An image blur degree determining method, applied to an electronic device, wherein the method comprises: obtaining an original image; determining a homography transformation matrix corresponding to each image block arranged in a column direction in the original image, wherein the column direction is perpendicular to a row direction in which the electronic device performs row-by-row exposure; and determining a blur degree of the original image based on each image block and the corresponding homography transformation matrix, wherein the determining a blur degree corresponding to the original image based on each image block and the corresponding homography transformation matrix comprises: determining, for each image block based on the image block and the corresponding homography transformation matrix, a blur degree corresponding to the image block; and determining an average value of blur degrees corresponding to all image blocks, wherein the average value is the blur degree corresponding to the original image, and characterised in that the determining, for each image block based on the image block and the corresponding homography transformation matrix, a blur degree corresponding to the image block comprises: determining, for a target point in each image block, first coordinates of the target point in the image block, the target point in each image block is a middle point in the corresponding image block; transforming the first coordinates of the target point by using the homography transformation matrix, to determine second coordinates corresponding to the target point after transformation; and determining, based on coordinate differences between the first coordinates and the second coordinates, the blur degree corresponding to the image block, wherein the coordinate differences comprise a coordinate difference in the row direction and a coordinate difference in the column direction. obtaining an original image; determining a homography transformation matrix corresponding to each image block arranged in a column direction in the original image, wherein the column direction is perpendicular to a row direction in which the electronic device performs row-by-row exposure; and determining a blur degree of the original image based on each image block and the corresponding homography transformation matrix, wherein the determining a blur degree corresponding to the original image based on each image block and the corresponding homography transformation matrix comprises: determining, for each image block based on the image block and the corresponding homography transformation matrix, a blur degree corresponding to the image block; and determining an average value of blur degrees corresponding to all image blocks, wherein the average value is the blur degree corresponding to the original image, and determining, for each image block based on the image block and the corresponding homography transformation matrix, a blur degree corresponding to the image block; and determining an average value of blur degrees corresponding to all image blocks, wherein the average value is the blur degree corresponding to the original image, and characterised in that the determining, for each image block based on the image block and the corresponding homography transformation matrix, a blur degree corresponding to the image block comprises: determining, for a target point in each image block, first coordinates of the target point in the image block, the target point in each image block is a middle point in the corresponding image block; transforming the first coordinates of the target point by using the homography transformation matrix, to determine second coordinates corresponding to the target point after transformation; and determining, based on coordinate differences between the first coordinates and the second coordinates, the blur degree corresponding to the image block, wherein the coordinate differences comprise a coordinate difference in the row direction and a coordinate difference in the column direction. determining, for a target point in each image block, first coordinates of the target point in the image block, the target point in each image block is a middle point in the corresponding image block; transforming the first coordinates of the target point by using the homography transformation matrix, to determine second coordinates corresponding to the target point after transformation; and determining, based on coordinate differences between the first coordinates and the second coordinates, the blur degree corresponding to the image block, wherein the coordinate differences comprise a coordinate difference in the row direction and a coordinate difference in the column direction.