Abstract: A blemish detection method includes the following steps: capturing a first image using an image sensor; adjusting the brightness of the first image to obtain a second image; calculating a brightness ratio of each pixel in the second image; marking the pixels of which the brightness ratios are greater than or equal to a predetermined reference value as “1”, and marking the other pixels as “0”; calculating the quantity of pixels in a continuous area in which all pixels are marked as “1”; and determining that the continuous area is a blemish if the quantity of pixels in the continuous area is greater than or equal to a predetermined pixel quantity.

Abstract: A blemish detection method includes the following steps: capturing a first image using an image sensor; adjusting the brightness of the first image to obtain a second image; calculating a brightness ratio of each pixel in the second image; marking the pixels of which the brightness ratios are greater than or equal to a predetermined reference value as “1”, and marking the other pixels as “0”; calculating the quantity of pixels in a continuous area in which all pixels are marked as “1”; and determining that the continuous area is a blemish if the quantity of pixels in the continuous area is greater than or equal to a predetermined pixel quantity.

Abstract: An image blemish detecting system includes an image capturing module, a brightness adjusting module, and a blemish detecting module. The image capturing module captures an image. The brightness adjusting module adjusts the brightness of the image to obtain a second image having substantially uniform brightness. The blemish detecting module calculates a brightness ratio of each pixel in the second image, marks the pixels of which the brightness ratios are not smaller than a predetermined reference value as “1”, and marks the other pixels as “0”. The blemish detecting module calculates the quantity of the pixels in a continuous area in which all pixels are marked as “1”, and determines that the continuous area is a blemish if the quantity of the pixels in the continuous area is greater than or equal to the predetermined pixel quantity.

Abstract: An image correction device includes a test chart, an image capturing module, an image separating module, a processing module, a first calculating module, a second calculating module, and a correction module. The image capturing module includes an image sensor for capturing an image of the test chart. The image includes two second circular black spots. The image separating module separates the image, thus obtaining a channel image. The processing module is for binarizing the channel image, thus obtaining a binary image of the channel image. The first calculating module calculates coordinates of the centers of the two second spots of the binary image. The second calculating module calculates a rotated angle of the image. The correction module inputs the rotated angle into the image sensor so that the image sensor corrects the image.

Abstract: An image correction device includes an image capturing module, a first calculating module, a second calculating module, a third calculating module, and a correction module. The image capturing module includes an image sensor having a center (Xo, Yo). The image capturing module takes an image of a test chart. A center of the group of black stripes is coincident with a center of the image. The first calculating module is for calculating coordinates of a center of each black stripe of the group of black stripes. The second calculating module is for calculating coordinates (Xc, Yc) of the center of the image. The third calculating module is for calculating a coordinate deviation (?X, ?Y)=(Xc?Xo, Yc?Yo). The correction module is for inputting the coordinate deviation (?X, ?Y) into the image sensor so that the image sensor corrects the image according to the coordinate deviation (?X, ?Y).

Abstract: An image correction device includes a test chart, an image capturing module, an image separating module, a processing module, a first calculating module, a second calculating module, and a correction module. The image capturing module includes an image sensor for capturing an image of the test chart. The image includes two second circular black spots. The image separating module separates the image, thus obtaining a channel image. The processing module is for binarizing the channel image, thus obtaining a binary image of the channel image. The first calculating module calculates coordinates of the centers of the two second spots of the binary image. The second calculating module calculates a rotated angle of the image. The correction module inputs the rotated angle into the image sensor so that the image sensor corrects the image.

Abstract: An image blemish detecting system includes an image capturing module, a brightness adjusting module, and a blemish detecting module. The image capturing module captures an image. The brightness adjusting module adjusts the brightness of the image to obtain a second image having substantially uniform brightness. The blemish detecting module calculates a brightness ratio of each pixel in the second image, marks the pixels of which the brightness ratios are not smaller than a predetermined reference value as “1”, and marks the other pixels as “0”. The blemish detecting module calculates the quantity of the pixels in a continuous area in which all pixels are marked as “1”, and determines that the continuous area is a blemish if the quantity of the pixels in the continuous area is greater than or equal to the predetermined pixel quantity.

Abstract: An image correction device includes an image capturing module, a first calculating module, a second calculating module, a third calculating module, and a correction module. The image capturing module includes an image sensor having a center (Xo, Yo). The image capturing module takes an image of a test chart. A center of the group of black stripes is coincident with a center of the image. The first calculating module is for calculating coordinates of a center of each black stripe of the group of black stripes. The second calculating module is for calculating coordinates (Xc, Yc) of the center of the image. The third calculating module is for calculating a coordinate deviation (?X, ?Y)=(Xc?Xo, Yc?Yo). The correction module is for inputting the coordinate deviation (?X, ?Y) into the image sensor so that the image sensor corrects the image according to the coordinate deviation (?X, ?Y).