い、前記処理の結果と前記検出された極値の数とに基づいて前記オーバーラップ領域における前記位置ずれ量の信頼度を設定し、前記信頼度を示す信頼度データを出力する信頼度判定ステップと、
前記信頼度判定ステップで出力された前記信頼度データに基づいて、前記オーバーラップ領域である第１の領域における前記位置ずれ量データを、前記第１の領域での信頼度よりも高い信頼度を持ち、前記第１の領域と異なる他のオーバーラップ領域である第２の領域における位置ずれ量データによって補正する相関位置補正ステップと、
前記相関位置補正ステップで補正された位置ずれ量データに基づいて前記画像メモリから読み出される画像データの内の、前記隣り合うラインセンサによって読み出された画像データを結合することによって合成画像データを生成する結合処理ステップと
を有し、
前記第２の領域は、前記第１の領域の直ぐ隣のオーバーラップ領域の少なくとも一方を含むこと
を特徴とする画像処理方法。 A plurality of line sensors arranged in the main scanning direction are generated by an imaging unit arranged so that end portions of reading ranges of adjacent line sensors of the plurality of line sensors overlap each other. An image processing method for processing an image signal,
A storing step of storing image data based on the image signal in an image memory;
From the image data in the overlap area of the image data read out from the image memory, reference data at a reference position in the sub-scanning direction and comparison data in an area overlapping the overlap area of the reference data The process of obtaining and comparing the reference data and the comparison data is performed for a plurality of positions where the position of the comparison data is moved in the sub-scanning direction, and the reference data and the plurality of positions in the sub-scanning direction are A similarity calculation step of calculating similarity with comparison data and outputting similarity data indicating the similarity;
The position of the comparison data having the highest similarity among the comparison data at the plurality of positions in the sub-scanning direction is obtained from the similarity data, and the position having the highest similarity with the position in the sub-scanning direction of the reference data is obtained. A positional deviation estimation step of calculating a positional deviation amount based on a difference from the position of the comparison data and outputting positional deviation amount data indicating the positional deviation amount;
A process of detecting an extreme value of the similarity data based on the value of the similarity data is performed, and the positional deviation amount reliability in the overlap region is determined based on the result of the process and the number of detected extreme values. A reliability determination step of setting a degree and outputting reliability data indicating the reliability;
Based on the reliability data output in the reliability determination step, the positional deviation amount data in the first area that is the overlap area is given a higher reliability than the reliability in the first area. A correlation position correction step for correcting by positional deviation amount data in the second area which is another overlap area different from the first area;
Composite image data is generated by combining the image data read by the adjacent line sensors among the image data read from the image memory based on the positional deviation amount data corrected in the correlation position correction step. and binding process steps that possess,
The image processing method, wherein the second area includes at least one of an overlap area immediately adjacent to the first area .
前記撮像部によって、生成された画像信号に基づく画像データを格納する画像メモリと、
前記画像メモリから読み出された前記画像データの内の前記オーバーラップ領域の画像データから、副走査方向の基準位置の基準データと、前記基準データのオーバーラップ領域に重複する領域における比較データとを求め、前記基準データと前記比較データとを比較する処理を、前記比較データの位置を副走査方向に移動させた複数の位置について行い、前記基準データと前記複数の副走査方向の位置についての前記比較データとの類似度を算出し、前記類似度を示す類似度データを出力する類似度算出部と、
前記類似度データから前記複数の副走査方向の位置での比較データの内の最も高い類似度を持つ比較データの位置を求め、前記基準データの副走査方向の位置と前記最も類似度が高い比較データの位置との差分に基づき位置ずれ量を算出し、前記位置ずれ量を示す位置ずれ量データを出力する位置ずれ推定部と、
前記類似度データの値に基づき前記類似度データの極値を検出する処理を行い、前記処理の結果と前記検出された極値の数とに基づいて前記オーバーラップ領域における前記位置ずれ量の信頼度を設定し、前記信頼度を示す信頼度データを出力する信頼度判定部と、
前記信頼度判定部から出力された前記信頼度データに基づいて、前記オーバーラップ領域である第１の領域における前記位置ずれ量データを、前記第１の領域での信頼度よりも高い信頼度を持ち、前記第１の領域と異なる他のオーバーラップ領域である第２の領域における位置ずれ量データによって補正する相関位置補正部と、
前記相関位置補正部によって補正された位置ずれ量データに基づいて前記画像メモリから読み出される画像データの内の、前記隣り合うラインセンサによって読み出された画像データを結合することによって合成画像データを生成する結合処理部と
を備え、
前記第２の領域は、前記第１の領域の直ぐ隣のオーバーラップ領域の少なくとも一方を含むこと
を特徴とする画像読取装置。 A plurality of line sensors arranged in the main scanning direction, an image pickup unit arranged so as to have an overlap region in which ends of reading ranges of adjacent line sensors among the plurality of line sensors overlap each other;
An image memory for storing image data based on the image signal generated by the imaging unit;
From the image data in the overlap area of the image data read out from the image memory, reference data at a reference position in the sub-scanning direction and comparison data in an area overlapping the overlap area of the reference data The process of obtaining and comparing the reference data and the comparison data is performed for a plurality of positions where the position of the comparison data is moved in the sub-scanning direction, and the reference data and the plurality of positions in the sub-scanning direction are A similarity calculation unit that calculates similarity with comparison data and outputs similarity data indicating the similarity;
A position of comparison data having the highest similarity among the comparison data at the plurality of positions in the sub-scanning direction is obtained from the similarity data, and the position having the highest similarity with the position in the sub-scanning direction of the reference data is obtained. A positional deviation estimation unit that calculates a positional deviation amount based on a difference from the data position and outputs positional deviation amount data indicating the positional deviation amount;
A process of detecting an extreme value of the similarity data based on the value of the similarity data is performed, and the positional deviation amount reliability in the overlap region is determined based on the result of the process and the number of detected extreme values. A reliability determination unit that sets a degree and outputs reliability data indicating the reliability;
Based on the reliability data output from the reliability determination unit, the positional deviation amount data in the first region that is the overlap region is given a higher reliability than the reliability in the first region. A correlation position correction unit that corrects by positional deviation amount data in a second region that is another overlap region different from the first region;
Composite image data is generated by combining the image data read by the adjacent line sensors among the image data read from the image memory based on the positional deviation amount data corrected by the correlation position correction unit. and a coupling unit for,
The image reading apparatus, wherein the second area includes at least one of an overlap area immediately adjacent to the first area .
前記類似度データから前記複数の副走査方向の位置での比較データの内の最も類似度が高い比較データの位置を求め、前記基準データの副走査方向の位置と前記最も類似度が高い比較データの位置との差分に基づき位置ずれ量を算出し、前記位置ずれ量を示す位置ずれ量データを出力する位置ずれ推定処理と、
前記類似度データの値に基づき前記類似度データの極値を検出する処理を行い、前記処理の結果と前記検出された極値の数とに基づいて前記オーバーラップ領域における前記位置ずれ量の信頼度を設定し、前記信頼度を示す信頼度データを出力する信頼度判定処理と、
前記信頼度判定処理で出力された前記信頼度データに基づいて、前記オーバーラップ領域である第１の領域における前記位置ずれ量データを、前記第１の領域での信頼度よりも高い信頼度を持ち、前記第１の領域と異なる他のオーバーラップ領域である第２の領域における位置ずれ量データによって補正する相関位置補正処理と、
前記相関位置補正処理で補正された位置ずれ量データに基づいて前記画像メモリから読み出される画像データの内の、前記隣り合うラインセンサによって読み出された画像データを結合することによって合成画像データを生成する結合処理と
をコンピュータに実行させ、
前記第２の領域は、前記第１の領域の直ぐ隣のオーバーラップ領域の少なくとも一方を含むこと
を特徴するプログラム。 A plurality of line sensors arranged in the main scanning direction are generated by an imaging unit arranged so that end portions of reading ranges of adjacent line sensors of the plurality of line sensors overlap each other. From the image data in the overlap area of the image data read from the image memory that stores image data based on the image signal, to the reference data of the reference position in the sub-scanning direction and the overlap area of the reference data The comparison data in the overlapping region is obtained, and the process of comparing the reference data and the comparison data is performed for a plurality of positions where the position of the comparison data is moved in the sub-scanning direction, A level of similarity between the position in the sub-scanning direction and the comparison data is calculated and similarity data indicating the degree of similarity is output And the degree calculation process,
The position of the comparison data having the highest similarity among the comparison data at the plurality of positions in the sub-scanning direction is obtained from the similarity data, and the position of the reference data in the sub-scanning direction and the comparison data having the highest similarity. A positional deviation estimation process for calculating a positional deviation amount based on the difference between the position and the position deviation amount data indicating the positional deviation amount;
A process of detecting an extreme value of the similarity data based on the value of the similarity data is performed, and the positional deviation amount reliability in the overlap region is determined based on the result of the process and the number of detected extreme values. A reliability determination process for setting reliability and outputting reliability data indicating the reliability;
Based on the reliability data output in the reliability determination process, the positional deviation amount data in the first region that is the overlap region is given a higher reliability than the reliability in the first region. A correlation position correction process for correcting by positional deviation amount data in the second area which is another overlap area different from the first area;
Composite image data is generated by combining the image data read by the adjacent line sensors among the image data read from the image memory based on the positional deviation amount data corrected by the correlation position correction processing. a coupling process that is executed by a computer,
The second region includes at least one of the overlap regions immediately adjacent to the first region.
A program that features .
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